The unit shall be supplied with a (2 way) (3 way) (4 way) (ducted) air discharge plenum. The plenum shall be 18 in. (457mm) high, insulated and powder painted the same color as the room unit.
The manual disconnect switch shall be mounted in the high voltage section of the electrical panel. The switch shall be accessible with the door closed.
The manual disconnect switch shall be mounted in the high voltage section of the electrical panel. The switch shall be accessible from the outside of the unit with the door closed, and prevent access to the high voltage electrical components until switched to the “OFF” position.
The unit shall be supplied with remote temperature and humidity sensors. The sensors shall be con- nected to the unit by a 30 ft. (9m), 60 ft. (18m), 90 ft. (27m), 120 ft. (36m), 150 ft. (45m) shielded cable.
The firestat shall immediately shut down the system when high temperatures are detected. The firestat shall be mounted in the electrical panel with the sensing element in the return air.
The smoke detector senses the return air, shuts down the unit upon detection, and sends visual and audible alarm. Dry contacts are available for a remote customer alarm. This smoke detector is not intended to function as or replace any room smoke detection system that may be required by local or national codes.
The condensate pump shall have the capacity of ____
GPH (l/h) at ____ ft. (m) head @ ____ V - ____ Hz. It
shall be complete with (single) (dual) integral float switch, pump, motor assembly, and reservoir.
Direct Expansion Coil
The evaporator coil shall have _____ sq.ft. (sq. m) face
area, _____ rows deep. It shall be configured as (A)
(V)frame and be constructed of copper tubes and alu- minum fins and have a maximum face velocity of
_____ ft. per minute (m/s) at _____ CFM (CMH). The coil shall be provided with a stainless steel drain pan.
Refrigeration System
The refrigeration system shall consist of a high effi- ciency scroll compressor, hot gas bypass, pressure safety switches, externally equalized expansion
valve, filter drier, refrigerant sight glass and mois- ture indicator.
Pump Down Control
A liquid line solenoid valve shall be provided for pump down control.
Crankcase Heater
A crankcase heater shall be provided for additional system protection from refrigerant migration during off cycles.
Propeller Fan Condenser (Standard)
The Liebert manufactured air cooled condenser shall be the low profile, slow speed,
cooled condenser shall have a _____ Volt, _____ phase,
____ Hz power supply.
Fan Speed Control (FSC) Head Pressure Con- trol (Standard)
The winter control system for the air cooled con- denser shall be Liebert Fan Speed Control (FSC). The variable speed motor shall turn on at 10% of the supply voltage and modulate in response to head pressure to a full speed of 1050 RPM. It shall be designed with ball bearings, permanent lubrication, and internal overload protection.
The control system shall be complete with transduc- ers, thermostats and electrical control circuit, factory prewired and tested in an integral control panel. The transducer shall automatically sense the head pres- sure of the compressor and control the variable speed fan on the air cooled condenser to properly maintain the head pressure.
The fan speed control system shall provide positive
The winter control system for the air cooled con- denser shall be
(300)_____ Watt and require a separate power sup- ply of (115) (230) _____ Volt, single phase, _____ Hz.
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