Ptional Uxiliary Ontrols; Lectrical Connection To The Furnace - Broan ERV140 ECM Guia De Instalacion

4. CONTROLS (
CONT
4.5 E C
LECTRICAL ONNECTION TO
Once the control(s) connections have been made, insert the terminal
connector on the recessed side of electrical compartment.
NOTE: For information about the operation of the wall controls, refer to the
user guide.
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
STANDARD FURNACE INTERLOCK WIRING
W R G
FOUR
WIRES
TWO WIRES
heating only
W
R
G
C
Y
FURNACE
24-VOLT
TERMINAL BLOCK
VE0108A
' )
D
O A
PTIONAL UXILIARY
THERMOSTAT
TERMINALS
Y
TWO WIRES
COOLING SYSTEM
C ( )
ONTROLS ALL UNITS
NO C NC I OC OL Y R G B
VE0371
VD0206
! WARNING
ALTERNATE FURNACE INTERLOCK WIRING
4 WIRES
2 WIRES
heating only
FURNACE
24-VOLT
TERMINAL BLOCK
15
59W VB60W
T
ERMINAL
CONNECTOR
B
OTTOM OF THE UNIT
ALTERNATE FURNACE INTERLOCK WIRING
THERMOSTAT
W R G Y
TERMINAL
wiring
nuts
W
NO
NC
R
R
G
C
C
Y
Y
2 WIRES
.
COOLING SYSTEM