Configuring Units For Downflow (Vertical) Discharge; Connect Condensate Drain; Install Electrical Connections; High- -Voltage Connections - Carrier PA3Z-B Installation Instructions Manual

CONFIGURING UNITS FOR DOWNFLOW (VERTICAL)
DISCHARGE
Units are dedicated side supply products. They are not convertible
to vertical air supply. A field- -supplied plenum must be used to
convert to vertical air discharge.
Step 6 — Connect Condensate Drain
NOTE: When installing condensate drain connection be sure to
comply with local codes and restrictions.
Unit removes condensate through a 1- -3/64- -in. (26.6 mm) ID hole
(using 3/4- -in. (19 mm) ID piping or tubing) which is located at the
end of the unit. See Fig. 4 and Fig. 5 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 condensate trap at end of
condensate connection to ensure proper drainage. Make sure that
the outlet of the trap is at least 1 in. (25.4 mm) lower than the drain
pan condensate connection to prevent the pan from overflowing
(See Fig. 7 and Fig. 8). 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 2- -in. (50.8 mm) trap using a 3/4- -in. (19 mm) ID
tubing or pipe. (See Fig. 7 and 8.) Make sure that the outlet of the
trap is at least 1 in. (25.4 mm) 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
3/4- -in. (19.1 mm) PVC, 3/4- -in. (19.1 mm) CPVC, or 3/4- -in.
(19.1 mm) copper pipe (all field supplied). Do not undersize the
tube. Pitch the drain tube downward at a slope of at least 1 in. (25.4
mm) for every 10 ft (3 m) of horizontal run. Be sure to check the
drain tube for leaks. Prime trap at the beginning of the cooling
season start- -up. Allowable glues for condensate trap connection
are: Standard ABS, CPVC, or PVC cement.
1" (25 mm) MIN .
Fig. 7 - - Condensate Trap
1" (25 mm) MIN.
Fig. 8 - - PVC Condensate Trap
TRAP
OUTLET
2" (51 mm) MIN.
A08001
TRAP
OUTLET
2" (51 mm) MIN.
A08002
Step 7 — Install Electrical Connections
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
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
screw in the control compartment, or conduit approved for
electrical ground when installed in accordance with NEC,
ANSI/NFPA 70 American National Standards Institute/
National Fire Protection Association (latest edition) (in
Canada, Canadian Electrical Code CSA C22.1) and local
electrical codes.
CAUTION
!
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in damage to the
unit being installed.
1. Make all electrical connections in accordance with NEC
ANSI/NFPA 70 (latest edition) and local electrical codes
governing such wiring. In Canada, all electrical
connections must be in accordance with CSA standard
C22.1 Canadian Electrical Code Part 1 and applicable
local codes. 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
operating voltage range indicated on unit rating plate. On
3- -phase units, ensure phases are balanced within 2
percent. Consult local power company for correction of
improper voltage and/or phase imbalance.
4. Do not damage internal components when drilling
through any panel to mount electrical hardware, conduit,
etc.

HIGH- -VOLTAGE CONNECTIONS

The unit must have a separate electrical service with a
field- -supplied, waterproof disconnect switch mounted at, or within
sight from the unit. Refer to the unit rating plate, NEC and local
codes for maximum fuse/circuit breaker size and minimum circuit
amps (ampacity) for wire sizing.
The field- -supplied disconnect may be mounted on the unit over
the high- -voltage inlet hole when the standard power and
low- -voltage entry points are used. See Fig. 9 and 10 for acceptable
location.
Operation of unit on improper line voltage constitutes abuse and
may cause unit damage that could affect warranty.

ROUTING POWER LEADS INTO UNIT

Use only copper wire between disconnect and unit. The
high- -voltage leads should be in a conduit until they enter the unit;
conduit termination at the unit must be watertight. Run the
high- -voltage leads through the hole on the control box side of the
unit (See Fig. 9). When the leads are inside the unit, run leads to
the control box (See Fig. 10). Connect leads to the black and
yellow wires.
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