Weil-McLain 78 14b Make Final Adjustments, Skim steam boilers, Check boiler for gas-tightseal

Weil-McLain 78 Boiler For Gas, Light Oil, Gas/Light Oil Fired Burners

14b Make Final Adjustments

Skim steam boilers:

Clean all newly install steam boilers to remove oil. Failure to properly clean can result in violent water level fluctuations, water passing into steam mains, or high maintenance costs on strainers, traps and vents. Skim boiler only. Do not clean old piping or leaks can occur.

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to system components can result, causing substantial property damage.

1.Remove 2" plug from 3" x 2" bushing at skim tapping. Provide 2" skim piping from tapping to floor drain.

2.Raise waterline to midpoint of skim piping.

3.Fire burner to maintain temperature below steaming rate during skimming process.

4.Feed in water to maintain water level. Cycle burner to prevent rise in steam pressure.

5.Continue skimming until discharge is clear. This may take several hours.

6.Drain boiler. While boiler is warm but not hot, flush all interior surfaces under full pressure until drain water runs clear.

7.Remove skim piping. Re-insert plug at boiler skim tapping.

8.Close drain cock. Fill with fresh water to normal water line. Start burner and steam for 15 minutes to remove dissolved gases. Stop burner.

9.Check traps and air vents for proper operation.

Determine if water treatment is needed (water boilers only):

Do not use petroleum-based cleaning or sealing compounds in boiler system. Severe damage to system components can result, causing substantial property damage.

Continual make-up water will reduce boiler life. Minerals can build up in sections, reducing heat transfer, overheating cast iron and causing section failure.

For unusually hard water areas or low pH conditions (less than 7.0) consult local water treatment company.

Freeze protection (when used):

1.Use antifreeze especially made for hydronic systems. Inhibited propylene glycol is recommended.

Do not use automotive, ethylene glycol or undiluted antifreeze. Severe personal injury or death can result.

2.50% solution provides protection to about -30°F.

3.Local codes may require back-flow preventer or actual disconnect from city water supply.

4.Determine quantity according to system water content. Boiler water content is listed on page 31. Percent of solution will affect sizing of heat distribution units, circulator and expansion tank.

5.Follow antifreeze manufacturer’s instructions.

Check boiler for gas-tight seal:

		Boiler must be sealed gas-tight
		to prevent possible flue gas
		leakage and carbon monoxide
		emissions, resulting in severe
		personal injury or death.
	1. Remove boiler jacket side and top panels.
	2. Start burner. Observe all sealing points and
	chalk mark any not gas-tight.
	3. To seal all chalk-marked areas:
	a. use silicone sealant on section flueways.
	b. check gaskets and sealing rope placement.
	4. Reinstall all jacket panels.
26		Part No. 550-141-705