254595-YTG-C-0308
Johnson Controls Unitary Products
33
service. Units with Electric Heating shall be wired for a single
point power supply with branch circuit fusing (where
required).
UNIT OPERATING CHARACTERISTICS
a.
Unit shall be capable of starting and running at
125°F outdoor temperature, exceeding maximum
load criteria of ARI Standard 210/240. The compres-
sor, with standard controls, shall be capable of oper-
ation down to 0°F outdoor temperature. Unit shall be
provided with fan time delay to prevent cold air
delivery before heat exchanger warms up (Gas heat
only).
ELECTRICAL REQUIREMENTS
All unit power wiring shall enter unit cabinet at a single factory
provided location and be capable of side or bottom 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
•
Electric Heat Element 5 Years
•
Other Parts 1 Year
OPTIONAL OUTDOOR AIR
(Shall be made available by
either/or):
•
ELECTRONIC ENTHALPY AUTOMATIC ECONO-
MIZER
- Outdoor and return air dampers that are inter-
locked 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 potenti-
ometer shall be provided to adjust the outdoor and return
air damper assembly to take in CFM of outdoor air to
meet the minimum ventilation requirement of the condi-
tioned space during normal operation. During econo-
mizer 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 compressor to economizer oper-
ation shall be provided by an integral electronic enthalpy
control that feeds input into the basic module. The out-
door intake opening shall be covered with a rain hood
that matches the exterior of the unit. Water eliminator/fil-
ters shall be provided. Simultaneous economizer/com-
pressor operation is also possible. Dampers shall fully
close on power loss.
•
MOTORIZED OUTDOOR AIR DAMPERS
- Outdoor air
dampers are positioned by a 2-position, spring-return
damper actuator. The maximum leakage rate for the out-
door air intake dampers shall not exceed 2% when
dampers are fully closed and operating against a pres-
sure differential of 0.5 IWG. A unit-mounted potentiome-
ter shall be provided to adjust the outdoor damper
assembly to take in the design CFM of outdoor air to
meet the ventilation 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-energized. Dampers
shall fully close on power loss.
OTHER PRE-ENGINEERED ACCESSORIES AVAILABLE
•
ROOF CURB
- 14" and 8” high, full perimeter curb with
wood nailer (shipped knocked-down).
•
BAROMETRIC RELIEF DAMPER
- Contains a rain
hood, air inlet screen, exhaust damper and mounting
hardware. Used to relieve internal air pressure through
the unit.
•
POWER EXHAUST OPTION
- To work in conjunction
with economizers.
•
ELECTRIC HEATERS
•
ECONOMIZER/MOTORIZED DAMPER RAIN HOOD
-
Contains all hood panels and the hardware for assem-
bling.
•
MANUAL OUTDOOR AIR DAMPER
•
COIL GUARD KIT
- Guard for cooling coil.
•
HAIL GUARD
OTHER FACTORY INSTALLED OPTIONS
•
POWER EXHAUST OPTION
- To work in conjunction
with economizers.
•
TECHNICOAT PHENOLIC COATED CONDENSER
AND EVAPORATOR COIL
•
ELECTRONIC SINGLE ENTHALPY ECONOMIZER
•
DIRTY FILTER SWITCH
•
PHASE MONITOR
•
COIL GUARD
•
POWERED GFI CONVENIENCE OUTLET
•
NON-POWERED GFI CONVENIENCE OUTLET
