6.Once the pressure has been adjusted, replace the locking cap.
7.Replace the screw in the “out” pressure port and tighten firmly.
COMPONENT REPLACEMENT
CONSULT FACTORY PRIOR TO THE REPLACEMENT OF ANY COMPONENT.
All service work must be performed by experienced and trained personnel.
Only use original NORTEC spare parts to replace defective components. Damage caused by
Hot Surface Igniter and Flame Sensor
Replacement
1.Shut off electrical power and gas supply to the humidifier.
2.Remove the right side service access door.
3.Disconnect all wiring to the igniter and flame sensor.
4.Unscrew the fixing nuts for the igniter and flame sensor. Carefully remove the igniter and flame sensor.
5.Reverse the sequence above to install the new igniter and flame sensor. Always install a new
Figure #27
Flame Sensor and Ignitor Assembly
gasket when replacing the flame sensor and igniter.
CAUTION: The silicon carbide igniter is breakable. Handle with great care to avoid damage.
Burner Removal and Installation
1.Shut off electrical power and gas supply to the humidifier.
2.Remove the right side service access door.
3.Disconnect all wiring to the combustion blower, gas valve, air proving switch, igniter and flame sensor (note the connector assignment).
4.Undo the union on the flexible gas hose and disconnect the gas hose from the gas valve.
5.Undo the 4 nuts on the blower outlet and remove blower, leaving the gas valve/air inlet assembly and the
6.Undo the 4 large nuts that secure the burner mounting plate to the face of the heat exchanger and carefully remove the burner assembly. Handle the burner only by the metal surfaces. Do not grip the ceramic matting as grease, dust or dirt can affect the performance of the burner.
7.Reverse the sequence above to
Figure #28
Burner Assembly
Hold Burner only on metal pipe
Ceramic Matting DO NOT TOUCH!
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