6.6.6 Replacing the Combustion Air Blower
Refer to Chapter 4, Section 4.4, Clean Combustion Air Blower, for instructions on removing and re- installing the combustion air blower.
6.6.7 Replacing the Gas Valve
1.Turn off the gas supply to the rethermalizer, unplug the unit, and drain the cookpot.
2.Disconnect the unit from the gas supply line and remove any fitting that may be attached to the gas manifold at the rear of the unit.
3.Disconnect the gas lines at each burner orifice.
4.Disconnect the gas enrichment tubes at the gas valve cross fitting.
5.Disconnect the wires from the gas valve terminal, marking each wire to facilitate reconnection.
6.Remove the two nuts securing the gas manifold bracket to the base frame.
7.Pull the gas manifold assembly out the front of the unit.
8.Remove the gas valve from the manifold assembly and remove all fittings from the old valve.
9.Install the fittings removed from the old valve on the new valve, using Loctite® PST56765 or equivalent pipe thread sealant.
10.Apply Loctite® PST56765 pipe thread sealant or equivalent to the threads of the manifold and install the new gas valve.
11.Position the gas manifold system in the unit and replace the two nuts removed in step 6.
12.Reverse steps
13.Check burner manifold gas pressure in accordance with procedure given in Chapter 4.
6.6.8 Replacing a Burner Assembly
(NOTE: If space permits, it is recommended that the unit be disconnected from the gas line and laid on its back when performing this procedure. Be sure to place blocks under the unit to protect the end of the gas line.)
1.Unplug the rethermalizer.
2.Disconnect the flexible gas line at the burner orifice.
3.Remove both air hoses from the blower assembly and the burner assemblies.
