Mark GSW+ 30, Technical Manual

Page: 27 / 32

Part Work to be carried out
Boiler body Check the sealing of the front plate. Inspect the heat
exchanger tubes. Inspect the isolation on the front
and back plate of the heat exchanger. Damaged or
hardened seals must be replaced. Clean the inside of
the heat exchanger with a stiff brush.
Heat exchanger Remove the exhaust vane window and clean it with
a vacuum cleaner of air syringe. Check the heat
exchanger for leaks.
Expansion tank Do not open the filler cap when the unit is still hot.
Risk of severe burns!
Check the level when the unit is off and cold. The
level must touch the filler neck. If necessary, fill
it with a monoethylene-glycol solution (-15 °C)
provided with corrosion inhibitors.
Pump Check that the pump is functioning. Pump failure
is detected by the water pressure sensor. In an
exceptional case, the pump may be stuck. This can
be solved by taking the cap on the front of pump off
and then getting the pump started by turning a flat
screwdriver clockwise. Then attach the protective
cap again.
Combustion Measure the O
2
/CO
2
amount and the flue gas
temperature. Verify that the measured values of the
data match the data that is presented on page 23. If
necessary, adjust the setting in accordance with the
instructions on page 23. Check the flame statue
visually through the sight glass. The flame should be
stable, blue in color with orange dots (maximum
load). During the exhaust gas analysis the end of the
probe must be located in the middle of the flue gas
pipe.
Condensate pump When using a condensate pump (3100587) with
condensation neutralization kit (3100586) the
cartridge needs to be replaced annually.
27