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For mounting on
A
B
C
SICH-070B and 076B
1 103
480
48
SICH-090B and 120B
1 339
550
48
SICH-150B
1 740
550
48
SICH-180B
1 930
470
80
THERMAL PROTECTOR
(MANUAL) F9
B
A
C
POSITION OF THERMAL
PROTECTOR F9
INTERNAL
ELEC TRIC
HEATER
FAN
AIR TO
INTERIOR
COIL
FILTER
INDOOR
AIR
Internal electric heaters for SICH-076B
to 180B
These internal electric heaters are designed to provide backup
or complementary heat for the SICH units. On and off cycles
are governed by the air conditioning equipment control sys-
tem. They should be fitted to the internal supports of the in-
door unit.
Technical specifications
These internal electric heaters include the following compo-
nents:
- Galvanised sheet casing and supports.
- Exposed nickel-chrome wire electric resistances mounted
on steatite supports.
- Power supply contactor with a 400 V coil.
- Two thermal protectors located at the top of the heater. The
first, with automatic reset, disconnects the heater when a
temperature of 77°C is reached. The second, accessible
internally and with manual reset, disconnects the heater
when reaching a temperature of 138°C. Two-stage heaters
contain four thermal protectors; two for each stage.
- Interlock with the heat relay of the indoor fan. The control
system of the unit does not let the heater operate if the
indoor fan heat relay has failed.
- Plug-in connector for interconnecting the control panel of
the air conditioning unit and the heater.
- Self-threading screws for fastening this accessory.
Assembly and general dimensions mm