Electrical Connection To The Furnace - Broan ERV110S Manual De Uso

5.

ELECTRICAL CONNECTION TO THE FURNACE

Never connect a 120-volt AC circuit to the terminals of the furnace interlock (standard wiring). Only use the low voltage class
2 circuit of the furnace blower control.
For a furnace connected to a cooling system:
On some older thermostats, energizing the "R" and "G" terminals at the furnace has the effect of energizing "Y" at the thermostat and
thereby turning on the cooling system. If you identify this type of thermostat, you must use the
S
TANDARD FURNACE INTERLOCK WIRING
W R G
FOUR
WIRES
TWO WIRES
heating only
W
R
G
C
Y
FURNACE
24-VOLT
TERMINAL BLOCK
VE0108A
THERMOSTAT
TERMINALS
Y
TWO WIRES
COOLING SYSTEM
!
WARNING
A
LTERNATE FURNACE INTERLOCK WIRING
W
4 WIRES
2 WIRES
heating only
W
R R
G
C
Y
Y
FURNACE
24-VOLT
TERMINAL BLOCK
14
ALTERNATE FURNACE INTERLOCK WIRING
THERMOSTAT
R G Y
TERMINAL
wiring
nuts
NO
NC
C
2 WIRES
.
COOLING SYSTEM