Check Functionality Of Safety Devices; Water Flow Temperature Sensor; Water Flow Switch; Minimum Gas Pressure Switch - Rendamax R3 EVO Serie Manual De Uso E Instalación

Commissioning

Check functionality of safety devices

1
2
3
4
EN -
Operation and Installation manual
Check functionality of safety devices
All safety devices have to be checked
on good functioning. Safety devices
on a standard boiler are a water flow
temperature sensor, water flow switch,
minimum gas pressure switch and
ionisation electrode. These devices can
be checked as described below.

Water flow temperature sensor (1)

Disconnect the plug from the sensor
while the boiler is switched on. This
should result in a lockout no. 20.
The lockout should disappear as soon
as the plug is placed back in position,
the boiler will restart.

Water flow switch (2)

Close (slowly!) the valve in the flow
connection to the system while the
boiler is running on minimum load.
When the valve is almost closed and the
water flow is insufficient, the water flow
switch will switch off and the
boiler will go in lockout 164. Open the
5
valve. A manual reset is necessary.

Minimum gas pressure switch (4)

Close the gas shut off valve when the
boiler is in standby position (
the test point on the gas valve (3) while
measuring the gas pressure on the test
point of the gas pressure switch (5).
The boiler will go in lockout no. 132
when the switch off setting is achieved.
Close both test points and open the gas
cock.
6
7
7
Ionisation electrode (7)
Disconnect the plug from the ionisation
electrode while the boiler is running,
the boiler will go in lockout no. 128. The
boiler will try to restart. With the plug
removed, the restart will result in lockout
no. 133.
When the plug is already mounted, the
restart will be successful.
Measuring the ionisation current can
be done by mounting a multi-meter
(set to µA) in between the ionisation
electrode and its electrical connection.
The ionisation current should always be
above 1.51 µA, in normal conditions it
will be 8 µA and above.
Gas tightness check
Check the gas tightness of all sealed
connections with an approved soap or
electronic gas analyzer, for example:
•
Test points
•
Bolt connections
•
Gaskets of mixing system, etc.
Boiler shut down
When the boiler will not be used for
longer periods, shut down the boiler by
b
). Open following procedure:
•
Switch the boiler in standby
operation (
•
Switch off the boiler with the on/off
switch (6)
•
Disable power supply to the boiler
by deactivating the mains isolator
switch in the boiler room
•
Close the gas supply to the boiler.
b
)
39