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 Installation Manual

                                                                                                                    

Bosch Multi-Position Cased Coils 

 

| 15

 

Bosch Thermotechnology Corp. 

03.2017

            

 Data subject to change

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 

Summary of Contents for BMAC Series

Page 1: ...Bosch Multi Position Cased Coils Cooling and Heat Pump Compatible BMAC Series Installation Manual ...

Page 2: ...2 Bosch Multi Position Cased Coils Installation Manual 03 2017 Bosch Thermotechnology Corp Data subject to change ...

Page 3: ...s 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 infor...

Page 4: ...ion 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 fol...

Page 5: ...ilure 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 Manufa...

Page 6: ...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 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 14 368 13 330 13 343 44 1 64 8 20 0 29 4 BMAC2430BNTD 20 508 17 445 16 407 16 419 46 7 69 7 21 2 31 6 BMAC2430CNTD 2...

Page 7: ...EMALE 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 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 17 445 16 407 16 419 67 7 91 7 30 7 41 6 BMAC4...

Page 8: ...T 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 19 495 20...

Page 9: ... 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 preve...

Page 10: ...ately 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 conne...

Page 11: ...2017 Data subject to change 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 ...

Page 12: ...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 307 485 618 729 823 911 991 106...

Page 13: ...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 1...

Page 14: ...rheating 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...

Page 15: ...ion 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 ...

Page 16: ...United States and Canada Bosch Thermotechnology Corp 50 Wentworth Avenue Londonderry NH 03053 Tel 866 642 3198 Fax 954 776 5529 www boschheatingandcooling com BTC 770101101 C 03 2017 ...

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