Supplied By www.heating spares.co Tel. 0161 620 6677
Mechanical connection of the valve:
the HCW output from the boiler is connected to the input of the electric-motor-driven
three-way valve; if the drive motor is inactive (has no voltage), the outputs from the valve to the boiler and to the heating circuit
must be closed. If a three-way valve is used that has not been supplied by the boiler manufacturer, the electric and water
connections must act and be oriented exactly as described here!!!
If the three-way valve used has no switchover contact, the DHW heating may be with the reduced power (if the switch is set to the
"one flame" icon) and the time of the heating up will be unnecessarily long. The maximum power input of the three-way valve
can be up to 10 W, the pump's power input up to 100 W:
4. Description of Controls
(Cf. Fig. 3a, 3b)
Sensors of the emergency thermostat, HCW operation regulators and the HCW pump thermostat are in the boiler body near the
HCW outlet. The emergency thermostat and the HCW pump thermostat are located on the left hand side, on the service part of the
control panel. The emergency thermostat is equipped with a reset button and range for temperature setting. The reset button can
be pressed when the HCW temperature setting has been reduced.
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The HCW pump thermostat is set to 0°C by a wire locking clamp. The recommended setting is 55°C.
Next to the thermostat there is the electric fuse.
After the safety elements' response (emergency and flue-gas thermostat), the boiler's operation can only be re-started
after identifying the reasons for their activation. The boiler must not be operated if the safety elements are disabled
or replaced with elements different form those specified by the manufacturer. These elements must also be checked
after each servicing on them.
5. Boiler Operation
5.1. Boiler Preparation and Start
Check water pressure on the boiler pressure gauge. Turn the gas supply valve on. Plug the boiler's power cord into the socket. Set
the HCW and DHW thermostats to about one half of their ranges. Put the SUMMER/WINTER switch to the WINTER position.
Put the main switch on. The boiler is ignited and heats up the DHW, then HCW.
Check the boiler for gas leaks when operated (e.g., by a testing foam) – if any leaks are found (caused by transportation), they
must be sealed and the check repeated.
At the end of this procedure, the boiler's power output is checked and, if necessary, adjusted by setting the gas pressure on the gas
armature.
Such setting is done by the controls on the combined gas armature (cf. Fig. 5a, 5b), in the order: maximum (i.e., rated), reduced
(only for 20, 30, 40, 50 KLO). The pressure us measured by a "U" manometer (against the atmospheric pressure).
Before setting, switch the boiler off and unplug its power cord. Then:
–
Remove the plugs (A - Fig. 5a, 4a - Fig. 5b)
–
Unfasten the closing screw (2 - Fig. 5a, 6 - Fig. 5b) of the gas output pressure measurement point and insert the "U"
manometer's tube.
Full Power (all types))
–
Start the boiler and let it run at full power, heating up either DHW or HCW. The measurement should not be interfered with
by switching off when the pre-set temperature of water is achieved.
–
Turn the adjustment screw (B - Fig. 5a, 4b - Fig. 5b) to set the gas pressure 125 mm water column for natural gas, 270 mm
water column for LPG.
The gas pressure is increased when the screw is turned clockwise.
Reduced Power (only 20, 30, 40, 50 KLO)
–
Set the power switch ("one flame" or "two flames" icon) to reduced power ("one flame");
–
Turn the screw (C) counter-clockwise to set the left extreme position – for minimum power output.
–
Turn the knob (D) on the automatic part: a 55 mm water column for natural gas, 130 mm water column for LPG.
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