29
For mounting on
A
B
C
SICH-070 and 076B
1 103
480
48
SICH-090 and 120B
1 339
550
48
SICH-150B
1 740
550
48
SICH-180B
1 930
470
80
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Internal electric heaters for SICH-070 to
SICH-300B
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 system. They should be fitted to the internal supports
of the indoor unit.
Technical specifications
These internal electric heaters include the following com-
ponents:
- 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
Summary of Contents for SCOH-070K
Page 7: ...SCOH 090 and 120K General dimensions mm...
Page 8: ...SCOH 150K General dimensions mm...
Page 9: ...SCOH 180K General dimensions mm...
Page 10: ...10 SCOH 240 and 300K General dimensions mm...
Page 11: ...11 SICH 070 and 076B SICH 090 and 120B SICH 150B General dimensions mm...
Page 12: ...12 SICH 180B SICH 240B and 300B General dimensions mm...
Page 14: ...14 Variant chart...
Page 23: ...23 Wiring diagram SCOH 070K 076K 090K and 120K 400 3 50...
Page 24: ...24 Wiring diagram SCOH 120K 180K 240K and 300K 400 3 50...
Page 25: ...25 Wiring diagram SCOH 150K 180K 240K and 300K 400 3 50...
Page 26: ...26 Configuration of switches failures lock outs and incidents...
Page 30: ...30 Assembly and general dimensions mm SICH 240B to 300B...
Page 33: ...33 Wiring diagram Heater 10 15kW 400 3 50 SICH 070 to 180B...
Page 34: ...34 Wiring diagram Heater 20 30kW 400 3 50 SICH 090 to 300B...
Page 37: ...37 Location of the heater SICH 070 and 076B...
Page 38: ...38 Location of the heater SICH 090 to 300B...
Page 39: ...39 Wiring diagram Heater 10 15kW 400 3 50 SICH 070 and 076B...
Page 40: ...40 Wiring diagram Heater 20 30kW 400 3 50 SICH 090 to 300B...
Page 48: ...www johnsoncontrols com...