Drazice OKCV 180 Operation And Installation Manual - Page 11
Browse online or download pdf Operation And Installation Manual for Water Heater Drazice OKCV 180. Drazice OKCV 180 19 pages. Tank-type water heaters for
horizontal mounting
Also for Drazice OKCV 180: Operation And Installation Manual (13 pages)
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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 may be dripping off the drain pipe of the safety valve; the pipe must be open into the
air, pointed down; environment temperatures must not drop below zero. When draining the
heater, use the recommended drain valve. First, close the water supply into the heater. For
proper safety valve operation, a backflow valve must be mounted on the inlets pipes,
preventing spontaneous heater draining and hot water penetrating back into the water
main.
Please find necessary pressure values in the below Table 5Table 5. We recommend that the hot water
distribution from the heater was as short as possible to minimise heat losses.
SAFETY VALVE STARTING
PRESSURE (MPa)
0,6
0,7
1
Table 5
Heaters must be provided with a discharge valve mounted on the cold service water inlet to the heater for
potential disassembly or repair.
OKCV 180, OKCV 200
ADMISSIBLE OPERATING
WATER HEATER OVERPRESSURE
(MPa)
0,6
0,7
1
Figure 4
MAX PRESSURE IN COLD WATER
PIPES (MPa)
up to 0,48
up to 0,56
up to 0,8
O – Air outlet valve
U – Shut-off valve
P1 – Safety valve with backflow flap
P2 – Safety valve for heating circuit
M – Manometr
Z – Test valve
V – Drain valve
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