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Table.7
ELECTRIC HEATER OPTION
42TW 3 Rows Models
42TW3-03
42TW3-05
42TW3-06
42TW3-07
42TW3-09
42TW3-11
42TW3-12
42TW3-16
TEST AND INSULATE
When all joints are complete, perform hydrostatic
test for leaks. Vent all coils at this time. Check
interior unit piping for signs of leakage from
shipping damage or mishandling. If leaks are
found, notify a Carrier representative before
initiating any repairs. Release trapped air from
system (refer to Make Final Preparations section).
MAKE ELECTRICAL CONNECTIONS
Refer to unit nameplate for required supply
voltage, fan and heater amperage and required
circuit ampacity. Refer to unit wire diagram for unit
and field wiring; see fig.6 . Make sure all electrical
connections are in accordance with unit wiring
diagram and all applicable codes. The fan
motor(s) should never be controlled by any wiring
or device other than the factory-supplied control
board and remote control.
All field wiring must be in accordance with
governing codes and ordinances. Any modification
of unit wiring without factory authorization will
invalidate all factory warranties and nullify any
agency listings.
- Select proper wall location to fix display pad
- Connect communication cable end to its
location in the PCB as shown in the wiring
diagram.
IMPORTANT
Wiring diagrams shown depict typical control
functions. Refer to unit wiring label for specific
functions.
MAKE DUCT CONNECTIONS
Install all ductwork to and from unit in
accordance with all applicable codes. Duct
construction must allow unit to operate within
duct external static pressure limits as shown
on job submittals. Units designed to operate
with ductwork may be damaged if operated
without intended ductwork attached.
Units provided with outside air should have
some method of low-temperature protection
to prevent freeze-up. Insulate ductwork as
required.
Use
flexible
(2 Pipe System)
42TW 4 Rows Models
42TW4-03
42TW4-04
42TW4-05
42TW4-06
42TW4-08
42TW4-10
42TW4-11
42TW4-14
connections
to
Heater option, watts
minimize duct-to-unit alignment problems and
noise transmission where specified.
Set unit markings for minimum clearance to
combustible materials and first 3 ft of
ductwork. Install ductwork, accessory grilles
and plenums so that they do not restrict
access to filter.
Cut openings for supply-air and return-air
grilles. Be careful not to cut wires, piping or
structural supports.
CAUTION
Prevent dust and debris from settling in
unit. If wall finish or color is to be spray
applied, cover all openings to prevent
spray from entering unit. Unit efficiency
will be reduced.
MAKE FINAL PREPARATIONS
1. Turn off power to the unit (open unit
electrical disconnect).
3. Clean dirt, dust, and other construction
debris from unit interior. Be sure to check fan
wheel and housing.
4. Rotate fan wheel by hand to be sure it is
free and does not rub housing. Check that
wing nuts securing fan assembly to fan deck
are tight.
5. Ensure all panels and filters are installed
before checking fan operation. Turn on power
to the unit.
IMPORTANT
Do not start-up or operate unit without
filter. Be sure filter and unit interior are
clean.
8. Be sure drain line is properly and securely
positioned and that the line is clear. Pour
water into drain to check operation.
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2000
2000
2000
2500
2500
4000
4000
4000
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