Glow-worm Inset BBU50 - Manual (Page 17)

17 221723B
LIGHTING SEQUENCE OF OPERATION
1. Switch on the electrical supply to the boiler
and heating sytsems.
2. Set external controls if fitted, to demand heat.
3. Turn the boiler control thermostat knob
fully clockwise to the maximum setting.
The lighting sequence is automatic as follows:-
4. Approximate 30 second purge.
5. Ignition initiated sparking at electrode
EV1 energised, (Pilot solenoid)
pilot lights.
6. EV2 energised, (Main burner solenoid)
main burner lights.
6 Commissioning
Turn control thermostat knob “A” clockwise until “MAX” is
against the pointer positioned on the control box front cover “F”.
The main burner will light.
Test for gas soundness using a suitable leak detection fluid.
The back boiler is supplied preset to the maximum heat input
but may be adjusted to suit design requirements. Refer to Data
Label or Table 1 for details, Section 1.2.
If adjustment is required, TEN MINUTES after lighting, turn
adjustment screw “G”, anti-clockwise to suit system design heat
input, see diagram 6.1 and 6.2.
Should any doubt exist, the gas rate should be checked at the
gas meter.
The rate of the back boiler should be within the range:
For the BBU 50: 1.40m 3 /h to 1.70m 3 /h,
(49.5ft 3 /h to 60.0ft 3 /h)
Note, if the gas rate is checked, make sure that all other gas
appliances and pilot lights are turned off.
Turn control thermostat knob “A” anti-clockwise to “0”, “Off”
position. Remove pressure gauge and replace test point screw
ensure a gas tight seal is made.
Relight the back boiler by turning thermostat knob “A” clockwise
to “MAX”.
Use the self adhesive arrow from the fittings pack and stick it
against the relevant heat input figure on the Data Label.
Refer to sequence of operation below.
Diagram 6.2
ADJUSTER “G”
GAS
VALVE
CONTROL
FIRE FRONT GAS
SERVICE COCK “D”
(SHOWN IN THE OFF
POSITION)
GAS SERVICE COCK “C”
(SHOWN IN THE OFF
POSITION)
6679
Diagram 6.3
6357
13mm FLAME
DIMENSION
6.2 Testing the Back Boiler Controls
To test the lockout device, turn the boiler on. After about 3
minutes, turn the gas off at the gas service cock, the lockout
device should now operate. This is indicated by the red light
coming on at the reset button.
To restart the boiler, turn on the gas supply at the gas service
cock and press the lockout reset button “E”.
DO NOT ATTEMPT TO RELIGHT UNTIL AT LEAST 3 MINUTES
HAVE GONE BY.
Check that the boiler thermostat control and any external
controls operate the back boiler correctly.
6.3 Clearance of Products
A clearance of products (spillage) test must be carried out after
installation of the back boiler and it's fire.
Before fitting the fire, check that the heat exchanger baffles are
fitted and seated correctly, see Section 4.9.
Details of the necessary tests to be carried out will be found
under “TEST FOR CLEARANCE OF PRODUCTS” in the Fire
Front Installation Instruction Booklet.
Note: This test must only be carried out after the fire front has
been fitted to the back boiler unit.