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Installation
Install the electric heater in the SICH unit as follows:
In all cases, the established national regulations
1)
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 and 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 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. 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 con-
trol cable included between connector J1 of the A3 aux-
iliary 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 SICH or SCOH/SICH unit
and to the heater.
11) o 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 Emer-
gency Heat mode at the ambient thermostat of the air
conditioning 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 In-
stallation 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 op-
eration of the unit. Fire hazards may also arise. Therefore, make sure
all cables are connected tightly.
33
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