Bosch BMAC2430ANTD User manual

Bosch Multi-Position Cased Coils
Cooling and Heat Pump Compatible
BMAC Series
Installation Manual

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|Bosch Multi-Position Cased Coils Installation Manual
03.2017 |Bosch Thermotechnology Corp.Data subject to change

Installation Manual Bosch Multi-Position Cased Coils | 3
Bosch Thermotechnology Corp. | 03.2017 Data subject to change
Table of Contents
1 Key to symbols and safety instructions 4
1.2 Safety 4
2 General 5
2.1 Codes & regulations 5
2.2 Inspection upon unit arrival 5
2.3 Clearances 5
2.4 Dimensional data 6
3 Installation Instructions 9
3.1 Parts 9
3.2 Pre-installation instructions 9
3.3 Installation and trap connection 9
4 Drain application 10
4.1 Condensate drain piping 10
4.2 Plastic drain pan installation 10
5 Refrigerant connections 12
5.1 Airflow performance [CFM vs pressure drop]: 12
6 TXV replacement information 14

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|Bosch Multi-Position Cased Coils Installation Manual
03.2017 |Bosch Thermotechnology Corp.Data subject to change
1 Key to symbols and safety instructions
1.1 Key to symbols
Warnings
Warnings in this document are identified by a
warning triangle printed against a grey background.
Keywords at the start of a warning indicate the type and seriousness
of the ensuing risk if measures to prevent the risk are not taken.
The following keywords are defined and can be used in this document:
DANGER indicates a hazardous situation which, if not avoided, will result in
death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided, could
result in minor to moderate injury.
NOTICE is used to address practices not related to personal injury.
Important information
This symbol indicates important information where
there is no risk to people or property.
1.2 Safety
Please read safety precautions before installation
WARNING:
These instructions are intended as an aid to qualified licensed
service personnel for proper installation, adjustment and
operation of this unit. Read these instructions thoroughly
before attempting installation or operation. Failure to follow
these instructions may result in improper installation,
adjustment, service or maintenance and possibly resulting
in fire, electrical shock, property damage, personal injury or
death.
WARNING:
Disconnect all power to the unit before starting any service
and maintenance. Failure to do so could cause severe
electrical shock resulting in personal injury or death.
WARNING: INSTALLATION REQUIREMENTS
Installation or servicing of this unit can be hazardous due
to parts, compo - nents and system pressure. Qualified and
proper trained service personnel should perform installation
and repai r . Failure to do so could cause severe electrical
shock resulting in personal injure or death.

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2 General
These coils are approved for upflow or downflow, vertical and horizontal installation.
For furnace applications, the coil must be installed downstream (in the air outlet) of
the furnace.
2.1 Codes & regulations
This product is designed and manufactured to comply with national codes.
Installation in accordance with such codes and/or prevailing local codes/regulations
is the responsibility of the installer . The manufacturer assumes no responsibility for
equipment installed in violation of any codes or regulations.
The United States Environmental Protection Agency (EPA) has issued various
regulations regarding the introduction and disposal of refrigerants. Failure to follow
these regulations may harm the environment and can lead to the imposition of
substantial fines. Should you have any questions please contact the local office of
the EPA.
2.2 Inspection upon unit arrival
As soon as unit is received, it should be inspected and noted for possible shipping
damage during transportation. It is carrier ’s responsibility to cover the cost
of shipping damage. Manufacturer or distributor will not accept a claim from
contractors for any transportation damage.
2.3 Clearances
Following clearances should be provided during installation:
1. Maintenance and service access, including coil cleaning and coil assembly
removal
2. Refrigerant piping and connections
3. Condensate drain line
For ensure the proper installation, Select a solid and level site. Ensure enough space
required for installation and maintenance.
’
’0
2≥
AIRFLOW
Figure 1 Clearance -front view (including air duct)
ıʾ
ı
ıʾ
Front of unit
ıʾ
Figure 2 Clearance - top view (including air duct)

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2.4 Dimensional data
LIQUID LINE CONNECTION
VAPOR LINE CONNECTION
APOR LINE CONNECTION
AUXILIARY DRAIN CONNECTION
3/4'' NPT FEMALE PIPE THREAD
TOP AIR STOP
'
'02
1W
AUXILIARY DRAIN CONNECTION
AUXILIARY DRAIN
CONNECTION
3/4'' NPT FEMALE PIPE THREAD
3/4'' NPT FEMALE
PIPE THREAD
PRIMARY DRAIN CONNETION
PRIMARY DRAIN
CONNETION
3/4'' NPT FEMALE PIPE THREAD
3/4'' NPT FEMALE
PIPE THREAD
VAPOR LINE CONNECTION
COPPER (SWEAT)
LIQUID LINE CONNECTION
COIL ACCESS
PANEL
”1
2
W
H
”
91
A
Figure 3
Model Dimensions inch [mm] Weight /Shipping
(LBS [kg])
Unit Height "H" Unit Width "W" Supply Duct "A" "W1" Liquid line /Vapor Line
BMAC2430ANTD 20 [508] 14½ [368] 13 [330] 13½ [343] ⅜ / ¾ 44.1 / 64.8 [20.0/29.4]
BMAC2430BNTD 20 [508] 17½ [445] 16 [407] 16½ [419] ⅜ / ¾ 46.7 /69.7[21.2/31.6]
BMAC2430CNTD 20 [508] 21 [553] 19½ [495] 20 [508] ⅜ / ¾ 50.5/77.6[22.9/35.2]
BMAC3036ANTD 20 [508] 14½ [368] 13 [330] 13½ [343] ⅜ / ¾ 44.1/64.8[20.0/29.4]
BMAC3036BNTD 20 [508] 17½ [445] 16 [407] 16½ [419] ⅜ / ¾ 46.7/69.7[21.2/31.6]
BMAC3036CNTD 20 [508] 21 [553] 19½ [495] 20 [508] ⅜ / ¾ 50.5/77.6[22.9/35.2]
Table 1

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LIQUID LINE CONNECTION
VAPOR LINE CONNECTION
AUXILIARY DRAIN CONNECTION
3/4'' NPT FEMALE PIPE THREAD
TOP AIR STOP
''
0
2
1
W
AUXILIARY DRAIN CONNECTION
AUXILIARY DRAIN
CONNECTION
3/4'' NPT FEMALE PIPE THREAD
3/4'' NPT FEMALE
PIPE THREAD
PRIMARY DRAIN CONNETION
PRIMARY DRAIN
CONNETION
3/4'' NPT FEMALE PIPE THREAD
3/4'' NPT FEMALE
PIPE THREAD
VAPOR LINE CONNECTION
COPPER (SWEAT)
LIQUID LINE CONNECTION
COIL ACCESS
PANEL
”12
W
H
”
9
1
A
Figure 4
Model Dimensions inch [mm] Weight /Shipping
(LBS [kg])
Unit Height "H" Unit Width "W" Supply Duct "A" "W1" Liquid line /Vapor Line
BMAC4248BNTF 30 [762] 17½ [445] 16 [407] 16½ [419] ⅜ /⅞ 67.7/91.7[30.7/41.6]
BMAC4248CNTF 30 [762] 21 [533] 19½ [495] 20 [508] ⅜ /⅞ 71.4/99.9[32.4/45.3]
BMAC4248DNTF 30 [762] 24½ [622] 23 [584] 23½ [597] ⅜ /⅞ 75.0/107.8[34.0/48.9]
Table 2

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LIQUID LINE CONNECTION
VAPOR LINE CONNECTION
AUXILIARY DRAIN CONNECTION
3/4'' NPT FEMALE PIPE THREAD
TOP AIR STOP
''02
1W
AUXILIARY DRAIN CONNECTION
AUXILIARY DRAIN
CONNECTION
3/4'' NPT FEMALE PIPE THREAD
3/4'' NPT FEMALE
PIPE THREAD
PRIMARY DRAIN CONNETION
PRIMARY DRAIN
CONNETION
3/4'' NPT FEMALE PIPE THREAD
3/4'' NPT FEMALE
PIPE THREAD
VAPOR LINE CONNECTION
COPPER (SWEAT)
LIQUID LINE CONNECTION
COIL ACCESS
PANEL
”
1
2
W
H
”9
1
A
Figure 5
Model Dimensions inch [mm] Weight /Shipping
(LBS [kg])
Unit Height "H" Unit Width "W" Supply Duct "A" "W1" Liquid line /Vapor Line
BMAC4860CNTF 30 [762] 21 [533] 19½ [495] 20 [508] ⅜ /⅞ 82.2/109.6[37.3/49.7]
BMAC4860DNTF 30 [762] 24½ [622] 23 [584] 23½ [597] ⅜ /⅞ 86.4/117.0[39.2/53.1]
Table 3

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3 Installation Instructions
3.1 Parts
Contact your distributor for authorized replacement parts.
3.2 Pre-installation instructions
Carefully read all instructions for installation prior to installing product. Make sure
each step or procedure is understood and any special considerations are taken
into account before starting installation. Assemble all tools, hardware and supplies
needed to complete the installation. Some items may need to be purchased locally.
Make sure everything needed to install the product is on hand before starting.
3.3 Installation and trap connection
1. See Fig.6 & 7 for coil installation and drain connection.
2. Installation steps for cased coil:
A. Shut off or disconnect gas furnace’s power and remove gas pipe if
necessary.
B. Disconnect and remove a sufficient portion of the supply ductwork to
provide clearance for the cased coil.
C. Ensure that the coil is level. Seal the gap between coil and furnace.
See Figure 6 & 7. In case that coil and furnace sizes are not matched, use
proper size of sheet metal or other material to fill the gap and seal the gap
to prevent air leak
D. Reconnect the ductwork to the coil case, and seal any leakage.
E. Reconnect power line on gas furnace, turn on the furnace to check any sign
of leakage.
Vertical Drain Conditions
(All other drain connections should be plugged)
↑↑
Upflow Discharge
Primary Drain
Alternate Drain
Alternate Drain
Primary Drain
ecanr
u
F
ecanruF
↑↑
Downflow Discharge
Upflow Drain Connection Downflow Drain Connection
Figure 6
Horizontal Drain Conditions
(All other drain connections should be plugged)
Furnace
Horizontal Drain
↑↑
Right Hand
Discharge
Furnace
↑↑
Left Hand
Discharge
Horizontal Drain
Figure 7

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4 Drain application
4.1 Condensate drain piping
Consult local codes for special requirements.
To provide extra protection from water damage, it is always recommended to install
an additional drain pan, provided by installer, under the entire unit with a separate
drain line. Manufacturer will not be responsible for any damages due to the failure to
follow these recommendations.
4.2 Plastic drain pan installation
WARNING:
Do not use the coil pan shipped with the unit on OIL furnaces
or any application where the temperature of the drain pan
may exceed 275 °F . A field fabricated metal drain pan can
also be used for these type of applications. Failure to follow
this warning may result in property damage and/or personal
injury.
The coil drain pan has a primary and an optional secondary drain with 3/4” NP T
female connections; use either PVC or copper pipe and hand tighten to a torque of
approximately 37 in-lbs. to prevent damage to the drain pan connection. An insertion
depth between .355 to .485 inches (3-5 turns) should be expected at this torque
setting.
Use male 3/4” NPT threaded fitting for outside connection and make sure the drain
holes are not blocked.
Insulation may be needed for drain line to prevent sweating.
Drain pan has two drain connections on each side to provide flexibility of connection
and drainage. Make sure pan has proper pitch and plugged if second connection is
not used.
If the secondary drain line is required, run the line separately from the primary drain
and terminate it where it can be easily seen.
Water coming from this line means the coil primary drain is plugged and
needs clearing.
Install a trap in the drain line below the bottom of the drain pan. If using a copper
drain line, solder a short piece of pipe to the connector before installing a drain
fitting. DO NO T over torque the 3/4” copper connector to the plastic drain
connection. Use a wet rag or heatsink material on the short piece to protect plastic
drain pan, complete the drain line installation (Fig.8 ). Use (Fig.9) as a template
for typical drain pipe routing. This figure shows how to avoid interference with vent
piping.

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CONDENSATE DRAIN TRAP
Unit
DO NOT OVERTIGHTEN DRAIN FITTING
TOWARD DRAIN CONNECTION
UNIT MUST BE SLIGHTLY INCLINED
"
2
"2
TO APPROVED DRAIN
The condensate trap is not mandatory
but is recommended for efficiency.
Figure 8
secondary
primary
secondary
primary
Figure 9

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5 Refrigerant connections
NOTICE:
Gently remove the sealing plug of vapor line, use one wrench
to fix the valve base, loosen the nut with another wrench,take
out the flange pad and and sealing ring. The nitrogen pressure
is about 10 PSIG.
To prevent refrigerant leak, use proper tools to ensure clean, burr-free cut.
NOTICE:
TXV bulb MUST be protected (wrapped with wet rag) or
removed, while brazing the tubing. Overheating of the
sensing bulb will affect the functional characteristics and
performance of the comfort coil.
Use brazing shield when brazing close to the cabinet surface and wet rag to protect
rubber grommet. Brazing alloy should be at least 5% silver content.
5.1 Airflow performance [CFM vs pressure drop]:
Model Pressure Drop (Inches of Water)
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4
BMAC2430ANTD 307 485 618 729 823 911 991 1063
BMAC2430BNTD 327 527 682 810 925 1024 1122 1217
BMAC2430CNTD 360 585 748 893 1019 1132 1238 1348
BMAC3036ANTD 307 485 618 729 823 911 991 1063
BMAC3036BNTD 327 527 682 810 925 1024 1122 1217
BMAC3036CNTD 360 585 748 893 1019 1132 1238 1348
BMAC4248BNTF 456 638 810 953 1077 1191 1284 1390
BMAC4248CNTF 505 726 932 1098 1244 1375 1494 1604
BMAC4248DNTF 533 857 1105 1319 1509 1675 1824 1956
BMAC4860CNTF 439 699 906 1071 1224 1362 1487 1589
BMAC4860DNTF 466 764 978 1157 1313 1466 1590 1695
Table 2 Pressure drop for cooling and heat pump coils
*Data based on wet coil with entering air at 80°F DB / 67°F WB without air filter.

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Water blow-off could occur in certain installation positions if the airflow
setting exceeds the maximum values listed.
Model / Coil
Maximum airflow setting,CFM
Upflow Horizontal Left Downflow Horizontal Right
BMAC2430ANTD 1125 1050 1050 1125
BMAC2430BNTD 1125 1050 1050 1125
BMAC2430CNTD 1250 1200 1050 1250
BMAC3036ANTD 1200 1050 1050 1200
BMAC3036BNTD 1250 1200 1050 1250
BMAC3036CNTD 1250 1200 1050 1250
BMAC4248BNTF 1800 1800 1700 1500
BMAC4248CNTF 1800 1800 1700 1700
BMAC4248DNTF 1800 1800 1700 1800
BMAC4860CNTF 1850 1850 1750 1750
BMAC4860DNTF 2000 2000 1850 1850
Table 3

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6 TXV replacement information
The TXV replacement options noted in this sheet supersede those in the
installation guide. Please reference this sheet for all refrigerant metering
options.
1. Remove the screws and front coil panel.
2. Remove the rubber plugs from the liquid and vapor lines.
3. Remove relevant ties and pipe insulation.
4. Unwrap and remove the TXV sensing bulb.
5. Remove the equalizer tube from vapor pipe. Wrap the TXV and coil panel with
a wet rag to prevent overheating while brazing. Use a shield plate to prevent
the copper pollution.
screws
TXV
BULB
removed insulation view
front view
Figure 10
WARNING:
Wrap the TXV and coil panel with a wet rag to prevent
overheating while brazing; and use a shield plate to prevent
the fire and copper pollution.
6. Disconnect the input pipe ,Wrap the TXV and coil panel with a wet rag
to prevent overheating while brazing,Use a nitrogen flow and braze all
connections while brazing. Use a shield plate to prevent the copper pollution.
7. Remove the TXV fixed screws.
8. Replace a new TXV, wrap the TXV with a wet rag or dip into water to prevent
overheating while brazing.
9. Allow tubing to cool and pressurize line sets with 150 PSI of nitrogen to check
braze connections and flow assembly for leaks. Make repairs as needed.

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10. Dry the TXV.
11. It is recommended to insulate the TXV and liquid line.
12. Connect and secure the TXV to the coil panel, Wrap a wet rag to prevent
overheating while brazing.Use a shield plate to prevent the copper pollution.
13. Clean a straight section of the vapor line in original position. Use the straps
to secure the TXV sensing bulb on top of the vapor line as picture, about 45
degrees.
14. Insulate the entire vapor line and sensing bulb. It is also recommended
to insulate the TXV and liquid line between the valve and coil to prevent
condensation in hot humid environments.
15. Replace the front coil panel and secure in place. Follow the steps in the
installation guide for vacuum requirements and system start up procedures.
16. Allow system to run for a minimum of 10 minutes in the cooling mode, charge
the system to 10degrees of subcooling, Adjust the expansion valve to achieve
9 (± 3 degrees) of superheat.
17. Allow system to run for an additional 10 minutes to verify the subcooling and
superheat readings.
shield plate
brazing
brazing
shield plate
Figure 11
Expansion Valve (TXV) Spare Parts
Cased Coil Model Number Spare Parts Material Number - Expansion Valve (TXV)
BMAC2430ANTD 8733948235
BMAC2430BNTD 8733948235
BMAC3036ANTD 8733948235
BMAC3036BNTD 8733948235
BMAC3036CNTD 8733948235
BMAC4248BNTF 8733941929
BMAC4248CNTF 8733941929
BMAC4248DNTF 8733941929
BMAC4860CNTF 8733941932
BMAC4860DNTF 8733941932
Table 4

United States and Canada
Bosch Thermotechnology Corp.
50 Wentworth Avenue
Londonderry, NH 03053
Tel: [phone]
Fax: [phone]
www.boschheatingandcooling.com
BTC 770101101 C / 03.2017