Automated Defrost; Wiring; Terminal Description - Honeywell TrueFRESH ERV/HRV Série Guide D'installation

Automated Defrost

The ERV and HRV units are equipped with an automatic defrost feature to eliminate any ice build up on the core.
• Automatic defrost is initiated once every hour when the fresh air supply temperature drops to 23°F (-5°C) or
colder.
• The defrost cycle operates by turning off the supply fan while continuing to operate the exhaust fan.
• The exhaust fan speed is adjusted proportionally based on the outdoor temperature, initially operating at low
speed.
• As the outdoor temperature continues to drop, the exhaust fan speed will increase, and will operate at
maximum speed when the outdoor temperature is -4°F (-20°C) or less.
• The VNT5070 Series HRV/ERV defrost cycle runs for 5 minutes with the supply fan off followed by 35 minutes
of continuous normal operation.
• The VNT5150 Series HRV/ERV defrost cycle runs for 5 minutes with the supply fan off followed by 35 minutes
of continuous normal operation.
• The VNT5200 Series HRV/ERV defrost cycle runs for 4 minutes with the supply fan off followed by 40 minutes
of continuous normal operation.
• VNT6150H1000 and 6200H1000 HRV cycle runs for 8 minutes with the supply fan off followed by 32 minutes
of continuous normal operation.
• Defrost cycles will continue to repeat as long as the temperature is 23°F (-5°C) or less.

Wiring

CAUTION: Voltage hazard.
Can cause equipment damage.
Disconnect power from the unit before beginning installation.

Terminal Description

The wiring terminal block is located behind the control module door on the side of the unit.
To access the terminal block, open the control panel door by swinging it open and to the right as shown above.
24
INTERLOCK TIMER
COM
NC NO B
G
RLY1
D1
LVC – L1
SW2
SW1
Z13
W B
B1
CASE GND Vectouch
REMOTES
TrueFRESH™ ERV/HRV Ventilation Systems 69-2480EF—13
G R
JP1
JP2
COM PORT
G R
M33110