Specifications

Part number 550-100-090/0809
g a s -f i r e d w a t e r b o i l e r — Boiler Manual
44
Prepare boiler — convert for propane
Prepare boiler for propane
(when required)
Propane operation
Ultra boilers must be converted for propane
operation unless specically manufactured
for propane
. Propane-ready boilers have suffix “LP”
after the model number. All other boilers require
conversion for propane operation.
Ultra-80 natural gas boilers require installation of a
burner in addition to an orifice change. DO NOT use
the instructions in this manual for these boilers. Use
only the instructions included in the special-order
conversion kits.
Converting existing natural gas-red boiler for
propane
— For a boiler already installed, you must
turn off gas supply, turn off power and allow boiler
to cool before proceeding. You must also completely
test the boiler after conversion to verify performance
and start up the boiler following instructions begin-
ning on page 31 of this manual.
High altitude installations — For installations
more than 5,500 feet above sea level, obtain the high
altitude propane orifice kit..
Verify orice size — See Figure 41. Verify when
installing that the orifice size marking matches boiler
size. Use only the special-order high altitude orifice
for altitudes above 5,500 feet.
Failure to comply could result in severe personal
injury, death or substantial property damage.
Installing propane orifice
If boiler is already installed — You must turn off elec-
trical supply to the boiler and close the external manual
gas shut-off valve to isolate the boiler during conversion.
Allow the boiler to cool if it has been operating. Following
conversion of an installed boiler, follow all instructions
in this manual to start up the boiler and verify operation
of the boiler and all system components.
Locate propane orifice disc from conversion kit bag.1.
Verify that the stamping on the orifice disk matches the model 2.
size (see Figure 41).
With the new boiler on its back, remove jacket front door by re-3.
moving two knurled head screws at lower front.
Orifice identificationFigure 41
Installing propane orifice Figure 42
(Ultra-105 or Ultra-80LP ONLY)