Rev. December 19, 2008
Page 11 of 19
Damper Defrost – On damper/recirc. models, the temperature sensor is located in the fresh air stream
before the core. When the outdoor air temperature is measured to be below freezing, a timed defrost
cycle is initiated. The machine runs normally for 36 (normal mode) or 20 (arctic mode) minutes and then
shuts off the fresh air by closing a damper for 4 (normal mode) or 5 (arctic mode) minutes. This timed
cycle repeats until the temperature of the outdoor air is measured to be above 0 C. Note: When the
machine has power but is not turned on the damper automatically closes off the fresh air port to prevent
unwanted drafts while the machine is not in operation.
Change from previous board-versions: When in defrost mode, the fans operate in high-speed. A call from the timer now lasts
20 minutes total, even if the machine is in defrost (previous versions would wait until defrost was complete and then resume
the timer).
3.2.
Machine ON/OFF Switch
Switch to the ON position " | " to enable operation of the HRV.
3.3
Standard Dehumidistat - Part # DSTAT-1
With this standard basic control the system is designed to operate
on a low speed for continuous ventilation with intermittent high
speed for moisture on air quality control. The dehumidistat will
switch the HRV to high speed when the relative humidity of the air
around it exceeds its set point. When the humidity falls below the
set point, the machine drops out of high speed.
3.4.
Windsor Control (Part # WIN-1)
The Windsor Dehumidistat Control incorporates a
3-position switch
from which the operator can select
three operating modes.
1.
OFF - disables all functions.
2.
STANDBY - HRV is on stand-by (intermittent). High speed ventilation on demand from the
dehumidistat, or remote timers. i.e. Auto-Off
3.
CONTINUOUS - continuous low speed ventilation. HRV cycles to high speed on demand
from the dehumidistat or timers.
The two position switch:
Constant
- locks the motors in High speed
Standard –
normal operating mode enables functions 2 and 3 above.
Wires from the control are colour coded as follows: black/HUM, green/INT, yellow/CONT, red/24V
COM. Remove factory installed jumper wire at CONT and 24 V COM.
Four-conductor wire is used.
3.5.
Windsor Timer (WIN-20)
Install in bathrooms, kitchens, workstations or other locations where high-speed ventilation control is
needed. The machine will run at high speed for twenty (20) minutes and then return to its normal
operating condition.
HUM
INT"
|
CONT"
||
24 V
COM
SWITCH
LED
