Full Product Manual

Frost Prevention Mode
WhisperComfort incorporates built-in frost prevention technol-
ogy 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
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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.
Panasonic offers the FV-WCSW21-W/A(White/Almond) 2
function switch as part of the WhisperControl product line.
This commercial grade on/off multiswitch can be used with the
ERV, includes a designer wall plate and carries a 2-year limited
warranty. This switch is sold separately.
32ºF
Open 1 hr.
Close 30 m.
Open 1 hr.
Open 10 m.
40 CFM20 CFM
Close 1 hr.
Open 10 m.
19ºF
-13ºF
Balanced Ventilation With Spot ERV
WINTER
SUMMER
Outside
Inside
OPERATION
ON
OFF
HI
LO
Switch sold separately.