Keston Thermomatic RSM20/FB, Installation & Servicing Instructions Manual, Page: 21 / 46

Page 21
6.5.2 Disconnect leads at the in line connectors and
remove the earth wire From the top of the appliance.
6.5.3 Remove three screws from the fan mountings,
remove fan,
6.5.4 Tighten mounting screws evenly.
6.6
AIR PRESSURE SWITCH, ITEM 16
6.6.1 Refer to Sections 6.1. 6.2.1 and 6.4 above.
6.6.2 Disconnect plastic lubes from switch.
6.6.3 Disconnect three wires from switch.
6.6.4 Remove two screws from supporting bracket
and remove switch.
6.6.5 Plastic tubes are identified red to red.
6.7
DOMESTIC HOT WATER EXPANSION
VESSEL ITEM 46
6.7.1 Refer to Sections 6.1. 6.2.1. 6.2.2. 6.2.4 (left
hand side panel) 6.3 (drain DHW circuit) and 6.4.
6.7.2 Unscrew the vessel.
6.8
AUTOMATIC AIR VENT. ITEM 47
6.8.1 Refer to Sections 6.1. 6.2.1. 6.2.2. 6.4. (drain-
ing not necessary.
6.8.2 Unscrew vent from hexagon nut.
6.9 CENTRAL HEATING EXPANSION VESSEL.
ITEM 49.
6.9.1 Refer to Sections 6.1. 6.2.1. 6.3 (central heat-
ing) and 6.4.
6.9.2 Release union on the top of the vessel.
6.9.3 Remove vessel.
6 10 BIMETALLIC PRIORITY THERMOSTAT ITEM
43.
6.10.1 Refer to Sections 6.1, 6.2.1, 6.2.2, 6.2.4 (left
hand side panel) and 6.4
6.10.2 Disconnect the leads to the thermostat.
6.10.3 Unscrew the two screws & remove the
thermostat.
Fig. 6-2