Specifications

Part number 550-100-090/0809
45
g a s -f i r e d w a t e r b o i l e r — Boiler Manual
ADVANCED INSTALLATION
Prepare boiler — convert for propane (continued)
Lift the door away from boiler.4.
Remove the air inlet silencer from the adapter:5.
Models 80 and 105: See a. Figure 121, page 117.
Models 155 and 230: See b. Figure 122, page 118.
Models 299 and 399: See c. Figure 123, page 119.
Disconnect the gas valve electrical plug.6.
See 7. Figure 42, page 44 or Figure 43. Remove the 4 screws securing
gas valve inlet adapter to valve.
Use a 5-mm wrench to remove the three Allen-head screws securing 8.
the gas valve to the venturi (Figure 42, page 44 or Figure 43).
Place orifice in the black rubber grommet in the side of the gas 9.
valve and secure in valve (Figure 42, page 44 or Figure 43).
See Figure 42, page 44 or Figure 43. Inspect the O-ring
between the gas valve and gas valve inlet adapter when-
ever they are disassembled. The O-ring must be in good
condition and must be installed. Failure to comply will
cause a gas leak, resulting in severe personal injury or
death.
Reposition gas valve against venturi and replace (3) Allen-head 10.
screws securing valve to venturi (Figure 42, page 44 or Fig-
ure 43).
See 11. Figure 42, page 44 or Figure 43. Secure gas valve inlet adapter
to gas valve with 4 screws. Make sure the plastic hose is connected
from gas valve to inlet elbow on Ultra-80 and -105.
DO NOT ATTEMPT TO MEASURE VALVE OUTLET
PRESSURE.
The valve could be damaged by manom-
eter fluid contamination. Failure to comply could result
in severe personal injury, death or substantial property
damage.
Connect gas valve electrical plug to valve terminals.12.
Re-attach the air inlet silencer.13.
After installation is complete, attach the propane conversion label 14.
(in conversion kit bag) next to the boiler rating plate.
Replace jacket front panel.15.
Figure 43 Installing propane orifice
(Ultra-155, -230, and -299)
Ultra-399 boilers
Ultra-399 boilers are converted for
propane by adjustment of the gas valve
throttling screw. See instructions on
page 37 of this manual.
Do not perform the propane conversion
of an Ultra-399 boiler without using a
flue gas analyzer. The proper use of a
flue gas analyzer is required to determine
proper gas valve settings. Improper gas
valve settings can cause severe personal
injury, death or substantial property
damage.