9REPAIR
T
HERMO
90 / 90 S
9-2
9.2 Disassembly and Assembly
9.2.1 Electrical Connections (Fig. 9-1)
9.2.1.1 Disconnecting Electrical Connections
(Connection X1)
NOTE:
All electrical connections are joined in the connector.
Prior to removal of a component, the relevant electrical
connections first have to be disconnected.
On the Thermo 90 S heater with flanged combustion air
fan, connector X1 on heater and connection X12 on
control unit must be disconnected and reconnected after
making electrical connections.
1. Remove top cover from heater.
2. Using removal tool (hook end) withdraw lock wedge
from connector.
3. Using removal tool (screw driver end) press down
relevant locking tab and while keeping tab depressed
withdraw cables from connector.
9.2.1.2 Making Electrical Connections
1. Slide cable into relevant contact pocket until locked.
2. Using removal tool (screw driver end) insert lock
wedge in connector and press in until locked.
3. Fit top cover.
NOTE:
One of the newer models Thermo 90 shown. Older
models have the cable of the temperature limiter located
on the side.
Heater Thermo 90 S may have the control unit located
on the combustion air fan.
Fig. 9-1 Electrical Connections
