Specifications

The two-pipe zoned system designed for Heat
Pump Operation
The CITY MULTI S series (for small applications) and Y series (for large applications) make use of a two-pipe
refrigerant system, which allows for system changeover from cooling to heating, ensuring that a constant indoor
climate is maintained in all zones. The compact outdoor unit utilizes R410A refrigerant and an INVERTER-driven
compressor to use energy effectively.
With a wide line-up of indoor units in connection with a flexible piping system, the CITY MULTI series can be
configured for all applications. Up to 12 (S series) or 50 (Y series) indoor units can be connected with up to 130%
connected capacity to maximize engineer's design options. This feature allows easy air conditioning in each area
with convenient individual controllers.
S (Heat Pump) series
Y (Heat Pump) series
Cooling or Heating
Small Offices (S series) Large Offices (Y series)
System Pipe Lengths
Outdoor unit
Indoor unit
Between indoor units
top-bottom differential
15m [49ft]
Between indoor units
top-bottom differential
15m [49ft]
Furthest piping length
190m [623ft] (equivalent length)
(actual length 165m [541ft])
Furthest piping length
190m [623ft] (equivalent length)
(actual length 165m [541ft])
Header
Joint
Outdoor unit
[8-50HP (Y series)]
[8-36HP (High COP Y series)]
Top-bottom differential
50m [164ft] *1 *2
Top-bottom differential
50m [164ft] *1 *2
*1When the outdoor unit is installed below the indoor unit, top-bottom differential is 20m [65ft]. *1 When the outdoor unit is installed below the indoor unit, top-bottom differential is 40m [131 ft].
*2 Depending on the model and installation conditions, top-bottom differential 90m [295ft] (o/u
above) and 60m [196ft] (o/u below) is available. For more detailed information, please contact
your nearest sales office or distributor.
Refrigerant Piping Lengths
Total length
Maximum allowable length
Farthest indoor from first branch
Vertical differentials between units
Indoor/outdoor (outdoor higher)
Indoor/outdoor (outdoor lower)
Indoor/indoor
Maximum meters [Feet]
120 [393]
80 [262]
30 [98]
Maximum meters [Feet]
50 [164]
20 [65]
12 [39]
Refrigerant Piping Lengths
Total length
Maximum allowable length
Farthest indoor from first branch
Vertical differentials between units
Indoor/outdoor (outdoor higher)
Indoor/outdoor (outdoor lower)
Indoor/indoor
Maximum meters [Feet]
1,000 [3,280]
165 (190equivalent)
[541(623)]
40 [131]
Maximum meters [Feet]
50 [164]*1
40 [131]*1
15 [49]
Outdoor unit
Indoor unit
Between indoor units
top-bottom differential
15m [49ft]
Between indoor units
top-bottom differential
12m [39ft]
Furthest piping length
190m [623f
Furthest piping length
80m [262ft]
[4-6HP (S series)]
Top-bottom differential
50m [164ft]
*1
Top-bottom differential
50m [164ft]
*1
Between indoor units
top-bottom
differential 15m [49ft]
Between indoor unit and
BC controller top-
bottom differential 15m [49ft]
Top-bottom differentialt]
Furthest piping length
190m [623ft] (equivalent length)
(actual length 165m [541ft])
Indoor unit
BC controller
PUMY-P VHMB(-BS)
PUMY-P YHMB(-BS)
S series
PUHY-P YHM-A(-BS)
PUHY-P YSHM-A(-BS)
PUHY-EP YHM-A(-BS)
PUHY-EP YSHM-A(1)(-BS)
Y series
Outdoor unit
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Outdoor unit
Equipment room
Office
compartment
Office
Office
Meeting room
BC controller
Outdoor unit
Refrigerant piping: 2-pipe type
Meeting room
Cooling
Cooling
Cooling
Heating
Heating
Heating
The world’s first two-pipe system that
Simultaneously Cools and Heats
CITY MULTI R2 series offers the ultimate in freedom and flexibility. Cool one zone while heating another. Our
exclusive BC controller makes two-pipe simultaneous cooling and heating possible. The BC controller is the
technological heart of the CITY MULTI R2 series. It houses a liquid and gas separator, allowing the outdoor unit to
deliver a mixture of hot gas for heating and liquid for cooling, all through the same pipe.
This innovation results in virtually no energy wasted by being expelled outdoors. Depending on capacity, up to 50
indoor units can be connected with up to 150% connected capacity
R2 (Heat Recovery) series
Simultaneous Cooling and Heating
Installation image (R2 series)
System Pipe Lengths
Between indoor units
top-bottom differential
15m [49ft]
Furthest piping length
190m [623ft] (equivalent length)
(actual length 165m [541ft])
Top-bottom differential
50m [164ft] *1 *2
Refrigerant Piping Lengths
Total length
(P600,P650 models only: Refer to the Data book for other models.)
Maximum allowable length
Maximum length between outdoor
and single/main BC controller
*Maximum total length is dependent upon the distance
between the outdoor unit and the single/main BC
Controller.
Maximum length between single/main
BC controller and indoor
Vertical differentials between units
Indoor/outdoor (outdoor higher)
Indoor/outdoor (outdoor lower)
Indoor/BC controller (single/main)
*Maximum length between single/main BC controller
and indoor is dependent upon the vertical differential
between the single/main BC controller and the indoor
unit.
Indoor/indoor
Main BC Controller/Sub BC Controller
Maximum meters [Feet]
550-800 [1,804-2,624]
165 (190equivalent)
[541(623)]
110 [360]
40-60 [131-196]
Maximum meters [Feet]
50 [164]*2
40 [131]*2
15 [49]
15 [49]
15 [49]
Between indoor units
top-bottom differential
15m [49ft]
Furthest piping length
190m [623f
Top-bottom differential
50m [164ft]
*1
*1 When the outdoor unit is installed below the indoor unit, top-bottom differential is 40m [131ft].
*2 Depending on the model and installation conditions, top-bottom differential 90m [295ft] (o/u above) and 60m [196ft] (o/u below) is available. For more detailed information, please contact your nearest sales office or
distributor.
[8-32HP (R2 series)]
[8-24HP (High COP R2 series)]
Outdoor unit
Between indoor units
top-bottom
differential 15m [49ft]differential 15m [49ft]
Between indoor units
top-bottom
differential 15m [49ft]
Between indoor unit and
BC controller top-
bottom differential 15m [49ft]
Between indoor unit and
BC controller top-
bottom differential 15m [49ft]
Between indoor unit
and BC controller
top-bottom differential 15m [49ft]
Top-bottom differentialt]
Furthest piping length
190m [623ft] (equivalent length)
(actual length 165m [541ft])
Furthest piping length
190m [623ft] (equivalent length)
(actual length 165m [541ft])
Indoor unitIndoor unit
BC controllerBC controller
Top-bottom differential
50m [164ft]
*1 *2
PURY-P YHM-A(-BS)
PURY-P YSHM-A(-BS)
PURY-EP YHM-A(-BS)
PURY-EP YSHM-A(1)(-BS)
R2 series
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Outdoor Unit