Electrical Connections

It is recommended that a licensed electrician make all electrical connections. It is very important that the unit be properly grounded. It is recommended that a separate 15 amp/120 volt circuit be used.

WARNING: In order to prevent electric shock when cleaning or servicing the HRV, it is extremely important to confirm the polarity of the power line that is switched by the safety (disconnect) switch whose control arm is located on the outside of the electrical control box area. The hot line (black) is the proper line to be switched. To confirm the proper polarity, use a voltmeter or test lamp to make sure there is no power after the switch when the door is open. Check between that point and ground (on the cabinet). This must be done as occasionally some buildings are improperly wired. Always make sure the HRV is properly grounded.

 

Black

Power Supply

 

Line

 

Cord

 

White

Black

Neut.

 

 

 

 

Power

 

 

Terminal

 

 

Block.

 

 

 

GND.

Electrical Connection

 

DAMPER DEFROST

These damper defrost HRV’s have an electronically controlled damper defrost mechanism. If the outside temperature drops below 27˚F(-3˚C ), the defrost timer is activated. A motor driven damper door mechanism opens the defrost port and at the same time closes off the supply air from outside. After approximately 3 minutes, the damper operates in the opposite direction to close off the defrost port and reopen the fresh air at the supply port. The 27.5 minute wait time and 3 minute defrost cycle repeat until the temperature again rises above 27˚F (-3˚C).

Automatic Self Test of Defrost Systems

If confirmation of the defrost system is needed, complete the following steps.

1.Disconnect power to the unit and open access/ maintenance doors.

2.Locate the “snap disc” type temperature sensor mounted in the upper left hand corner (cold air stream) of the HRV.

3.Disconnect the two wires from the HRV to the sensor, at the sensor.

4.Using a jump wire with alligator clips, join two wires from the HRV together.

5.Close access doors and power the unit.

This procedure will simulate a defrost that would occur automatically in the field when the outside temperature drops below -3˚C (27˚F).

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Lifebreath 1000RHCAC, 1200DDPOOL, 700DDPOOL Electrical Connections, Automatic Self Test of Defrost Systems

1200DDPOOL, 700DDPOOL, 1000RHCAC, 1000RHC specifications

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