INSTALLATION
27 INITIAL LIGHTING
1.
Check that the system has been filled and that the boiler
is not air locked - air in the system could trip the overheat
thermostat.
2.
Check that all the drain cocks are closed and any valves
in the flow and return are open.
3.
Check that the GAS SERVICE COCK IS ON.
4.
Fill the siphon beaker with water before putting the unit
into operation (see frame 32 for siphon removal).
Check the indication on the pressure
gauge. If the pressure is less than 1 bar, the installation
should be filled up first.
5.
Switch the electricity supply ON and check that all
external controls are calling for heat.
6.
The gas control solenoid valve should open and ignition
commence, continuing until the burner is established.
7.
Test for gas soundness around ALL boiler gas
components, using leak detection fluid.
8.
Operate the boiler for 20 minutes to stabilise the burner
temperature.
9.
The boiler is preset at the factory, therefore no
adjustments should be necessary. However, if problems
are experienced refer to Frame 31.
28 GENERAL CHECKS
A number of adjustments can be carried out on the boiler. These adjustable potentiometers are located behind the control
panel cover. Adjustment of these meters to the desired value will be dependant upon the type of installation.
Supply
temperature
Hot water
storage temperature
Partial load
Test switch
1.
Supply temperature
Using the upper trimming potentiometer, indicated with a
radiator, to adjust the central heating water temperature.
This temperature can be adjusted between 40 ˚C to 90 ˚C.
2.
Storage temperature hot water
Only used when fitted with integral DHW calorfier.
3.
Partial load
Use the potentiometer to adjust the maximum
power. The highest adjustment corresponds with a 100%
capacity, the lowest adjustment corresponds with a 30%
capacity (refer to table 1).
You will also find a test switch on the control panel, indicated
with a chimney sweep symbol. During normal operation this
switch has to be in the “0”- position.
For service purposes the test switch can be put in the upper
position. The unit will then be heated at maximum power.
To burner
Gas supply
Burner pressure
measuring point
Dynamic
pressure from
fan connection
Burner pressure
adjusting screw
(behind cover)
Inlet pressure
measuring point
211115
Honeywell gas
control valve
499003 UK
1
2
90
40
10
1
10
1
11kW
211076
Maximiser SE
- Installation
20
