Strebel S-FX 125, Руководство по установке, эксплуатации и техническому обслуживанию

Страница: 61 / 68

61
Gas Supply & Safeties
The gas pipes must be checked for gas tightness. Also check if the mounting of these pipes is correct, safe and
not damaged. Any built-in safeties should be checked for a correct functioning. Any gas pipe or fitting that have
been opened or adjusted should be checked for leaks.
Heat Exchanger
After the removal of the complete burner unit check if there is any debris and dirt in the heat exchanger. The coils
of the heat exchanger can be cleaned by using a
non-metallic brush. After this the dirt and dust can be removed
with a vac
uum cleaner and by flushing the burner room with water. Don’t forget afterwards to clean the siphon
once again.
Burner
Check the burner surface to see if it has damages, signs of rust and/or cracks. When the burner surface is
damaged the burner must be replaced. The burner can be cleaned by using a soft (non-metallic) brush. The dust
can be removed with a vacuum cleaner or pressurized air.
Burner Door Gasket
If any part of a gasket has discoloured, changed texture, or hardened then, the rubber has cured and/or has
damages, these gaskets must be replaced.
Notice: Only use the gaskets that are supplied by the boiler manufacturer.
Ignition / Ionisation Electrode
When the complete burner is removed, it is very easy to check the ignition electrode.
Check the electrode for any tear/crack and signs of rust. When they are damaged in any manner or rusty, replace
the electrode. Also replace the electrode when there is a crack in the ceramic insulation of the electrode. When
the electrode is replaced, also the gasket must be replaced. The electrode should be replaced annually.
Emory cloth, sandpaper, and any other abrasive material should never be used to clean the electrode.
Fan
When the fan blades are polluted and dirty, carefully clean the blades with a soft brush.
Notice: Do not use too much force on the blades or else the fan might be out of balance and run irregularly, causing
noises and fan failures. Check the fan also for any water damages. In doubt always replace the fan of the boiler.
Condensate Trap
Disassemble the condensate trap and clean every part of it. Check the condensate trap connection of the heat
exchanger for any blocking or pollution and clean it (if necessary). Check the functioning of the condensate trap
by pouring clean tap water in the boiler combustion chamber (when burner door is removed). This water will exit
the heat exchanger by the condensate trap.
When mounting the bottom part of the condensate trap, before commissioning the boiler and/or after
maintenance, the condensate trap must
ALWAYS be completely filled with water.
This is a safety measure: the water in the condensate trap keeps the flue gases from leaking
out of the heat exchanger via the condensate drain.
Water Leakage
The water pressure of the heating installation should be more than 1.0 bar (21 psi) and at a maximum of 6.0 bar
(87 psi) in normal operation. When the water pressure drops below the minimum occasionally, there might be a
water leak. Check the boiler and the complete heating installation for any water leakages and have these repaired.
higher water pressures are allowed with the use of a different relief valve and a pressure switch kit
Exhaust Flue Gas & Air Supply
The flue gas pipes must be checked for gas tightness. Also check if the mounting of these pipes is correct, safe
and not damaged. Check the bottom side of the boiler housing for signs of water leakage and traces of water
coming from the exhaust flue pipes. Check to ensure the flow there are no obstructions within the exhaust flue or
the intake combustion air venting. Check that the exhaust flue has been properly reassemble and sealed before
leaving site.
Checking Non-Return Flap
The non-return flap is installed on the air inlet pipe before the internal combustion fan. Clean the valve and check
the valve is fully moveable and shuts when the fan is not in operation.