508452C01 Issue 2428 Page 1 of 8
215 Metropolitan Drive
West Columbia, SC 29170
This manual must be left with the homeowner for future reference.
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
WARNING
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves
and protective clothing.
CAUTION
The Clean Air Act of 1990 bans the intentional venting
of refrigerant (CFCs, HCFCs and HFCs) as of July
1, 1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarceration
may be levied for noncompliance.
IMPORTANT
(P) 508452C01
*P508452C01*
INSTALLATION INSTRUCTIONS
BC7*C-01 R410A Upow Indoor Coils
If installing in an R454B application, R454B coil sensor
kit (26Z69), Refrigerant Detection System Control
(27A05) and R454B TXV (26Z70, 26Z71, or 26Z72)
must be ordered.
If installing in an R454B application, use installation
instructions provided in R454B coil conversion kit
(26Z69).
For sensor maintenance recommendations refer to the
instructions in kit 26Z69.
For non-communicating furnaces, order kit 27A05.
IMPORTANT
Every working procedure that aects safety means shall
only be carried out by competent persons. This appliance
is not to be used by persons (including children) with
reduced physical, sensory or mental capabilities, or
lack of experience and knowledge, unless they have
been given supervision or instruction concerning use of
the appliance by a person responsible for their safety.
Children should be supervised to ensure they do not
play with the appliance.
WARNING
Maximum altitude of application is 10,500’ feet (3200m)
above sea level.
WARNING
508452C01Issue 2428Page 2 of 8
Model Number Identication
B C 7 36 C B T XX
B = Private Label
C = Coil
7 = R454B
Nominal Capacity
Major and Minor Revision
Matching Gas Furnace
Cabinet Width
A = 14.5
B = 17.5
C = 21
D = 24
C = Upow Cased
Metering Device
T = TXV Factory Installed
508452C01 Issue 2428 Page 3 of 8
NOTE: This unit is a PARTIAL UNIT AIR CONDITIONER,
complying with PARTIAL UNIT requirements of this
Standard, and must only be connected to other units
that have been conrmed as complying to corresponding
PARTIAL UNIT requirements of this Standard, UL 60335-
2-40/CSA C22.2 No. 60335-2-40, or UL 1995/CSA C22.2
No 236.
NOTE: PARTIAL UNITS shall only be connected to an
appliance suitable for the same refrigerant.
NOTE: Special procedures are required for cleaning the
aluminum coil in this unit. See Page 7 in this instruction
for information.
General
The BC7*C-01 upow evaporator coils are available cased
only and include an externally equalized factory-installed
HFC-410A check/expansion valve.
The coil drain pan has a maximum service temperature
of 500°F. The drain pan must be at least 2" away from a
standard gas-red furnace heat exchanger and at least
4"-6” away from any drum-type or oil-red furnace heat
exchanger, depending on furnace model. Closer spacing
may damage the drain pan and cause a leak.
Refer to the Product Specication for the proper use of
these coils with specic furnaces, air handlers, condensers
and line sets.
These instructions are intended as a general guide and
do not supersede local or national codes in any way.
Authorities who have jurisdiction should be consulted
before installation.
Shipping and Packing List
Package 1 of 1 contains:
1 – BC7*C-01 evaporator coil
Check the components for shipping damage; if found,
immediately contact the last carrier.
Releasing Air Charge
The coil is shipped from the factory pressurized with dry
air. Pierce a hole in the rubber plug that seals the vapor
line to relieve the pressure before removing the plugs.
CAUTION
NOTE: If there is no pressure released when the vapor
line rubber plug is pierced, check the coil for leaks before
continuing with the installation.
The BC7*C-01 coils are shipped with a 10 ± 3 psi dry air
holding charge. Puncture the suction line rubber plug to
release the charge. Remove the rubber plug. Ensure that
the coil is void of pressure.
Installation
Air Leakage
All indoor cabinets MUST be taped after installation to seal
against any air leaks. System performance and eciency
will be reduced if air leakage exists.
Risk of explosion or re.
Can cause injury or death.
Recover all refrigerant to relieve pressure before
opening the system.
WARNING
Install the furnace or air handler and condensing unit
according to the installation instructions provided with the
unit.
Position the cased coil on top of the furnace or air handler
cabinet and secure it using eld-provided screws.
NOTE: If the coil is to be installed on an oil furnace, it may
be necessary to install a eld-installed transition between
the furnace and the coil to prevent airow restriction and
possible damage to the coil drain pan. See the oil furnace
installation instructions for details.
NOTE: The coil cabinet has six screw clearance holes
which should be aligned with the furnace engagement
holes. Secure the coil cabinet to the furnace or air handler
using six eld-provided #8 X 1" screws.
Refrigerant Line Connections
Line Sizes
The refrigerant line sets should be sized according to the
recommendations given in the condensing unit installation
instructions. Use Table 1 to determine correct braze
connection sizes. A eld-provided adapter may be required
to match line set connections.
Model Number Suction Liquid
-18/24,-24, -30,
-30/36,-36
3/4 Inch
3/8 Inch
-48, -49, -50, -50/60,-
60
7/8 Inch
Table 1. Refrigerant Line Connections
508452C01Issue 2428Page 4 of 8
Suction Line Connection
Use the following procedure to connect the suction line to
the indoor coil:
1. Remove rubber plug from the stubbed connection.
2. Position the properly sized refrigerant piping and
make the brazed connection following the brazing
guidelines.
3. Do not remove the water-saturated rags from the
cabinet and piping until the piping has cooled
completely.
BC7*C-01 Liquid Line Connection
BC7*C-01 coils include a factory-installed HFC-410A
check/ expansion valve metering device.
Connect the properly sized eld-provided liquid line to
the liquid line stub as shown in Figure 3 using one of the
following procedures:
1. Position the properly sized refrigerant piping and
make the brazed connection following the brazing
guidelines.
2. Do not remove the water-saturated rags from the
cabinet and piping until the piping has cooled
completely.
OR
1. Cut the copper liquid line on a vertical or horizontal
section. Use a eld-provided coupling to join the
properly sized eld-provided refrigerant piping and
the liquid line stub on the coil. Follow the brazing
guidelines.
2. Do not remove the water-saturated rags from the
cabinet and piping until the piping has cooled
completely.
COIL LIQUID LINE
UNBRAZE AT FITTING
CUT TWO INCHES UP
CUT TWO INCHES OUT
COUPLING
SWEDGED CONNECTION
or
NOTE - Use the coupling at either of the two cut connections.
REMOVE AND DISCARD
VALVE STEM ASSEMBLY
(IF PRESENT)
Figure 3. BC7*C-01 Liquid Line Connections
Replacement Parts
If replacement parts are necessary, order kit 69J46. The
kit includes:
• 10 – Brass nuts for liquid line assemblies
• 20 – Teon rings
• 10 – Liquid line orice housings
• 10 Liquid line assemblies
TEFLON RINGS (20)
BRASS NUTS (10)
LIQUID LINE ASSEMBLIES
(INCLUDES STRAINER) (10)
LIQUID LINE ORIFICE HOUSINGS (10)
LIQUID LINE
ASSEMBLY
COPPER
TUBE
PISTON
RETAINER
STRAINER
Figure 1. 69J46 Kit Components
Brazing Guidelines
NOTE: For R454B refrigerant installations, do not braze
the line set to the evaporator coil until the outdoor unit is
installed. Line set joint sleeves must be installed on the
liquid and suction lines prior to line set brazing. Refer
to R454B Coil Conversion Kit (26Z69) instructions for
installation details.
Use a silver alloy brazing rod (5 or 6 percent silver alloy for
copper-to-copper connections or 45 percent silver alloy for
copper-to-brass or copper-to-steel connections).
Before making brazed connections, place a eld-provided
heat shield, such as a wet rag, against the unit cabinet and
around the piping stubs, expansion valve, sensing bulb
and line set joint sleeve, if present. The heat shield must
be in place to prevent heat damage during brazing. See
Figure 2.
WATER-
SATURATED
RAGS
PLACE A WET RAG AGAINST
COIL CABINET AND AROUND
THE SUCTION LINE
CONNECTION.
BRAZE CONNECTION. ALLOW
PIPE TO COOL BEFORE
REMOVING WET RAG.
1
2
Figure 2. Braze Refrigerant Lines
508452C01 Issue 2428 Page 5 of 8
Leak Testing, Evacuating and Charging
NOTE: Refrigerant system installations shall be installed
and tested per ASHRAE Standard 15.2, Section 10.0
(latest edition).
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 overow drain lines should NOT be smaller
than both drain connections at drain pan.
• Overow drain line should run to an area where
homeowner will notice drainage.
• It is recommended that the overow drain line be
vented and a trap installed. Refer to local codes.
Sealing Ducts
Ensure that 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 the 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
ABOVE
FINISHED
SPACE?
OVERFLOW DRAIN LINE
ALWAYS RUN AN OVERFLOW DRAIN LINE. IF NOT POSSIBLE TO
ROUTE OVERFLOW DRAIN LINE, INSTALL LOW VOLTAGE
OVERFLOW SWITCH KIT. WIRE KIT TO SHUT DOWN
COMPRESSOR PER INSTRUCTIONS.
NO
YES
CLEAN OUT
VENT
PRESS IN
(DO NOT GLUE)
VENT MUST EXTEND
ABOVE HEIGHT OF
COIL DRAIN PAN BY
TWO INCHES
1” X 3/4” X 3/4”
REDUCING
TEE WITH
PLUG
PVC
SCH 40 P- OR
J-TRAP 3/4”
OVERFLOW
DRAIN
OPTIONAL
SAFETY
PAN
COIL DRAIN PAN
WHEN A COIL IS LOCATED ABOVE A FINISHED SPACE, A 3/4” SECONDARY DRAIN LINE
MUST BE:
● CONNECTED TO SECONDARY DRAIN PAN
OR
●CONNECTED TO THE OVERFLOW DRAIN OUTLET OF THE AIR HANDLER DRAIN PAN.
TRAPS MUST BE DEEP ENOUGH TO OFFSET MAXIMUM STATIC DIFFERENCES —
GENERALLY, TWO INCHES.
DRAIN LINE SHOULD
SLOPE A MINIMUM OF
ONE INCH PER 10 FT.
NOTE — WHEN A AIR HANDLER IS LOCATED ABOVE A FINISHED SPACE THE SECONDARY
DRAIN PAN MUST HAVE A LARGER FOOTPRINT THAN THE AIR HANDLER.
MAIN
DRAIN
TO APPROVED
DRAIN
FOR NEGATIVE PRESSURE COILS (BLOWER
AFTER COIL) TRAPS ARE REQUIRED ON ALL
DRAIN LINES CONNECTED TO COIL.
COMPACT OVERFLOW SWITCH WITH 3/4” FEMALE SLIP INLET
AND MALE ADAPTER, TWO PART DESIGN FOR USE WHERE
OBSTRUCTIONS PREVENT DIRECT THREADING
SECONDARY
DRAIN PAN
2”
(51MM)
TRAP DEPTH
Figure 4. Typical Main and Overow Drain Installations
508452C01Issue 2428Page 6 of 8
Condensate Drain Connections
Main Drain
Connect the main drain and route drain tubing downward to
drain line or sump. Do not connect drain to a closed waste
system. See Figure 4 for typical drain trap conguration.
Overow Drain
It is recommended that the overow drain stub be connected
to an overow drain line for all units. If the overow drain is
not connected to a drain line, it must be plugged with the
provided cap.
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
Condensate Drain Recommendations
The following practices are recommended to ensure better
condensate removal:
• Main and overow drain lines should NOT be smaller
than both drain connections at drain pan.
• Overow drain line should run to an area where
homeowner will notice drainage.
• It is recommended that the overow drain line be
vented and a trap installed. Refer to local codes.
Blower Speed Selection
LEFT-HAND AIR
DISCHARGE (TOP VIEW)
TEST HOLES
AIR FLOW
Figure 5. Static Pressure Test
Take care when drilling test holes into the furnace ange
and the duct. Drill holes away from refrigerant piping.
Test holes should be drilled where specied in order to
avoid unit damage.
CAUTION
Proper air volume must be provided over the evaporator
coil. Select a blower motor speed tap that will provide 400
± 50 CFM per 12,000 Btuh of cooling capacity (wet coil). A
static pressure reading must be taken to see if the pressure
drop falls within the proper range. See Table 2.
To ensure accuracy, air must be read from below the coil
and above the coil. See Figure 5 for an example to obtain
an accurate reading.
1. Drill one 5/16” air test hole into the delta plate between
the coil slabs.
2. Drill one 5/16” air test hole into the duct above the top
of the coil.
3. Connect the instrument for static pressure
measurement hoses to the air entering side of coil.
Insert the hoses so that 1/4” extends inside the duct or
end seal. Seal around holes with Permagum®.
4. Turn on electrical power to the furnace and set the
thermostat to initiate a cooling demand.
5. Table 2 lists air volumes and equivalent static pressure
readings for these units. Observe the static pressure
reading. If the reading is below the required air
volume, increase the blower speed; if the reading is
above the required air volume, decrease the blower
speed. Refer to the furnace wiring diagram for blower
speed settings.
6. When the required static pressure readings are
obtained, remove the test hose lines and insert snap
hole plugs into test holes.
508452C01 Issue 2428 Page 7 of 8
Cabinet
Vol: CFM
Drop: in. w.g.
Model Width in. Dry Wet
18/24A
14-1/2 600 .11 .17
14-1/2 800 .18 .25
18/24B
17-1/2 600 .11 .17
17-1/2 800 .18 .25
24A 14-1/2 800 .16 .18
24B 17-1/2 800 .16 .18
30A 14-1/2 1000 .18 .20
30B 17-1/2 1000 .18 .20
30/36A
14-1/2 1000 .19 .21
14-1/2 1200 .27 .30
30/36B
17-1/2 1000 .13 .16
17-1/2 1200 .17 .21
30/36C
21 1000 .13 .16
21 1200 .17 .21
36A 14-1/2 1200 .27 .30
36B 17-1/2 1200 .17 .21
48B
17-1/2 1400 .23 .24
17-1/2 1600 .30 .31
48C
21 1400 .13 .16
21 1600 .16 .20
49C 21 1600 .17 .22
50/60C 21 1600 .23 .29
60C 21 2000 .29 .34
60D 24-1/2 2000 .21 .27
Table 2. Air Volume / Static Pressure Drop Across Coil
Nameplate Marking
Prior to installing the front panel, mark the unit nameplate
to permanently identify the refrigerant conguration.
Nameplate example shown in Figure 6 below:
Maintenance
Failure to follow instructions will cause damage to the
unit.
This unit is equipped with an aluminum coil. Aluminum
coils may be damaged by exposure to solutions with a
pH below 5 or above 9. The aluminum coil should be
cleaned using potable water at a moderate pressure
(less than 50psi). If the coil cannot be cleaned using
water alone, it is recommended to use a coil cleaner
with a pH in the range of 5 to 9. The coil must be rinsed
thoroughly after cleaning.
In coastal areas, the coil should be cleaned with potable
water several times per year to avoid corrosive buildup
(salt).
NOTE
A trained technician or service agency must perform
maintenance and service on equipment. At the beginning
of each heating or cooling season, indoor coils should be
cleaned.
Do not use hydrouoric acid, alkaline, or similar chemicals
on coils. These chemicals are not necessary to dissolve
salt, and may damage the n coating. Acid washes are
used to dissolve oils and greases, which generally are not
present on most installations.
Do not use alkaline washes. Alkaline washes are useful
for dissolving oxides such as zinc oxide, aluminum oxide,
and iron oxide (rust). However, these three oxides are
more corrosion resistant than base metals, so dissolving
or removing them will cause an increase in corrosion.
Cleaning the Coil
The coil should be inspected twice each year and cleaned
at least once per year or more, if necessary. Indoor coil
cleaning should be performed by a licensed professional
service technician (or equivalent).
A damaged coil n can aect equipment operation and
performance. Do not use ame, high-pressure water,
steam, or volatile cleaners on ns or tubing surfaces. If
cleaning requires the use of acidic or alkaline cleaners,
follow the manufacturer’s instructions. Thoroughly ush
cleaner from all equipment components. (Be careful
to prevent damage or corrosion of the components
connected to the system or areas surrounding the
equipment being cleaned.)
CAUTION
1. Before beginning this or any other maintenance,
turn o all power to the indoor unit at the main unit
disconnect switch. It is also recommended that you
Figure 6. Nameplate Marking
508452C01Issue 2428Page 8 of 8
wear personal protective gear: safety glasses and/or a
face shield, waterproof clothing and gloves.
2. Remove the coil from the cabinet or plenum, and take
the coil to an appropriate place to clean it.
3. Vacuum or brush the coil to remove matted and
surface debris from the ns. Use vacuum attachments
and /or brushes that are non-destructive to ns.
4. If oil deposits are present, spray the coil with a mild
household liquid detergent to soften deposits. Do
not leave the detergent on the coil for more than 10
minutes. Flush the coil thoroughly with potable water.
NOTE: For units in coastal regions, fresh water will
dissolve away any salt deposits. (Wash coils with fresh
water at least every six months.)
5. Spray the coil at a vertical angle of 30 to 45 degrees
with a constant stream of water at moderate pressure.
A pressure washer with a fan nozzle will work best. Do
not spray the coil from a horizontal direction.
6. Direct the spray so that any debris is washed out of the
coil and base pan. For most residential units, hot water
is not necessary.
NOTE: Attempting to back ush from the inside of the
coil will require removing parts from the unit, and it
may be very dicult to ush the whole coil surface.
Attempting to blow water through a coil will slow the
water stream and reduce the ushing action of the
outer n surface.
7. Replace the coil into the cabinet or plenum. Ensure
that you have followed the proper procedure for routing
and securing the refrigerant tubing.
Ensure that the distributor lines are not rubbing together
or kinked. All tubes must have enough clearance from
other metal parts. Use wire ties to secure tubes to
prevent movement that could cause the refrigerant
tubing to fail.
IMPORTANT
Use of Coil-Furnace System During Construction
OEM does not recommend the use of its coil-furnace
system during any phase of construction. Very low return
air temperatures, harmful vapors and operation of the unit
with clogged or misplaced lters will damage the unit.
Coils may be used for heating (heat pumps) or cooling of
buildings under construction, if the following conditions are
met:
• A room thermostat must control the air handler. The
use of xed jumpers is not allowed.
• Air lter must be installed in the system and must be
maintained during construction.
• Air lter must be replaced upon construction
completion.
• The evaporator coil, furnace supply fan assembly and
duct system must be thoroughly cleaned following
nal construction clean-up.
• All coil and furnace operating conditions must be
veried according to these installation instructions.
• R454B applications only: If refrigerant leak detection
sensor kit has been installed, ensure that sensor
opening is clear and free of debris. Follow sensor
maintenance recommendations as outlined in sensor
kit instructions.
Decommissioning
Before decommissioning, it is essential that the technician
is completely familiar with the equipment and all its detail.
It is recommended good practice that all refrigerants are
recovered safely.
Before performing this task, an oil and refrigerant sample
shall be taken in case analysis is required prior to re-use
of recovered refrigerant. It is also essential that electrical
power is available before starting decommissioning.
1. Become familiar with the equipment and its operation.
2. Isolate system electrically.
3. Before attempting the procedure, ensure that:
a. mechanical handling equipment is available, if
required, for handling refrigerant cylinders;
b. all personal protective equipment is available and
being used correctly;
c. the recovery process is supervised at all times by
a competent person;
d. recovery equipment and cylinders conform to the
appropriate standards.
4. Pump down refrigerant system, if possible.
5. If a vacuum is not possible, make a manifold so that
refrigerant can be removed from various parts of the
system.
6. Make sure that cylinder is situated on the scales before
recovery takes place.
7. Start the recovery machine and operate in accordance
with instructions.
8. Do not overll cylinders (no more than 80% volume
liquid charge).
9. Do not exceed the maximum working pressure of the
cylinder, even temporarily.
10. When the cylinders have been lled correctly and the
process completed, make sure that the cylinders and
the equipment are removed from site promptly and all
isolation valves on the equipment are closed o.
11. Recovered refrigerant shall not be charged into
another REFRIGERATING SYSTEM unless it has
been cleaned and checked.
