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036-21359-001-B-0302
Unitary Products Group 17
ELECTRICAL REQUIREMENTS
All unit power wiring shall enter unit cabinet at a single
factory provided location and be capable of side or bot-
tom entry, to minimize roof penetrations and avoid unit
field modifications. Separate side and bottom openings
shall be provided for the control wiring.
STANDARD LIMITED WARRANTIES
Compressor- 5 Years
Heat Exchanger - 10 Years
Elect. Heat. Elem.- 5 Years
Parts- 1 Year
OPTIONAL OUTDOOR AIR (Shall be made available
by either/or):
1 ELECTRONIC ENTHALPY AUTOMATIC ECON-
OMIZER - Outdoor and return air dampers that are
interlocked and positioned by a fully-modulating,
spring-return damper actuator. The maximum leak-
age rate for the outdoor air intake dampers shall
not exceed 2% when dampers are fully closed and
operating against a pressure differential of 0.5
IWG. A unit-mounted potentiometer shall be pro-
vided to adjust the outdoor and return air damper
assembly to take in CFM of outdoor air to meet the
minimum ventilation requirement of the conditioned
space during normal operation. During economizer
operation, a mixed-air temperature control shall
modulate the outdoor and return air damper
assembly to prevent the supply air temperature
from dropping below 55°F. Changeover from com-
pressor to economizer operation shall be provided
by an integral electronic enthalpy control that feeds
input into the basic module. The outdoor intake
opening shall be covered with a rain hood that
matches the exterior of the unit. Water eliminator/
filters shall be provided. Simultaneous economizer/
compressor operation is also possible. Dampers
shall fully close on power loss.
2. DUAL INPUT DIFFERENTIAL ELECTRONIC
ENTHALPY AUTOMATIC ECONOMIZER -Out-
door and return air dampers that are interlocked
and positioned by a fully-modulating, spring-return
damper actuator. The maximum leakage rate for
the outdoor air intake dampers shall not exceed
2% when dampers are fully closed and operating
against a pressure differential of 0.5 IWG. A unit
mounted potentiometer shall be provided to adjust
the outdoor and return air damper assembly to take
in the design CFM of outdoor air to meet the mini-
mum ventilation requirement of the conditioned
space during normal operation. During economizer
operation, a mixed-air temperature control shall
modulate the outdoor and return air damper
assembly to prevent the supply air temperature
from dropping below 55°F. Changeover from com-
pressor to economizer operation shall be provided
by two integral electronic enthalpy controls - one
that senses outdoor air and one that senses indoor
air. Both enthalpy sensors supply input to the logic
module which modulates both sets of dampers for
maximum economizer savings. The outdoor intake
opening shall be covered with a rain hood that
matches the exterior of the unit. Water eliminator/
filters shall be provided. Simultaneous economizer/
compressor operation is also possible. Dampers
shall fully close on power loss.
3 MOTORIZED OUTDOOR AIR DAMPERS -Out-
door and return air dampers that are interlocked
and positioned by a 2-position, spring-return
damper actuator. The maximum leakage rate for
the outdoor air intake dampers shall not exceed
2% when dampers are fully closed and operating
against a pressure differential of 0.5 IWG. A unit-
mounted potentiometer shall be provided to adjust
the outdoor and return air damper assembly to take
in the design CFM of outdoor air to meet the venti-
lation requirements of the conditioned space during
normal operation. Whenever the indoor fan motor
is energized, the dampers open up to one of two
pre-selected positions - regardless of the outdoor
air enthalpy. Dampers return to the fully closed
position when the indoor fan motor is de-ener-
gized. Dampers shall fully close on power loss.
OTHER PRE-ENGINEERED ACCESSORIES AVAIL-
ABLE
1.
ROOF CURB - 14" high, full perimeter curb with
wood nailer (shipped knocked-down).
2.
BAROMETRIC RELIEF DAMPER -Containsarain
hood, air inlet screen, exhaust damper and mount-
ing hardware. Used to relieve internal air pressure
through the unit during economizer operation.
3.
PROPANE CONVERSION KIT - Contains new ori-
fices and gas valve parts to convert from natural to
L.P. gas. One per unit required.
4.
HIGH ALTITUDE - NATURAL GAS -Containsorifices
required for applications between 2000 and 6000
feet altitude.