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Ventilation Controls (optional)
* NOTE: Recirculation is available on HRV3−095, HRV3−150,
HRV3−200 only.
4-Mode Descriptions
The two optional digital controls have 4 operational modes
and 2 or 5 speeds on each mode to adjust indoor ventila-
tion levels. Experiment with the ventilation levels in the
home to evaluate the best amount of ventilation to suit the
homeowner needs and preferences.
1. Continuous Ventilation Mode (VENT)
This is the most popular mode since it provides contin-
uous ventilation within the home. You may, for exam-
ple, select Continuous Ventilation at high speed for
high household activity levels, or Continuous Ventila-
tion at low speed for lower activity levels.
2. 20 minutes ON, 40 minutes OFF Mode (20/40)
This mode provides 20 minutes of ventilation each
hour. Use this mode in low speed for low household ac-
tivity levels or if the home is unoccupied.
3. 20 minutes ON, 40 minutes, Recirculation Mode*
(20/40/RECIRC)
This mode provides 20 minutes of ventilation each
hour and 40 minutes of recirculated air. Use this mode
if the HRV is NOT connected to a forced air system
(forced air system already circulates household air).
4. Continuous Recirculation Mode* (RECIRC)
This mode recirculates household air (no ventilation).
Use this mode if the HRV is NOT connected to a forced
air system.
Synchronizing the Humidity Setting on Digital
Controls
Either optional control has a feature that allows it to be syn-
chronized with other humidity instruments in the home. To
synchronize:
1. Turn off the control by pressing ON/OFF.
2. Simultaneously press and release ON/OFF and the
20/40/60 minute high−speed OVERRIDE buttons.
3. Use the UP/DOWN arrows to adjust the Humidity Indi-
cator on the display screen to the number of degrees
difference between your humidity measuring device.
Minus is indicated by flashing.
4. Press MODE.
Digital 2−Speed/4−Mode Control (Y2171)
This fully-digital device allows control of when and how
much fresh air will enter the home.
Key features
S
2−speed fan setting (Low−1/High−2)
S
Standby setting (Fan speed 0)
S
Electronic dehumidistat
S
Four selectable modes of operation (see 4−Mode De-
scriptions" in left column of this page)
Continuous Ventilation (VENT)
20 min. On / 40 min. Off
(20/40)
20 min. On / 40 min. Recirculate
* (20/40/RECIRC)
Continuous Recirculation* (RECIRC)
S
20 / 40 / 60 High speed override button
S
Instruction card inserted in control
S
Easy-to-read LCD screen
S
Connect to 3−wire, 20−gauge (min.), low−voltage wire
Setting the Control
1. Press and release MODE until FAN symbol appears
on the screen. Press SET.
2. Use UP/DOWN arrows to select desired fan speed (0,
1, 2). Press SET.
3. Use UP/DOWN arrows to select the desired opera-
tional mode (VENT, 20/40, 20/40 RECIRC*, RE-
CIRC*, OFF). Press SET.
20/40/60 Minute High Speed Timer Override
This
function temporarily initiates high−speed ventilation for 20,
40, or 60 minutes. Press OVERRIDE once for 20, twice for
40, and three times for 60 minutes.
Setting Dehumidistat
Refer to Dehumidistat Opera-
tion" (Page 8) before setting the dehumidistat.
1. Press and release MODE until RH" and a number
flashes. Use UP/DOWN arrows to select desired num-
ber. Press MODE to exit.
2. Press MODE again to return to operational features.
Instruction
card
Humidity
indicator
Increase
button (
UP
arrow)
SET
button
Decrease
button
(
DOWN
arrow)
Fan speed
indicator
20/40/60 minute
high−speed
OVERRIDE
button
MODE
select button
Mode indicator
ON/OFF
button
High speed
override timer
indicator
Figure 4. Digital 2-Speed/4-Mode Control
(Y2171)
