Ravenheat HE 25 S COMPACT, Instructions For Use Installation And Servicing

Page: 50 / 67

8.17 TO REMOVE/REPLACE SAFETY RELIEF
VALVE (Fig. 46)
Remove the front and bottom panels
(fig. 39-40).
Close the on/off valves for C.H. circuit and
drain the water from at drain point fig.36.
Unscrew the safety relief valve screw and
pull up.
Replace in reverse order and using a new
gasket.
8.18 TO REMOVE/REPLACE D.H.W. SENSOR
(Fig. 46)
Remove the front and bottom panels
(fig. 39-40).
Close the on/off valve for the DHW circuit
and drain the hot water from the lowest hot
water tap.
Detach the wire connector and unscrew the
sensor.
Replace in reverse order.
8.19 TO REMOVE/REPLACE C.H. FLOW AND
RETURN SENSORS (Fig. 48)
Remove the front panel (fig. 39).
Detach the wire connector and remove
the retaining clip sensor from the pipe.
NOTE: When reconnecting ensure the
correct wires go to the relevant sensor
(the polarity on each one is unimportant).
8.20 TO REMOVE/REPLACE FLUE SENSOR
(Fig. 3 item 23)
Remove the front panel (fig. 39).
Detach the wire connector and
rotate the sensor.
Replace in reverse order.
Fig.48
8.21 TO CLEAN AND REMOVE/REPLACE
CONDENSING TRAP (Fig. 49)
Remove the front panel (fig. 39), bottom
and left side panels (fig. 40).
Remove the securing clip and pull
out the plastic pipe that connects the
condensing trap at the heat exchanger.
Unscrew the nut that fastens the
condensing trap to the depression
chamber and remove it.
If the side panel can not be removed then
remove the gas valve (see sec 8.9) and
continue with the above instructions.
Replace in reverse order.
50
Fig.49