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Part number 550-100-400/0119
7
Vent and air piping ( page 16 )
1. The Ultra boiler requires a special vent system, designed for pres-
surized venting. Ultra boilers are rated ANSI Z21.13 Category IV
(pressurized vent, likely to condense in the vent). See instructions
beginning on page 16 .
2. You must also install air piping from outside to the boiler air
intake adapter. The resultant installation is categorized as direct
vent (sealed combustion). Note prevention of combustion air
contamination on
page 16 when considering vent/air termination.
3. Vent and air must terminate near one another and may be vented
vertically through the roof or out a side wall. You may use any of
the vent/air piping methods covered in this manual. Do not attempt
to install the Ultra boiler using any other means.
4. Be sure to locate the boiler such that the vent and air piping can be
routed through the building and properly terminated. The vent/air
piping lengths, routing and termination method must all comply
with the methods and limits in instructions beginning on
page 16 .
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 (2) 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 lag screws securing the 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 fl oor or pallet.
Damage to boiler can result.
Prepare boiler
Prepa re boiler for propane
(when required)
Propane operation
.
Propane-ready boilers have suffi x “LP”
after the model number. All other boilers
require conversion for propane opera-
tion.
Refer to propane conversion instructions
beginning on page 48 .
Failure to comply could result in severe
personal injury, death or substantial
property damage.
Placing fl oor-mounted boilers
1. Set boiler in place and check level.
a. Adjust legs, if necessary to level boiler.
Wall-mounted boilers
1. Boilers can be wall mounted ONLY if using the optional
wall-mount kit available from Weil-McLain. See page 50
for instructions.
®
Series 4
gas-fired water boiler — Boiler Manual
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