Hitachi Set Free mini-HNRQ1 Series, Service Manual

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23
INSTALLATION
Table 3.2 Piping Work Conditions
Item Marks
Allowable Piping Length
Maximum Piping
Length
(Liquid Pipe)
Between the outdoor unit and the
farthest indoor unit
a+b+c+d
RAS-3.0~3.5HNBRKQ1 ≤65 meters
RAS-4.0~5.0HNBRKQ1 ≤70 meters
RAS-6.0~6.5HNBRKQ1 ≤85 meters
RAS-7.0~12HNBRMQ1 ≤100 meters
Total liquid pipe length
a+b+c+d+L1+
L2+L3
RAS-3.0~3.5HNBRKQ1 ≤100 meters
RAS-4.0~5.0HNBRKQ1 ≤120 meters
RAS-6.0~6.5HNBRKQ1 ≤150 meters
RAS-7.0~12HNBRMQ1 ≤180 meters
Between the 1st branch pipe and the
farthest indoor unit
b+c+d ≤40 meters
Between branch pipes and connected
indoor units
L1,L2,L3,d ≤15 meters
Allowable Height
Difference
Outdoor unit is higher than indoor unit H1
RAS-3.0~6.5HNBRKQ1 ≤30 meters
RAS-7.0~12HNBRMQ1 ≤50 meters
Outdoor unit is lower than indoor unit H1
RAS-3.0~6.5HNBRKQ1 ≤30 meters
RAS-7.0~12HNBRMQ1 ≤40 meters
Height difference between indoor units H2 ≤15 meters
Others The model of branch pipe▲
RAS-3.0~6.5HNBRKQ1
RAS-7.0~12HNBRMQ1
E-102SN
Note:
Mark “▲” represent that the model of branch pipe should be same as the requirement of the table above.