Step 6 - Provide For Condensate Disposal; Step 7 - Install Electrical Connections; High-Voltage Connections; Routing Power Leads Into Unit - Carrier 50HS024-060 Installation, Start-Up And Service Instructions Manual

Step 6 — Provide for Condensate Disposal
NOTE: Be sure that condensate water disposal methods com-
ply with local codes, restrictions, and practices.
Units dispose of condensate through a
which exits through the compressor access panel. See
Fig. 2 and 3 for location of condensate connection.
Condensate water can be drained directly onto the roof in
rooftop installations (where permitted) or onto a gravel apron
in ground-level installations. Install a field-supplied conden-
sate trap at end of condensate connection to ensure proper
drainage. See Fig. 19. Make sure that the outlet of the trap
is at least 25 mm (1 in.) lower than the drain-pan condensate
connection to prevent the pan from overflowing. Prime the
trap with water. When using a gravel apron, make sure it
slopes away from the unit.
If the installation requires draining the condensate water
away from the unit, install a 51 mm (2-in.) trap using a
3 ⁄ -in. FPT connection. See Fig. 19. Make sure that the outlet
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of the trap is at least 25 mm (1 in.) lower than the unit
drain-pan condensate connection to prevent the pan from
overflowing.
Prime the trap with water. Connect a drain tube using a
minimum of 19 mm ( 3 ⁄ -in.) PVC, 19 mm (
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19 mm ( 3 ⁄ -in.) copper pipe (all field supplied). Do not un-
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dersize the tube. Pitch the drain tube downward at a slope of
at least 25 mm (1 in.) for every 3 m (10 ft) of horizontal run.
Be sure to check the drain tube for leaks.
Step 7 — Install Electrical Connections
The unit cabinet must have an uninterrupted, unbroken
electrical ground to minimize the possibility of personal
injury if an electrical fault should occur. This ground
may consist of an electrical wire connected to the unit
ground lug in the control compartment, or conduit ap-
proved for electrical ground when installed in accor-
dance with local electrical codes. Failure to adhere to
this warning could result in personal injury or death.
Failure to follow these precautions could result in dam-
age to the unit being installed:
1. Make all electrical connections in accordance with
local electrical codes governing such wiring. Refer
to unit wiring diagram.
2. Use only copper conductor for connections between
field-supplied electrical disconnect switch and unit.
DO NOT USE ALUMINUM WIRE.
3. Be sure that high-voltage power to unit is within op-
erating voltage range indicated on unit rating plate.
Ensure that phases are balanced within 2%. Consult
local power company for correction of improper volt-
age and/or phase imbalance.
4. Insulate low-voltage wires for highest voltage con-
tained within conduit when low-voltage control wires
are run in same conduit as high-voltage wires.
5. Do not damage internal components when drilling
through any panel to mount electrical hardware, con-
duit, etc.
HIGH-VOLTAGE CONNECTIONS — The unit must have
a separate electrical service with a field-supplied, water-
proof disconnect switch mounted at, or within sight from,
the unit. Refer to the unit rating plate for maximum fuse/
circuit breaker size and minimum circuit amps (ampacity)
for wire sizing. See Table 3 for electrical data.
3 ⁄ -in. NPT fitting
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over the high-voltage inlet hole. See Fig. 2 and 3.
cessory for electrical service connections. For electric heater
information, see Table 4.
ROUTING POWER LEADS INTO UNIT — Use only cop-
per wire between disconnect and unit. The high-voltage leads
3 ⁄ -in.) CPVC, or
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should be in a conduit until they enter the duct panel; con-
duit termination at the duct panel must be watertight. Run
the high-voltage leads through the power entry knockout on
the duct panel (see Fig. 20 for location and size). When the
leads are inside the unit, run leads up the high-voltage race-
way to the control box (Fig. 21). Connect the leads to the
terminal block (see Fig. 22).
CONNECTING GROUND LEAD TO GROUND LUG —
Refer to Fig. 24. Connect the ground lead to the chassis us-
ing the ground lug in the wiring box.
ROUTING CONTROL POWER WIRES (24 v) — Form a
drip-loop with the thermostat leads before routing them into
the unit. Route the thermostat leads through grommeted, low
voltage hole provided in unit (see Fig. 20) into unit control
power splice box. Connect thermostat leads to unit control
power leads as shown in Fig. 23.
supplies 24-v power for the complete system. A manual-
reset circuit breaker is provided in the 24-v circuit, and the
unit transformer is factory-wired for 400 v.
NOTE: Power entry knockout measurements are for sizes 024-048.
For size 060 power entry knockout measurements see Fig. 3.
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Fig. 19 — Drain Tubing Connection and
Condensate Trap
The field-supplied disconnect may be mounted on the unit
Consult the Installation Instructions provided with the ac-
Operation of unit on improper line voltage constitutes
abuse and may cause unit damage that could affect
warranty.
The unit transformer is of the safety-isolation type and
POWER ENTRY
51 mm (2 DIA.
29 mm (1 1/8") DIA.
35 mm (1 3/8 DIA.
51 mm (2 DIA.
22 mm (7/8 DIA.
LOW VOLTAGE
ENTRY
Fig. 20 — Duct Panel Knockouts