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HL2
Series
Wiring
Electric Shock
Field wiring to the tube heater must be connected and grounded in accordance with national,
state, provincial, local codes and to the guidelines in the Tube Heater Manual. In the United
States refer to the most current revisions to the ANSI/NFPA 70 Standard and in Canada refer to
the most current revisions to the CSA C22.1 Part I Standard.
Figure 3.34
•
Field Wiring Diagrams
A. Single Heater, Single Thermostat. No Relay Board (white label)
NOTE: If optional yellow
control cord is installed,
the following colors apply:
24VAC: Green
Low: White
High: Black
N
Low
High
24VAC
THERMOSTAT
B. Multiple Heaters, Single Thermostat. With a Relay Board (HLRB orange label)
!
WARNING
1/4" spade
terminals required
(as supplied)
24V
1
2
LO HI
Additional wire needed on thermostats
requiring constant power.
Ground Screw
on Control Box
BURNER BOX
47
3.0
Installation
PANEL GROUND
NOTE: If optional black
power cord is installed,
then L1 is brown or
black and Neutral is blue
or white.
L1
N
120 Volt Power
(observe polarity)
•
Wiring
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