WARNING
!
7
RHT
Series
2.0
Installation
• 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 General Manual and
Series Insert 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.
Wiring
THERMOSTAT
BURNER BOX
(observe polarity)
120 Volt Power
L1
N
PANEL GROUND
Additional wire needed on
thermostats requiring
constant power.
24VAC
High
Low
N
NOTE
: If optional black
power cord is installed,
then L1 is brown or
black and Neutral is blue
or white.
1 2
LO HI
1/4” spade
terminals required
(as supplied)
120VAC
24VAC
EXTERNAL
TRANSFORMER
(Field Supplied)
L1
N
(observe polarity)
120 Volt Power
Figure 2.1
•
Field Wiring Diagrams
A.
Single Heater, Single Thermostat.
B.
Multiple Heaters, Single Thermostat.
1 2
LO HI
1 2
LO HI
BURNER CONTROL BOX
1 2
LO HI
BURNER CONTROL BOX
BURNER CONTROL BOX
L1
N
PANEL GROUND
120 VAC
(Observe polarity)
PANEL GROUND
PANEL GROUND
NOTE:
If optional yellow control cord is
installed, then the following wire colors apply:
Neutral
= Green
Low
= White
High
= Black
NOTE:
If optional black power
cord is installed, then:
L1
is brown or black
Neutral
is blue or white.
Three 1/4” spade
terminals required
(as supplied)
Additional wire needed on thermostats
that require constant power.
EXTERNAL TRANSFORMER
(Field Supplied)
120VAC
24VAC
Orange
Label
Orange
Label
Orange
Label
24V
High
Low
N
THERMOSTAT
120 VAC
(Observe polarity)
120 VAC
(Observe polarity)
N
N
N
120VAC Power (observe polarity)
