Certikin MB35S, Operating, Installation And Servicing Instructions

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Condensing Pool Heater
27
22/12/08
Gas Valve
( See Fig.14.3 )
 Remove the Ignition Control, see above.
 Release the Gascock by undoing the four shoul
der bolts holding it to the Gas Valve.
 Remove the Offset tube from the Gas Valve and
unscrew the Offset Connector and transfer to the
new Gas Valve.
 Release the Gas Valve from the Venturi by
undoing three screws. (
See Fig.14.3 )
IMPORTANT Ensure the rubber seal (and orifice if
Propane) is transfered from the old Valve and placed
between the Venturi and Gas Valve before assembly.
 Replacement is the reverse.
 Fire the Heater and check for gas leaks.
 After five minutes check the rate and combustion
is correct to the Datatable. (inside cover). Adjust
using the throttle on the Gas Valve,
(See Fig. 14.3) .
Fan
( See Fig.14.2 )
 Remove the two electrical connectors on the Fan.
 Remove the two screws holding the Venturi to the
Fan.
 Undo the four nuts holding the Fan to the Heat
Exchanger and withdraw. (
See Fig.14.2 )
 Transfer the Venturi gasket to the new fan.
 Replacement is the reverse.
Venturi
( See Fig.14.2 )
 Remove the Ignition Control and Gas Valve, see
above.
 Pull off the Air Tube ( See Fig.14.3 )
 Undo the two screws holding the Venturi to the
Fan and remove.
 Ensure the gasket is transferred to the new
venturi or positioned on the Fan before position
ing the replacement.
 Replacement is the reverse.
 Fire the Heater and check for gas leaks.
 After five minutes check the rate and combustion
is correct to the Datatable. (inside cover). Adjust
using the throttle on the Gas Valve if required.
(See Fig.14.3) .
IMPORTANT. The following components require the
draining of the primary. It is recommended that it is
re-filled with one litre Sentinel X500 Inhibitor/Anti-
freeze to provide winter protection. It is essential
that all the air is removed from the Heat Exchanger
before the Heater is fired. Running the Heater with
air still in it will damage the Heat Exchanger and
invalidate the warranty.
Pump
( See Fig.14.0 )
 Drain the primary waterside of the Heater.
 Diconnect the Pump mains lead from the six way
connector in the Electrical Chassis.
 Undo the two water connections of the pump and
remove.
 Transfer the mains lead to the new Pump.
 Replacement is the reverse.
Heat Exchanger
( See Fig.14.0 )
The removal of the Heat Exchanger will require
the draining of the Heater.
 Undo both the Demountable connections to the
Pool pipework. ( See Fig.14.5 )
 Undo the screws holding the panels around the
Demountable connections. ( See Fig.14.5 )
 Lower the pipework away from the Heat Ex-
changer.
 Remove the Front Top Panel and disconnect
the Flue Thermostat connections.
 Pull the Air Duct and Flue up and away from
the
Heater Flue Adapter.
 Disconnect the Heat Exchanger Combustion
Sensor by pressing the latch and pulling off.
 Remove the four screws holding the Rear Top
Panel.
 Lift the Rear Top Panel with the Flue
Adapter clear of the Heat Exchanger.
 Remove the Fan, Gas Valve and Ignition
Controller.
 The Heat Exchanger is now only retained by
the two side brackets and releasing the four
front screws will enable it to be pulled forward.
Before releasing ensure there is support
available.
 Replacement is the reverse.
IMPORTANT: If the unit is fitted outdoors it
is recommended that it is re-filled with a
suitable anti-freeze, the manufacturer
recommends Sentinal X500.
Secondary Heat Exchanger
( See Fig.14.0 )
 Drain the pool side sufficiently so that the
Heaters Pool Connections can be released.
 Remove the Case retaining Plates around the
Heater’s Pool Connections.
 Drain the primary system with the draincock
provided. Ensure an air vent is open to fully
release the water.
 Remove the Pool Sensor from the Secondary
Heat Exchanger.
 Remove the Expansion Vessel.
 Remove the single screw fixing the Secondary
Heat Exchanger to its mounting plate.
 Remove the single fixing screw holding the
Spacer below the Mounting Plate.
 Pull out forwards the Spacer and remove.
 Undo the primary Compression connections on
the Secondary Heat Exchanger and allow it to
drop off its connections and remove.
 Replacement is the reverse.
IMPORTANT: If the unit is fitted outdoors it
is recommended that it is filled with a
suitable anti-freeze, the manufacturer
recommends
Sentinal X500.