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GAS-FIRED WATER BOILER SERIES 2 — Boiler Manual
Part number 550-100-026/0404
9
Remove boiler from crate
Cold weather handling — If boiler has been
stored in a very cold location (below 0°F) before
installation, handle with care until the plastic
components come to room temperature.
1. The Ultra boiler is generally easier to handle and maneuver
after removing from crate.
2. After removing outer shipping carton from boiler,
REMOVE jacket front door by loosening two knurled-
head screws at lower front. Removing the door will prevent
possible damage to the door during handling.
3. To remove boiler from pallet (after removing jacket front
door):
a. Remove the four lag screws securing shipping brackets.
b. Unscrew the two rear boiler legs and remove the
shipping brackets.
c. Replace legs.
d. Discard the cardboard protector insert on the rear of
the boiler.
Do not drop boiler or bump jacket on floor or
pallet. Damage to boiler can result.
Ultra-80 Series 1 and 2 ONLY
Propane operation
Ultra-80: DO NOT apply the propane
conversion instructions in this manual to
Ultra-80 boilers. Follow the instructions
provided with the optional propane conversion
kit.
The propane conversion kit is NOT included
as standard equipment for the Ultra-80.
Ultra-80-LP boilers are factory-equipped
to operate on propane gas.
Ultra-310 Series 1 Boilers ONLY
Propane operation
Ultra-310 Series 1: DO NOT apply the
propane conversion instructions in this manual
to Ultra-310
Series 1 boilers. Follow the
instructions provided with the optional propane
conversion kit.
The propane conversion kit is NOT included
as standard equipment for the Model
Ultra-310
Series 1.
Prepare boiler
2
Figure 2 Installing propane orifice (Ultra-105 boiler ONLY)
Ultra-105 Series 1 and 2 ONLY
Prepare for propane operation
Do not apply the following to conversion of a boiler already
installed and connected to gas supply. 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 as described under
“Startup,” Section 6 of this manual. See separate natural to
propane conversion instructions for conversion of an existing
boiler.
You must install the propane orifice to fire the Ultra boiler on
propane. Verify when installing that the orifice size marking
matches boiler size. Failure to comply could result in severe
personal injury, death or substantial property damage.
1. With boiler on its back, remove jacket front door by removing two knurled
head screws at lower front. Then lift door away from boiler.
2. Disconnect the gas valve electrical plug.
3. Remove the 4 screws securing gas valve inlet adapter to valve.
4. Remove (3) TORX screws securing gas valve to venturi (Figure 2).
5. Locate propane orifice disc from conversion kit bag. Verify that the stamping
on the orifice disk matches the boiler size. Place orifice in the black rubber
grommet in the side of the gas valve and secure in valve (Figure 2).
6. Reposition gas valve against venturi and replace (3) TORX screws securing
valve to venturi. Secure gas valve inlet adapter to gas valve with 4 screws.
Make sure the plastic hose is connected from gas valve to inlet elbow.
Inspect the O-ring between the gas valve and gas valve inlet
adapter block whenever 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.
7. DO NOT attempt to adjust gas valve outlet pressure.
8. Connect gas valve electrical plug to valve terminals.
9. After installation is complete, attach the propane conversion label (in
conversion kit bag) next to the boiler rating plate.
10. Replace jacket front panel.
See the next page for Ultra-310
Series 2 and all Ultra-155 and
Ultra-230 model propane
instructions.