Installation manual

English 8
6-5 Example of connection
(Example) With REFNET header, indoor units 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8
(Example) With REFNET joints B, indoor units 7 + 8 (Example) With REFNET header, indoor units 1 + 2 + 3 + 4 + 5 + 6
Example unit 6 : a + b + h ≤150m, 8 : a + i + k ≤150m Example unit 8 : a + i ≤150m
Individual outdoor unit system (Q8~16)
Example Refrigerant Branch using REFNET Joint
Example Refrigerant Branch using REFNET Joint and REFNET Header
Example Refrigerant Branch using REFNET Header
a
hijklmn hijklmn
1
234567
1
23456
7
8
8
bc de f
g
a
u
rs
bc
t
de f
g
p
p
H1
H1
H3
H2
H2
H1 H1
H3
H1 H1
H3
H2
H2
H2
ABCDEF
G
ABCDEF
G
Outdoor unit
Outdoor unit
First outdoor unit multi connection piping kit
REFNET Joints (A-G)
REFNET Joints (A-G)
Outdoor unit
Outdoor unit
Outdoor unit
Outdoor unit
REFNET Header REFNET Header
REFNET Joints (A • B)
REFNET Joints (A • B)
Multi-connecting outdoor unit system (Q18~)
Actual Pipe Length
Pipe length between outdoor unit (*2) and indoor units ≤150m Example unit 8 : a + b + c + d + e + f + g + p ≤150m Equivalent pipe length between outdoor unit (*2) and indoor unit. ≤175m (assume equivalent length of REFNET joint to be 0.5m, that of REFNET header to be 1m, calculation purposes.)
Difference in height between outdoor unit and indoor unit (H1). ≤50m (≤40m if the outdoor unit is below.) Difference in height between indoor units. (H2) ≤15m Difference in height between outdoor units. (H3) ≤5m Example unit 8 : b + c + d + e + f + g + p ≤40m Example unit 6 : b + h ≤40m, 8 : i + k ≤40m Example unit 8 : i ≤40m
Piping length from the first refrigerant branch kit (REFNET joint or REFNET header ) to indoor unit. ≤40m (See Note1 - Next page)
Total pipe length from outdoor unit (*2) to all and indoor units. ≤300m Actual pipe length between outdoor unit multi connection piping kit and outdoor unit. ≤10m
Equivalent length between outdoor unit multi connection piping kit and outdoor unit. ≤13m
Actual Pipe Length
How to select REFNET joint
2 set 3 set
BHFP22P100 BHFP22P151
(Example) With REFNET joints C, indoor units 3 + 4 + 5 + 6 + 7 + 8
Example of indoor units connected down-stream
Numbers of outdoor units
Outdoor unit multi connection piping kit name
Q8, 10 type Q12~22 type Q 24 type~
KHRP26A33T KHRP26A72T KHRP26A73T + KHRP26M73TP
Capacity type of outdoor unit Refrigerant branch kit name
KHRP26A22T KHRP26A33T KHRP26A72T KHRP26A73T + KHRP26M73TP
Total capacity index of indoor units
Refrigerant branch connection to be used
Connection Examples
(as connecting 8 indoor units)
Indoor unit ( 1 - 8 )
Indoor unit ( 1 - 8 ) Indoor unit ( 1 - 8 )
Indoor unit ( 1 - 8 ) Indoor unit ( 1 - 8 )
Indoor unit ( 1 - 8 )
a
au
r
s
t
i i
b
b
a
a
s
t
r
u
bcde f gh i
i
cde
f
g
h
j
k
REFNET Header
REFNET Header
1
23456
1
234 567
H2
b
rs
u
t
cd e f gh
1
234 567
8 8
cde f
g
h
1
23456
78
j
k
78
A
A
B B
(*1)“ ” shows outdoor unit multi connection piping
kit. Outdoor unit connection piping kit must be located in level.
(*2)For the multi-connecting systems, please replace
“outdoor unit” with “outdoor unit multi connection piping kit” as you read the directions.
* When multi outdoor system are installed, be sure to use the special
separately sold outdoor unit multi connection piping kit. The table at right shows how to select the proper kit.
(*1)
Outdoor unit
r ≤10m (Equivalent Length ≤13m)
s ≤10m (Equivalent Length ≤13m) t ≤10m (Equivalent Length ≤13m)
• When REFNET joint is used for the first branch from outdoor unit (REFNET joint A in above e.g.),
select from below chart according to outdoor unit capacity.
How to select REFNET header
• Select from below table according to total indoor units capacity index connected below REFNET header. (Note) 250 type indoor unit cannot be connected below the REFNET header.
Use REFNET joint (s).
How to select outdoor unit multi connection piping kit
• Required for Q18 or more capacity type of outdoor unit.
• Other REFNET joints (except for the first branch) shall be selected from below table according to
total capacity index of all the indoor units connected below the REFNET joint.
< 200
200 ≤ x< 290 290 ≤ x< 640
640 ≤ x
Total capacity index of indoor units Refrigerant branch connection to be used
KHRP26M22H (max. 4 branch) KHRP26M33H (max. 8 branch) KHRP26M72H (max. 8 branch) (* note) KHRP26M73H + KHRP26M73HP
< 200
200 ≤ x< 290 290 ≤ x< 640
640 ≤ x
(* Note) If the pipe size above the REFNET header is φ34.9 or more, KHRP26M73HP is required.
Specified outdoor unit multi connection piping kit (BHFP22P100, BHFP22P151) as an optional accessory must be used for a multi-connecting outdoor unit system. How to select (a proper kit) is according to this sheet. Make sure not to use the outdoor unit connection piping kit (BHFP22M90) or T-joints.
Between outdoor unit (*2) and indoor unit
Between outdoor unit multi connection pipint kit and outdoor unit (Only for multi-connecting systems)
Between outdoor unit and indoor unit
Between indoor unit and indoor unit
Between outdoor unit and outdoor unit
Allowable Length after the Branch
Refrigerant branch kits can only be used with R410.
Refrigerant Branch pipe kit selection
Equivalent Length
Total Extension Length Actual Pipe Length Equivalent Length
Difference in height Difference in height Difference in height
Allowable Max. Length
Allowable Hight Length
Refrigerant Piping Works (attached table)
01_EN_3P226891-13Q.fm Page 8 Thursday, December 2, 2010 10:15 AM