PHD4 Series K and WPH4 Series K: Installation Instruction
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
11
to duct flanges. Use suitable gaskets to ensure weather-tight and
airtight seal.
4. All units must have field-supplied filters or accessory filter rack
installed in the return-air side of the unit. Recommended sizes for
5. Size all ductwork for maximum required airflow (either heating or
cooling) for unit being installed. Avoid abrupt duct size increases or
decreases or performance may be affected.
6. Adequately insulate and weatherproof all ductwork located
outdoors. Insulate ducts passing through unconditioned space, and
use vapor barrier in accordance with latest issue of Sheet Metal and
Air Conditioning Contractors National Association (SMACNA)
and Air Conditioning Contractors of America (ACCA) minimum
installation standards for heating and air conditioning systems.
Secure all ducts to building structure.
7. Flash, weatherproof, and vibration-isolate all openings in building
structure in accordance with local codes and good building
practices.
A07925
Fig. 9 – Unit Leveling Tolerances
A07926
Fig. 10 – Slab Mounting Detail
Step 6 – Provide for Condensate Disposal
NOTE:
Ensure that condensate-water disposal methods comply with
local codes, restrictions, and practices.
The unit disposes of condensate through a 3/4 in. NPT female fitting that
exits on the compressor end of the unit. 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 mm)
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 field-supplied 2 -in. (51mm) trap at the condensate
connection to ensure proper drainage. Condensate trap is available as an
accessory or is field-supplied. Make sure that the outlet of the trap is at
least 1 in. (25 mm) lower than the unit drain-pan condensate connection
to prevent the pan from overflowing. Connect a drain tube using a
minimum of field-supplied 3/4-in. PVC or field-supplied 3/4-in. copper
pipe at outlet end of the 2-in. (51 mm) trap. (See
) Do not
undersize the tube. Pitch the drain tube downward at a slope of at least 1
in. (25 mm) every 10 ft (3 m) of horizontal run. Be sure to check the
drain trough for leaks. Prime the trap at the beginning of the cooling
season start-up.
A09052
Fig. 11 – Condensate Trap
Step 7 – Install Electrical Connections
A
B
C
MAXIMUM ALLOWABLE
DIFFERENCE in. (mm)
A-C
1/4
1/4
1/4
(6.35)
(6.35)
(6.35)
A-B
B-C
OPTIONAL
RETURN
AIR
OPENING
OPTIONAL
SUPPLY
AIR
OPENING
EVAP. COIL
COND. COIL
ß
(50.8mm)
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 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.
5. Route field power supply(s) away from areas that could be
damaged by lawn and garden equipment or other accidental
damage.
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. 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,NFPA 70
National Fire Protection Association (latest edition) (in Canada,
Canadian Electrical Code CSA C22.1) and local electrical codes.
TRAP
OUTLET
1-in. (25 mm) min.
2-in. (51 mm) min.
