Roberts Gorden COMPLETE HED Series, Installation, Operation & Service Manual

Page: 53 / 72

SECTION 10: W
IRING
47
SECTION 10: WIRING
Heaters can be controlled u sing se v eral methods.
Normally thermostats are u sed to control the heaters
b u t they can also be controlled by an Energy
Management System. Section 10.1 belo w ill u strates
the connection for heaters controlled by a line v oltage
thermostat. NOTE: In order to u se line v oltage ther-
mostats, the lo w v oltage terminal located at the back
of each b u rner m u st be connected as sho w n in the
detail. For a single heater on a lo w v oltage thermo-
stat, See Section 10.2 belo w . To control m u ltiple
heaters on one lo w v oltage thermostat, See Page 48,
Section 10.3 . NOTE: In order to control m u ltiple heat-
ers on one lo w v oltage thermostat, the lo w v oltage
terminals on each heater m u st be connected as
sho w n in detail. Heater m u st be gro u nded in accor-
dance w ith applicable codes: United States: refer to
National Electrical Code ® NFPA 70 - latest re v ision
Canada: refer to Canadian Electrical Code, CSA
C22.1 Part I - latest re v ision.If any of the original
internal w iring m u st be replaced, it m u st be replaced
w ith w iring materials ha v ing a temperat u re rating of at
least 105° C and 600 V.
10.1 Line Volta g e Thermostat Wirin g
10.2 Low Volta g e Thermostat with One Burner
DANGER
Electrical Shock Hazard
Disconnect electric before service.
Heater must be properly earthed.
Failure to follow these instructions can result
in death or electrical shock.
Line Voltage
Thermostat
Gnd.
Gnd.
120 V-60 Hz
Supply Circuit
H N H N
Gnd.
L1
L2
T
Additional
Burners
Gnd.
120 V-60 Hz
Supply Circuit
H N
Gnd.
L1
L2
Low Voltage
Terminal Detail
Low Voltage
Thermostat
T