Specifications

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The Smart Choice for Energy Efficiency
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he Smart Choice for Energ
Option: The unit will be supplied with internally factory mounted automatic water fl ow regulators.
Option: The unit will be supplied with internally mounted secondary pump for primary/secondary applications.
Cabinet Drain Pan:
The drain pan shall be constructed of galvanized steel and have a powder coat paint application to further inhibit corrosion.
This corrosion protection system shall meet the stringent 1000 hour salt spray test per ASTM B117. If plastic type material is
used, it must be HDPE (High Density Polyethylene) to avoid thermal cycling shock stress failure over the lifetime of the unit.
Stainless Steel materials are also acceptable. Drain pan shall be fully insulated. Drain pan shall have at a minimum a doubled
sloped surface to allow positive drainage to the outlet opening, which shall be at the lowest level of the entire pan suface. Drain
outlet shall be connected from pan outlet to condensate riser (if supplied) with factory installed trap inside of cabinet. The unit
as standard will be supplied with solid-state electronic condensate overfl ow protection. Mechanical fl oat switches will NOT be
accepted.
Electrical:
A control box shall be located within the unit compressor compartment and shall contain a 50VA transformer, 24 volt activated,
2 or 3 pole compressor contactor, terminal block for thermostat wiring and solid-state controller for complete unit operation.
Reversing valve and fan motor wiring shall be routed through this electronic controller. Units shall be name-plated for use with
time delay fuses or HACR circuit breakers. Unit controls shall be 24 Volt and provide heating or cooling as required by the
remote thermostat / sensor.
Option: Disconnect Switch, Non-Fused
Option: Circuit Breaker
Solid State Control System (CXM):
Units shall have a solid-state control system. Units utilizing electro-mechanical control shall not be acceptable. The control
system microprocessor board shall be specifi cally designed to protect against building electrical system noise contamination,
EMI, and RFI interference. The control system shall interface with a heat pump type thermostat. The control system shall have
the following features:
a. Anti-short cycle time delay on compressor operation.
b. Random start on power up mode.
c. Low voltage protection.
d. High voltage protection.
e. Unit shutdown on high or low refrigerant pressures.
f. Unit shutdown on low water temperature.
g. Condensate overfl ow electronic protection.
h. Option to reset unit at thermostat or disconnect.
i. Automatic intelligent reset. Unit shall automatically reset the unit 5 minutes after trip if the fault has cleared. If a fault occurs
3 times sequentially without thermostat meeting temperature, then lockout requiring manual reset will occur.
j. Ability to defeat time delays for servicing.
k. Light emitting diode (LED) on circuit board to indicate high pressure, low pressure, low voltage, high voltage, low water/air
temperature cut-out, condensate overfl ow, and control voltage status.
l. The low-pressure switch shall not be monitored for the fi rst 120 seconds after a compressor start command to prevent
nuisance safety trips.
m. 24V output to cycle a motorized water valve or other device with compressor contactor.
n. Unit Performance Sentinel (UPS). The UPS warns when the heat pump is running ineffi ciently.
o. Water coil low temperature sensing (selectable for water or anti-freeze).
p. Air coil low temperature sensing.
NOTE: Units not providing the 8 safety protections of anti-short cycle, low voltage, high voltage, high refrigerant
pressure, low pressure (loss of charge), air coil low temperature cut-out, water coil low temperature cut-out, and
condensate overfl ow protections will not be accepted.