14
INSTALLATION
7- COMBINATION HEATER WIRING
Electrical shock hazard. Can cause
severe personal injury, death or substan-
tial property damage. Disconnect power
before installing and/ or servicing.
Wiring Diagram Requirements
•
All wiring must be a minimum of 14
gauge and installed in accordance with:
- U.S.A. - National Electrical Code and
any other national, state or local code
requirements having jurisdiction.
- Canada - C.S.A. C22.1 Canadian
Electrical Code Part 1 and any other
national, provincial and local code
requirements having jurisdiction.
•
If original wire, supplied with appli-
ance must be replaced, Type 90ºC or its
equivalent must be used.
•
All electrical contacts shown do not have
power applied - off shelf condition.
Zone Valves
•
Transformer should be sized for maxi-
mum load of all zone valves.
Space Heating
• For single zone space heating wiring,
connect 24 V thermostat wiring to com-
bination heater snap-set labeled “Room
Thermostat”.
Outdoor Control Limit
•
Provided and installed by others
•
Remove factory jumper and use terminal
9 &10
WARNING
Equipment
Ground
On-Off
Switch
120 VAC
Circulator
Blower
Manual
Reset
Limit
Auto
Reset
Limit
LWCO
Secondary
T-stat
Primary
T-stat
Room T-stat Snap-set
Air Switch
Ignition Control
(see Fig. 18)
3 Port Valve Snap-set
All wiring must comply with the National Electrical
Code and additional national, state or local code
requirements. For Canadian installations, all
wiring must comply with the Canadian Electrical Code
All wiring must be N.E.C. Class 1.
Use 90ºC. thermoplatic wire or equivalent, if only
the original wire must be replaced.
- Denotes Terminal Block
1.
2.
3.
4.
Note
12
13
15
14
10
11
18
16
19
17
5
7
4
3
B
R
R
W
1
Factory
Jumper
8
9
R3A
OR
OR
V
V
BL
R2B
R3B
V
R2
T
T
Y
Y
Y
6
B
B
B
R
R1A
R2A
2
H
N
G
P
P
Y
120V
24V
R1
R3
Fig. 12: Wiring Diagram
All wiring must comply with the National Electrical
Code and additional national, state or local code
requirements. For Canadian installations, all
wiring must comply with the Canadian Electrical Code
All wiring must be N.E.C. Class 1.
Use 90ºC. thermoplatic wire or equivalent, if only
the original wire must be replaced.
- Denotes Terminal Block
1.
2.
3.
4.
Note