29
Henrad SE FF
- Installation
INSTALLATION
B. Gas Installation
1. The whole of the gas installation, including the meter, should be
inspected and tested for soundness and purged in accordance
with the recommendations of BS. 6891.
2. Purge air from the gas installation by loosening the gas cock
union and purge until gas is smelled.
3. Retighten the union and test for gas soundness.
45 GAS CONNECTION
INST
ALLA
TION
WA
RNING.
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.
Refer to Frame 2 for details of the position of the gas connection.
A MINIMUM working gas pressure of 20 mbar (8" w.g.) must be
available at the boiler inlet with the boiler firing. Refer to Frame
47 or 'Servicing' for details of the pressure test point position.
Extend a gas supply pipe NOT LESS THAN 15mm O.D. to the
boiler and connect to the gas service cock, situated at the
bottom right hand side of the boiler.
The connection MUST be from the RHS rear of the boiler and
from either ABOVE or BELOW.
Do not route the pipe behind
the control box.
A. Electrical Installation
1. Checks to ensure electrical safety should be carried out by a
competent person.
2. ALWAYS carry out the preliminary electrical system checks, i.e.
earth continuity, polarity, resistance to earth and short circuit, using
a suitable test meter.
46 COMMISSIONING AND TESTING
Ensure that the gas supply pipe does not foul the boiler casing.
Note.
If the pipe run from the meter to the boiler is greater than
3m (10') 22mm O.D. pipe must be used.
To facilitate connection, it is recommended that the gas service
cock is not removed from the gas control valve.
A 1/2" BSP x 15mm connector, pre-fitted with a short stub
connection, should be screwed into the cock, using a suitable
sealant.
IMPORTANT. The gas service cock contains a non-metallic seal
so must not be overheated when making capillary connections.
47 INITIAL LIGHTING
plastic cover and turn the screw CLOCKWISE to
reduce the
pressure or ANTICLOCKWISE to
increase the pressure. Refit
the cover.
15. Set the thermostat knob (B) to OFF.
16. Switch the electricity supply OFF.
17. Remove the pressure gauge and tube. Replace the sealing
screw in the pressure test point. Ensure a gas tight seal is
made.
18. Refit the boiler front and bottom panels, using the screws
previously removed.
19. Close the controls pod door.
LEGEND
A
'Burner on' neon
B
Thermostat knob
C
Gas service cock
D
Inlet pressure test point
E
Burner pressure test point
F
Burner pressure adjuster
1.
Check that the system has been filled and that the boiler is not air locked
- air in the system could trip the dry fire ''stat (H)
2.
Check that all the drain cocks are closed and any valves in the flow and
return are open.
3.
Check that the electrical supply is OFF.
4.
Check that the flue 'stat (L) is calling for heat - press the reset button.
5.
Refit the boiler sealing panel - refer to Frame 21.
6.
Check that the gas service cock (C) is ON and that the boiler thermostat
knob (B) is OFF.
7.
Check that the dry fire thermostat (H) and overheat thermostat (J) are
calling for heat - press the reset buttons.
8.
Remove the screw in the burner pressure test point (E) and connect a
gas pressure gauge via a flexible tube.
9.
Switch the electricity supply ON and check that all external controls are
calling for heat.
10. Set the boiler thermostat knob (B) to position 6. The gas control solenoid
valve should open and the spark commence, continuing until the burner
is established.
11. Check that the burner lights smoothly and that the 'Burner on' neon
(A) illuminates. If this does not occur within 10 seconds, turn the
thermostat knob to OFF, wait for 5 seconds then repeat step 10.
If the burner still does not light refer to the 'Fault Finding' section.
12. Test for gas soundness around ALL boiler gas components, using leak
detection fluid.
13. Operate the boiler for 20 minutes to stabilise the burner temperature.
14. The boiler is spot rated. Check that the burner pressure corresponds to
the setting given on the data badge, located at the RHS of the boiler
casing. Adjust as necessary via the adjuster screw (F). Prise aside the
G
Fan pressure test point (Hi)
H
Dry fire thermostat reset button
I
Fan pressure test point (Lo)
J
Overheat thermostat reset button
K
Flue gas sampling point
L
Flue 'stat reset button (behind sealing panel)
Note.
The boiler is shown with the front panel
removed and the controls drop-down door open.
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