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Installation
Install the electric heater in the SICH unit as follows:
1) In all cases, the
established national regulations
should be followed.
2) Disconnect the power supply to the air conditioning
unit.
3) Install the magnetothermal and differential switches for
the heater in accordance with the indications appearing
in the table of General Characteristics and Wiring Dia-
grams.
4) Remove the access covers to the controls of the SCOC,
SCOH, SOC or SOH/SICH units.
5) Unpack the accessory, opening the top of the box. Make
sure the heater assembly has not been damaged during
transportation. Check the ceramic insulation and that the
heater wires are not in contact with any metal parts.
6) Remove the side covers of the SICH (070 to 180B) unit
and place the electric heater on the two vertical supports
of the coil, making the tab coincide with the drilled hole.
Check to make sure that the reset push button of the F9
thermal switch (F9 and F11 in 2-stage units) is accessible
and at the top.
For the SICH (240B and 300B) units, the electric heater
is fitted through the front of the air outlet. Remove the
central panel between the two fans and fasten the heater
to the side supports with the self-threading screws sup-
plied.
It is very important to manually check that the electric
heater is not in contact with the fan shaft.
See Assembly and general dimensions.
7) Mount the control support on the side of the machine, or
inside the electrical box, depending upon the SICH unit,
and fasten with the screws supplied.
8) Connect the power supply cables to connecting strip X1
(or automatic switch F21 in 2-stage). Connect the control
cable included between connector J1 of the A3 auxiliary
heater board (A4 in 2-stage units) and connector J10 of
the A1 control board of the air conditioning unit.
9) The installer should complete the electric circuit of the
heater by fitting an air flow control F14 (F14 and F15 in
2-stage) at the most convenient point of the ducts so
as to make sure the heater operates only when there is
sufficient air flow.
10) Connect power supply to the SCOC or SCOH/SICH unit
and to the heater.
11) To configure the accessory, press the test button of con-
trol board A1 for over 2 seconds, until the red led on the
board goes on. Configuration will be complete once said
led goes off.
12) Check operation of the heater by selecting the Emergency
Heat mode at the ambient thermostat of the air condition-
ing unit.
13) Replace the covers of the SCOC or SCOH/SICH units.
Note:
Should an incorrect response of the system take place,
see the Operation section of the SCOC or SCOH/SICH
Installation Instructions. There you will find the control func-
tions of the A1 electronic board on the heater, as well as its
configuration, incidents identification, etc.
Loose cables can cause overheating of the terminals or incorrect
operation of the unit. Fire hazards may also arise. Therefore, make
sure all cables are connected tightly.
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...