Nortec Industries GS Series manual Removal and Installation of the Combustion Blower

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.

8.Leak test the gas train before re-commissioning the humidifier.

Removal and Installation of the Combustion

Blower

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 and air proving switch (note the connector assignment).

4.Undo the coupling on the flexible gas hose and disconnect the gas hose from the gas valve.

5.Undo the 2 screws that mount the gas valve/air inlet assembly to the blower and remove the assembly.

6.Undo the 2 screws of the fan-board mounting bracket (if present) and remove bracket, leaving electronic board and igniter jump start module(s) attached.

7.Undo the 4 nuts on the blower outlet and remove blower.

8.Reverse the sequence above to install the new combustion blower. Inspect and replace

Figure #29

Combustion Blower Replacement

any gaskets that may be damaged. When mounting the gas valve/air inlet assembly to the combustion blower, ensure that the cork gasket is properly oriented or gas flow through the valve will be impeded.

9.Leak test the gas train before re-commissioning the humidifier.

Gas Valve 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 gas valve and air proving switch (note the connector assignment).

4.Undo the coupling on the flexible gas hose and disconnect the gas hose from the gas valve.

5.Remove the hoses from the air proving switch (note the connection layout).

6.Undo the 2 screws that mount the gas valve/air inlet assembly to the blower and remove the assembly.

7.Undo the 4 screws and remove the gas pipe connection from the inlet of the gas pressure regulating valve.

8.Undo the 3 screws that hold the air inlet venturi to the gas valve. Remove the rubber grommet and brass orifice mounted in the outlet of the gas valve.

9.Undo the 3 screws of the pressure switch support bracket and remove the assembly from the gas valve.

10.Reverse the sequence above to install the new gas pressure regulating valve. Inspect and replace any gaskets that may be damaged. When mounting the gas valve/air inlet assembly to the combustion blower, ensure that the cork gasket is properly oriented or gas flow through the valve will be impeded.

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