Nortec GS Series - Manual (Page 52)

49 | GS Series Installation
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 non-approved
parts is not covered under NORTEC’s standard warranty.
Hot surface igniter and flame sensor replacement
Shut off electrical power and gas supply to the humidifier.
Remove the right side service access door.
Disconnect all wiring to the igniter and flame sensor.
Unscrew the fixing nuts for the igniter and flame sensor. Carefully remove the igniter and flame sensor.
Reverse the sequence above to install the new igniter and flame sensor. Always install a new 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
Shut off electrical power and gas supply to the humidifier.
Remove the right side service access door.
Disconnect all wiring to the combustion blower, gas valve, air proving switch, igniter and flame sensor (note
the connector assignment).
Undo the union on the flexible gas hose and disconnect the gas hose from the gas valve.
Undo the 4 nuts on the blower outlet and remove blower, leaving the gas valve/air inlet assembly and the
fan-board mounting bracket (if present) mounted to the blower.
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.
Reverse the sequence above to re-install the burner after cleaning or, if necessary, replace with a new
burner. Inspect and replace any gaskets that may be damaged. Tighten the 4 brass nuts of burner
mounting plate to a torque of 95 in-lb.
Leak test the gas train before re-commissioning the humidifier.
Figure 32: Flame Sensor and Igniter Assembly Figure 33: Burner Assembly