18
I-OH (01-20) PN120390R7
INSTALLATION—CONTINUED
Venting and Combustion Air—Continued
Outside Combustion Air Intake Adapter Kit (Option DE1, Shipped Separately)—Continued
Figure 11. Outside Combustion Air Intake Adapter Kit (Option DE1)
Electrical Connections
Electrical Connection Requirements
•
All wiring must be done in accordance with the National Electric Code or CSA Standard C22.1, Canadian Electrical
Code, Part 1, and local ordinances.
•
In many localities, #14 wire run in rigid conduit must be used, but where permissible, two- and three-wire BX is
recommended, particularly for connections to the controls and burner motor.
•
A cutoff switch for the main 115V line to the burner should be mounted on a fireproof wall in an accessible place
close to the burner.
Electrical Connections for Optional Equipment
•
The heater is equipped with low voltage controls (24V) for thermostat control.
•
Refer to separate instructions for any optional equipment provided.
Supply and Line Wiring
•
Check the rating plate on the heater for supply voltage and current requirements.
•
A separate line voltage supply with a fused disconnect switch should be run directly from the main panel to the
heater, making connection to leads in the junction box. All external wiring must be within approved conduit.
Conduit from the disconnect switch must be run so as to not interfere with heater service access. Refer to the
wiring diagram in the heater junction box.
•
All replacement wiring must be type SF, SEWF, TW, TEW, or equivalent. Use #18 gauge wire for control circuits
and #14 gauge or larger for line connections depending on current requirements.
•
Refer to
for unit electrical ratings (115V, 60 Hz).
Table 9. Electrical Ratings
Unit Size
Total Current Amperes
Minimum Circuit Ampacity
Minimum Fuse Size
095
6
8
15
140, 190
7
9
15
