Instruction Manual

508269B01Issue 2217Page 6 of 9
Liquid Line Connection
NOTE: Before the liquid line connections can be made,
the factory-provided refrigerant metering orice must be
removed and a properly sized expansion valve must be
eld-installed.
The system must include a properly matched expansion
valve which must be eld-provided and installed. The BH1P
is shipped with a factory-installed refrigerant metering
orice. The orice must be removed BEFORE a properly
sized expansion valve is installed.
Fixed Orice Removal
1. Remove any shipping clamps holding the liquid line
and distributor assembly.
2. IMPORTANT: Using two wrenches, disconnect the
liquid line stub from the orice housing. Take care not
to twist or damage the distributor tubes during this
process.
3. Remove and discard the existing orice, valve stem
assembly (if present) and Teon ring as illustrated in
Figure 9.
4. Retain brass nut to be used later with the liquid line
assembly.
O-RING
REMOVE AND DISCARD
WHITE TEFLON® SEAL
STRAINER
DISTRIBUTOR
TUBES
LIQUID LINE
STUB
ORIFICE HOUSING
(REMOVE ORIFICE
FROM INSIDE OF
HOUSING)
BRASS
NUT
Figure 9. Typical Fixed Orice Removal
Expansion Valve / Liquid Line Installation
A properly matched expansion valve must be used with
the BH1P units. The expansion valve can be installed
internal or external to the indoor coil cabinet. Refer to
the instructions provided with the expansion valve kit for
proper installation of the valve and sensing bulb.
See the BH1P Technical Specication for approved
expansion valve match-ups and application information.
Leak Testing, Evacuating and Charging
Refer to the outdoor unit instruction for leak testing,
evacuating and charging procedures. Always leak check
entire system before charging.
The following best practices are recommended to ensure
better condensate removal:
• Main and overow drain lines should NOT be smaller
than both drain connections at drain pan.
• Overow drain line should run to an area where
homeowner will notice drainage.
• It is recommended that the overow drain line be
vented and a trap installed. Refer to local codes.
Sealing Ducts
Ensure the duct is secured and all joints are properly
sealed to the coil cabinet anges.
There must be an airtight seal between the bottom of
the furnace and the return air plenum. Use berglass
sealing strips, caulking, or equivalent sealing method
between the plenum and the air handler cabinet to
ensure a tight seal. Return air must not be drawn from a
room where this air handler or any gas-fueled appliance
(i.e., water heater), or carbon monoxide-producing
device (i.e., wood replace) is installed.
WARNING
DUCT SYSTEM SIZING - The duct system should be
properly sized and installed according to the ASHRAE
Standard Manual D. The supply and return air duct
systems should be designed for the cfm and static
requirements of the job. Consult the blower performance
chart in the unit installation instructions to verify that the
blower meets the application requirements.
IMPORTANT
Condensate Drain Connections
After removal of drain pan plug(s), check drain hole(s)
to verify that drain opening is fully open and free of any
debris. Also check to make sure that no debris has
fallen into the drain pan during installation that may plug
up the drain opening.
IMPORTANT
Main Drain
Connect the main drain and route downward to drain line
or sump. Do not connect drain to a closed waste system.
See Figure 11 for typical drain trap conguration.
Overow Drain
It is recommended that the overow drain is connected to
a overow drain line for all units. If overow drain is not
connected, it must be plugged with provided cap.