Ravenheat CSI 85 User Manual download pdf (Page 38)

Fig. 58

7.25 TO REMOVE/REPLACE THE CENTRAL

HEATING EXPANSION VESSEL (fig. 58).

In the unlikely event of failure of the central

heating expansion vessel it is recommended

a suitable expansion vessel be fitted

external to the boiler. It should be positioned

on the return pipe and as close to the boiler as

possible. However, if it is necessary to replace

the central heating expansion vessel the

boiler must be removed from the wall as

follows.

7.25.1 Remove the casing (sect. 7.3) and lower the

instrument panel and remove the control box

cover.

7.25.2 Close the on/off valve on the domestic cold

water, central heating and gas supply.

7.25.3 Drain domestic water from the lowest hot

water tap and drain point on DHW inlet cock

(Fig. 45).

7.25.4 Drain the boiler.

7.25.5 Disconnect all pipework connected to boiler.

7.25.6 Disconnect mains cables and any other

connections (room thermostat, programming

clock).

7.25.7 Remove the duct.

7.25.8 Remove the 2 top coach bolts then remove

the boiler by lifting from the wall bracket.

7.25.9 Unscrew the nut that connects the expansion

vessel and remove it.

7.25.10 Remove the screw and the bracket supporting

expansion vassel.

7.25.11 Replce in reverse order.

7.24.1 TO REMOVE/REPLACE DHW

DIVERTER VALVE (fig. 57).

7.24.1.1 Remove front and bottom of the casing

(sect 7.3).

7.24.2 Close the on/off valve for the DHW circuit

and drain the boiler.

7.24.3 Remove the flow detector.

7.24.4 Unscrew the DHW diverter valve.

7.24.5 Replace in reverse order.

NOTE: Always use new o-rings.

7.26 TO REMOVE / REPLACE D.H.W. HEAT

EXCHANGER.

7.26.1 Remove the front panel from the outer

casing and lower the instrument panel

(sect. 7.3).

7.26.2 Close the on/off valves for the heating circuit

and the hot water circuit. Drain the boiler (Fig.

45) and drain hot water from the lowest hot

water tap and drain point on DHW inlet cock.

7.26.4 Unscrew the two screws that connect the DHW

heat exchanger and pull it out from boiler.

7.26.5 Replace in reverse order always use new

seals.

7.26.6 Fill the boilers as described in (sect. 6.4 and 6.5)

and check for leaks.

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Instructions for Use 1
Installation and Servicing 1
D.H.W. heat exchanger 4
SECTION 1 INTRODUCTION 6
SECTION 2 6
2H - П2H3+ 8
TABLE 1/A 9
3+ - П2H3+ 9
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SHORT LIST OF SPARE PARTS 47
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COD 0017LIB060005/3 - 02/2010 50
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Ravenheat CSI 85 User Manual Page 38

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