PRESTIGE Venturi
Replacement Kit
Instructions
1. Turn power to the unit “OFF”.
2. Remove the front jacket panel. Swing away the
Control Module panel (MCBA) or tilt down the
Control Module panel (TriMax).
3. Shut off gas supply to the Prestige boiler at the
main manual shutoff valve.
4. Disconnect the gas piping at the brass union
located near the gas valve inside the boiler
enclosure.
5. Using a Phillips screwdriver disconnect the rec-
tifier cable to the gas valve (MCBA).
6. Remove Molex plug from gas valve (TriMax).
7. Remove the air inlet elbow from the venturi.
Note the orientation of the venturi / gas valve
assembly and the venturi gasket in relation
to the blower housing when disassembling
the venturi / gas valve assembly.
8. Using the #25 Torx wrench from the kit remove
the 2 venturi mounting screws attaching the
venturi / gas valve assembly to the blower, see
Fig. 2. Remove the venturi / gas valve assem-
bly from the blower.
There is a gasket between the venturi and the
blower housing. If the gasket “sticks” to the
blower housing use a flat blade putty knife to
remove any gasket material. Make sure not
to scratch or score the mating surface on the
blower housing.
9. Remove the three screws attaching the gas valve
to the venturi as shown in Fig. 3. Use Torx
wrench supplied in kit to remove screws. Note
orientation of the venturi to the old gas valve for
reassembly of the new venturi on the gas valve.
10. Reassemble the gas valve, using the existing three
Torx screws to the venturi. See Fig. 3.
Ensure the gas valve/orifice gasket is in place
before reassembling the gas valve and venturi.
Failure to do so can result in death, serious
injury or substantial property damage.
For propane installations a brass orifice is
located inside the gas valve/orifice gasket.
This orifice must be placed inside of the new
gas valve/orifice gasket before reassembly.
Failure to insert the propane brass orifice, on
propane installations, before reassembling
the gas valve and venturi can result in the
production of carbon monoxide due to
incomplete combustion and may result in
death, serious injury or substantial property
damage.
NOTICE
NOTICE
WARNING
NOTICE
WARNING
2
Venturi/Gas
Valve Assembly
Venturi
Mounting Screw
Venturi
Mounting Screw
Fig. 2: Venturi/Gas Valve Assembly
