Heat Controller R-410A installation instructions VI. Standard Unit Features 61⁄2 and 71⁄2

VI. STANDARD UNIT FEATURES — 61⁄2 AND 71⁄2

CABINET — Galvanized steel with a durable powder coat paint finish. The cabinet front and sides are formed into a one piece unitized design with stamped louvers to provide protection for the condenser coils.

SERVICE ACCESS — Control box with separation between line and control voltages, as well as compressor and other refrigerant controls are accessible through removable top and side panels (without affecting normal operation of unit).

Condenser fan motors are mounted on removable top panels which bring the motors out to you and expose entire condenser coil for cleaning.

COMPRESSOR — Hermetically sealed with internal high temperature protection and durable insulation on motor windings. The compressor is mounted on rubber grommets to reduce vibration and noise.

CONDENSER COILS — Constructed with copper tubes and aluminum fins mechanical- ly bonded to tubes for maximum heat transfer capabilities. All coil assemblies are leak tested.

REFRIGERANT CONNECTIONS — All field sweat joints are made external of the unit and are located close to the ground for a neat looking installation.

LOW AMBIENT CONTROL — A pressure sensitive fan cycling control allows operation of units down to to 0°F.

HIGH PRESSURE CONTROL — Manual reset control deactivates system if abnormally high pressure occurs.

LOW PRESSURE CONTROL — Automatic reset control deactivates system if abnor- mally low pressure or refrigerant loss occurs.

SERVICE VALVES — Standard on liquid line and suction line. Allows outdoor section to be isolated from indoor coil.

FILTER DRIER — Standard, field installed. Helps maintain system cleanliness.

CONDENSER FAN MOTORS — Direct-drive, PSC single-phase motors.

TRANSFORMER — Step down type, from Line to 24 volts. (Refer to Figure 2.)

CONTACTOR — (Refer to Figure 2.) The contactor is an electrical switch which oper- ates the compressor and condenser fans. Its 24 volt coil is activated through the High Pressure Control and Low Pressure Control on a call for cooling.

CAPACITORS — Help provide starting torque necessary to boost the condenser fan motors to operating speed by directing their stored energy to the starter winding in step with the running winding.

EQUIPMENT GROUND — Lug for field connection of ground wire.

TESTING — All units are run tested at the factory prior to shipment.

FIGURE 2	CAPACITOR	LOW AMBIENT
61⁄2 & 71⁄2 TON FEATURES		CONTROL

CONTROL

BOX

LOW VOLTAGE

CONNECTION

					HIGH VOLTAGE
					ENTRY
	COMPRESSOR CONTACTOR	CRANKCASE	SUCTION	LIQUID	LOW VOLTAGE
		HEATER	VALVE	VALVE	ENTRY
CONTROL TRANSFORMER		SCROLL	LOW	HIGH PRESSURE
			PRESSURE
	COMPRESSOR		SWITCH	SWITCH

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