Start-up procedure – I.C.E. 3 OSDs User Manual

Page 5

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Check for gas leaks with rich soap and water solution any time work is done on a gas control.


1. Remove shipping blocks from:

a) Blower if rubber or spring isolated.
b) Check to be sure that damper opens, if tied down, remove wire.
c) Check modulating discharge controller, on units, to ensure that it is in the blower air stream. On some units this

control may be mounted external from the unit. If so, check to see that the sensor installed is the discharge air stream
of the heater air and that the controller is wired to the modulating motor, regulating gas supply to burner.

2. Make sure that the main firing valve is closed, but that gas is available in the service line.

3. Check to ensure exhaust fans are wired into the control panel and that there is power to the exhaust starter relays.

Check to ensure exhaust fans interlock switches are installed and wired to the control panel.

4. Familiarize yourself with the sequence of operation and wiring diagrams this will give you information as to how the

unit operates in the paint and cure modes.

5. Check voltage to ensure it matches the voltage stamped on the unit rating plate, and all wires are connected between

unit and remote panel.

6. The timers TD-1 - TD-5 are factory set but you should check them to ensure they have not moved during transit to job


a) Normal setting of high limits are paint mode -165

°F cure mode -200°F auto reset.

7. Operate unit through paint mode by pushing in the system “on” push button. The unit should operate as per sequence

of operation.

a) Pilot

The Protector relay monitors the pilot flame through the flame rod. A minute current is sent from the relay through
the flame rod, and trough the pilot flame to “ground”. The relay detects the current flow and acts to open the safety
valve as required. When no flame exists, current cannot flow and the relay acts to close the valve. Current flow
depends only on flame contact on the rod: temperature of the rod is of no importance.

Since the flame rod is a current-carrying conductor, it must be free of any contact with conductive parts of the pilot
burner. Insulator must be clean, dry and free from cracks. While the flame rod is made of a heat resistant alloy it
may, after long service, deteriorate to the point of flame contact. Check for serious corrosion or loss of metal. It must
be tight enough in the insulator to maintain its position. Do not use too much force or the insulator may crack.

Proper operation of the flame rod can be checked by measuring the flame rod current; refer to flame safeguard
instruction sheet with unit. Lacking a micrometer, a check can be made with an operating burner through all its
normal phases. Relay response should be prompt with no chattering or drop out.

The spark rod (Midco Burner see Figure 5 for gap setting, Maxon Burner spark ignitor No. 18075) produces a high
tension arc at the correct location for lighting the pilot. Ignition transformer must be rated for 6000 Volts, 20
Milliampers secondary, minimum.

The spark rod or spark ignitor, must be free of contact with conductive parts of the pilot burner. Insulator must be
clean, dry and free of cracks. Check the spark rod for serious corrosion or loss of metal. It must be held tightly
enough is the insulator to maintain its position.

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