User’s manual
16.2.2.2
Checking of water overheating protection in the heating system
From the operating boiler to put the cables off from the thermo relay 9 (see p.
13.1
, page 24). Boiler should switch
off and display a symbol "02". After eliminating the reasons of the emergent switching off (connecting cables to the
thermo relay back) and pressing a button К6 (RESET) , boiler should automatically switch on.
16.2.2.3
Checking of bypass valve operation
When the boiler is working in the heating mode (see p.
3.2.4
, page 9) it is necessary to shut off a stop valve on the
heating system inlet. Bypass valve 12 (see p.
13.1
, page 24) should direct water bypass from the heating system
through the bypass pipe. After checking it is necessary to open a stop valve on the heating system inlet.
16.2.2.4
Checking of safety valve operation
Checking of safety valve operation 17 (see p.
13.1
, page 24) implies turning the knob on the valve to the left
(counterclowise) in order to let water ejection out of the valve. The valve should close by itself.
16.2.2.5
Air removal valve checking
If a cap of the air removal valve 20 (see p.
13.1
, page 24) is open, there shouldn’t be water leakage. Via the valve
only air should be removed.
16.2.2.6
Checking of gas supply regulator operation
Set water temperature in the heating system 50 °С. During the boiler’s operating it is necessary to look after
temperature values on the display and also gas pressure value in the burner (see section
11
, page 22). When displayed
temperature will be higher for ~ 1-2 °С than a set one, gas supply regulator 8 (see p.
13.1
, page 24) should reduce gas
pressure in the burner (flame height will degrease).
Before switch the boiler on, disconnect one of the cables of the modulator coil of gas supply regulator. An
emergency code "07" will blink on the display, which signals about regulator’s refusal to operate. After eliminating the
reason of boiler’s emergent switching off (connect cable to the regulator back), the boiler will switch on automatically.
16.2.2.7
Ionization plug checking
From the operating boiler to put a cable off from the ionization plug 11 (see p.
13.1
, page 24). Boiler should
switch off and display a symbol "01". After eliminating the reason of boiler’s emergent switching off (connect cable to
the ionization plug back) and pressing a button К6 (RESET), boiler will switch on automatically.
Flame detection is based on the principle of monitoring ionization current. Ionization current is measured by
micro ammeter, consequently connecting it to the circuit of ionization current. Optimal value of the ionization current
is 3…5 μА.
Reasons of reduced ionization current can be the following: «current leakage», low connection with the “ground”
or wrong plugs connection. In this case it is necessary to replace cables of ionization and ignition plugs with each
other. Sometimes low ionization current can be caused by inappropriate requirement of gas-air mixture or appearance
of carbon deposit on the ionization plug while using a boiler.
16.2.2.8
Checking of control devices for combustion products removal
Switch the boiler on, preliminary disconnect an exhaust flue from the boiler. Cover a hub, mounted on the fan’s
pipe with a metal sheet. Boiler should switch off and display a symbol "03" which signals that boiler stops operating
because of the draught lack in the exhaust flue.
After eliminating the reason of boiler’s emergent switching off, and also realizing the blockage by means of the
button К6 (RESET), boiler should automatically switch on. After performing such checking, it is necessary to mount
the exhaust flue back ensuring the joint air- tightness.
16.2.2.9
Checking of CH temperature sensor
Before switching the boiler on, disconnect the cables from the CH temperature sensor 10 (see p.
13.1
, page24).
When trying to start up the boiler in CH mode, it should display a symbol "05" which signals about the refusal of CH
temperature sensor to operate.
After eliminating the reason of boiler’s emergent switching off (connecting cables to the sensor back) boiler
should automatically switch on.
To check the temperature sensor, measure its resistance: R=10 kOhm (at 25 °С).
16.2.2.10
Checking of DHW temperature sensor
Before switching the boiler on, disconnect the cables from the DHW temperature sensor 14 (see p.
13.1
, page 24).
When trying to start up the boiler in DHW mode, it should display a symbol "06" which signals about refusal of the
DHW temperature sensor to operate.
After eliminating the reason of boiler’s emergent switching off (connecting cables to the sensor back) boiler
should automatically switch on.
To check the temperature sensor, measure its resistance: R=10 kOhm (at 25 °С).
