Ravenheat RSF 84E, Installation And Servicing Instructions

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7.19
7.19.1
7.19.2
7.19.3
7.19.4
7.19.5
7.20
7.20.1
7.20.2
7.20.3
7.20.4
7.21
7.21 .1
7.21.2
7.21.3
7.21.4
7.2.15
7.22
7.22.1
TO REMOVE/REPLACE
THE HEATING
CONTROL AND DOMESTIC HOT WATER
CONTROL
Remove the front panel from the outer cas-
ing (sect. 7.3) and lower the instrument
panel (sect. 7.16.2 & 3) and remove the
control box cover (7.31.2/3).
Pull off the thermostat knob (Fig. 78).
Remove the lock nut and remove the con-
trol board (PCB)
Detach the wires by unclipping the connec-
tor from the control board (Fig. 79).
Unscrew the lock nut which fastens the po-
tentiometer to the instrument panel (Fig. 78).
Replace in reverse order.
TO REMOVE/REPLACE THE MAIN
SWITCH (Fig. 82).
Remove the front panel from the outer cas-
ing (sect. 7.3), lower the instrument panel
(sect. 7.16.2 & 3), remove the control box
cover (7.31.2/3) and remove the control
knob.
Detach the wires that connect to the switch
- make sure that these wires are later
reconnected to the same poles (Fig. 94).
Pull the switch out from the instrument
panel by pressing the clamp springs.
Replace in reverse order.
TO REMOVE/REPLACE THE WATER
PRESSURE GAUGE (Fig. 83).
Remove the front panel from the outer cas-
ing (sect. 7.3) and lower the instrument
panel (sect. 7.16.2 & 3).
Remove the lower grating (sect. 54.2).
Close the heating system on/off valves and
drain the water from the drain point on the
heating system (Fig. 93).
Unscrew the fitting that secures the pres-
sure gauge probe.
Remove the gauge from the instrument
panel by pressing its fastening springs.
Replace in reverse order.
TO REMOVE/REPLACE THE OVERHEAT
THERMOSTAT
Remove the front panel from the outer cas-
ing (sect. 7.3) and lower the instrument
panel (sect. 7.1.6.2 & 3) and remove the
control box cover (sect. 7.31.2/3).
7.22.2 Remove lower grill and right side of the
casing (sect. 5.4.2 & 5).
7.22.3 Remove the three wires that connect to the
overheat thermostat making sure that
these wires will subsequently be recon-
nected to the same poles (Fig. 94).
7.22.4
Unscrew the plastic cover and locknut that
fastens the overheat thermostat and
remove it.
7.22.5 Remove the split pin and pull the thermo-
stat sensor from its pocket complete with
case sealing grommet.
7.22.6
Remove case sealing grommet from the
old thermostat and fit to new one.
7.22.7
7.23,
Replace in reverse order.
TO REMOVE/REPLACE THE ELECTRIC
CONTROL BOARD (PCB)
7.23.1 Remove the front panel from the outer cas-
ing (sect. 7.3) and lower the instrument
panel (sect. 1.16.2 & 3).
7.23.2 Unscrew the 2 screws holding the control
box cover and remove.
Disconnect mains cables and any other
connections (room thermostat and frost
thermostat if fitted).
7.23.3
7.23.4
Detach the connectors from the board.
Detach the PCB board from its base by
unscrewing the six screws.
7.23.5 Replace in reverse order (ensure all electri-
cal connections are made correctly).
7.23.6 Having replaced PCB recommission boiler
on heating mode (sect. 6.15).
7.24 TO REMOVE/REPLACE THE DIFFEREN-
TIAL PRESSURE SWITCH (Fig. 87).
7.24.1
Remove the front panel from the outer cas-
ing and the combustion chamber front
cover (sect. 7.3 & 4).
7.24.2 Detach the wires that connect to the pres-
sure switch, make sure that these wires are
later reconnected to the same poles
(Fig. 94).
7.24.3 Unscrew the two screws that fasten the
pressure switch to the back of combustion
chamber.
7.24.4 Remove the two silicone tubes.
7.24.5 Ensure tubes are connected correctly (Fig.
87) avoiding kinks,
39