Prestige SOLO 399 Boiler
Natural to Propane Instructions
3
13. Install the brass natural gas orifice and o-ring gas-
kets between the gas valve extension pipe and the
venturi. Ensure that the orifice and gaskets are in-
side the retaining ring cast into the venturi.
Taper on gas orifice should face the gas valve ex-
tension pipe. See Figs. 1 & 2.
Table 1: Propane Gas Orifice
Failure to retain the O-ring gaskets between venturi
and gas valve extension pipe will cause an improper
seal resulting in a potential risk of a gas leak. Any
potential gas leakage may result in death, serious
injury or substantial property damage.
14. Reassemble the gas valve extension pipe onto the
venturi using the four T-25 Torx head screws. En-
sure that the gas valve extension pipe is properly
oriented with the venturi.
There is a gasket between the venturi and the
blower housing. This gasket must be reinstalled.
Use care not to damage the gasket.
15. With the venturi / blower O-ring in place, re-
assemble the venturi / gas valve assembly to the
blower housing using the six T-40 Torx screws.
For the reassembly process do not use adhesive on
the venturi / blower gasket.
Use care in the reassembly of the venturi / gas
valve to the blower housing not to cross thread the
mounting screws. Support the weight of the ven-
turi / gas valve assembly when threading the
mounting screws.
16. Reconnect the wiring to the gas valve as shown
in Fig. 3.
17. Reconnect and tighten the internal gas supply
union using two wrenches and open the external
manual gas shut off valve. Before placing the
Prestige boiler back into operation check and test
all gas connections for leaks. Repair leaks if
found.
Do not check for gas leaks with an open flame.
Use a bubble test. Failure to check for gas leaks
can cause severe personal injury, death or substan-
tial property damage.
NOTICE
NOTICE
WARNING
WARNING
NOTICE
WARNING
Model
Orifice Size
Solo 399
0.339” (8.6 mm)
Throttle
Screw
Brown Wire
Offset Cover Screw
Brown Wire
Ground “Open”
Blue Wire
Blue Wire
Fig. 3: Prestige 399 Gas Valve
