
33
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Installation & Servicing
INSTALLATION
Smoke sampling point
im
a 7237
1
40 GENERAL CHECKS
Make the following checks for correct operation.
1. The correct operation of ANY secondary system controls
should be proved. Operate each control separately and
check that the main burner or circulating pump, as the
case may be, responds.
2. Water circulation system;
a. With the system HOT examine all water connections for
soundness.
b. With the system still HOT, turn off the gas, water and
electricity supplies to the boiler and drain down to
complete the flushing process.
c. Refill and vent the system, clear all air locks and again
check for water soundness.
d. Balance the system.
3. Check the condensate drain for leaks and check it is
discharging correctly.
4. Finally set the controls to the User's requirements.
41 HANDING OVER
Routine Operation
Full instructions covering routine lighting and operation of the
boiler are given in the User's Instructions. Draw the attention
of the boiler owner or their representative to these
instructions. Give a practical demonstration of the lighting
and shutting down of the boiler.
Describe the function of the boiler and system controls and
show how they are adjusted and used.
Hand these Installation and Servicing/User Instructions and
Log book to the customer and request him to keep them in a
safe place for ready reference.
IMPORTANT. Point out to the owner that the boiler must have
regular maintenance and cleaning, at least annually, in order
to ensure reliable and efficient operation. Regular attention
will also prolong the life of the boiler and should preferably be
performed at the end of the heating season.
After servicing, complete the service section of the Log book
and return to the owner or their representative.
Recommend that the contract for this work should be made
with the regional gas authority or a CORGI registered heating
installer, or in IE a comptent person.
39 BURNER PRESSURE ADJUSTMENT
The following burner pressure adjustment must be followed when service
replacement of a gas valve is required. This procedure should also be
followed to check if adjustment is required during commissioning and
servicing.
1. Unscrew the sampling point cap and insert the analyser sensor.
2. In Test mode (see Frames 27 & 32) set burner 1 to low with all other burners
OFF.
3. Read the percentage of CO
2
, which must be between 8.8 and 9.0%. If the
reading is not between these values, then adjustment of the gas valve is required.
Note.
If the CO
2
reading is very low, check for blockages on the burner, flue and heat exchanger.
4. To adjust the gas valve using screw 'A', first remove the protective cap using a 'high' torque tool. By
turning the adjustment screw 'A' clockwise the CO
2
% increases, while it decreases anti clockwise.
5. Switch burner 1 OFF and repeat procedure for remaining burners.
A
ima 7238
4
INST
ALLA
TION