Hitachi EV-1.5N Installations- Und Betriebshandbuch Seite 13

Expansion Valve Kit EV-.5N
Installation & Operation Manual
3 Refrigerant piping work
– Connect the expansion valve kit to the liquid pipe according to the arrow direction on the expansion valve kit (refer to the item
2.5.2).
– Regarding refrigerant piping work, refer to "Installation & Maintenance Work" or "Technical Catalog" of the indoor unit and the
outdoor unit.
– The elevation difference between the indoor unit and the expansion valve kit is within 2m.
3.1 Refrigerant piping thickness
Refer to the pipe diameter in the table when connecting to the indoor unit.
3.2 Refrigerant piping length
– Refer to the outdoor unit "Installation & Maintenance Manual" for other conditions.
– Branch pipe selection and branch pipe work procedure should be followed by "Installation & Maintenance Manual" or
"Technical Catalog".
Example: Combined with Set-Free FSN(1) and FXN
Piping System
Piping Size from
Expansion Valve to I.U.: A, B
Piping Length from
Expansion Valve to I.U.: A, B
Piping Size from
Expansion Valve Kit to Multi-kit
Piping Length from
Multi-kit to I.U. (Liquid Pipe): C, D, E
(*) If the liquid piping length is longer than 15 m, use
reducer (field-supplied) at this time. (In this case the liquid piping length should be within 30 m).
Page 
Indoor unit capacity
1.0, 1.5HP
FSN(1)
Outdoor unit
Liquid
Gas
9.53 pipe between the expansion valve kit and the multi-kit. Also use a
Ø
PMML083A - 07/2008
Liquid pipe size (Ø mm)
9.53
FXN
Expansion valve kit
Multi-kit
Indoor unit
Liquid 9.53
Ø
3 to 5m
Liquid 6.35 (*)
Ø
Within 15m (*)
Expansion valve kit
Multi-kit
CH unit
Outdoor unit
High pressure gas line
Low pressure gas line
Liquid line
Indoor unit