NOTE: To avoid water damage or scalding due to valve operation, drain pipe must be connected to valve outlet and run to a safe place of discharge. Drain pipe must be the same size as the valve discharge connection throughout its entire length and must pitch downward from the valve. No
ELECTRICAL WIRING
NOTE: If it is necessary to replace any of the original wiring, it must be replaced with 105°C wire or its equivalent, except all black wire must be replaced with 150°C wire or its equivalent.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing.
DANGER - SHOCK HAZARD - Make sure electrical power to the heater is disconnected to avoid potential serious injury or damage to components.
MILLIVOLT SYSTEM
The Millivolt System Residential Heater is equip- ped with a
ELECTRONIC INTERMITTENT IGNITION DEVICE SYSTEM (IID)
NOTE: When the electrical hookup to the heater requires both 24V and 115V or 240V, each input voltage must be isolated in separate conduit.
The Electronic Intermittent Ignition Device automati- cally lights the pilot and main burners upon a call for heat. The heater is supplied with a dual voltage trans- former for 120V or 240V input power hookup. Heaters are factory wired for 240V power supply.
NOTE: IID PROPANE UNITS ONLY: Heater is equipped with an electronic ignition device with a 100% safety lockout feature. If the heater fails to start or lockout, reset the ignition device by interrupting the power to the heater for 60 seconds.
CAUTION: If service replacement of the electronic ignition device is required, replace only with a 100% safety lockout device with 90 second trial for pilot ignition.
HONEYWELL
INTERMITTENT
IGNITION
DEVICE
Fig. # 8929.1
17
