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ELECTRICAL CONNECTIONS
ELECTRICAL CONNEC-
TION TO A FURNACE
PRACTICAL TIPS
Caution:
• Never connect a 120 volt AC
circuit to the terminals of the
Accessory Control Contacts.
Only use the low voltage
class 2 circuit of the fur-
nace 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 "Alternate Furnace
Interlock Wiring".
If you want to know your local dealer, contact:
Toronto
1155 B, Barmac Drive
North York, ON M9L 1X4
(T) 416.744.7206
(F) 416.744.7210
16
(CONT'D)
Standard Accessory Control Contact
Standard Furnace Interlock Wiring
FOUR
WIRE
TWO WIRE
heating only
W
R
G
C
Y
FURNACE
24-VOLT
TERMINAL BLOCK
Alternate Accessory Control Contact
Alternate Furnace Interlock Wiring
W
FOUR
WIRE
TWO WIRE
heating only
W
R
WIRE JOINT
G
C
Y
FURNACE
24-VOLT
TERMINAL BLOCK
powrmatic
Halifax
Ottawa
3607, Strawberry Hill
162, Elm Street
Halifax, NS B3K 5A8
Ottawa, ON K1R 6N5
(T) 902.454.8684
(T) 613.230.7160
(F) 902.453.5875
(F) 613.230.0685
THERMOSTAT
TERMINALS
W
R
G
Y
TWO
WIRE
THERMOSTAT
TERMINALS
R
G
Y
TWO
WIRE
Québec
365, Fortin
Vill-Vanier, QC G1M 1B2
(T) 418.683.2708
(F) 418.683.8860
ELECTRONIC BOARD
COOLING SYSTEM
HRV
ELECTRONIC BOARD
COOLING SYSTEM
Montréal
9500 BLVD. Ray-Lawson
Anjou, QC H1J 1L1
(T) 514.493.6400
(F) 514.493.8722
Item #: 403322
Rev Date: 030806
HRV