Weil-McLain WM97+70 Specifications download pdf (Page 101)

Part number 550-142-120/0113

– 101 –

WM97+ gas-fired water boiler — Boiler Manual

Check boiler relief valve

1. Inspect the relief valve and lift the lever to verify ﬂow as in the

following warnings, excerpted from a relief valve manufac-

turer’s warning label. Before operating any relief valve, ensure

that it is piped with its discharge in a safe area to avoid severe

scald potential.

2. Read page 39 before proceeding further.

3. Follow instructions below or perform procedures per relief

valve manufacturer’s printend instructions.

Safety relief valves should be reinspected AT LEAST

ONCE EVERY THREE YEARS, by a licensed plumb-

ing contractor or authorized inspection agency, to

ensure that the product has not been affected by cor-

rosive water conditions and to ensure that the valve

and discharge line have not been altered or tampered

with illegally. Certain naturally occurring conditions

may corrode the valve or its components over time,

rendering the valve inoperative. Such conditions are

not detectable unless the valve and its components

are physically removed and inspected. This inspec-

tion must only be conducted by a plumbing con-

tractor or authorized inspection agency — not by

the owner. Failure to reinspect the boiler relief valve

as directed could result in unsafe pressure buildup,

which can result in severe personal injury, death or

substantial property damage.

Following installation, the valve lever must be

operated AT LEAST ONCE A YEAR to ensure that

waterways are clear. Certain naturally occurring

mineral deposits may adhere to the valve, rendering

it inoperative. When manually operating the lever,

water will discharge and precautions must be taken

to avoid contact with hot water and to avoid water

damage. Before operating lever, check to see that a

discharge line is connected to this valve directing

the ﬂow of hot water from the valve to a proper

place of disposal. Otherwise severe personal injury

or property damage may result. If no water ﬂows,

valve is inoperative. Shut down boiler until a new

relief valve has been installed.

4. After following the above warning directions, if the relief

valve weeps or will not seat properly, replace the relief valve.

Ensure that the reason for relief valve weeping is the valve and

not over-pressurization of the system due to expansion tank

waterlogging or under-sizing.

Review with owner

1. Review the User’s Information Manual with the

owner.

2. Emphasize the need to perform the maintenance

schedule specified in the User’s Information

Manual (and in this manual as well).

3. Remind the owner of the need to call a licensed

contractor should the boiler or system exhibit

any unusual behavior.

4. Remind the owner to follow the proper shutdown

procedure and to schedule an annual startup at

the beginning of the next heating season.

Reinstall jacket door after

servicing

Reinstall boiler jacket front door after start-up or

servicing. The boiler front door must be securely

fastened to the boiler to prevent boiler from drawing

air from inside the boiler room. This is particularly

important if the boiler is located in the same room

as other appliances.

Inspect boiler jacket door gaskets. Gaskets must be

in good condition, with no tears or gaps. Replace if

necessary.

Failure to keep the door securely sealed and fastened

could result in severe personal injury or death.

Annual startup (continued)

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Weil-McLain WM97+70 Specifications Page 101

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