ACME ENGINEERING &
MANUFACTURING CORP.
P.O. BOX 978
Muskogee, OK 74402
Phone: 918/682-7791
Fax: 800/382-2263
acmehort@thefanpeople.com
www.acmehort.com
SEMS-1
STANDARD GREENHOUSE APPLICATION
• FAN-JET OR HAF
• BENCH HEATER
• TWO STAGES OF OVERHEAD VENT
• 2 EXHAUST FANS INCLUDING ONE 2 SPEED
• GABLE SHUTTER (FIRST COOLING STAGE)
• SHUTTER OR END VENT AIR INLET
• EVAPORATIVE PAD COOLING SYSTEM
BENEFITS
• EASY INSTALLATION
• EASY SET-UP
• EASY OPERATION
• RUGGED LONG LIFE
The Standard EMS is designed to control
the basic greenhouse. The SEMS comes
completely configured and wired ready for
mounting on the wall.
FEATURES
• ACC I ENVIRONMENTAL CONTROLLER
• 10 POWER RELAYS
• BYPASS SWITCHES FOR POWER RELAYS
• SAFE 24 VAC CONTROL WIRING
• PREWIRED AT FACTORY
• TEMP. SENSOR WITH 75’ CABLE
• PHOTOCELL OPTION
• DEHUMIDIFICATION OPTION
• SEALED FIBERGLASS ENCLOSURE
• ENVIRONMENTALLY PROTECTED
• HINGED ENCLOSURE FOR EASY ACCESS
The SEMS is a complete station for environmental control. The computer used in this system is the ACC I. This
is set up with 3 Heating stages and 4 Cooling stages. The temperature can be monitored with up to 500 feet
between the sensor and the controller. A convenient front panel display shows the current room temperature
alternating with a display of the stage in operation. The SET POINT or ideal temperature can be easily input or
displayed from the front panel. Optional features include the night time temperature set back, dehumidification
control and cooling lockout. An optional photocell is used to switch the night time heating temperature to a lower
setting. By adding an optional humidistat to the ACC I, the first cooling stage can be operated during SET
POINT to exhaust humid air. Stages above the second cooling stage can be locked out on sunny cold days with
the addition of an optional external temperature sensor. The Computer automatically sequences the stages
when powered up. This feature minimizes the TURN ON current surges by gradually stepping the equipment on
after a power failure. All settings are automatically saved during a power outage.
The controller is wired to a set of power relays designed to operate the greenhouse equipment. In an
emergency, any power relay may be bypassed and the corresponding equipment energized using the
AUTO/OFF/ON switch located inside the enclosure. The enclosure is a waterproof gasketed fiberglass box
designed to be mounted inside of your greenhouse. The unit is set up with staging as shown in Table 1. At each
temperature stage specific pieces of equipment are designed to be actuated this computer will operate the
building from turning on up to 3 heating systems on a cold winter day to the operation of two exhaust fans and an
evaporative cooling system on the warmest summer day.
CONTROLS
FORM B160B
September 2000
SEMS-1 SPECIFICATIONS AND DETAILS
Input Voltage
120 VAC 50/60 Hz
Input Circuit Breaker
15A Recommended
SPST (single pole single throw
Rating
1 HP 120 VAC
Number
One per output relay
Type
DPDT (double pole double throw)
Rating
Function
Disconnect
Switches
11/2 HP 240 VAC
11/2 HP 2 Pole 120 VAC
2 HP 2 Poles 240 VAC
H3
Auto/Off/On Switch completely disconnects
power relay from the circuit in the manual
(Off/On) mode.
H2
Number
One per output relay
Type
DPDT (double pole double throw)
Rating
11/2 HP 2 Pole 120 VAC
2 HP 2 Poles 240 VAC
Function
Auto/Off/On Switch completely disconnects
power relay from the circuit in the manual
(Off/On) mode.
Control Voltage
24 VAC 100 VA Transformer
Temp Sensor
Solid State with 75 feet of cable
Enclosure
Heavy Fiberglass with Gasketed Door.
Full Length Stainless Steel Hinge
Quick Connect Stainless Steel Latches
H1
X
X
X
X
X
X
X
X
X
SP
C1
SIDE VENT / SHUTTER
Type
FAN #2
1
PUMP #1
Output Relay R52
Number
FAN #1 (LOW)
N.C. 3A
Output Relay R52
FANFET / HAP
N.O. 3HP 220 VAC
HEATER #1
N.O. 1HP 120 VAC
GABLE SHUTTERS
DPDT (double pole double throw)
Rating
HEATER #2
8
Type
HEATER #3
Number
FAN #1 (LOW TO HIGH)
Output Relays
R11-R42
CONTROLLER
OUTPUT
STAGE
X
X
X
X
C2
X
X
C3
X
X
X
C4
X
X
X X X
X
X
X
TABLE 1
Lockable
Rain and Dust Tight
Mounting
Exterior Brackets Designed wall mounting
using #14 (1/4) screws or bolts (by others)
Controller
ACC I 8 stage µP based Controller
LIMITED WARRANTY Acme Engineering
and Manufacturing Corporation warrants the
products manufactured by Acme to be free
from original defects in workmanship and
material for two years subject to the terms
and conditions of its published limited
warranty. Warranties on purchased products
are subject to the vendor’s warranty. Refer to
current Form MS149 for complete limited
warranty terms and conditions.
WARNING Acme products are designed and
manufactured
to
provide
reliable
performance but they are not guaranteed to
be 100% free of defects. Even reliable
products will experience occasional failures
and this possibility should be recognized by
the User. If these products are used in a life
support ventilation system where failure
could result in loss or injury, the User should
provide adequate back-up ventilation,
supplementary natural ventilation or failure
alarm system, or acknowledge willingness to
accept the risk of such loss or injury.
WARNING DO NOT use in HAZARDOUS
ENVIRONMENTS where fan’s electrical
system could provide ignition to combustible
or flammable materials unless unit is
specifically built for hazardous environments.
DISCLAIMER The Company has made a diligent
effort to illustrate and describe the products in this
literature accurately; however, such illustrations
and descriptions are for the sole purpose of
identification, and do not express or imply a
warranty that the products are merchantable, or fit
for a particular purpose, or that the products will
necessarily conform to the illustrations or
descriptions or dimension.
CAUTION Guards must be installed when
fan is within reach of personnel or within
seven (7) feet (2.134 m) of working level or
when deemed advisable for safety.
The products on this brochure are covered by a
limited warranty. For a complete copy of the
warranty statement, see form MS149 or write to
Acme Engineering and Manufacturing Corp.
July 2000
Form B160 Rev. B