6
Cooling:
AUTO -- the ventilator selects the speed based on indoor humidity
and outdoor temperature. It may cycle on/off every 30 minutes
depending on humidity and outside temperature.
LOW -- low speed all of the time.
HIGH -- high speed all of the time.
If the fan speed is set to Auto and the ventilator wants to run, the
fan speed will run at High continuous speed. Otherwise, the fan
will stay at the chosen continuous fan speed.
Wiring
Remove top cover assembly from wall control and pass thermostat
wire through hole located on back of control before attaching to
wall. Connect Y, R, G, and B (yellow, red, green and black)
between wall control and HRV circuit board. Following color code
(see Fig. 7 and Fig. 8). Replace top cover assembly.
NOTE
: HRV wall control and circuit board operate on 12vdc.
YELLOW
Y
R
GB
RED
GREEN
BLACK
A98383
Fig. 7 -- Typical Wall Control
% D’HUMIDITE RELATIVE HUMIDITY
’
% HUM. RELATIVE HUM.
55%
45%
35%
30%
EXT. TEMP. EXT.
MODE
MAINTENANCE
AIR EXCHANGE
ECHANGE D’AIR
’
20
25
30
40
50
60
70
80
10
o
C/50
o
F
0
o
C/32
o
F
–10
o
C/14
o
F
–20
o
C/– 4
o
F
CONTROL
CONNECTOR
WALL CONTROL
YELLOW
RED
GREEN
BLACK
A98410
Fig. 8 -- Control Connections
Humidity Selector
The humidity selector is a built--in dehumidistat designed to
properly control the level of humidity in the house during the
winter months. This control helps avoid condensation problems in
upper northern regions where indoor humidity is a problem during
the winter season.
NOTE
: This control is not to be confused with a dehumidistat
used during the summer months to control high relative indoor
humidity.
Table 5 recommends humidity levels to avoid condensation.
Table 5 – Recommended Humidity Levels
OUTSIDE
TEMPERATURE
DOUBLE---PANE
WINDOWS
TRIPLE---PANE
WINDOWS
50
°
F / 10
°
C
55%
65%
32
°
F / 0
°
C
45%
55%
14
°
F / ---10
°
C
35%
45%
---4
°
F / ---20
°
C
30%
45%
---22
°
F / ---30
°
C
25%
35%
ELECTRICAL CONNECTIONS
115--VAC Wiring
The HRV operates on 115VAC. It comes with a power cord
attached to unit and ready to plug into a fused outlet. Unit must be
grounded for proper operation.
All electrical connections must comply with National and Local
Electrical Codes, or other ordinances that might apply.
ELECTRICAL SHOCK / FIRE HAZARD
Failure to follow this warning could result in property or unit
damage.
Do not use an extension cord as a power source for operating
the HRV.
!
WARNING
12--vdc Wiring
The HRV circuit board, wall control, and accessories operate on
12vdc. See Wall Control section, item Wiring and Fig. 7 and Fig. 8
for more information.
ACCESSORIES
NOTE
: Interlock relay is now integrated into the control.
The purpose of interlock relay is to energize indoor system
equipment (furnace or fan coil) blower whenever HRV is calling. If
HRV is energized, and indoor system equipment is not, interlock
relay will energize and make R and G at indoor equipment. This
will ensure fresh air distribution throughout the building via the
central duct system.
20 Minute Timer
A push button timer can be used to override the wall control and
put the HRV into high speed for 20 minutes. Connect switches in
parallel and connect leads to HRV terminals I, OC, and OL (see
Fig. 8). Push button locations are ideal in special activity areas,
such as, bathroom, or kitchen, where high--speed exhaust operation
is needed for a short period of time.
NOTE
: The 20 minute timer will not function properly unless
HRV wall control is applied and working correctly. Timing
function is internal to electronic circuit board, it is activated by a
momentary contact between OC and OL. The I connection is to
illuminate the push button. The maximum number of push button
timers that can be applied is 5.
60 Minute Adjustable Timer
A 60 minute adjustable timer can also be used to override wall
control and put HRV into high--speed operation for a select amount
of time. Connect timer in parallel with push button timers, or to
HRV terminals OC and OL (see Fig. 8).
The 60 minute timer will provide a minimum of 10 minutes, and a
maximum of 60 minutes of ventilation at high speed.
