Carrier CNPHP User manual

Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance, or
use can cause explosion, fire, electrical shock or other conditions which
may cause death, personal injury or property damage. Consult a
qualified installer, service agency, or your distributor or branch for
information or assistance. The qualified installer or agency must use
factory-authorized kits or accessories when modifying this product.
Refer to the individual instructions packaged with the kits or accessories
when installing.
Follow all safety codes. Wear safety glasses, protective clothing and
work gloves. Use quenching cloths for brazing operations. Have fire
extinguisher available. Read these instructions thoroughly and follow all
warnings or cautions attached to the unit. Consult local building codes
and the current editions of the National Electrical Codes (NEC) NFPA
70.
In Canada, refer to the current editions of the Canadian Electrical Code
CSA C22.1.
Recognize safety information. This is the safety-alert symbol . When
you see this symbol on the unit and in instructions or manuals, be alert to
the potential for personal injury.
Understand the signal words DANGER, WARNING and CAUTION.
These words are used with the safety-alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury or
death. WARNING signifies hazards which could result in personal
injury or death. CAUTION is used to identify unsafe practices, which
may result in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in enhanced
installation, reliability, or operation.
NOTE: Nitrogen can leak out through the needle pierce hole in the
plugs. This does not indicate a leaking coil nor warrant return of the coil.
INTRODUCTION
The CNPHP is a horizontal, multi-use furnace coil (Fig. 1). With the use
of field-supplied transition duct, these furnace coils can also be applied
to other similar horizontal furnaces on the market. The coil is available
in sizes 024 through 060. All models are equipped with a
factory-installed TXV and are used with Puron® (R-410A) refrigerant
systems.
CNPHP
Cased N Coil, Horizontal
Heating – Cooling
WARNING
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury or death.
Before installing, modifying or servicing system, always turn off main
power to system. There may be more than one disconnect switch. Lock
out and tag switch with a suitable warning label.
CAUTION
!
PERSONAL INJURY HAZARD
Failure to follow this caution may result in personal injury.
This coil contains Nitrogen precharge of 15 PSIG. Release of this
pressure through the center of the rubber plugs is required before
removing the plugs.
CAUTION
!
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and wear
appropriate protective clothing and gloves when handling parts.
CAUTION
!
UNIT OR PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
Take precautions to ensure Aluminum tubes do not come in direct
contact or allow for condensate run off with a dissimilar metal.
Dissimilar metals can cause galvanic corrosion and possible premature
failure.
CAUTION
!
ENVIRONMENTAL HAZARD
Failure to follow this caution may result in environmental damage.
Federal regulations require that you do not vent refrigerant to the
atmosphere. Recover during system repair or final unit disposal.

CNPHP: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
2
INSTALLATION
A06031
Fig. 1 – Furnace Coil
CNPHP furnace coils are NOT designed to be installed with furnaces
that measure wider than the coil itself.
Before installation, there are several other performance requirements
that must be considered because poor installation can negatively alter
performance. The following section will briefly discuss those factors.
Airflow
Airflow amount and distribution are vital to adequate system
performance. Problems that can be experienced with incorrect airflow
include:
• low system performance
• restricted TXV
• frosted coil
• poor humidity control
• water blow-off
NOTE: In addition, heat pump applications require airflow in a
particular direction for best performance. See decal on front of coil for
correct direction.
When attaching the coil and building the plenum, pay special attention to
the effect these details will have on airflow. After system start-up, check
the cfm to insure that it is correct. (Generally, the cfm should be 350 to
400 cfm/ton during normal cooling operation.)
TXV
A thermal expansion valve is utilized in this coil design to optimize
performance and comfort throughout the entire operating range of the
system. Special attention needs to be taken to the TXV when installing
the coil
• Do not overheat valve. Temperatures that exceed 212°F (100°C) can
harm valve performance. Use a wet cloth or heat sink when brazing.
• Place liquid filter dryer near ID unit to reduce the risk of debris
clogging the valve.
• Make sure TXV bulb is securely fastened and wrapped in the
indentation on vapor line tube.
CNPHP Models:
These coils have a factory-installed hard-shutoff TXV designed only for
use with R-410A refrigerant. Use only with outdoor units designed for
R-410A.
NOTE: All TXV’S have preset superheat settings and are not
field-adjustable.
Cabinet Sweating
If the unit is installed in a garage, attic, or other unconditioned space,
special attention may need to be given to the potential of cabinet
sweating.
Condensate Management
With proper installation, these coils will manage the condensate without
blow-off into the duct work. The 43, 60, and 61 size coils require the
addition of a pan extension for both horizontal left and horizontal right
position, which is supplied with the coils. See detailed instructions for
more info. Also, refer to Connect Condensate Drain Line section of this
instruction.
HORIZONTAL-RIGHT AND HORIZONTAL-LEFT
WITH PAN EXTENSION (43, 60, and 61 Sizes Only)
There are two separate pan extensions shipped with the unit. For
horizontal left installations, use the pan attached to the left shipping
bracket. For horizontal right installations, use the pan attached to the
right shipping bracket. Be sure to use the correct pan extension for the
application. There should not be any gaps between the plastic
condensate pan and the pan extension. All condensate should flow from
the pan extension to the plastic condensate pan and not leak into the coil
cabinet or duct.
NOTE: Discard the pan not used and both shipping brackets.
For horizontal-left installation, install pan extension onto left end of
horizontal-condensate pan. Pan extension is slotted to fit onto
condensate pan edge and will extend into supply plenum (Fig. 2).
A06032
Fig. 2 – Horizontal-Left Installation of Pan Extension
(43, 60 & 61 sizes only)
Shipping Brace
Remove
2 Screws
Pan Extension
CAUTION
!
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
When installing over a finished ceiling and/or living area, install a
field-fabricated secondary condensate pan under the entire unit.
Supply
Plenum Condensate Pan
Pan Extension

CNPHP: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
3
For horizontal-right, install pan extension onto right end of
horizontal-condensate pan. Pan extension is slotted to fit onto
condensate pan edge and will extend into supply plenum (Fig. 3).
A09084
Fig. 3 – Horizontal-Right Installation of Pan Extension
(43, 60, & 61 sizes only)
These units can be installed in multiple configurations. To ensure proper
performance of the system, install and orientate the components as
shown in Fig. 4. Use Table 1 and Table 2 to identify which Application
Letters (A through J) are acceptable for the furnace width and coil width
being used in a specific situation. Orientate and configure the furnace
and coil as shown in each application.
A180215A
Fig. 4 – Horizontal Installation Applications
HORIZONTAL RIGHT INSTALLATIONS
Acceptable for Air Conditioner and Heat
Pump Applications
HORIZONTAL LEFT INSTALLATIONS
Acceptable
for Air Conditioner Only Applications
Application
A
Application
F
Application
B
Application
G
Application
C
Application
H
Applications Below are allowed in some cases but not recommended
Application
D
Application
I
Application
E
Application
J
4” MINIMUM

CNPHP: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
4
NOTE: Applications inside [ ] allowed but not recommended. Grey area not permitted.
NOTE: Applications inside [ ] allowed but not recommended. Grey area not permitted.
Installation Configurations
These units can be installed on a work platform, secured to roof trusses
in the attic, suspended from hangers on floor joists in the crawl space, or
installed on blocks. See proper section and figures for detailed
installation instructions.
NOTE: Pan extension is needed for both horizontal left and right
applications. DO NOT DISCARD.
FURNACE ATTACHMENT
Attach coil to furnace
The attachment plates (3) and filler plate (1) are packaged together and
placed in the coil carton. Remove these items, verifying the number of
pieces. Use the following procedure to attach CNPHP horizontal coil to
furnace.
NOTE: Remove shipping brace from both ends of casing prior to
installation. Also remove corrugated shipping block from inside the right
end of casing prior to installation.
1. Three attachment plates are used to attach coil to furnace.
Application determines which end of the coil will be attached to the
furnace.
2. Use self-tapping screws to mount attachment plates to coil casing
(Fig. 5).
A05419
Fig. 5 – Mount Attachment Plates
3. Connect furnace snugly against coil casing.
4. Use self-tapping screws to attach furnace (Fig. 6).
5. Seal joint between coil casing and furnace to create air-tight seal
using locally-approved materials.
A05420
Fig. 6 – Attach Coil to Furnace
NOTE: If the coil and furnace are different widths, refer to Fig. 4 and
Table 1 & Table 2.
HORIZONTAL ATTIC INSTALLATION
Construct work platform to support coil/furnace combination
1. Construct work platform, using material in platform that will
support the weight of an installer or a service person.
2. Place work platform in front of discharge end of furnace.
3. Secure platform to building joists.
Install coil
To suspend CNPHP:
1. Cut metal plumbers strap to desired lengths.
2. Attach metal plumbers strap to four corners of coil casing (Fig. 7).
3. Use a minimum of two screws per corner to attach plumbers strap
to casing.
4. Position and secure coil in front of furnace discharge end.
5. Make sure coil is level for proper condensate drainage.
6. Using appropriate fasteners for duct type, connect supply-air duct
to coil.
Table 1 – Heat Pump Right Hand Applications
Furnace Width- In. (mm) Coil Width- In. (mm)
17.5 (445) 21 (533) 24.5 (622)
14 (356) B, C [B,C]
17.5 (445) A B, C, [D, E] [B,C]
21 (533) A B, C, [D, E]
24.5 (622) A
Table 2 – Air Conditioner Applications
Furnace Width- In. (mm) Coil Width- In. (mm)
17.5 (445) 21 (533) 24.5 (622)
14 (356) B, C, G, H [B,C,G,H]
17.5 (445) A, F B,C,G,H [D,E,I,J] [B,C,G,H]
21 (533) A, F B,C,G,H [D,E,I,J]
24.5 (622) A, F
Self-Tapping Screws
Drill After Coil
Is Installed

CNPHP: Installation Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
5
HORIZONTAL CRAWL SPACE INSTALLATION
As an alternate to horizontal attic installation, the CNPHP horizontal coil
can be installed in a crawl space by mounting on suitable blocks, pads or
by hanging from floor joists.
To suspend CNPHP:
1. Cut metal plumbers strap to desired lengths.
2. Attach metal plumbers strap to four corners of coil casing (Fig. 7).
3. Use a minimum of two screws per corner to attach metal plumbers
strap to casing.
4. Position and secure coil in front of furnace discharge end.
5. Make sure coil is level for proper condensate drainage.
6. Using appropriate fasteners from duct type, connect supply-air duct
to coil.
A05421
Fig. 7 – Suspension with Plumbers Strap
REFRIGERANT LINE CONNECTIONS
NOTE: Factory nitrogen charge may escape past rubber plugs during
storage. This does not indicate a leaking coil nor warrant return of the
coil.
Refrigerant lines must be configured per local building codes and the
guidelines outlined in the OD units installation instructions.
Size and install refrigerant lines according to information provided with
outdoor unit. Coil connection tube sizes are shown in Table 3. Route
refrigerant lines to the coil in a manner that will not obstruct service
access to the unit or removal of the filter.
NOTE: The filter dryer should be placed just before the indoor unit.
Connect Refrigerant Liquid and Suction Lines
For matched and mismatched systems, use line sizes recommended in
outdoor unit Installation Instructions.
The coil can be connected to outdoor units using accessory refrigerant
line sets or field-supplied lines of refrigerant grade.
See Table 3 for coil connection tube size.
The coil can be connected to outdoor units using field-supplied tubing of
refrigerant grade. Always evacuate tubing and reclaim refrigerant when
making connections or flaring tubing. Leak check connections before
insulating entire suction line.
See Table 3 for coil connection tube size.
1. Remove cabinet access door.
2. Remove rubber plugs, suction plug then liquid plug, from coil stubs
using a pulling and twisting motion. Hold coil stubs steady to avoid
bending or distorting.
3. Remove tubing plate with rubber grommets and slide plate with
grommets onto the refrigerant lines (field line-set), away from
braze joints.
4. Fit refrigerant lines into coil stubs. Wrap a heat sinking material
such as a wet cloth behind braze joints.
5. Wrap TXV and nearby tubing with a heat-sinking material such as a
wet cloth.
6. Use 1/2 psig Nitrogen purge in the suction and out the liquid line.
7. Braze using a Sil-Fos or Phos-copper alloy. Do not use soft solder.
WARNING
!
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal injury.
Wear eye protection.
Coil is factory charged with 15 psi nitrogen. The coil is under pressure
and TXV screen is in place behind liquid line plug. DO NOT remove
liquid line plug first; always remove the suction line plug first to
depressurize the coil.
2 Screws for
Attachment
to Casing
Plumbers
Strap
Table 3 – Coil Connection Tube Size
MODEL NUMBER
COIL CONNECTION TUBE SIZE
in (mm)
Liquid Suction
CNPHP2417ALA 3/8 (10) 5/8 (16)
CNPHP3017ALA 3/8 (10) 3/4 (19)
CNPHP3617ALA 3/8 (10) 3/4 (19)
CNPHP4221ALA 3/8 (10) 7/8 (22)
CNPHP4321ALA 3/8 (10) 7/8 (22)
CNPHP4821ALA 3/8 (10) 7/8 (22)
CNPHP6024ALA 3/8 (10) 7/8 (22)
CNPHP6124ALA 3/8 (10) 7/8 (22)
CAUTION
!
UNIT OR PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in property damage.
Take precautions to ensure aluminum tubes do not come in direct
contact or allow for condensate run-off with a dissimilar metal.
Dissimilar metals can cause galvanic corrosion and possible premature
failure.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in product damage.
To avoid valve damage to the refrigerant control device while brazing,
valves must be wrapped with a heat-sinking material such as a wet
cloth.