Heat Exchanger; Replacing - Buderus Logamax plus GB142-24 Servicing Instructions

8.1.34 Heat exchanger; replacing

 Switch off the power supply of the heating system on the circuit
breaker.
 Close the maintenance shut-off valves and drain the Logamax
plus GB142, see 116, fig. 83.
 Set the main switch on the BC10 to "0" (Off).
 Remove the casing.
 Close the gas shut-off valve(see fig. 85, pos. 1).
 Remove the cable plug from the gas control valve
(see fig. 86, pos. 1).
 Remove both cable plugs from the fan unit (see fig. 87, pos. 1).
Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
fig. 85 Gas shut-off valve closed (1), gas shut-off valve
open (2)
fig. 86 Replacing the gas control valve
(e.g. HONEYWELL gas control valve)
1
fig. 87 Disconnecting the cable plug from the fan unit
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