Weil-McLain PLUS LINE PLUS-E017-A/1206 Manual Do Utilizador

Part Number PLUS-E017-A/1206

21

   • Installation   • Start-Up   • Usage   • Maintenance   • Parts

See

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Drain water heater if it will be shut off and exposed to freezing temperatures. Freezing water

will expand and may damage water heater.
If  boiler  water  contains  sufficient  antifreeze,  then  only  the  domestic  water  needs  to  be

drained.
If boiler water does not contain sufficient antifreeze, then the boiler water and the domestic

water must be drained.

If antifreeze is used in boiler water, check concentration. Boiler water (including additives)

must be practically non-toxic, having toxicity rating or class of 1, as listed in

. Inhibited propylene glycol is recommended. Follow antifreeze

manufacturer’s instructions.

Close boiler water isolation valves and relieve pressure to below 1 psi in

outer tank before draining inner tank to prevent damage to inner tank.

See piping drawings, pages 9–12.
1.  Disconnect power supply to water heater.

•  If outer (boiler water) tank pressure is greater than 1 psig, relieve boiler pressure to

less than 1 psig, and close isolation valves before proceeding.

2.  Close cold water supply isolation valve.
.  Remove cap and connect a hose to domestic water drain valve. Hose should extend to drain

at floor level to allow siphoning of domestic water tank.

.  Open union on domestic water outlet or hot water faucet at highest point above heater.
.  Open domestic water drain valve to start siphoning.
.  When draining is complete, close union or hot water faucet and domestic water drain

valve.

Do not use automotive, ethylene glycol or petroleum-based antifreeze. Do

not use any undiluted antifreeze. This can cause severe personal injury,

death or substantial property damage if ignored.

Water from opened drain valves, unions and other connections may be

extremely hot. To avoid severe personal injury, death or substantial property

damage:
•  Tighten all drain hose connections.
•  Direct hot water away from all persons.

See piping drawings, pages 9–12.
1.  Disconnect power supply to water heater.
2.  Close boiler water isolation valves between water heater and boiler.
.  Connect hose to boiler water drain valve at water heater. Open and drain water to a safe

place.

.  To speed draining, loosen air vent on top of tank.
.  When draining is complete, close drain valve and retighten air vent.

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