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%
80
20
R
Y
G
Y
R
G
VTC VENT TIMER CONTROL
VTC VENT TIMER CONTROL
(OPTIONAL)**
(OPTIONAL)**
DH1 DEHUMIDISTAT
(OPTIONAL)**
FACTORY-INSTALLED JUMPER
DO NOT REMOVE
HRV/ERV WIRING TERMINALS
Y
R
G
12V/24 VAC Field wiring, 20 AWG min. required
* Connect V Terminal on the HHSC Control to the Hi Terminal (instead of Lo) for a shorter ventilation period.
** One DH-1 Dehumidistat and/or one or more VTC timer controls may be connected as shown. Connect all
Red, Yellow, and Green control terminals to the corresponding HRV/ERV terminals.
1
HI
6
LO
2
ON
C
7
R
NO
8
3
4
Y
NC
9
5
G
BK
10
LO
*
HI
24C
R
C
W
FURNACE OR
HEAT PUMP
HHSC CONTROL
R
C
Wt
Gt
Gf
Y
G
R
Y
W
G
THERMOSTAT
V
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