Initial Lighting - Keston HEAT 2 45 Installation & Servicing

2.30 INITIAL LIGHTING

1. Check that the system has been filled and the boiler is
not air locked - air in the boiler could damage the heat
exchanger. For this reason the air vent located in the left top
side must never be shut off.
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 condensate trap with water before putting the unit
into operation (see Section 3.7 for condensate trap removal).
5. Check the indication on the pressure gauge. If the pressure
is less than 1 bar the installation should be filled up first
(sealed system only).
Max Rate ± 0.5%
Min Rate ± 0.5%
OPERATING SEQUENCE
Demand On
& Temp. <Set point & Anti-cycle
Fan off. Pump off
Installation & Servicing
SECTION 2 - INSTALLATION
Keston Heat2 ~ Flue CO
45
9.5
8.7
Standby
yes
Heat Demand by varying Fan Speed
no
done?
yes
Standby
6. Switch the electricity supply ON and check that all the
external controls are calling for heat. Check boiler is set for
winter operation - see boiler user interface basic operating
instructions.
7. The boiler will commence the ignition sequence. If after 5
attempts the boiler has failed to light then it will lock out.
Press the reset button to restart the ignition sequence.
8. Operate the boiler for 10 minutes and check the gas
rate (Table 1). You should be able to read at least 90%
of the nominal. If this is not possible contact the boiler
manufacturer.
% measurements (hot condition)
2
55 45P
9.7 10.8
8.7 9.9
Heat demand on?
yes
Pump On
Temp. < setpoint?
yes
Fan On
Fan Pre-purge
Spark Generator On
Gas Valve On
3s Ignition Period
Flame detected?
yes
Soft Start
Spark Generator Off
1st Stabilisation Period
Burner Output controlled relative to
Burner On
Demand
off or Temp. >setpoint?
yes
Gas Valve Off
Pump Overrun
Heat Demand Off?
55P
10.7
9.9
no
no
no
no
no
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