Form No. 43539470
Oct 2019 A
–21–
14.8)
GAS VALVE (DSI)
The gas valve is not serviceable. If the valve has been submerged in water it must be replaced.
The gas valve operates with 24Vac. If the maximum inlet pressure of 60 mbar is not exceeded and the pressure
regulator adjusted properly there will be pressure on the outlet side of the gas valve after energizing the gas valve.
Replace if necessary.
14.9)
BURNER ORIFICE
Inspect the burner orifice for dirt or insect debris. Clean the orifice hole with a drill bit the same size as the orifice
or by soaking the orifice in acetone liquid cleaner. Dry the orifice by blowing compressed air through it. NOTE: Care
must be taken not to ream the orifice hole to a larger diameter as this will result in over firing the burner and
potentially causing damage to the heater.
14.10)
MAIN BURNER CHECKS
Inspect the main burner and check for cracks or extreme rusting.
Inspect the burner ports for dirt, dust or other debris. Clean with a bristle brush and blow out with compressed air.
Replace if necessary.
15.0)
REPLACING PARTS
Use only genuine Space-Ray® replacement parts. Parts are available from the factory for replacement by a licensed
person. Refer to the Replacement Parts Guide in Section 17 for all replacement parts.
15.1)
REMOVAL OF MOTOR AND BLOWER ASSEMBLY
Replacement procedure:
1.
Rotate the latching knob and open the door at the motor and blower compartment.
2.
Disconnect the motor lead wires.
3.
Remove the (10) sheet metal screws from the motor mounting plate. The motor and blower assembly is
heavy and must be supported well.
4.
Slide the complete motor and blower assembly away from the heater housing.
5.
To replace the blower wheel loosen the set screw holding the blower wheel onto the motor shaft. Remove
blower wheel and replace with new. Allow a clearance of 1/8” (3.2mm) between the blower wheel and the
mounting plate. Tighten the set screw (torque to 16.3 Nm) onto the flat side of the motor shaft.
6.
To replace the motor remove the blower wheel as described in 5.
7.
Remove the (4) hex nuts from the motor and slide away from the motor plate.
8.
Replace motor in reverse order and blower wheel as described in 5. Reconnect motor leads. Note: Refer to
the wiring connection diagrams in section 9.0.