PLUS LINE
A4 Water heater start-up
Filling the inner (domestic water) tank
Filling the outer (boiler water) tank
•Inner tank must be completely filled and pressurized before pres- surizing outer tank.
•Never use water heater unless inner and outer tanks are completely filled with water.
1.Close domestic water drain valve.
2.Open domestic water isolation valves for water heater.
3.Vent air from inner (domestic water) tank by opening nearest hot water faucet. Fill domestic water tank completely by allowing water to run until there is a constant flow of water.
4.Close hot water faucet.
•Inner tank must be completely filled and pressurized before pres- surizing outer tank.
•Never use water heater unless inner and outer tanks are completely filled with water.
1.Close boiler water drain valve at boiler water outlet of water heater.
2.Open water heater’s boiler water isolation valves.
3.Allow air to escape from outer (boiler water) tank by opening cap “A” (see Figure 7) on automatic air vent, located on top of water heater. See the NOTICE below.
Figure 7 | A |
Open cap on air vent to allow air | B |
to escape from outer tank |
For proper operation of the water heater, always leave vent cap unscrewed one full turn.
The
4.Follow instructions furnished with boiler to fill with water.
5.When tank is full, air will stop escaping, and air vent will close. If air vent does not seat properly (i.e., water leaks out), remove cap “A”. Briefly push in valve “B” (see above) and release it to clean valve seat. Screw cap “A” on completely, then unscrew one turn.
6.If antifreeze is used in boiler water, check concentration. Boiler water (including addi- tives) must be practically
Do not use automotive, ethylene glycol or
16 | Part Number |
