Bahnson Environmental Specialties, LLC.
4412 Tryon Road
Raleigh, NC 27606-4218
919.829.9300  Fax: 919.829.7357
Sales/Project Fax: 919.833.9476
www.eschambers.com
GENERAL SPECIFICATIONS
CONTROLLED ENVIRONMENT
CHAMBERS
PREPARED FOR:
COMPANY NAME
Name of Client (s)
PREPARED BY:
BAHNSON ENVIRONMENTAL SPECIALTIES, LLC
Name of PSS
DATE:
rev. 12-16-2012
CONTROLLED ENVIRONMENT CHAMBERS
Notice to editor:
This document serves as the basis of specification for ‘standard’ environmental chambers only (freezers,
cold rooms, warm rooms), and does require moderate to extensive revision for special variations
(cleanrooms, ultra-low freezers, ultra-dry rooms, thermal shock, explosion safe, etc). Further note that
items noted with “as required” and “as applicable” should be carefully reviewed during editing, and
such items accepted or stricken as required, for sake of clarity to all bidders.
1.0
DESCRIPTION
This section consists of all labor, materials, equipment and services necessary to complete the
work of the controlled environment chamber:
1.1.
1.1.1
The environmental chamber shall be prefabricated, all metal clad construction,
furnished and installed as a complete self-contained unit and system, including all
essential conditioning plenums, mechanical equipment, lighting fixtures, controls,
balanced air circulation, and other equipment necessary to reach the environmental
conditions specified.
1.1.2
All major sub-assemblies shall be factory assembled and tested, including the
conditioning unit, condensing unit, and control panel, prior to delivery. Documentation
of factory testing is available to owner/designer upon request.
1.1.3
The delivery of chamber components to their final location and complete assembly of
chambers in place are by factory trained technicians or sub-contract assistance under
direct supervision by factory trained technicians.
1.1.4
The installation and materials of all associated field refrigeration piping and electrical
wiring connections integral to the chamber are included.
1.1.5
Start-up and field testing of chamber are by factory trained technical personnel.
2.0
SUBMITTALS
2.1
Product Data: Submit manufacturer's standard technical data describing the environmental
chamber. The Project Outline and Detailed Review Sheet at the end of this document shall be
completed by all manufacturers submitting cost figures. This sheet is reviewed by the
Owner/Designer and is used for final selection of manufacturer. All information must be
provided as requested.
2.2
Shop Drawings/Submittals: Submit a detailed project submittal, with a shop drawing showing
layout, elevations, typical sections and details.
2.2.1
Gen-gs (rev 12-16-12)
Provide an architectural drawing showing room layout, including all interior and
exterior dimensions, in conjunction with adjoining construction by others. Include a
chamber roof plan, indicating general layout of mechanical equipment, with access
Page 1 of 20
points and service clearance indicated. Show all plans, elevations, and sections at a
suitable scale for ease of viewing; multiple drawings or D-sized prints are supplied as
required.
2.22
Provide detail of the control system, including details on interface, control method,
alarming capability, recording capability, defrost timing (as applicable), remote
communication ability, and other similar features. Provide cutsheets on walk-in panel
structure, conditioning system components, control panel, instrumentation, and other
similar features.
2.2.3
Indicate power and water requirements to all electrical and mechanical assemblies, as
they apply. Indicate control temperature and humidity (as applicable) range, uniformity
tolerance. Indicate performance parameters for each room, on which performance is
guaranteed.
3.0
3.1
4.0
4.1
5.0
QUALITY ASSURANCE
The chamber manufacturer shall have manufactured similar equipment for a minimum of ten
(10) years and have an ongoing Preventive Maintenance (P.M.)/service contract program. The
chamber manufacturer shall have provided and installed a chamber of similar size and
complexity, and of equivalent design and performance on a minimum of ten (10) previous
projects. The chamber manufacturer shall provide factory-trained technicians of the company
(crews) for factory installation of the chambers, or provide supervision of sub-contract
assistance by a factory trained technician. This shall provide the owner with personnel
thoroughly knowledgeable with the equipment, installation, and performance. On request, the
approved manufacturer must demonstrate evidence of adequate engineering personnel,
manufacturing facilities, and financial stability. The manufacturer must maintain stock of
mechanical/electrical materials for emergency maintenance and routine maintenance.
PRODUCT HANDLING
Compliance with the manufacturer's recommendations regarding handling and storage of
environmental chamber components before and during construction is mandatory.
WARRANTY AND SERVICES
5.1
Mechanical refrigeration equipment, parts, and labor shall be guaranteed in written form for a
period of one (1) year from the date of chamber start-up. The insulated enclosure shall carry an
additional nine (9) year warranty on material. The warranties shall guarantee that the chamber
shall maintain within the specified tolerance the selected temperature and humidity settings (as
applicable), be free from condensate on the outside of the chamber, and be free from defects
due to faulty materials or workmanship.
5.2
The chamber installer shall provide a service contract proposal and shall warrant the
equipment for a period of one (1) year. The service contract shall provide emergency callback
service typically within one (1) hour on a 24-hour, 7-days a week basis during the warranty
Gen-gs (rev 12-16-12)
Page 2 of 20
period. In addition, the manufacturer shall provide 8-hour emergency service to most locations
in the continental US, and 24-hour non-emergency service by factory personnel or an
authorized service center.
5.3
The warranty shall not apply to equipment subjected to accidents, improper voltage, abuse, or
misuse.
5.4
The manufacturer shall prominently place the name of installer/service agency to be contacted
during warranty period on the equipment.
5.5
Services of a factory-trained representative shall be made available for one (1) day per project
to provide instruction on the control system, review contents of the operation manual, and to
provide general instruction on the proper use and care of the chamber. Instruction shall be
provided by factory trained technicians only; sub-contractors will not be accepted.
5.6
The manufacturer shall have available periodic factory-instructed service seminars on
environmental chamber mechanical and controls equipment to assure the maintenance staff's
familiarity and competence with all operation and maintenance functions to allow self-directed
maintenance if desired.
6.0
MANUFACTURERS
6.1
Acceptable Manufacturer/Basis of Design: The equipment specified for the environmental
chambers is based upon products produced by Bahnson Environmental Specialties, An Emcor
Company, Raleigh, North Carolina.
6.2
Other Acceptable Manufacturers: Subject to compliance with the requirements of this section,
products produced by other manufacturers producing equipment meeting or exceeding the
requirements specified shall be considered. Final approval shall be made by the
owner/architect.
7.0
CHAMBER DESIGN
7.1
Construction: The environmental chamber shall be furnished as a complete functional unit with
all essential ductwork and ductwork connection points, piping, control systems, and complete
conditioning systems to satisfy the required environmental conditions.
7.1.1
The chamber shall be shipped in sections designed to pass without interference through
standard doorways.
7.1.2
Chamber construction shall allow for future disassembly and relocation.
7.1.3
All metal and other materials shall be shaped and sized as required with all angles sharp
and true. All surfaces shall be finished smooth. Punching and shearing shall be neatly
done. Permanent connections shall be welded, riveted, or bolted. All exposed welds
shall be ground smooth and flush with adjacent surfaces. Welded connections in
stainless steel shall be polished to match adjacent stainless steel.
Gen-gs (rev 12-16-12)
Page 3 of 20
7.2
Wall Panel Construction: The chamber shall be constructed of prefabricated, metal-skinned,
urethane panels. The panels shall be constructed of high quality components with 100% of
each panel, exclusive of its metal skins and steel supports, comprised of urethane insulation.
Panels shall have tongue and groove construction with vinyl gaskets fitted on the interior and
exterior of each panel to provide moisture and vapor-tight seal. Each of the four corners shall
be pre-formed 90° angles. No panel shall be less than 12" in horizontal dimension. All
construction shall comply with Factory Mutual Standard #4880 for insulated panel
construction (non-aluminum skins, batten strips along ceiling panels), if required by site
standards. Insulated panels containing wood will not be accepted.
7.2.1
Panels shall be equipped with speed-lock joining devices. The distance between locks
shall not exceed 46 inches. Each device shall consist of a cam-action, hooked locking
arm placed in one panel and a steel rod positioned in the adjoining panel, such that
when the arm is rotated, the hook engages over the rod and draws the panels tightly
together with cam action. Arms and rods shall be housed in individual steel pockets.
The manufacturer shall furnish filler panels of matching metal to extend from the
exterior of the chamber walls to the building walls and lay-in ceiling.
7.2.2
Insulation in the panels shall be a minimum of 4" thick rigid, foamed in place, urethane
foam, with a nominal R-value of 29 minimum. Insulation shall have 97% closed cell
structure, averaging in density 2.2 lbs./cu.ft. The foam core of the panels shall be
Underwriters Laboratories certified as having flame spread of 25" or lower and smoke
generation of 450 or lower when tested in accordance with ASTM E-84-76 and UL-723.
Panels shall be approved by Factory Mutual as a Class I building type. They shall meet
1998 CFC standards as set by the 1987 Montreal Protocol, employing a process that
reduces CFC use by 60% or more. Insulation must remain stable at an operating
temperature range of –90.0°F to +200.0°F (non-humidified). Panels shall carry the UL
label.
7.2.3
The wall panel interior and exterior finishes shall be any combination of aluminum (as
permitted for non-FM rated), galvalume steel, stainless steel, or painted steel. As
applicable for painted steel, the paint shall be factory-applied, baked on,
enamel/polyester finish, of thickness 1 mil minimum, and white color. Paint shall be
chemical resistant, nontoxic and odorless. Paint shall be sprayed on and not applied
with brush or roller for uniform appearance and texture.
7.3
Floor Panel Construction: Chambers that use an insulated floor shall be provided as one which
allows fastening to the wall panels by cam-locking floor to walls. The floor panels shall be clad
on the interior and exterior with the specified metal skin and utilize urethane insulation.
7.3.1
The floor panels shall be capable of withstanding a minimum of 600 lbs./sq.ft. loading.
Additional loading shall require overlay of aluminum or steel plating.
7.3.2
The floor finish shall be galvanized steel or stainless steel as required.
7.4
Door: The door shall be an in-fitting, flush-mounted type with a minimum free span of 36"W X
78"H, or as shown on the drawings. The door shall have the same metal finish and insulation as
adjacent walls. A thermoplastic gasket with a magnetic core shall be mounted on the top edge
and along both sides of the door. The magnetic force of the gasket shall keep the door closed
Gen-gs (rev 12-16-12)
Page 4 of 20
and the gasket shall form a tight seal. The bottom edge of the door shall contain a flexible, dual
blade, wiper gasket. The door gaskets shall be NSF approved. Construction of the door panel
shall include a structural fiberglass pultrusion around the entire perimeter of the door opening
encompassing thermal resistance and structural strength to eliminate door warping and thermal
bow characteristics.
7.4.1
A chamber that operates at or below 0ºC., or has high relative humidity at 30ºC or
higher, shall have anti-condensate heater wires concealed behind the metal edge of the
doorjamb on all four sides. Heaters shall automatically provide sufficient heat to
eliminate condensation and frost under various ambient humidity conditions.
7.4.2
The door shall use two or three hinges that are spring-loaded and self-closing. The
hinges shall have plated steel pins and Delrin lifting cam bearings. The door latch shall
be designed to open the door easily by breaking the magnetic force of the door gasket.
The latch shall have a cylinder lock and provisions for padlocking. It shall also include
an inside safety release handle to prevent entrapment in the chamber. The door
hardware shall be satin-finish aluminum, or chrome plated zinc or steel.
7.5
Observation Window: As applicable to the chamber door(s) or wall panel(s), provide the
insulated panel manufacturer's standard observation window. The window shall consist of a
minimum of three (3) panes of glass with sealed air spaces in between. The window shall be
removable for future replacement. All chambers that operate at or below 0ºC. shall have
heated window panes. Chambers that operate at high humidity levels shall also be considered
for heated windows.
7.6
Pressure Relief Port: Pressure relief ports shall be utilized for a chamber operating at or below
0°C. The relief port shall be provided to equalize the difference in exterior and interior
pressure caused by the sudden temperature changes when the door is opened. The relief port
shall be heated to prevent freezing.
8.0
CHAMBER ACCESSORIES
8.1
Shelving: Provide removable adjustable shelving as indicated in the Project Outline or separate
drawings. Freestanding shelving shall be four-tier and utilize four (4) 74"or 86" posts. The
shelving shall be adjustable on minimum of 2" centers. Wall mounted shelving shall be twotier and adjustable on minimum of 2" centers. All shelving shall be removable without special
tools and shall be constructed of stainless steel or epoxy coated plated steel with a minimum of
five (5) years corrosion resistance guarantee. Shelving shall be an open wire type. Provide
leveling screw at the base of the posts of freestanding shelving units.
8.2
Casework: Provide casework as indicated in the Project Outline or separate drawings, with all
work surfaces for workbenches and tables constructed of 304 stainless steel for corrosion
resistance and durability. All tubular legs and under counter shelves shall be 304 stainless
steel. Sizes of casework and accessories shall be as summarized for each chamber at the end of
this document.
8.3
Floor Covering:
Gen-gs (rev 12-16-12)
Page 5 of 20
8.3.1
Floor Mat: Provide manufacturer's standard removable 5/32" thick vinyl diamond tread
floor mat to cover all areas of the floor not occupied by shelving or casework.
8.3.2
Seamless Floor Covering: Provide crevice free, non-absorbent, slip resistant vinyl
flooring as manufactured by Altro, Armstrong, or Mannington. The floor covering shall
be seamless or have welded seams, coved 4 inches up the sides of the chamber, and
capped with vinyl trim piece with continuous silicone seal between cap and walls.
Underlayment shall be installed, as recommended by the flooring manufacturer. The
color shall be selected by the Owner's representative from the manufacturer's standard
color selections.
8.4
Receptacles/Wiremold: Provide individual outlets as indicated in the Project Outline or
separate drawings. Outlets shall be vapor-proof, corrosion resistant duplex receptacles (gray
PVC, boxes, and covers). Provide all outlets with weatherproof covers and mount
approximately 45" above the interior floor. Provide wiremold as indicated in the Project
Outline or separate drawings, as required for under-shelf lighting, or for multiple outlet
applications such as casework support. The wiremold shall be brushed aluminum. All visible
conduit shall be provided as UL listed ¾" PVC, minimum.
8.5
Lighting: Provide surface mount vapor-proof lighting spaced evenly throughout the chamber
usable area. All visible conduit shall be provided as UL listed ¾" PVC, minimum.
8.5.1
Lighting in a chamber controlled at or above 0°C shall be vapor proof fluorescent with
T-8 32 watt lamps and high efficiency electronic ballasts. The housing shall be
corrosion-resistant fiberglass or ABS plastic, with internal specular aluminum reflector
for maximum efficiency. The housing cover shall be a clear prismatic acrylic
lens/diffuser with closed-cell neoprene gasketing bonded to the housing to form a
continuous seal for the lens. The housing shall feature cam latches to clamp the
lens/diffuser to the housing.
8.5.2
Lighting in a chamber controlled below 0°C shall be vapor proof fluorescent with T-5
54 watt high output lamps and high efficiency electronic ballasts, or LED as specified.
The housing shall be corrosion-resistant fiberglass or ABS plastic, with internal
specular aluminum reflector for maximum efficiency. The housing cover shall be a clear
prismatic acrylic lens/diffuser with closed-cell neoprene gasketing bonded to the
housing to form a continuous seal for the lens. The housing shall feature cam latches to
clamp the lens/diffuser to the housing.
8.5.3
Light levels in a chamber classified as working chambers shall have a 70 f.c. minimum
at a height of 40" above the floor. Lights shall be mounted above a lay-in ceiling tile
system. The ceiling grid system shall facilitate light diffusion throughout the chamber.
8.5.4
Light levels in a chamber classified as a storage chamber shall have a light intensity of
50 f.c. minimum at a height of 40" above the floor.
8.6
Sleeves/Access Ports: Sleeves for service piping, gas lines, cables, or drain water lines shall be
provided in nominal 1" or 2" PVC, and sealed to the chamber enclosure from both ends with
silicone sealant. The void between permanent piping/lines/cables and the port wall shall be
filled with sealant that remains flexible. Caps shall be provided to seal ports used for
equipment cable/line passage when not in use.
Gen-gs (rev 12-16-12)
Page 6 of 20
8.7
Exhaust Fan/Make-up Air: Chamber shall be provided with exhaust fans and filtered air
intakes, or direct connection make-up air stubs, for ventilation, as defined in the Project
Outline.
8.7.1
The airflow rate for chambers classified as working chamber shall be 1 air change per
hour, or 15 CFM per occupant, whichever is the greater flow rate.
8.7.2
For chamber ambient ventilation, an exhaust fan shall be mounted on the exterior roof
of the chamber and shall exhaust air from the chamber. The ambient make-up air shall
be brought into the chamber through an air intake housing fitted with a filter frame and
replaceable filter. The intake shall be both adjustable and capable of being fully closed.
A manual on/off switch shall be located on the control panel for the fan.
8.7.3
For pre-conditioned air ventilation, an exhaust stub shall be mounted on the exterior
roof of the chamber and shall exhaust air from the chamber. The pre-conditioned makeup air, considered to be from a building cooling system, shall be brought to the inlet
stub. For consistent chamber control, the make-up air shall be continuous, with no
interruption of flow at any time. The inlet and outlet stubs shall be both adjustable and
capable of being fully closed.
8.8
Lay-in Ceiling Grid: Provide a ceiling grid system for even distribution of airflow and light
diffusion.
8.8.1
For chambers with unit coolers, provide 2' x 4' white acrylic eggcrate lay-in
ceiling tiles, supported by a 1.5" x 1.5" anodized aluminum grid system.
8.8.2
For chambers with ceiling plenum units, provide 2' by 2' lay-in perforated prismatic
Lexan ceiling tiles, supported by a 1.5" x 1.5" anodized aluminum grid system.
9.0
CONTROLS AND INSTRUMENTATION
9.1
Control Panel: Provide a NEMA 1 control console mounted on the chamber exterior adjacent
to the door.
9.1.1
The console shall include the control system, main and branch circuit fusing, contactors
and relays, and associated components and wiring to supply the chamber conditioning
systems.
9.1.2
A key locked Lexan door shall be provided for viewing and protecting the settable
control system.
9.1.3
The console shall include stainless steel fronts and Formica side accent panels.
9.1.4
The console shall be provided with offset mounting rails to produce a natural cooling
plenum for heat dissipation.
9.1.5
A stainless steel raceway with integral circuit breaker shall be provided above the
control panel enclosure to conceal conduit and wiring. The raceway shall extend from
the top of the control panel to no less than 2" above the suspended corridor ceiling.
9.1.6
The control console, as an assembled unit, shall be labeled/listed by a certified National
Testing Laboratory such as ETL, UL, MET, etc.
Gen-gs (rev 12-16-12)
Page 7 of 20
9.2
Control System: Provide a touchscreen control system for process temperature and relative
humidity (as applicable) display and control, process alarming, and all circuit switching.
9.2.1
The control system shall feature microprocessor based I/O hardware with fixed
programmed logic. The control logic program shall be stored on a non-volatile, high
capacity memory card EE-prom. All control parameter settings, alarms and setpoints
shall be maintained during power failure, and restart is automatic upon power
restoration. Default units shall be degrees Centigrade, and % Relative Humidity (as
applicable).
9.2.2
A backlit, alphanumeric LCD color touchscreen shall provide operator access to all
system parameters through intuitive, Windows® style drop down menus. The display
shall be no less than six inches, and shall be compatible with low to high room light
levels and multiple viewing angles. Menu selections and on-screen instructions with on
screen help shall be of sufficient detail to allow for typical day-to-day use without
reference manuals.
9.2.3
The control system shall conform to the FDA 21 CFR 11 requirements for data
recording, audit trails of controller settings modification, alarm history logs, operator
event logs and secure file transfers. Operating data shall be encrypted and stored in user
defined time length log files, and shall be viewable on the touchscreen, or remotely by
PC. Password protection shall provide multiple levels of user access and defined rights.
Password aging and re-authentication for process changes shall be provided per 21 CFR
11 specifications. High level encryption and digital signatures shall be supported for
paperless operation.
9.2.4
Real-time trending of temperature and humidity (as applicable) parameters and
setpoints shall be provided. The touchscreen shall provide autoscaled and user definable
scaled plots over a 1 minute to 12 hour time period. A 'drag and zoom' feature shall
allow for magnified views of the trend within a specific plot period. The trend graphs
shall be printable by pressing an on-screen print icon and connecting an optional
printer. Historical data logging shall be provided.
9.2.5
An interface USB port shall allow data transfer to printer or removable memory stick to
maintain local 'paper trail' requirements. A touchscreen 'print' icon shall allow one touch
printout of data trends in report or graphic format. The removable memory stick shall
allow export and import of profiles, alarm files, audit trail files, and other data files.
9.2.6
The control system shall provide independent, adjustable high and low alarm set points
for temperature and humidity. Automatic alarms shall disable specific controlled
devices (heaters, blowers, steam generators, etc), and trigger backup mechanical
conditioning system operation, if supplied (with redundancy option). Operators shall be
notified of alarms through a change to red screen background on the active screen, the
activation of an audible alarm, the switching of a remote alarm contact set, and the
creation of an alarm log with time, date, and type of alarm. Historical alarm logs shall
be available for viewing by the user.
9.2.7
The control system shall provide independent time delay action for each alarm
parameter. Alarm action delays and audible alarm delays shall be each adjustable from
0 to 60 minutes in 1 minute increments. 'Common alarm' contacts shall activate after
alarm action delay (Form C relay - N.O. and N.C contacts provided).
Gen-gs (rev 12-16-12)
Page 8 of 20
9.2.8
The control system shall provide an "intelligent" adaptive defrost timer (as applicable);
time or temperature initiated and time or temperature terminated. By sensing chamber
coil temperature, the timer shall minimize temperature rise due to a defrost cycle. The
adjustable fan time delay, or an evaporator coil temperature sensor, shall terminate the
defrost cycle and pre-cool the evaporator coil to an operator selected temperature before
re-energizing the fans. Defrost shall be automatically disabled through either a user set
coil temperature above freezing, or by exceeding a maximum chamber temperature rise
setpoint.
9.2.9
The control system shall provide "intelligent" enabling/disabling of humidification and
dehumidification (as applicable). Humidification shall be disabled below freezing, and
dehumidification is disabled at factory-selected conditions where drying is not required.
9.2.10
The control system shall provide an adjustable electric heater on-delay. A percent-delay
setting shall allow the electric heat to stage in earlier or later depending upon heat
demand and control capability of the refrigeration hot gas.
9.2.11
The control system shall provide solid state, "zero switching" outputs, for refrigeration
and humidity (as applicable) control. Zero switching outputs shall prevent radio
frequency interference. Standard solenoid or solid state relay cycling shall be provided
on an adjustable time base of 4 to 32 seconds.
9.2.12
The control system shall provide Ethernet connectivity. This feature allows for remote
viewing of chamber process variables and alarms through a web browser. Variables
shall include: actual temperature, actual humidity, process setpoints, and system alarms
with name and date/time of alarms. Data shall be "read only", such that the internal
stored data cannot be altered.
9.2.13
As required, remote monitoring capability shall be provided via 4-20 mA DC scaled
outputs. The output scale range shall have touchscreen adjustable high and low scale
limits.
9.2.14
As required, interfacing capability shall be provided via RS-485 Modbus
communication protocol. This option shall provide access to all user selectable
parameters and measured values, as well as file transfer and viewing of collected data.
9.2.15
As required, a custom interfacing package shall be provided. This option shall provide
the user full read/write access to the runtime registers of the system. This option may
apply to Allen Bradley, Siemens, Johnson Controls, or other popular building system
suppliers.
9.2.16
As required, ramp / soak profile capability shall be provided through drop down menus.
Up to 99 steps with cycle repeats shall be available to provide a virtually unlimited
number of profile steps and unlimited number of profiles (programs). Setup of each
profile shall include desired setpoints, event output state, ramp / soak times, and number
of cycles. Help menus shall provide assistance as needed. Multiple profiles shall be
available, to be named and stored on the internal memory card for future use. The
profile shall be configurable to start at a specific time and day of month.
9.2.17
As required, mechanical A / B system switching / cycling capability shall be provided.
Two types of operation shall be available: alternating and concurrent. The display shall
indicate 'A' or 'B' system failure and selected mode of operation. Alternating operation
shall provide equal runtime for both systems (selectable 12 h, 24 h, or 7 d), and
Gen-gs (rev 12-16-12)
Page 9 of 20
provides an additional selection of defrost method ('before' or 'after' defrost).
Concurrent operation shall provide simultaneous power to both systems for maximum
conditioning capability; a timer shall govern the minimum run time. Both operational
setups shall provide immediate action or delayed action ("product load timer") upon
temperature fault.
9.2.18
As required, multi-point monitoring capability shall be provided. Up to six temperature
inputs shall be monitored, with each input featuring dedicated display and trending.
Historical trending is available for viewing by the user.
9.3
Temperature Sensor: A 316 stainless steel 3-wire platinum 100 OHM RTD temperature sensor
probe shall be provided for each chamber. The sensor shall be mounted at a location for fast
response to varying chamber conditions, and for best detection of average temperature within
the chamber. The sensor shall be field calibrateable to an NIST traceable standard over the
operating range of the chamber. The sensor accuracy shall be +/- 0.2 C. or better.
9.4
Relative Humidity Sensor (as applicable): A solid-state variable capacitance / thin film sensor
shall be provided for each humidity controlled chamber. The sensor shall be temperaturecompensated and calibrated by the sensor manufacturer to NIST traceable standards. The
sensor shall be mounted at a location for fast response to varying chamber conditions, and for
best detection of average humidity within the chamber. The sensor shall be field calibrateable
over the operating range of the chamber. The sensor accuracy shall be +/- 1.0% RH or better.
Wet bulb/dry bulb, lithium chloride, gold grid/aluminum oxide, bulk resistance, chilled mirror,
or similar sensors will not be accepted.
9.5
Recorder: Provide recording of temperature and humidity (as applicable) parameters.
9.5.1
The touchscreen control system shall provide electronic recording of temperature and
humidity parameters and setpoints. Recorder data transfer shall be performed by USB
port memory stick or USB port printer download.
9.5.2
As required, a solid-state circular chart recorder shall be provided to record the
temperature and humidity (as applicable) within each chamber. The recorder shall
feature a 12" diameter chart with programmable selection of 8 hour, 24 hour, or 7 day
chart movement. The recorder shall be provided integral to the control console. The
temperature channel shall be calibrated to a minimum of 10% below and above the
operating range of the chamber, and the humidity channel shall be calibrated over the
operating range of 10% to 98%. The recorder accuracy shall be +/- 1.0% of full scale.
10.0
MECHANICAL EQUIPMENT
10.1
Compressor/Condensing Unit: The compressor/condensing unit shall consist of a water or aircooled semi-hermetic or scroll compressor of the appropriate size to provide performance as
specified in the Project Outline. Hermetic compressors will not be accepted. Refrigerant shall
be non-CFC; R-404A/R-507 or R-134a preferred, with determination by site preference as well
as chamber manufacturer's standard per application. Alternates such as R-407c is acceptable if
required per site standards.
10.1.1
Gen-gs (rev 12-16-12)
The compressor/condensing unit shall provide safe and reliable operation in its location
on top of or remote from the chamber as specified in the Project Outline. All
Page 10 of 20
components of the condensing unit shall be designed for 125 psig working pressure, or
150% of maximum operating pressure, whichever is greater. The condensing unit shall
be designed with time based proportioning of rapid cycle solenoid valves for hot gas
bypass, or as required, fully proportional / modulating electronic hot gas bypass valves.
The refrigeration design shall provide continuous operation, to provide for maximum
compressor life, to eliminate on and off cycling, and to resist RF interference. Cycling
of the compressor is not permitted.
10.1.2
The unit shall have as a minimum: high/low pressure safety control, head pressure
regulator, receiver with fusible plug, liquid line filter-drier with sight glass, crankcase
pressure regulator, suction accumulator, suction line filter, suction and discharge
vibration absorbers or equivalent, and thermal protection. Water cooled units shall
additionally have a water regulating type head pressure regulator, and shell and tube
condenser for periodic cleaning. Rapid cycle style solenoid valves or proportional
valves shall be provided for refrigeration capacity control, as specified above and in the
Project Outline. Electric isolation valves shall be provided on the liquid and hot gas (as
applicable) lines for pumpdown on proportional valve controlled systems.
10.1.3
Condensing units that are located outdoors, or in an unprotected area subject to
temperature extremes, shall have weatherproof housings, low ambient protection, and
crankcase heaters.
10.1.4
The condensing unit shall have a single point electrical connection terminating at a
fused disconnect switch, provided by the electrical contractor.
10.1.5
As required, each chamber shall be furnished with an additional condensing unit for
100% redundancy. Auto or alarmed switchover shall be provided through the
touchscreen control system. The additional condensing unit shall a dedicated single
point electrical connection terminating at a fused disconnect switch provided by the
electrical contractor. As required, the additional condensing unit shall operate
concurrently with the primary system under temporary overload conditions.
10.2
Conditioning Unit: The chamber shall be provided with evaporative unit matched to the
cooling capacity and airflow requirements of the environmental chamber.
10.2.1
Unit Cooler: The chamber shall be provided with a ceiling mounted low profile
evaporator unit for low velocity, uniform air distribution. The housing and drain pan
shall be of formed epoxy painted aluminum, or, as required, stainless steel. The unit
shall feature: permanent split capacitor / electronically commutated / high efficiency
motors, balanced axial fans, heater rods with safety thermostats (as applicable), defrost
termination thermostat (as applicable), removable end panels for servicing, rustproof
hardware and stainless screws, and moisture tight electrical harnesses. The evaporator
coil shall be of copper tube/aluminum fin/aluminum endplate, or as required, shall have
copper or Electrofin coated fins. Drainage during defrost shall be collected in an
aluminum sloped drain pan and run through a 7/8" copper drain line. Chambers
operating at or below 0°C. shall have automatic drain pan heaters.
10.2.2
Ceiling Plenum: The chamber shall be provided with a custom manufactured stainless
steel ceiling plenum unit for uniform air distribution. Modified stainless steel unit
coolers or commercial evaporators are not acceptable. The ceiling plenum shall feature:
high efficiency drive motors, forward curved or backward inclined blower wheels,
Gen-gs (rev 12-16-12)
Page 11 of 20
heater rods with safety thermostats (as applicable), defrost termination thermostat (as
applicable), removable drain pan for servicing, stainless latches and mounting
hardware. Internal direct drive blowers shall be provided as standard, with external
motor drive blower wheels provided as required for conditions above 40°C, or for
external motor servicing requirements. The evaporator coil shall be of copper
tube/aluminum fin/stainless steel endplate, or as required, shall have copper or
Electrofin coated fins. Drainage during defrost shall be collected in a double wall,
sloped, insulated drain pan and run through a 7/8" copper drain line. Chambers
operating at or below 0°C. shall have automatic drain pan heaters.
10.2.3
Low Wall Return: As required, air return to the ceiling conditioning unit shall be
through a reinforced stainless steel low wall return that picks up air low in the chamber.
The wall return shall be furnished with removable and cleanable aluminum mesh filters
to protect the evaporator surface.
10.3
Defrost: An automatic hot gas coil defrost system shall be provided on a chamber operating at
or below 4°C. setpoint (below 0°C. coil design temperature). A chamber operating at or below
0°C setpoint, additional electric heat shall be provided on the coil and the drain pan.
10.4
Humidifier: The chamber shall be provided with a humidification device for additive humidity
within the chamber space.
10.4.1
10.5
Steam Generator: The chamber shall be provided with an electric steam generator. The
tank shall be 316 stainless steel, the heater shall be Incoloy, and all wetted components
shall be compatible with reverse osmosis, distilled, or deionized (separate bed) water.
The steam generator shall feature a stainless steel float switch and stainless solenoid
valve for water level control. The steam generator shall have a separate stainless float
switch to shut down the heater in the even of low water level, or water supply failure.
The control of humidity level shall be through the touchscreen control system. Steam
modulation shall be controlled by time proportioning of the heater through control panel
mounted solid state relays. Steam shall enter the chamber air stream through a copper
steam header located directly behind the ceiling conditioning device. Float valve based,
electrode probe, pressurized boilers, or similar humidifiers will not be accepted.
Dehumidifier: The chamber shall be provided with a dehumidification device for depression of
humidity within the chamber space.
10.5.1
Gen-gs (rev 12-16-12)
Desiccant Drier: Provide an automatic regenerative desiccant drier for operation at or
below a 10°C. (50°F.) chamber dewpoint. The drier housing shall be of welded
aluminum construction, with internal wall insulation. The drier shall have a
'HoneyCombe' desiccant wheel with silica gel, driven by a non-ratcheting desiccant
drive unit. The drier shall incorporate a stepless solid-state proportional heat controller
to maintain the reactivation air temperature through varying load conditions. The drier
shall have push-to-test indicators for mode of operation, on / off status, and high process
airflow. The drier shall have internal overcurrent protection devices and local
disconnecting means. Roughing filters shall be provided for the process and reactivation
airstreams. An access panel shall provide inspection or servicing inspection without
disconnecting ducting or electrical wiring. The chamber conditioning system shall be
sized to handle the full load heat from the desiccant drier, while maintaining setpoint
Page 12 of 20
within manufacturer's standard humidity control tolerance. The control of drying
capacity shall be through the touchscreen control system. The control system shall
proportion the amount of dry air flowing into the chamber by means of a spring return
proportional damper. The damper shall close and isolate the drier from the chamber in
the event of chamber shutdown, high chamber humidity, or manual disabling of the
dehumidification system. Reheat dehumidification (coil operation below 0°C) will not
be accepted.
10.5.2
Dehumidification Coil: Provide a refrigerated dehumidification coil for operation above
a 10°C. (50°F.) chamber dewpoint. The coil shall be designed as an integral part of the
evaporator plenum. This dedicated coil shall be housed inside of the ceiling
conditioning unit for proper condensate removal. The dehumidification coil shall be
provided with a pressure limiting valve to achieve a consistent dewpoint temperature
and prevent freezing of the coil. The control of drying capacity shall be through the
touchscreen control system. The control system shall modulate the dehumidification
coil refrigeration solenoid valve. Reheat dehumidification (coil operation below 0°C.)
will not be accepted.
10.5.3
Compressed Dry Air: Provide a compressed dry air system for operation at or below a
0°C (32°F) chamber setpoint. The system shall be provided with pre and post filtration,
pressure or flow regulation device, and control solenoid valve. The control of drying
capacity shall be through the touchscreen control system. The control system shall
modulate the dry air solenoid valve, and disable during chamber defrost events (as
applicable). Reheat dehumidification (coil operation below 0°C.) will not be accepted.
10.6
Piping and Insulation: The chamber piping and insulation shall be provided as specified below.
10.6.1
Refrigerant Piping: Piping carrying refrigerant shall be Type L ACR copper with copper
fittings. A brazing material of 15% sil-phos and/or 35-55% silver braze shall be used for
all joints.
10.6.2
Condensate Piping: Condensate drain lines on chambers above 0°C. shall be 7/8" OD
type copper tubing. On a chamber below 0°C., drain lines shall be Type L copper tubing
wrapped with heating cable and covered with closed-cell foam insulation. The cable
shall heat continuously below 0°C.
10.6.3
Condenser Water Piping (as applicable): Piping for condensing unit water shall be Type
L copper or black steel with malleable iron fittings.
10.6.4
Insulation: Suction and hot gas refrigeration lines, freezer drain lines, and condenser
inlet water lines (as applicable) shall be insulated with closed-cell foam plastic similar
to "Rubatex", "Armaflex" or equivalent. The insulation shall meet NFPA-90A flame
spread and smoke developed requirements. The material shall be tubular in form and
sized according to the pipe size. The insulation thickness shall be a minimum of 3/4".
Joints shall be thoroughly bonded by the adhesive recommended by the manufacturer of
the insulation. Insulation shall meet local and state fire and smoke requirements.
Penetrations of the insulation must be thoroughly sealed to form a complete vapor
barrier. Wherever the insulation terminates, the edges shall be sealed to the pipe with
sealant.
10.7
Pressure Testing: Factory and field pressure tested shall be performed.
Gen-gs (rev 12-16-12)
Page 13 of 20
10.7.1
Factory Testing: All sub-assemblies (condensing units, conditioning units, valve racks)
shall be pressurized at the factory with dry nitrogen, at a pressure no less than 175
PSIG, and held for 8 hours, monitoring as required with an electronic leak detector.
Upon successful test, the units shall be tagged with the dry nitrogen charge pressure,
temperatures, date, and testing technician's initials, then shipped with the "tagging"
procedure intact.
10.7.2
Field Testing: The field interconnecting piping shall be pressure tested at 150 PSIG, and
held for 24 hours, monitoring as required with an electronic leak detector. Upon
successful piping test, all piping shall be connected to all sub-assemblies (condensing
units, conditioning units, valve racks), and the previous pressure testing repeated. Upon
successful system test, the system shall be evacuated for no less than 12 hours to below
500 microns. The system shall then be isolated from the vacuum pump (blanked-off)
and monitored for pressure rise above 500 microns during a 20 minute duration. After
successful evacuation, the system shall be fully charged.
11.0
CHAMBER PERFORMANCE
11.1
Definitions: The following definitions apply to both parameters of temperature and humidity
(as applicable).
11.1.1
Control: The control of temperature is defined as the allowable variation from setpoint
as indicated by the process controller (touchscreen controller). The control of
temperature and relative humidity (as applicable) is based upon a single measuring
point located within the chamber usable space. 'Control' shall not be confused with
'uniformity', as defined below.
11.1.2
Uniformity: The uniformity is defined as the allowable variation from setpoint as
indicated by a multi-point recording device with multiple temperature sensor inputs.
Uniformity shall be defined as "volumetric", with measurements throughout the
chamber usable space and no closer than 12" to any wall, floor, conditioning unit, or
ceiling grid.
11.2
Performance: The following shall be required for chamber temperature and humidity (as
applicable):
11.2.1
Specified Temperature: As specified in the Project Outline
11.2.2
Specified Temperature Control Tolerance: ± 0.5°C. or better
11.2.3
Specified Temperature Uniformity Tolerance: As specified in the Project Outline
11.2.4
Specified Humidity: As specified in the Project Outline
11.2.5
Specified Humidity Control Tolerance: ± 1% RH or better
11.2.6
Specified Humidity Uniformity Tolerance: As specified in the Project Outline
11.2.7
Door Opening / Challenge: Following a fifteen (15) second door opening / challenge,
the chamber temperature shall recover to setpoint within five (5) minutes.
11.2.8
Defrost Temperature Rise: After an automatic defrost cycle (as applicable), the
temperature setpoint shall recover in less than 20 minutes.
Gen-gs (rev 12-16-12)
Page 14 of 20
11.3
Design Capacity: The refrigeration, heating, humidification, and dehumidification systems (as
applicable) shall be capable of maintaining the specifications as outlined in the Project Outline
without operation at full capacity more than 80% of the time under the following conditions:
11.3.1
Temperature surrounding the chamber shall be between 65°F. to 75°F. Relative
humidity surrounding the chamber shall be between 45% RH and 65% RH,
respectively.
11.3.2
The design loads shall accommodate personnel entering and leaving the chamber at the
rate of once per hour (one entry, one exit).
11.3.3
As required, the design loads shall accommodate an additional electrical load of five (5)
watts per sq.ft. of floor area. The additional heat load is for receptacles only, and is not
intended to represent the chamber lighting, ceiling conditioning unit, or any other
permanently installed electrical item.
12.0
INSTALLATION
12.1
The chamber manufacturer shall deliver and install the chamber and all conditioning
equipment to achieve performance as defined in the Project Outline. The chamber's
conditioning equipment, controls, lighting, and other internal electrical wiring shall be
interconnected by the chamber manufacturer's factory trained technicians or sub-contact
assistance under direct supervision of factory trained technicians. The chamber shall be started
and field-tested by the chamber manufacturer before project completion.
12.2
Chamber joints and openings shall be sealed, including penetrations for piping or electrical
wiring, in the outside and inside faces of walk-in refrigerated storage construction. At line of
support on other floor construction (outside and inside), seal with a formed cove of sealant or
other coved trim member.
12.3
Closure panels and strips shall be installed where chamber location results in a residual space
which is not of sufficient size to be cleaned or maintained. Seal joints and provide formed cove
of sealant or other coved trim member.
12.4
Mechanical, electrical and hardware components shall be adjusted as required prior to start-up.
All exposed surfaces shall be cleaned after installation.
12.5
Successful completion of work shall be decided by the owner, general contractor, or architect
involved in the project.
12.6
The chamber manufacturer shall provide a warranty as described in Section 5., which includes
maintaining with the specified tolerance the temperature and humidity (if applicable), and
providing construction free from defects due to faulty materials or workmanship.
13.0
13.1
CHAMBER ACCEPTANCE
Startup Checklist: After chamber installation, a factory prepared startup checklist shall be
followed. The checklist shall be completed by a factory trained technician only; subcontractors
will not be accepted. Specific requirements of the checklist shall be as follows:
Gen-gs (rev 12-16-12)
Page 15 of 20
13.1.1
Requirements of the specification or approved submittal and drawing(s) are met
13.1.2
Construction punchlist has been completed
13.1.3
Pressure and evacuation test has been completed
13.1.4
Required building utilities are verified as present and permanently connected
13.1.5
Mechanical and electrical connections are confirmed as secure
13.1.6
Electrical control panel wiring is verified as matching schematic(s)
13.1.7
Mechanical system components and piping are verified as matching schematics
13.1.8
Mechanical and electrical components are individually documented with model, serial
number, etc and verified as operational
13.1.9
Chamber is tuned at setpoint(s), with proper control and uniformity confirmed per
documented factory performed Field Test
13.1.10
Defrost, redundancy, and other special event actions are confirmed (as applicable)
13.2
Field Test: A multi-point datalogging recorder shall be used for a chamber field test, and shall
have been certified for accuracy by a nationally recognized testing laboratory within one year
prior to testing. Prior to the recorded test period, the chamber shall attain preset temperature
and humidity (as applicable) and show stability, with parameter(s) within the control tolerance
as per this specification. Tests shall be conducted at a temperature and humidity (as applicable)
selected and approved by the owner or representative. The field test, limited to that defined in
this section, shall be included in the contract cost.
13.2.1
Temperature Test: Tests shall be conducted using a minimum of sixteen (16) sensing
points located at widely separated points and recorded on a multi-point datalogger
(Fluke Hydra Logger or equivalent). Once during each test, the chamber door shall be
opened for fifteen (15) seconds. The chamber shall recover control and uniformity after
this disturbance. Test charts shall indicate; 1) control point setting, 2) date and time of
test start, 3) point where temperature and stabilization are achieved, 4) point where door
is opened, 5) signature and designation of individual conducting test, and 6)
manufacturer and serial number of datalogger. Each test shall be a minimum of eight (8)
hours in duration.
13.2.2
Humidity Test: Tests shall be conducted using a minimum of two (2) variable
capacitance / thin film humidity sensors located at opposing ends of the chamber and
recorded on a multi-point datalogger (Fluke Hydra Logger or equivalent). The sensors
shall have a nominal accuracy of ± 1.0%. The test shall follow the description above,
and shall be done in conjunction with the temperature test.
13.3
Qualification (as required): A qualification protocol shall be written and executed by the
chamber manufacturer, in cGMP format suitable for presentation to regulatory agencies. The
protocol shall provide the documentation necessary to support an Installation Qualification
(IQ), Operational Qualification (OQ), and Performance Qualification (PQ). The qualification,
limited to that defined in this section, shall be provided as a separate line item price.
13.3.1
Gen-gs (rev 12-16-12)
The manufacturer shall provide testing protocols prior to startup and testing for review
and approval by owner.
Page 16 of 20
13.3.2
The IQ test protocol shall demonstrate and document that chamber and associated
equipment is properly and safely installed and verifies the installed system matches the
submitted documentation.
13.3.2.1
Chamber construction material, dimensions, mechanical components,
instrumentation, electrical requirements, chamber accessories, and building
services/utilities shall be verified against submitted documentation.
13.3.2.2
Nameplate data on chamber enclosure, refrigeration, humidification,
dehumidification, and electrical equipment shall be verified and documented.
13.3.3
The OQ test protocol shall demonstrate and document that the chamber and associated
equipment complies and operates to the submitted documentation, as an unloaded
chamber.
13.3.3.1
The test protocol shall include documentation of control system functions,
including and not limited to alarms, safeties, and switchovers.
13.3.3.2
Process control and recording instrumentation shall be calibrated. Instrument
calibrations shall be NIST traceable.
13.3.3.3
The test protocol shall include documentation of temperature and humidity (as
applicable) uniformity within the chamber.
13.3.3.3.1 Testing is accomplished utilizing a multi-point datalogging recorder
(Kaye Validator, wireless sensors, or equivalent) certified within 12
months of the test date.
13.3.3.3.2 Tests shall be conducted at a temperature and humidity (as applicable)
selected and approved by the owner or representative.
13.3.3.3.3 The test protocol shall incorporate a minimum of twenty four (24)
temperature sensors, and minimum of four (4) variable capacitance
humidity sensors (as applicable). Temperature sensors shall be either
Type T thermocouple or wireless RTD.
13.3.3.3.4 The testing sensors shall be calibrated before testing (pre-cal).
Documentation of calibration shall be provided for each thermocouple
and humidity sensor.
13.3.3.3.5 Temperature and humidity sensors shall be located volumetrically
throughout the usable room volume, and shall be no closer than 12” to
any wall, ceiling, or floor. All sensors shall be named by unique
identifiers, with locations and names clearly shown on sensor location
diagrams.
13.3.3.3.6 Tests shall be conducted at a temperature and humidity (as applicable)
selected and approved by the owner or representative.
13.3.3.3.7 The test duration shall be a minimum of twelve (12) hours after chamber
stabilization.
13.3.3.3.8 The temperature and humidity readings (as applicable) shall be recorded
every one (1) minute during the time period. For redundant systems, the
test period shall be applied to System A (System B standby), and then to
System B (System A standby).
Gen-gs (rev 12-16-12)
Page 17 of 20
13.3.3.3.9 During the duration of testing, the chamber temperature and humidity
shall be verified to be within specified volumetric uniformity and without
alarms or faults during the duration.
13.3.4
13.3.4.1
The owner shall deliver all load to the room. The test period shall be repeated per
the OQ testing section.
13.3.4.2
The chamber door shall be opened for one (1) minute. The chamber shall recover
control and uniformity after this disturbance, with excursion time and limits
recorded and verified against validation criteria (only if applicable).
13.3.4.3
Once during each test period, the chamber power shall be switched off, to verify
all systems reset to last mode of operation and to verify control and uniformity is
reestablished.
13.3.4.4
The testing sensors shall be verified after testing (post-cal).
13.3.5
14.0
The PQ test protocol (as required) shall demonstrate and document that the chamber
and associated equipment complies and performs to the submitted documentation, as a
loaded chamber.
Final reports / documentation shall be presented to the customer at the conclusion of
testing.
13.3.5.1
The final summary report shall include the following information: (1) control point
setting, (2) date and time of test start, (3) minimum, maximum, and average for
temperature and humidity readings during each test, (4) color graphs for each test,
(5) door test data; time door is opened and closed, time sensors went out and
returned to specifications, (6) power off test data; time power is off and on, time
sensors went out and returned to specifications, (7) pre and post calibrations of
temperature and humidity sensors (as applicable), and (8) summary of all test
results. The data or charts will be clear, legible and with no overprinting.
13.3.5.2
The final documentation package shall include the following information: (1)
approval signature page, (2) completed Qualification Protocol, (3) IQ/OQ/PQ test
documents, (4) discrepancy forms/logs/comments, (5) records of calibration, (6)
calibration certificates for testing instrumentation, and (7) chart recorder graph(s)
(if applicable).
CHAMBER TURNOVER DOCUMENTATION AND TRAINING
14.1
Operation & Maintenance Manual: The chamber manufacturer shall provide the owner with
two (2) copies of an Operation & Maintenance Manual including the following:
14.1.1
Overview manual with full descriptions of all systems (mechanical, electrical, and
architectural), listing of control points and tolerances, and listing of all required
building services
14.1.2
Architectural, mechanical, and electrical schematics/drawings
14.1.3
Mechanical equipment cutsheets and associated operation manuals
14.1.4
Electrical / instrumentation cutsheets and associated operation manuals
Gen-gs (rev 12-16-12)
Page 18 of 20
14.1.5
Owner's instructions
14.1.6
Recommended spare parts lists
14.2
Master Manual: The chamber manufacturer shall provide the owner with one (1) copy of a
Master Manual including all information provided in the Operation & Maintenance Manual,
and additionally the following information, signed and dated as required:
14.2.1
Start-up checklist (full mechanical, electrical, architectural review)
14.2.2
Mechanical equipment field nameplate data sheets
14.2.3
Electrical equipment field nameplate data sheets
14.2.4
Evacuation & pressure testing forms
14.2.5
Owner's sign-off / acceptance forms
14.2.6
Thermocouple and humidity sensor (as applicable) mapping printouts
14.2.7
Chamber warranties
14.3
15.0
Owner's Training: Services of a factory-trained representative shall be made available for one
(1) day to provide instruction on the control system, review contents of the operation manual,
and to provide general instruction on the proper use and care of the chamber. Instruction shall
be provided by factory trained technicians only; sub-contractors will not be accepted.
BUILDING SERVICES AND UTILITY CONNECTIONS
15.1
General: Services and utility connections shall be provided to the point-of-use for final
connection by the chamber manufacturer. Required services and utilities are as indicated in the
Project Outline. The manufacturer of the chamber shall not be responsible for altering existing
building design and conditions or pulling in mechanical services for equipment.
15.2
Electrical: The electrical contractor or owner shall provide fused disconnects for each
condensing unit at a location as directed by chamber manufacturer. Other conditioning
equipment requiring disconnects by others shall be outlined by the chamber manufacturer, and
the required disconnects shall be provided by others. The chamber control panel and interior
receptacles shall require junction boxes by others as directed by chamber manufacturer. All
final connections to utility rough-in or disconnect shall be performed by the chamber
manufacturer.
15.3
Plumbing: The plumbing contractor or owner shall provide water supply and return to watercooled condensing units, water supply and drain site for humidification unit, all services and
connections to casework within chamber, and floor drain connections. All final connections
from shut off valves to equipment, except casework service and floor drain, shall be performed
by the chamber manufacturer.
15.4
Drain Site: As applicable, the chamber manufacturer shall run the ceiling evaporator
condensate drain line to a sink drain within the chamber, to a floor drain outside of chamber
within 10 feet, or through the chamber wall and terminated for connection by others.
Gen-gs (rev 12-16-12)
Page 19 of 20
15.5
16.0
Level Floor: The owner shall provide for the chamber manufacturer a level floor as a base for
the prefabricated chamber floor. The floor shall not exceed 1/4" in 10', and/or 1/8" in 2' span.
PROJECT OUTLINE
16.1
General Chamber Size and Conditions:
Room #
16.2
Temperature
Setpoint (C.)
Uniformity
Setpoint (C.)
Humidity
(% RH)
Uniformity
(% RH)
Exterior Dims.
(ft-in.)
Floor
Thick. (in.)
Interior Clear
Reqd. (ft-in.)
Ventilation
Rate (CFM)
Live Load
(W/sq ft or W)
General Chamber Conditioning Parameters:
Room #
Humidification
Dehumidification
Cooling
& Media
Evap.
Design
Occupants
Door
Opngs. (/hr)
Notes
16.2.1
Humidification: Steam generator/humidifier or Building steam, as applicable
16.2.2
Dehumidification: Desiccant drier or Dehumidification coil, as applicable
16.2.3
Cooling: Refrigeration (DX) or Chilled water (CHW), as applicable, and media: R404a, R-134a, 45 F. CHW, 28 F. CHW, as applicable
16.2.4
Evaporator Design: Unit cooler or Ceiling plenum, as applicable
16.2.5
Occupants: Number, considered as 10 minutes per hour
16.2.6
Door Openings: Number per hour, considered at a nominal 6 second duration
16.2.7
Ventilation Rate: CFM, considered as 15 CFM minimum per full time occupant, 0 CFM
for storage chambers and those with infrequent occupancy
16.2.8
Live Load: Heat load from electrical equipment, excluding all equipment already
provided as part of chamber
16.3
Building Conditions and Locations:
16.3.1
Chamber ambient (temperature and RH):
16.3.2
Ventilation air conditions (temperature and RH):
16.3.3
Condensing unit location, distance to chamber (feet):
16.4
Controls and Instrumentation:
16.4.1
Gen-gs (rev 12-16-12)
Temperature Control: Microprocessor based touchscreen control with 0.1 C. resolution
and LCD display
Page 20 of 20
16.4.2
Humidity Control (as applicable): Microprocessor based touchscreen control with 0.1 %
RH resolution and LCD display
16.4.3
Temperate Sensor: Platinum, 100 ohm 3-wire resistance temperature detector (RTD)
16.4.4
Humidity Sensor: Solid state, variable capacitance / thin-film sensor
16.4.5
High and Low Alarms: Touchscreen control adjustable, 0.1 unit resolution. Audible,
visual, and indicated through dry contacts, analogue DC, or Ethernet transmission
16.4.6
Defrost (as applicable): Touchscreen control adjustable, 0.1 unit resolution. Timed,
temperature-terminated, or 'adaptive' defrost
16.5
Chamber Accessories:
16.5.1
Shelving:
16.5.2
Casework:
16.5.3
Floor Covering:
16.5.4
Receptacles / Wiremold:
16.5.5
Lighting:
16.5.6
Sleeves / Access Ports:
16.5.7
Exhaust Fan / Make-Up Air Stubs:
16.5.8
Ceiling Grid:
16.6
Building Services:
16.6.1
Control Panel Power (V / PH / A):
16.6.2
Condensing Unit Power (V / PH / A):
16.6.3
Condensing Unit Water (as applicable) (GPH):
16.6.4
Humidifier Water (as applicable) (type, GPH):
16.6.5
Compressed Air (CFM, PSIG, dewpoint in deg. F.):
Gen-gs (rev 12-16-12)
Page 21 of 20