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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 shut-off valve shall be installed
between the relief valve and the drain line. Valve lever
should be tripped at least once a year to ensure that
waterways are clear.
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 self-generating electrical system in which
the electric current is provided by means of a pilot
generator. No external electrical connections are re-
quired.
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.
Fig. # 8929.1
17
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