Lifebreath CAF-02-MB Manual de usuario descargar pdf (Pagina 8)

Shut Off Valves

There are 3 shut off valves required for an

integrated combo system as follows:

• One valve (a) on the cold water side of the

water heater upstream of the heating loop

connection. This valve has the ability to

isolate the hot water (domestic and space

heating) from the household cold water

supply. This valve is required on every water

heater whether or not the water heater is

used for space heating.

• One valve (b) on the hot water supply side

of the heating loop, downstream of its

connection to the domestic water.

• One valve (c) on the return side of the

heating loop upstream of its connection to

the domestic cold water.

The two valves in the heating loop allow the

heating loop to be isolated for service or repair.

Drain Valve

A drain valve is required to allow the heating loop

to be drained for service or repair and to remove

air from the heating loop when commissioning a

system. The drain valve should be near the low

point of the return piping system upstream of the

shut off valve and is preferred to be near the

water heater.

Throttling Valve

The throttling (balancing) valve is used to reduce

the water flow rate and thereby increase the

water temperature drop. This is done to ensure

proper activation of the water heater thermostat.

This valve should be a globe or balancing valve.

Check Valves

A spring loaded check valve is required in the

heating loop to help minimize thermo-siphoning

of hot water throughout the heating loop when

heating is not called for and cold water back

flowing through the heating loop when domestic

hot water is used.The valve will have a water flow

direction arrow marked on it’s exterior surface

and must be installed with that arrow pointing

downstream.

* Check valves should always be installed in a

vertical rise with the flow of water shown.

(a)

(b)

(c)

Supply

Return

SHUT OFF VALVES

CHECK VALVE

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Lifebreath CAF-02-MB Manual de usuario Pagina 8

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