L.B. White Sentinel Radiant Tube AT150 Center Mount - Manual (Page 14)

Refer to the heater’s burner box hinged access panel, or
refer to Start-up instructions in this manual to determine if
your heater has a single or two stage gas control.
When connecting a thermostat or building controller to the
burner box, route the wiring through the water tight
c o n n e c to r n e a r t h e p owe r c o rd a f te r r e m ov i n g t h e
connector’s plug. See Fig.13 If the connector does not
completley seal around the wiring after tightening, apply
silicone at the wire entry of the connector.
All interconnecting thermostat wiring must be at least 18
gauge to prevent voltage drop. Ensure the terminal marked
W on the ignition control receives 24 VAC from the
thermostat or building controller.
FIG. 13
A. Heaters with Single Stage Gas Control Valve
1. Connecting series tap thermostat kit.
-- Connect power cord of heater to female side of
thermostat cord set.
-- Plug the male side of cord set into an approved
extension cord or to wall outlet.
2. Wiring Single Stage Thermostat (See Fig.14)
-- Remove wire nut at yellow and orange wire.
-- Connect wiring of thermostat as shown or refer to
electrical diagram on heater
3 Building Controller Connections (See Fig.15)
-- Remove wire nut from yellow and orange wires.
-- Connect controller contacts as shown.
B. Heaters with Two Stage Gas Control Valves
Heaters with two stage gas controls are wired to start up
and operate in the first stage position as shipped from
the factory. Connection to a thermsostat or building
controller is required for further operation.
1. Wiring Two Stage Thermostat (See Fig.16)
-- Remove wire nut at orange and yellow wires.
-- Connect wiring of two stage thermostat as shown.
2. Building Controller Connections (See Fig.17)
-- Remove wire nut at orange, yellow , and red wires.
-- Connect controller contacts as shown.
-- Supply an electrical connection (jumper) between
relays in building control to allow staging transition
of gas control valve.
FIG. 17
HEATER CONTROLS
WARNING
Electrical Shock Hazard
■
Disconnect the heater’s electrical supply before
interconnecting the temperature control.
■
Failure to disconnect the electrical supply will result in
electrical shock.
■
Electrical shock will cause severe injury or death.
14
SINGLE STAGE
HEAT CONTACTS
TIGHTEN CONNECTOR SECURELY
AFTER INSTALLING THERMOSTAT
CORD)
FIG. 16
FIG. 14
FIG. 15