Change’Air Product Catalog
Version 1.10
Sophomore Series
For a complete catalog
contact your local representative.
Engineered Excellence for Greener Classrooms
NOTE: Change’Air reserves the right to make changes to Unit specifications without prior
notice. The performance of each Unit may vary based on site conditions and installation.
3.0 Sophomore Series
3.1
3.2
3.3.1
3.3.2
3.4
3.5
3.6
3.7
3.8
3.9
Features
Sophomore Series Cabinet Size Selection
Physical Data Tables (Cabinet “O”)
Physical Data Tables (Cabinet “P”)
Sophomore Series Air Source Heat Pump (ASHP)
Classroom Air Handler
Heating Options
Cooling Options
Power Relief
Energy Recovery
ASHP Energy Recovery Wheel
Sophomore Series
SELF CONTAINED A/C & AIR SOURCE HEAT PUMP
3.1 Features
The Change’Air Sophomore Series classroom air handler has a wide range of features. It is available in two of our cabinet
sizes (O & P ) with supply air capacities ranging from1000 to 2200 cfm.
standard features IN the Sophomore Series Include:
- Raised condenser intake design with a single wall penetration above a sill
- High efficiency design including ECM supply fan assembly
- Staged scroll compressors
- 2 to 5 ton capacities available with efficient R410a refrigerant
In addition to the standard features the Sophomore Series options includes:
- Air source heat pump operation
- Energy Recovery Wheel (ERW) with economizer damper
- Hot gas reheat for effective dehumidification
When cooling and heating is required and high efficiency is a priority, the Change’Air self-contained, packaged air source heat
pump may be the answer.
This is designed to standard CSA 22.2 NO. 236-05 UL 1995 certified by the Electrical Testing Laboratories (ETL) and bears
the label indicating it has been tested to the current safety standards for both the United States and Canada.
Standard ECM supply fan
assembly
Aluminum fresh
air dampers
Quiet and reliable modulating
spring return actuators
Condenser Fan(s)
Super quiet and efficient
staged scroll compressors
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3.0 Sophomore Series
Sophomore
3.2 Sophomore Series Cabinet Size Selection
“O” Cabinet
44
32
Basic Features, Design Options and
Capacities.
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High condenser intake cabinet
(44” x 32” x 91”)
Supply air up to 1600 CFM.
Primary or supplementary heating capacity
(Hot water up to 90 Mbtuh or two stage
Electric up to 15KW.
Optional air source heat pump operation.
Cooling capacity through self-contained A/C
with capacities from 24 to 36 Mbtuh.
(2, 2.5 or 3 Ton)
Standard condensing/relief fan option
Energy recovery wheel (ERW) with or without
an outside air economizer damper (optional
to only a standard outside air damper).
Hot gas reheat coil (optional).
Two step scroll compressors standard.
91
Insulation and Acoustics
The cabinet front incorporates two fully
insulated full size service panels. The
cabinet panels are thermally and
acoustically insulated with 1”(2.54 cm) thick
flexible acoustic insulation. This insulation
is covered in the air stream with a black
coated mat. The flexible, thermal and
acoustical liner includes the specification
compliance ASTM C1071, HN-1545B,
NFPA 90A and NFPA 90B.
“P” Cabinet
48
Basic Features, Design Options and
Capacities.
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High condenser intake cabinet
(48” x 32” x 91”)
Supply air up to 2200 CFM.
Primary or supplementary heating capacity
(Hot water up to 110 Mbtuh or two stage
Electric up to 15KW).
Optional air source heat pump operation.
Cooling capacity through self-contained A/C
with capacities from 42 to 60 Mbtuh.
(3.5, 4 or 5 Ton)
Standard condensing/relief fan option
Energy recovery wheel (ERW) with or without
an outside air economizer damper (optional
to only a standard outside air damper).
Hot gas reheat coil (optional).
Two step scroll compressors standard.
91
Cabinet Construction
Each cabinet is manufactured using
galvanized steel with a powder coat baked
enamel-textured finish. The internal frame
supports all the internal metal pans and
components so that the external panels do
not carry any of the weight. The external
cabinet panels are attached so that there
are no visible screws, rivets or fasteners.
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Enamel Finishes
Each cabinet has the highest quality,
powder coat baked enamel finish. For
architectural and design purposes,
Change’Air provides three standard colors:
white, antique white, and gray.
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3.0 Sophomore Series
3.3.1 Physical Data Table - Cabinet “O”
2, 2.5 & 3.0 Ton
SOPHOMORE “O” CABINET
OPTIONS
PRIMARY
OR
SUPPLEMENTARY
ELECTRIC HEAT (E)
HEATING
HOT WATER COIL (H)
OPTIONAL
HEAT PUMP
HEATING
AIR SOURCE
HEATING CAPACITY
COOLING
SELF-CONTAINED
COOLING CAPACITY
VALUE OR CAPACITY
RELIEF FANS
ECM
AC CENTRIFUGAL FANS
FILTERS
SUPPLY
DESIGNATION
DESIGNATION
Low Capacity(LC)
10KW
12KW
15KW
16” X 26”, 1 row 55 Mbtuh
16” X 26”, 2 row 90 Mbtuh
2.0 Ton
2.5 Ton
3.0 Ton
Standard Capacity(SC)
High Capacity(HC)
Standard Capacity (SC)
Standard Capacity (HC)
Nominal 24 Mbtuh (AHP)
Nominal 30 Mbtuh (AHP)
Nominal 36 Mbtuh (AHP)
Nominal 24 Mbtuh (RCI)
Nominal 30 Mbtuh (RCI)
Nominal 36 Mbtuh (RCI)
2.0 Ton
2.5 Ton
3.0 Ton
SUPPLY FANS
COMPATIBILITY TABLE
Standard Capacity SC-D - ½ hp (2 fan bodies)
High Capacity HC-D - 3/4 hp (2 fan bodies)
1200 cfm
1400 cfm
250 - 1600 cfm
(2) 1” Disposable
(2) 2” Disposable
Relief fan option using condensing fans
18” x 18”
(2) Permanent Washable
“B”
“C”
“D”
“E”
18” x 18”
18” x 18”
YES
SUPPLY
VOLTAGES
208/3/60
208-230/1/60
277/1/60
460/3/60
HOT GAS REHEAT
All Models
YES
YES
ENERGY RECOVERY WHEEL
(no economizer)
All Models
YES
ENERGY RECOVERY WHEEL
(with economizer)
All Models
YES
YES
YES
AIR FLOW DESIGN
Draw Through Heating
YES
WEIGHT
2 & 2.5 Ton
3.0 Ton
850 lb
875 lb
All weights are calculated on the maximum available options.
Performance: rated in accordance with AHRI Standard 390 (Formerly ARI Standard 390)
1 - Cooling capacity rated at standard conditions - 80/67°F indoor air, 95°F outdoor air
2 - Heating capacity rated at standard conditions - 70°F indoor air, 47/43°F outside air
NOTE: Change’Air reserves the right to make changes to air handler specifications without prior notice. The performance of each air
handler may vary based on site conditions and installation.
3.0 Sophomore Series
3.3.2 Physical Data Table - Cabinet “P”
3.5, 4.0, 5.0 Ton
SOPHOMORE “P” CABINET
OPTIONS
PRIMARY
OR
SUPPLEMENTARY
ELECTRIC HEAT (E)
HEATING
HOT WATER COIL (H)
OPTIONAL
HEAT PUMP
HEATING
AIR SOURCE
HEATING CAPACITY
COOLING
SELF-CONTAINED
COOLING CAPACITY
VALUE OR CAPACITY
RELIEF FANS
ECM
AC CENTRIFUGAL FANS
FILTERS
SUPPLY
DESIGNATION
DESIGNATION
Low Capacity(LC)
10KW
12KW
15KW
16” X 30”, 1 row 70 Mbtuh
16” X 32”, 2 row 110 Mbtuh
3.5 Ton
4.0 Ton
5.0 Ton
Standard Capacity(SC)
High Capacity(HC)
Standard Capacity (SC)
Standard Capacity (HC)
Nominal 42 Mbtuh (AHP)
Nominal 48 Mbtuh (AHP)
Nominal 60 Mbtuh (AHP)
Nominal 42 Mbtuh (RCI)
Nominal 48 Mbtuh (RCI)
Nominal 60 Mbtuh (RCI)
High Capacity HC-D - 3/4 hp (2 fan bodies)
3.5 Ton
4.0 Ton
5.0 Ton
SUPPLY FANS
COMPATIBILITY TABLE
1800 cfm
2200 cfm
Extra High Capacity XHC-D - 1 hp (2 bodies)
250 - 1600 cfm
(2) 1” Disposable
(2) 2” Disposable
Relief fan option using condensing fans
18” x 18”
18” x 18”
(2) Permanent Washable
“B”
“C”
“D”
“E”
18” x 18”
YES
YES
YES
SUPPLY
VOLTAGES
208/3/60
208-230/1/60
277/1/60
460/3/60
HOT GAS REHEAT
All Models
YES
YES
ENERGY RECOVERY WHEEL
(no economizer)
All Models
YES
ENERGY RECOVERY WHEEL
(with economizer)
All Models
YES
AIR FLOW DESIGN
Draw Through Heating
WEIGHT
3.5 & 4.0 Ton
5.0 Ton
YES
920 lb
950 lb
All weights are calculated on the maximum available options.
Performance: rated in accordance with AHRI Standard 390 (Formerly ARI Standard 390)
1 - Cooling capacity rated at standard conditions - 80/67°F indoor air, 95°F outdoor air
2 - Heating capacity rated at standard conditions - 70°F indoor air, 47/43°F outside air
NOTE: Change’Air reserves the right to make changes to air handler specifications without prior notice. The performance of each air
handler may vary based on site conditions and installation.
Sophomore
3.0 Sophomore Series
3.4 Sophomore Series Packaged A/C
and Air Source Heat Pump Classroom
Air Handler (Raised Condenser Intake)
Supply Fan
Fig.4b
The Sophomore Series raised condenser
intake design achieves maximum
efficiency through its many unique
features. This self contained cooling
system can easily be upgraded to an air
source heat pump so that it can be used
effectively in the heating season by
reversing the refrigerant flow. If required,
additional supplementary heat can be
added with electric, hot water or steam
making the Sophomore extremely
flexible.
Evaporator Coil
Outside Air Damper
Condensing Coil &
Scroll Compressor
Compartment
Standard features include staged
compressors, power relief of room air
using the condensing fans and EC
supply fan motor. Additional options
available include an energy recovery
wheel (ERW) with or without an outside
air economizer damper, or hot gas reheat
coil for dehumidification.
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3.5 Heating Options
3.6 Cooling Options
AIR SOURCE HEAT PUMP
The Sophomore Series (ASHP) has primary heating available
through an air source heat pump. The capacities range from 2
to 5 ton and all units include quality two stage scroll
compressors as standard equipment.
Safety features included are an automatic high pressure
switch, evaporator freeze protection and line dryers to ensure
a long operating life.
The Sophomore Series (RCI) has the self-contained A/C to
achieve efficient cooling. The capacities range from 2 to 5
ton and all units include quality two stage scroll compressors
as standard equipment.
Safety features included are an automatic high pressure
switch, evaporator freeze protection and line dryers to ensure
a long operating life. Other features are items such as a
condensing coil pre-filter along with optional stainless steel or
insulated drain pans and other cooling upgrades.
HOT WATER HEAT SOURCE:
The hot water heating coil is constructed in an air over water
configuration and provides either primary or supplementary
heat by way of a fin tube water coil. Built to dependable,
design conscious standards all our coils have a self closing
bleeder to facilitate start-up. Valve packages are available
factory installed for a simple site startup.
ELECTRIC HEAT SOURCE:
Electric heat source as primary or supplementary heat
consists of multi-stage electric resistance elements offered in
several voltage/phase and kilowatt configurations. They come
integral to the unit and are located on the leaving side of the
evaporator.
3.7 Power Relief
The Sophomore Sereis includes the option of using the
condensing fans as power relief for stale room air. The
balancing dampers direct airflow from the room out through
the condensing fans at the same rate as the supply fan is
drawing outside air into the unit. The condensing fans
operate at multiple adjustable speeds and in mechanical
cooling operation the mixed room and outside air being
drawn across the outside air coil moderate the temperature
adding efficiency to the system.
3.8 Energy Recovery
An energy recovery wheel is available as an option and
compatible with all other features. It is a 19” diameter wheel
1" or 2” thick and is available with or without an outside air
damper providing additional un-recovered fresh air or
economizer cooling when applicable. A typical application of
450cfm would have an effective recovery rate of 63.8% in
cooling season and 66.4 % in heating season.
3.0 Sophomore Series
Sophomore
3.9 ASHP Energy Recovery Wheel
Energy recovery wheels (ERW) rotate through both the outside incoming air stream and the relief air stream. As the wheel
rotates, it transfers a portion of the sensible and latent energy from one air stream to the other. As a result the incoming air
stream is pre-conditioned reducing the thermal gradient across the conditioning equipment thereby reducing energy
consumption.
Fig.4c
Supply Air
Summer Conditions
Supply Air
Outdoor Air
95°F DB
78°F WB
81°F DB
68°F WB
Cooling Coil
Mixed Air
Return Air
Relief Air
Outside Air Damper (on
Energy Recovery Wheel
Section Only)
89°F DB
73°F WB
75°F DB
63°F WB
Heating Coil
Energy
Recovery
Wheel
Outside Air
Fig.4d
Exhaust/Relief Air
Winter Conditions
Supply Air
53°F DB
40°F WB
Outdoor Air
7°F DB
6°F WB
Condenser Coil
Return Air
Return Air
72°F DB
54°F WB
Relief Air
Floor Level
27°F DB
20°F WB
Ground Level
Effectiveness (%)
SCFM
350
S
L
T
Clg
74.1
66.1
69.6
ΔP
T
Htg
(in.w.c)
71.2
0.42
400
72.1
64.1
67.7
69.2
0.48
450
70.1
62.1
65.7
67.2
0.54
Rated in accordance with ARI Standards 1060
Manufactures Recommended Cleaning
Wash the segments or small wheels with a non-acid based (evaporator) coil cleaner or alkaline detergent solution. Non-acid
based coil cleaner such as KMP Acti-Clean AK-1 concentrate in a 5% solution has been demonstrated to provide excellent
results. Do not use acid based cleaners, aromatic solvents, temperatures in excess of 170 °F or steam; damage to the wheel
may result. Soak in the cleaning solution until grease and tar deposits are
loosened. An overnight soak may be required to adequately loosen heavy deposits of tar and oil based contaminants.
NOTE: Change’Air reserves the right to make changes to the specifications without prior notice. The performance may
vary based on site conditions and installation.