Weil-McLain WM97+70 Specifications download pdf (Page 97)

Part number 550-142-120/0113

– 97 –

WM97+ gas-fired water boiler — Boiler Manual

Annual startup (continued)

The boiler should be inspected and

started annually, at the beginning of

the heating season, only by a qualiﬁed

service technician. In addition, the

maintenance and care of the boiler

designated in Figure 103, page 95 and

explained on the following pages must

be performed to assure maximum

boiler efﬁciency and reliability. Fail-

ure to service and maintain the boiler

and system could result in equipment

failure.

Electrical shock hazard — Turn off

power to the boiler before any service

operation on the boiler except as noted

otherwise in this instruction manual.

Failure to turn off electrical power

could result in electrical shock, causing

severe personal injury or death.

Address reported problems

1. Inspect any problems reported by owner and correct before

proceeding.

Inspect boiler area

1. Verify that boiler area is free of any combustible materials,

gasoline and other ﬂammable vapors and liquids.

2. Verify that air intake area is free of any of the contaminants

listed on page 19 of this manual. If any of these are present

in the boiler intake air vicinity, they must be removed. If

they cannot be removed, reinstall the air and vent lines per

this manual.

Inspect boiler interior & door gaskets

1. Remove jacket front door and inspect interior of boiler.

2. Visually inspect the door gaskets. Make sure all are in good

condition. Obtain replacements if any gasket is damaged.

Door gaskets must be intact, and must provide a

reliable seal. Replace any damaged gasket.

3. Remove the venturi air inlet silencer and clean if necessary.

Reinstall silencer.

4. Vacuum any sediment from the inside of the boiler and

components. Remove any obstructions.

Do not use solvents to clean any of the boiler

components. The components could be damaged,

resulting in unreliable or unsafe operation.

Clean condensate trap

1. See Figure 104.

2. Disconnect top nut that secures the trap body to the boiler

condensate connection (see Figure 71, page 62).

3. Remove the cleanout cap and remove the trap internal parts

as shown.

4. Clean all trap components.

5. Re-assemble trap assembly. Re-install all lower gasket.

6. Make sure the trap ball moves freely when re-inserted.

7. Fill trap with fresh water by pouring into the top of the trap

body. Continue ﬁlling slowly until water begins ﬂowing out

the condensate drain line. Make sure the trap line is unob-

structed and ﬂows freely.

8. Reattach the trap to the boiler condensate outlet. Push the

trap up until fully engaged. Then twist the upper nut clock-

wise to tighten. Check for secure connection.

Figure 104

Condensate trap cleaning

Trap ball

Upper nut

Cleanout cap

Valve seat, O-ring

and gasket

Condensate

drain line

Check all piping for leaks

Eliminate all system or boiler leaks. Continual fresh

make-up water will reduce boiler life. Minerals

can build up in the heat exchanger, reducing heat

transfer, overheating heat exchanger, and causing

heat exchanger failure. Leaking water may also

cause severe property damage.

1. Inspect all water and gas piping and verify to be leak free.

2. Look for signs of leaking lines in the system and in the boiler

and correct any problems found.

3. Check gas line using procedure on page 63.

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Weil-McLain WM97+70 Specifications Page 97

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