Frost Prevention Mode
WhisperComfort incorporates built-in frost prevention technology
to avoid core freeze up.
•
Above 32ºF both exhaust and supply are fully functional
•
From 32ºF to 20ºF the mechanical damper on the supply air
closes for 30 minutes, then opens 1 hour at the set high/
low mode. The cycle repeats itself to avoid core freeze up.
(Exhaust only 30 minutes per 90-minute cycle)
•
Below 20ºF the mechanical damper on the supply air remains
closed for 1 hour and opens 10 minutes at low mode. After
10 minutes the cycle will repeat or change if the temperature
has risen above 20ºF. (Exhaust only 60 minutes per 80-minute
cycle)
Settings
WhisperComfort has two 2-speed CFM settings
High
Low
__________________________________________________
Setting 1.
20 CFM
10 CFM
Setting 2.
40 CFM
20 CFM factory preset
The factory setting is 40/20 CFM. To change to optional 20/10
CFM setting, move the plug connector located in the junction box
to the 20 CFM side of receptacle. This step must be completed
prior to installation.
Switches
WhisperComfort operates in an on/off and high/low mode. When
the switch is turned off, the unit does not operate. When the switch
is turned on, the unit will operate at the high or low mode. A duplex
switch, designed for a single gang box, may be selected for switch
operation. Switch labels are provided for convenience to attach to
the selected switches.
32ºF
Open 1 hr.
Close 30 m.
Open 1 hr.
Open 10 m.
40 CFM
20 CFM
Close 1 hr.
Open 10 m.
19ºF
-13ºF
Balanced Ventilation With Spot ERV
WINTER
SUMMER
Outside
Inside
OPERATION
ON
OFF
HI
LO
Switch is not supplied.
