Installer’s Guide
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
IMPORTANT — This Document is customer property and is to remain with this unit. Please return to service information pack upon
completion of work.
2. INDOOR UNIT AIRFLOW
Indoor unit must provide the required airow for the heat
pump or cooling combinations approved for this coil.
IMPORTANT:
Review your installation requirements. Check the table on
the outline drawing and note all dimensions for your coil
before beginning the installation.
Table of Contents
General .................................................................................1
Application Information ......................................................1
Recommendation ................................................................2
Furnace in Upow Position ................................................2
Furnace in Downow Position ...........................................2
Maximum Airow Setting (CFM) .......................................3
Installing / Brazing Refrigerant Lines ................................3
Leak Check ..........................................................................3
Condensate Drain Piping ....................................................4
Cleaning the Coil .................................................................4
Outline Drawing ...................................................................5
Troubleshooting Indoor TXV / Cooling Mode ...................6
Figure 1
18-AD43D1-1C-EN
Cased Aluminum Coil "Dedicated Upow/Downow"
Convertible to horizontal with separately purchased kit
Upow model:
4PXCBU36BS3HAC
4PXCBD36BS3HDC
4PXCDU60BS3HAC
4PXCDD60BS3HDC
NOTE:
OPTIONAL DOWNFLOW GASKET INSTALLATION: For
unusually humid applications that expect prolonged
operation above 70% RH, it is recommended to use the
BAYGSKT001A0 gasket kit to prevent water from forming
on the bottom of the drain pan and dripping into the
supply ductwork.
NOTE:
4PXC upow coils may be installed in Upow, Downow,
Horizontal Right with kit, and Horizontal Left with kit.
4PXC downow coils may be installed in Downow and
Horizontal Right with kit.
1. FURNACE AND COIL
The coil MUST BE installed downstream (in the outlet air)
of the furnace.
This product can expose you to chemicals including
lead, which are known to the State of California to cause
cancer and birth defects or other reproductive harm. For
more information go to www. P65Warnings.ca.gov
A. GENERAL
This coil is designed for use in combination with a heat pump or
cooling outdoor section using R-410A REFRIGERANT.
The 4PXC equipment has been evaluated in accordance with
the Code of Federal Regulations, Chapter XX, Part 3280 or the
equivalent. “Suitable for Mobile Home use” The height of the
Furnace, Coil and discharge duct work must be 7 ft. or less.
Inspect the coil for shipping damage. Notify the transportation
company immediately if the coil is damaged.
B. APPLICATION INFORMATION
WARNING (Medium/high pressure)
Contains Refrigerant!
System contains oil and refrigerant under high pressure.
Recover refrigerant to relieve pressure before opening the
system. See unit nameplate for refrigerant type. Do not
use non-approved refrigerants, refrigerant substitutes, or
refrigerant additives.
Failure to follow proper procedures or the use of non-
approved refrigerants, substitutes, or refrigerant additives
could result in death, serious injury, or equipment damage.
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