Mitsubishi Electric Y Series Manual page 69

WR2
Simultaneous Cooling and Heating
• Features ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙
• Specifications PQRY-P Y(S)LM-A1∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙
• Optional parts ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙
• BC controllers ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙
• Technologies and functions
Advanced water heat source unit with the benefits of the
R2-Series
The CITY MULTI WR2-Series provides all of the advantages of the R2-Series with the added benefits of a water heat
source system, making it suitable for a wider range of applications in high-rise buildings, cold climates, coastal areas,
etc.
Not only does it recover heat from the indoor units along the same 2-pipe refrigerant circuit, it also recovers heat via the
water circuit between heat source units, making it a very economical system.
• Installation image (WR2-Series)
Office area
Cooling
Meeting room
Heating
Meeting room
Heating
• System pipe lengths
[P200-P900]
Refrigerant piping lengths
Total length
Maximum allowable length
Maximum length between heat source 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/ heat source (heat source higher)
Indoor/ heat source (heat source lower)
Indoor/BC controller (single/main)
Indoor/indoor
Main BC controller/Sub BC controller
*1 When the heat source unit is installed below the indoor unit, top-bottom differential is 40m [131ft].
*2 Details refer to the DATA BOOK.
*3 Farthest Indoor from BC controller can exceed 40m [131ft.] till 60m [197ft.] if no Indoor sized P200, P250 connected.
Details refer to the DATA BOOK.
*4 Distance of Indoor sized P200, P250 from BC must be less than 10m [32 ft.], if any.
*5 Distance of Indoor sized P200, P250 from indoor unit must be less than 20m [65 ft.], if any.
*6 Distance between BC (Main) and BC (Sub) must be less than 10m [32 ft.], if two BC (Sub) are installed or Indoor sized P200 and/or P250 is connected.
-Series
Heat recovery
∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙P.162
Dual
BC controller
Office area
Heat source unit
Cooling
Director's room
Maximum meters [Feet]
550-750 [1,804-2,460]
165 (190 equivalent)
[541 (623)]
110 [360]*2
40 [131]*3
Maximum meters [Feet]
50 [164]
40 [131]
15 [49]*4
30 [98]*5
15 [49]*6
P.70 - P.73
P.82 - P.89
P.90
P.101 - P.111
• System example
Water
Heat
piping
source
unit
*WR2-Series systems require the use of BC controllers.
• Double heat recovery (WR2)
Heat source unit
Heat recovery
Heating
Heating
Cooling
Water
circuit
Between indoor unit and Between indoor unit and
BC controller top- BC controller top-
bottom differential bottom differential
15m (10m) 15m (10m)
[49ft (32ft)] *4 [49ft (32ft)] *4
Top-bottom Top-bottom
differentrial differentrial
50m [164ft] *1 50m [164ft] *1
Between indoor unit Between indoor unit
and BC controller and BC controller
top-bottom differential 15m (10m) top-bottom differential 15m (10m)
[49ft (32ft)] *4 [49ft (32ft)] *4
BC controller (required)*
Indoor units
BC controller
Heat recovery
Indoor units
Heat recovery
Refrigerant circuit
Maximum length Maximum length
between heat source between heat source
and single/main and single/main
BC controller BC controller
110m [360ft] *2 110m [360ft] *2
Heat source unit Heat source unit
Furthest piping length Furthest piping length
190m [623ft] 190m [623ft]
(equivalent length) (equivalent length)
(actual length 165m (actual length 165m
[541ft]) [541ft])
BC BC
controller controller
Between indoor units Between indoor units
top-bottom top-bottom
differential 30m (20m) differential 30m (20m)
Indoor unit Indoor unit
[98ft (65ft)] *5 [98ft (65ft)] *5
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