andrews MAXXflo EVO CWH 30/201, Руководство по установке и обслуживанию

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Maintenance 61 MAXXfl o EVO
Changing the following components will require a partial draining of the water
system. Once completed it is essential that all the air is removed from the heat ex-
changer before the heater is operated. To not do so may damage the heat exchanger
and invalidate the warranty.
6.2.12 HEAT EXCHANGER
• Turn off the water isolator located before the heat exchanger and drain off approximately 50 litres from the
tank (if pressure sensors are fi tted both sides of the heat exchanger can be isolated)
• Drain water using the drain point(s) to ensure the heat exchanger is as empty as possible.
• Disconnect all electrical connections to the fl ue, fl ow and return sensors.
• Disconnect the fl ue from the top of the heat exchanger by pushing the fl ue section upwards so that it
clears the heat exchanger
• Disconnect the electrical connections to the ionisation probe, ignition probe, fan and gas valve and place
wiring to one side.
• Remove the air intake from the venturi by squeezing the spring clip together, and disconnect off set tube
Gas valve
connectors
Fan connectors
o
Spring clip S Sp
Ionisation probe
Ignition probe
G G
cco
IIo
Push assembly
upwards
uup
Flue sensor
connector
Return sensor
connector
Flow sensor
connector
Isolation valve
Tank drain point Ta Ta
Drain cock