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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 a recommended
drain valve. First, close water inlet into the heater.
Find necessary pressure values in the following
table.
For proper safety valve operation, a backflow valve
must be mounted on the inlet pipes, preventing spontaneous heater draining and hot water penetrating back into the
water main.
When assembling the security equipment, follow ČSN 06 0830.
RECOMMENDATIONS:
To set the pressure control valve correctly, we recommend that the pressure in the tank was 20% lower
than the opening overpressure of the safety valve.
We recommend that the hot water distribution from the heater was as short as possible to minimise heat losses.
CONNECTION OF COMBINED HEATER TO HOT WATER HEATING SYSTEM
8.
(Fig. 1, 2)
It is recommended to install stop valves on the heating water inlet and outlet (for possible dismantling of
the heater). The valves have to be as close to the heater as possible to avoid higher thermal losses.
9.
ELECTRIC INSTALLATION
The electric wiring scheme is attached to the water heater
on the side of the electric installation guard.
Connection, repairs, and wiring inspections may only be
implemented by a company (person) authorised to such
activity.
Expert connection must be confirmed on the warranty
certificate.
The heater is connected to the 230 V/50 Hz electrical
network using a fixed moving conductor with a switch that
turns off all network poles and the circuit breaker
(protector).
Installations in bathrooms,
showers must comply with ČSN 33 2000-7-701.
The degree of protection of electric parts of the heater is IP 44.
Respect the rules of protection against electrical injuries in accordance with ČSN 33 2000–4-41.
10.
PUTTING THE HEATER INTO OPERATION
After connecting a heater to the water main, the hot water heating system, the electric network, and after testing its
safety valve (based on the valve manual attached), the heater may be put into operation.
Procedure:
a)
Check both water and electric installation; for combined heaters, check the installation to a hot water
heating system. Check proper placement of operating and safety thermostat sensors. The sensors must be
inserted all the way in; first the operating and then the safety thermostat.
b) Open the hot water valve on the combination faucet;
Safety valve
starting pressure
umer omats, rest rooms and
Admissible operating
water heater
(MPa)
pressure (Mpa)
0.6
0.7
1
6
Max. pressure in
the cold water pipe
(Mpa)
0.6
do 0.48
0.7
do 0.56
1
do 0.8
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