background image

Downslope

Upward slope

To BC controller 

To BC controller

High-pressure twinning pipe

· If high-pressure twinning pipe is installed above the base of the 

heat source unit, it should be no more than 200mm [7-7/8 in.].

200mm 
[7-7/8 in.]
max.

High-pressure
twinning pipe

To indoor unit

Heat source unit 1

Heat source unit 2

(6) Pipe connection (high-pressure side) 

· Make sure the pipes from the twinning pipe to the heat source unit are sloped downwards.

3

Field piping
(Low-pressure connecting pipe:To BC Controller)

Field piping
(Low-pressure connecting pipe:To heat source unit)

Field piping
(High-pressure connecting pipe)

1

7C

Wrap the pipe cover here.
(Keep out of contact with the adjacent sheet metal.)

3

5

4

6

· To prevent the refrigerant service valve from being damaged, do 

not let its temperature rise above 120 ˚C [248˚F]. 
Place a wet towel on the refrigerant service valve before brazing 
the pipes.

· Direct the blazing torch flame away from the adjacent cables and 

sheet metal to keep them from being damaged. 

CAUTION

(2) Connecting the twinning pipe kit 

(1) Braze the high-pressure pipe (

6

) to the refrigerant 

service valve.

(2) Screw down the low-pressure twinning pipe kit (

1

) to the 

sheet metal of the refrigerant service valve with the 
screws (

3

), and braze it to the refrigerant service valve.

(3) Braze the elbow (

5

) to the field-piping first, and then 

braze it to the low-pressure twinning pipe kit (

1

).

(4) Braze the elbow (

4

) to the low-pressure pipe in the 

middle.

Note 
1. Exercise caution not to burn the cables while brazing the 

pipes.

2. Before brazing pipes to the refrigerant service valve, place a 

wet towel on the valve to keep its temperature from rising 
above 120 ˚C [248˚F]. 

(5) Wrap the u-bend of the low-pressure twinning pipe kit 

(

1

) with the pipe cover (

7

), and tie a band (

C

) around 

it to keep it in place.

Summary of Contents for CITY MULTI CMY-Q100VBK

Page 1: ...ions or alterations Consult your dealer for repair Improper installation may result in water leakage electric shock or fire In the event of a refrigerant leak thoroughly ventilate the room If refrigerant leaks and comes in contact with an open flame toxic gases will be generated Properly install all parts according to the instructions in the Installation Manual If the wrong twinning pipe or wrong ...

Page 2: ...kage unit name BC controller Twinning pipe a b PQRY P400YSHM A PQRY P200YHM A PQRY P200YHM A High pressure Low pressure c d High pressure e High pressure Twinning pipe Kit optional parts Twinning pipe Heat Source unit 1 Twinning pipe Heat Source unit 2 Twinning pipe Heat Source unit 2 Heat Source unit 2 PQRY P450YSHM A PQRY P250YHM A PQRY P200YHM A PQRY P550YSHM A PQRY P300YHM A PQRY P250YHM A Ø28...

Page 3: ... above 120 C 248 F Place a wet towel on the refrigerant service valve before brazing the pipes Direct the blazing torch flame away from the adjacent cables and sheet metal to keep them from being damaged CAUTION 2 Connecting the twinning pipe kit 1 Braze the high pressure pipe 6 to the refrigerant service valve 2 Screw down the low pressure twinning pipe kit 1 to the sheet metal of the refrigerant...

Page 4: ...Overlap the tape as shown in the left figure so that there will be no gap in between the insulation cover or field installed insulation material field supplied pipe Heat resistant insulation material field supplied Heat resistant insulation material field supplied field supplied pipe field supplied pipe 2High pressure twinning pipe BInsulation cover Tape field supplied To be gap free To be gap fre...

Page 5: ...Related Links Model Number CMY Q100VBK CMY Q100VBK Installation Manual WT05688X01 ...

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