Thermostat - Brant Radiant Heaters DET3 Series Manual

3.0 Installation •

Thermostat

This heater must be installed and serviced by trained gas installation and service
personnel only.
Do not bypass any safety features or the heater's built in safety mechanisms will be
compromised.
• This heater must be electrically grounded in accordance with the Canadian Electrical Code C22.1
(latest edition).
• Applications must conform to the Canadian Electrical Codes C22.1 (latest edition) when an external
electrical source is used.
• Refer to the rating label on heater for the required amperage rating.
• Under no circumstance is the electrical supply line to the heater to provide any assistance in the
suspension of the heater.
• Neither the electrical supply line nor sprinkler heads shall be located within the minimum clearances
to combustibles.
Connecting the thermostat with a voltage other than 24VAC may damage the heater. The DET3 Series
requires a 24VAC connection to the thermostat. The DET3 Series is equipped with an internal relay
board. A field supplied external transformer must be installed, see wiring diagram (figures 2.1A-B).
NOTE: A yellow control wire replaces the external terminal plug on stainless steel models or models with
water resistant upgrades.
Thermostat
NOTE: Different thermostats operate according to their particular features. Refer to thermostat
specifications for details.
DET3 Series heaters require a 24VAC, two stage thermostat to operate. The burner control box is
equipped with a round terminal strip that accepts three (3) 1/4 in. female spade terminals. Do not supply
120VAC to the 24VAC connection.
Example: Desired room temperature is 65° F. The preset differential of the thermostat is 1° F.
The preset differential for High fire mode is 3° F.
When the temperature drops below the Low Fire preset differential of the thermostat (63° F), Low Fire will
activate. If the temperature continues to drop below the preset differential for High Fire, High Fire will
activate bringing the temperature back up to the Low Fire preset quickly.
WARNING
!
NOTICE
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DET3 Series