17
Classic LX, RS -
Installation
INST
ALLA
TION
24 COMMISSIONING AND TESTING
A.
ELECTRICAL INSTALLATION
1.
Checks to ensure electrical safety should be carried
out by a competent person.
2.
ALWAYS carry out preliminary electrical system
checks, i.e. earth continuity, polarity, resistance to
earth and short circuit using a suitable test meter.
3.
Refit the control box.
B.
GAS INSTALLATION
1.
The whole of the gas installation, including the meter,
MUST be inspected and tested for soundness, and
purged in accordance with the recommendations of
BS. 6891.
2.
Purging air from the gas installation may be expedited by
loosening the union on the gas service cock on the boiler
and purging until gas is detected.
3.
Retighten the union and check for gas soundness.
INSTALLATION
E
Burner pressure test point
F
Main burner pressure adjuster
G
Inlet pressure test point
H
Gas service cock
WARNING.
Whilst effecting the required gas soundness test and purging air from the gas installation,
open all windows and doors, extinguish naked lights and
DO NOT SMOKE.
25 INITIAL LIGHTING
LEGEND
A
Gas valve control knob
B
Sightglass
C
Thermostat knob
D
Piezo unit ignition
1.
Check that all drain cocks are CLOSED and any valves in
the flow and return lines are OPEN.
Determine the required heat input and fix the adhesive arrow
(supplied in the Hardware Pack) to the data plate on the
control support frame, indicating the intended burner setting
pressure and heat input.
2.
Check that the gas service cock (H) is OPEN and that the
boiler thermostat control knob (C) is OFF.
Deluxe Model (LX)
- Fit the boiler casing but do not fit the
controls casing bottom panel (Frame 26).
Standard Model
- Fit the boiler casing but do not fit the
controls casing pod (Frame 26).
3.
Loosen the screw in the burner pressure test point (E) and
connect a gas pressure gauge via a flexible tube.
4.
Turn the gas control knob clockwise until resistance is felt
and then release. WAIT FOR 3 MINUTES.
5.
Push in and retain fully depressed the gas control knob (A).
Press and release the piezo unit button (D) repeatedly until
the pilot is seen to light through the sightglass (B).
6.
Hold the gas control knob depressed for 15 seconds after
the pilot burner has ignited, then release.
7.
If the pilot burner fails to remain alight at this stage, repeat
the procedure detailed above but wait longer than 15
seconds before releasing the gas control knob.
8.
Check the appearance of the pilot flame to ensure that it
envelops the tip of the thermocouple and is approximately
25mm (1") long. The pilot flame is factory set and no
adjustment is possible. If the pilot flame is incorrect refer to
Frame 35 .
9.
Check that the electricity supply and all external controls
are ON.
10.
Set the boiler thermostat control knob to position 6 and check
that the burner cross-lights smoothly from the pilot flame.
11.
Test for gas soundness around the boiler gas component
joints, using leak detection fluid.
12.
Operate the boiler for 10 minutes to stabilise the burner
temperature.
13.
Check the burner setting pressure against the relevant values
quoted in Table 2, Page 3.
14.
If the burner setting pressure requires adjustment, remove
the silver threaded protection cap on the top of the regulator.
Adjust the main burner pressure adjuster (F) until the required
main burner pressure is achieved.
15.
Set the boiler thermostat control knob to OFF. Remove the
pressure gauge tube and tighten the sealing screw in the
pressure test point. Relight and check for gas soundness at
the pressure test point.
16. Deluxe Model (LX)
- Refit the controls casing bottom panel
and screws.
Standard Model
- Refit the controls pod and tighten the
front fixing screws.
17. Deluxe Model (LX)
- Lower the glass fascia to its closed
position.
Standard Model
- Close the pod door.
Summary of Contents for Classic LXRS 230
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