Technical data

21
GEMINI HSC
21.0 immersion heater
replacement
In order to replace the electric immersion heater it is necessary to drain the
primary side only, see section 20.1.
1. Electrically isolate the calorifier.
2. Remove immersion heater cover panel models 200-i, 300-i and 500-i or control panel
models 60-i, 100-i and 150-i.
3. Disconnect electrical connections from immersion heater (note: some models have additional manual
reset high limit stat - not shown).
4. Remove fixing bolts from circumference of immersion heater carrier plate and retain bolts for re-use.
5. Remove immersion heater by withdrawing to the front and then to the side.
6. Remove and discard gasket.
7. Insert new immersion heater complete with new gasket.
8. Secure immersion heater by tightening bolts evenly using opposite-opposite sequence.
9. Refill and vent primary side - see 16.10 and ensure water tightness.
10. Reconnect electrical connections and refit cover/control panel.
Fig 13.