257098-BTG-A-0506
Unitary Products Group
3
PRODUCT NOMENCLATURE
FEATURES
All units are self-contained and assembled on full perimeter
base rails with forklift holes on three sides and holes for over-
head rigging. Every unit is completely piped, wired, charged
and tested at the factory to simplify the field installation and to
provide years of dependable operation.
All models (including those with an economizer) are suitable
for either bottom or horizontal duct connections. For bottom
duct, remove the sheet metal panels from the supply and
return air openings through the base of the unit. For horizon-
tal duct, remove the supply and return air panels on the rear
of the unit.
All models are available with the “factory mounted” outdoor
air damper option:
•
Single enthalpy economizer
Supply air blowers are equipped with either a direct drive or a
belt drive that can be adjusted to meet the exact require-
ments of the job.
All compressors are equipped with internal pressure relief.
Every refrigerant circuit includes a liquid line filter-drier, a high
pressure switch and a suction line with a freezestat and low
pressure/loss of charge switch to protect all system compo-
nents.
•
Control boards have standardized a number of features
previously available only as options or by utilizing addi-
tional controls.
•
Low Ambient
- An integrated low-ambient control
allows all units to operate in the cooling mode down
to 0ºF outdoor ambient without additional assis-
tance. Optionally, the control board can be pro-
grammed to lockout the compressors when the
outdoor air temperature is low or when free cooling
is available.
•
Anti-Short Cycle Protection
- To aid compressor
life, an anti-short cycle delay is incorporated into the
standard controls. Compressor reliability is further
ensured by programmable minimum run times. For
testing, the anti short cycle delay can be temporarily
overridden with the push of a button.
•
Fan Delays
- Fan on and fan off delays are fully pro-
grammable and are independent of one another. All
units are programmed with default values based
upon their configuration of cooling and heat.
•
Safety Monitoring
- The control board monitors the
high and low-pressure switches, the freezestats, the
gas valve, if applicable, and the temperature limit
switch on gas heat units. The unit control board will
alarm on ignition failures, compressor lockouts and
repeated limit switch trips.
•
Nuisance Trip Protection
- To prevent nuisance
trouble calls, the control board uses a “three strikes,
you’re out” philosophy. The high and low-pressure
switches and the freezestats must trip three times
within two hours before the unit control board will
lock out the compressor.
•
On Board Diagnostics
- Each alarm will energize a
trouble light on the thermostat, if so equipped, and
flash an alarm code on the control board LED. Each
high and low-pressure switch alarm as well as each
freezestat alarm has its own flash code. The control
board saves the five most recent alarms in memory,
and these alarms can be reviewed at any time.
Alarms and programmed values are retained
through the loss of power.
All units have long lasting powder paint cabinets with 1000
hour salt spray test approval under ASTM-B117 procedures.
All models are CSA listed.
B
D
C
B
A
PRODUCT GENERATION
D = Fourth Generation
E = Fifth Generation
F = Sixth Generation
PRODUCT CATEGORY
B = Single Package Heat Pump
(Air Cooled)
PRODUCT IDENTIFIER
CB = Heat Pump
VOLTAGE CODE
-T = 208/230-3-60
-W = 460-3-60
-X = 575-3-60
036 = 3 Ton
048 = 4 Ton
060 = 5 Ton
3
0
6
-
T
FACTORY INSTALLED HEAT
A = No Supplemental Heat
NOMINAL COOLING CAPACITY
