OUTDOOR (CONDENSER) FAN ASSEMBLY
The outdoor fans shall be of the
REFRIGERANT COMPONENTS
Compressors:
a. Shall be Scroll compressors internally protected with internal
b.Shall have internal spring isolation and sound muffling to minimize vibration and noise, and be externally isolated on a dedicated, independent mounting.
Coils:
a. Evaporator and condenser coils shall have aluminum plate fins mechanically bonded to seamless internally enhanced copper tubes with all joints brazed. Special Phenolic coating shall be available as a factory option.
b. Evaporator and Condenser coils shall be of the direct expansion,
Refrigerant Circuit and Refrigerant Safety Components shall include:
a.
b. Filter drier/strainer to eliminate any moisture or foreign matter.
c. Accessible service gage connections on both suction and discharge lines to charge, evacuate, and measure refrigerant pressure during any necessary servicing or troubleshooting, without losing charge.
d. The refrigeration system shall provide at least 10° F of
e.All models shall have two independent circuits.
f.Hot gas bypass option shall be
UNIT CONTROLS
a. Unit shall be complete with
b. Unit shall incorporate a lockout circuit which provides reset capability at the space thermostat or base unit, should any of the following standard safety devices trip and shut off compressor.
c.
1.
2.
d.Unit shall incorporate "AUTO RESET" compressor over temperature, over current protection.
e.Unit shall operate with conventional thermostat designs and have a low voltage terminal strip for easy
f.Unit control board shall have
g.Standard controls shall include
0°F.
h.Control board shall monitor each refrigerant safety switch independently.
i.Control board shall retain last 5 fault codes in non volatile memory, which will not be lost in the event of a power loss.
GAS HEATING SECTION (WR***N MODELS)
Shall be designed with induced draft combustion with post purge logic and energy saving direct spark ignition, redundant main gas valve. Ventor wheel shall be constructed of stainless steel for corrosion resistance. The heat exchanger shall be of the tubular type, constructed of
a.Primary and auxiliary
b.Induced draft motor speed sensor.
c.Flame roll out switch (automatic reset).
d.Flame proving controls. Unit shall have two independent stages of capacity.
ELECTRIC HEATING (WR***C/E MODELS)
Nickel chromium electric heating elements shall be provided as required by the application with 1 or 2 stage control, as required, from 13.5 KW to 72 KW capacities. The heating section shall have a primary limit control(s) and automatic reset to prevent the heating element system from operating at an excessive temperature. Units with Electric Heating shall be wired for a single point power supply with branch circuit fusing (where required).
54 | Unitary Products Group |