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SCXG-SVX01B-EN 43
pre-startup
requirements
Installation
Electric Heat Installation
The electric heat option consists of a
single stage heater and is used in
IntelliPak units or units with a field-
installed thermostat. The electric heater
ships separate for field installation and
wiring. Available heater kW per unit size
is listed in Table I-PR-2. Electric heat can
be installed on units with a vertical
discharge. However, it cannot be installed
on units with plenums. See Figure I-PR-12
and Table I-PR-3 for electric heat dimen-
sional data.
Table I-PR-2. Available Electric Heat kW
Unit Size Heater kW
20 Tons 16
25 Tons 20
30 Tons 24
32 Tons 26
35 Tons 28
Installation Procedure
1. Remove the fan discharge shipping
covers, if they have not already been
removed.
2. Install the open-cell gasket around the
discharge opening on the heater.
3. Position the electric heater so that the
unit fan discharge openings line up with
the electric heater openings. For a
Figure I-PR-12. Electric heater dimensions.
Table I-PR-3. Electric Heat Dimensions - English - (inches)
Unit Size B1 B2 Z
20 Tons 10
3
/
4
15
5
/
8
27
3
/
4
25 Tons 12
1
/
4
15
5
/
8
26
3
/
4
30, 32, 35 Tons 14
3
/
4
15
5
/
8
23
3
/
4
Figure I-PR-12. Vertical discharge electric heat
installation.
vertical discharge unit, position the
electric heater as shown in Figure I-PR-
12.
4. Use the hole pattern in the electric heat
as a template for marking and drilling
3
/
16
” diameter holes in the unit.
5. Bolt the electric heaters to the unit
using
1
/
4
” sheetmetal screws.
Note: It is very important that electric heaters
are selected based on unit voltage and
tonnage because discharge opening sizes vary
by unit tonnage.
Electric Heat Coil Wiring Procedure
NOTICE
Use Copper Conductors Only!
Unit terminals are not designed to
accept other type conductors. Failure to
use copper conductors may result in
equipment damage.
ƽƽ
ƽƽ
ƽWARNING
Hazardous Voltage w/Capacitors!
Disconnect all electric power, including
remote disconnects before servicing.
Follow proper lockout/tagout proce-
dures to ensure the power cannot be
inadvertently energized. For variable
frequency drives or other energy storing
components provided by Trane or others,
refer to the appropriate manufacturer’s
literature for allowable waiting periods
for discharge of capacitors. Verify with an
appropriate voltmeter that all capacitors
have discharged. Failure to disconnect
power and discharge capacitors before
servicing could result in death or serious
injury.
Note: For additional information regard-
ing the safe discharge of capacitors, see
PROD-SVB06A-EN or PROD-SVB06A-FR.
1. Before wiring the electric heater,
remove the unit wiring diagram from
the unit control panel and refer to the
connection points.