Intergas Compact HRE 18 OV Installation, Service And User Instructions Manual - page 37
Intergas Heating Ltd
37
12.3 Assembly
CAUTION
When fitting the various seals check for damage, hardening, tears or
hairline tears and/or discoloration. Where necessary fit a new seal.
Also check whether seals are still correctly positioned.
Failure to fit the sensors S1 and/or S2, or to fit them correctly, can
result in serious damage.
Warranty will be void by not correctly replacing removed parts!
1. Check that the seal around the front cover is correctly installed. Place the front
cover on the heat exchanger and secure it using the socket head screws plus
serrated lock washers. Tighten the socket head screws equally hand-tight,
working crosswise.
2. Fit the gas connection below the gas valve.
3. Fit the connector to the fan and the ignition unit to the gas valve.
4. Fit the condensate drain by sliding on to the exchanger outlet stump (1) with the
condensate trap connection still in front of the base tray. Then turn it to the left (2)
and push it downwards into the condensate trap connection (3). Make sure in
doing this that the back of the condensate drain pan comes to rest on the lug at
the back of the base tray (A).
5. Fill the condensate trap with water and fit it to the connection below the
condensate drain pan.
6. Slide the flue pipe, turning it anti-clockwise, with the top around the flue adapter,
into the top cover. Insert the bottom into the condensate drain pan and tighten the
coupling nut clockwise.
7. Open the gas tap and check the gas connections below the gas valve and on the
mounting bracket for leakage.
8. Check the CH and, if applicable, the water pipes for leakage.
9. Switch on the mains power.
10. Switch the appliance on with the key.
11. Check the front cover, the fan connection on the front cover and the flue pipe
components for leakage.
12. Check the gas/air adjustment.
13. Fit the casing, tighten the two screws left and right of the display and close the
display cover.
14. Check the heating and, if applicable, the hot water supply.
12.4 Combustion
During routine servicing, and after any maintenance or change of part of the
combustion circuit the following must be checked:
•
The integrity of the flue system and the flue seals, as described in § 8.5 and the
British Standards codes of practices, specifically BS 5440.
•
The integrity of the boiler combustion circuit and the relevant seals, as described in
§ 12.3.
•
The operational (working) gas inlet pressure at maximum rate, as described in
§ 10.7.2.
•
The combustion performance, as described in § 10.7.2. and § 10.8.
BS 6798: 2009 Specification for installation and maintenance of gas-fired boilers of rated
input not exceeding 70 kW net advises that:
•
The person carrying out a combustion measurement should have been assessed
as competent in the use of a flue gas analyser and the interpretation of the results;
•
The flue gas analyser used should be one meeting the requirements of BS7927 or
BS-EN50379-3 and be calibrated in accordance with the analyser manufacturers’
requirements, and
•
Competence can be demonstrated by satisfactory completion of the CPA1 ACS
assesment, which covers the use of electronic portable combustion gas analysers in
accordance with BS7967, Parts 1 to 4.
Connect the flue gas analyser to the flue gas sampling point (X) and check combustion
as described in § 10.7. If the combustion reading is greater than the acceptable value
and the integrity of the complete flue system and combustion circuit seals have been
verified and the inlet gas pressure has been verified, proceed as in § 10.7.2.