Prestige SOLO 299/399 - ACVMax Boilers
Natural to Propane Instructions
2
1.0 Installation of the Propane Orifice
1. Turn off the electrical power supply to the boiler.
2. Close the manual gas shut off valve to the unit.
3. Remove the front panel of the Prestige by
removing the screws along the bottom edge of
the unit. Pull the bottom of the panel forward
and then lift up to remove the front panel from
the unit.
4. Remove the air inlet elbow (Fig 1, Item 1) from
the venturi using a twist and pull motion.
5. Remove four (4) electrical plugs and one (1)
ground wire connection from gas valve.
6. Disconnect the gas supply piping inside the
Prestige enclosure at the brass union located
just above the gas valve. See Fig. 1.
7. Remove the four (4) T-25 Torx head screws used to
mount the gas supply piping to the bottom of the gas
valve. Do not discard the screws. Remove the gas
valve assembly from the gas piping. See Fig. 1.
8. Remove the four (4) T-25 Torx head screws
attaching the brass union collar to the top of the
gas valve. Do not discard the screws. Remove
the brass natural gas orifice from the underside
of the brass union collar. See Fig. 2.
9. Install the appropriate brass propane orifice
from Table 1 in the gasket between the brass
union collar and the venturi. The rubber o-ring
must remain attached to the brass union collar.
See Fig. 2.
1. Air Inlet Elbow
2. T-25 Torx Head Screws (Gas Valve to Gas
Piping)
3. Gas Valve
4. Brass Union
Fig. 1: Prestige Gas Valve/Piping Assembly
2
3
4
1
Fig. 2: Orifice Location
1. T-25 Torx Head Screws (Union to Gas Valve)
2. Gas Valve
3. Orifice
4. Orifice O-Ring
Table 1: Propane Gas Orifice
2
1
3
4
Model
Orifice Size
Solo 299/399
0.315 inch (8.0 mm)
