Drazice OKC 200 NTRR / BP Kullanım ve Kurulum Kılavuzu - Sayfa 11

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2.3 PLUMBING FIXTURE

Connection of heaters to plumbing fixtures is illustrated on Figure 4 and Figure 6. For

potential disconnection of the heater, the service water inlets and outlets must be provided

with screw coupling Js 3/4". Safety valve is mounted on the cold water inlet identified with a

blue ring.

Each hot service water pressure heater must have a membrane spring loaded with a safety

valve. The safety valve must be easily accessible, as close to the heater as possible. The input

pipes must have at least the same clearance as the safety valve. The safety valve is placed

high enough to secure dripping water drain by gravity. We recommend mounting the safety

valve onto a branch pipe. This allows easier exchange without having to drain the water from

the heater. Safety valves with fixed pressure settings from the manufacturer are used for the

assembly. Starting pressure of a safety valve must be identical to the maximum allowed

heater pressure, and at least 20 % higher than the maximum pressure in the water main. If

the water main pressure exceeds such value, a reduction valve must be added to the system.

No stop valves can be put between the heater and the safety valve. During the assembly,

follow the guide provided by the safety equipment manufacturer.

It is necessary to check the safety valve each time before putting it into operation. It is

checked by manual moving of the membrane from the seat, turning the make-and-break

device button always in the direction of the arrow. After being turned, the button must click

back into a notch. Proper function of the make-and-break device results in water draining

through the safety valve outlet pipe. In common operation, such a check needs to be

implemented at least once a month, and after each heater shutdown for more than 5 days.

Water can drip from the safety valve through the drain pipe; the pipe must be freely open to

the atmosphere, placed vertically and shall be in an environment free of temperatures below

freezing. When draining the heater, use a drain valve. You must first close the water supply

to the heater.

Figure 3

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