Weil-McLain 155 Prepare boiler, Remove boiler from crate, GAS-FIRED WATER BOILER - Boiler Manual

2 GAS-FIRED WATER BOILER — Boiler Manual

Prepare boiler

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.

Prepare for propane if operating on propane — Ultra-80 & -105

Ultra-80: DO NOT apply the following instructions to conversion of 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.

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.

Ultra-80-LPboilers are factory-equipped to operate on propane gas.

Figure 2 Installing propane orifice (Ultra-105)

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.

Part number 550-101-233/0903 9