Hitachi E-102SN3 User manual

1
ENGLISH
1
PMML0277A - rev.0 - 12/2012
INSTALLATION MANUAL FOR
MULTI-KITS
Line Branch Models:
E-102SN3, E-162SN3, E-242SN3, E-302SN3
NOTE
Hand over this installation manual to the next installation work
personnel.
1 APPLICABLE OUTDOOR UNITS
These multiple pipe connecting kits can be applied to the R410A
SET-FREE series.
2 TRANSPORTATION
Transport the product as close to the installation location as prac-
tical before unpacking.
CAUTION
Do not put any material on the product.
3 BEFORE INSTALLATION
Conrm the number of the following parts by referring to the mo-
del printed on the package before unpacking.
Do NOT put any foreign material into the parts. Check to conrm
that no foreign materials are inside the parts before installation.
Name of parts E-102SN3 E-162SN3 E-242SN3 E-302SN3
Q’ty Q’ty Q’ty Q’ty
Branch pipe for high/low
pressure gas line
1 1 1 1
Branch pipe for liquid line
1 1 1 1
Accessory
Insulation for high/low
pressure gas line
1 1 1 1
Insulation for liquid line
1 1 1 1
Reducer for high/
low pressure gas line
connection (For end of
Multi-Kit connection)
None 1 1 1
None
None None 1
None None None 1 1
Reducer for liquid line
connection (For unit
piping connection) 2 1 1 1
Tape
2 2 2 2
NOTE
If any of these parts is not contained, please contact your distributor.

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PMML0277A - rev.0 - 12/2012
INSTALLATION MANUAL FOR
MULTI-KITS
4 INSTALLATION WORK
4.1 PIPING CONNECTION SIZE
The ends of the multi-kits are nished as shown in the following
gures. Cut the end of the pipe to meet with the pipe size.
CAUTION
Piping shall be supported with adequate space. Bent pipes and
bypass piping (horizontal loop) shall also be installed in order to
absorb piping elasticity caused by temperature changes.
Model High/low pressure gas line Liquid line
E-102SN3
E-162SN3

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ENGLISH
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PMML0277A - rev.0 - 12/2012
INSTALLATION MANUAL FOR
MULTI-KITS
Model High/low pressure gas line Liquid line
E-242SN3
E-302SN3
Unit: mm, ID: Inner Diameter, OD: Outer Diameter
A To indoor unit
B To outdoor unit
C To main piping

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PMML0277A - rev.0 - 12/2012
4.2 INSTALLATION POSITION
1 Horizontal Installation
Locate the branch pipes to become the caution label uppermost on the same horizontal plane. (Inclination within +30o)
Make the straight length a minimum of 500mm after the vertical bend.
Straight length
500mm (Min.) Upward
INCORRET
Horizontally
Downward Inclination
within ±30º Inclination
(View from A)
2 Vertical Installation
Straight length of the pipe connection on the outdoor unit side is made as follows:
a. The collective pipe connection part is installed upward, the straight length must be min. 0.5m
b. The collective pipe connection part is installed downward, the straight length must be min. 0.3m.
Straight length
Min. 0.3m
Downward
Straight length
Min. 0.5m
Upward
4.3 CONNECTION PROCEDURE FOR PIPING JOINT
When connecting liquid piping for the unit with a capacity 2.0HP or smaller, and with the length of piping is 15 meters or longer, apply
the piping size of f9.52mm. Fix the connecting pipe as shown in the below gure.
Use the insulation attached to the indoor unit.Example: 36HP (The combination of 3 outdoor units)
Field-Supplied insulation
Insulation attached to indoor unit
Field-Supplied refrigerant piping
Fix this part with the attached cord band
or eld-supplied vinyl tape.
Expander for liquid line (Accessory)
Flare the pipe after inserting the are nut.
Use the are nut of the indoor unit.
Insulate this part with the attached
insulation
Brazing
Indoor unit
INSTALLATION MANUAL FOR
MULTI-KITS

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ENGLISH
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PMML0277A - rev.0 - 12/2012
4.4 PIPING CONNECTION
INSTALLATION MANUAL FOR
MULTI-KITS
1 When the branched pipe size is smaller than 22.2mm of in-
ner diameter, a mini pipe cutter (eld-supplied) as follow is
required.
(mm)
Recommended mini pipe cutter Cleavable
size
Rotating
radius
(21)
(43)
(70)
less than 70mm
Ø5 - 28 (50)
2 Use clean copper pipes without any moisture or foreign mate-
rials on inner surface of pipes. When connecting refrigerant
pipe, cut the copper pipes with a pipe cutter as shown below.
Also blow the pipes with nitrogen or air to remain no dust insi-
de the pipe. Do NOT use a saw, a grindstone or others which
causes a large amount of cutting powder.
Pipe cutter
Pipe
Burring
Connection part
3 When cutting the pipe, secure the adequate depth for brazing
as shown in the following table.
(mm)
A: Outer diameter B: Minimum
depth
B
A
Over 5, Below 8 6
Over 8, Below 12 7
Over 12, Below 16 8
Over 16, Below 25 10
Over 25, Below 35 12
Over 35, Below 45 14
• Caution for Refrigerant Piping
When installing pipe through the wall, secure a cap at the end of
the pipe. INCORRECT
CORRECT
Attach a cap
or vinyl tape.
Hole
Do NOT place the pipe directly on the ground.
Attach a cap
or vinyl tape.
CORRECT INCORRECT
Attach a cap or
vinyl tape with
rubber band.
Rain water
can enter.
INCORRECT
CORRECT
4 Make sure that all stop valves of the outdoor unit are closed
completely.
5 Blow the inside of the pipes with nitrogen gas when brazing.
DANGER
Make sure that the refrigerant leakage test should be per-
formed. Refrigerant (Fluorocarbon) for the indoor unit is
non-ammable, non-toxic and odorless. However, if the re-
frigerant is leaked and is contacted with re, toxic gas will
generate. Also, because the uorocarbon is heavier than
air, the oor surface will be lled with it, which could cause
suffocation.
6 The air tight test pressure of this product is 4.15MPa.
7 Apply the insulation supplied with this multi-kits to each
branch (liquid side and gas side) with a tape. Also apply the
eld-supplied insulation to the eld-supplied pipes.
NOTE
When polyethylene foam is applied, a thickness of 10mm for li-
quid piping and 15mm to 20mm for gas piping is recommended.
(Use the insulation with heat resistance of 100oC for gas piping.)
Wrap the insultation tape without gap between
accessory insulation and eld-supplied insulation.
Insulation tape
(Field-Supplied)
Insulation for gas and
liquid line (Accessory)
Insulation (Field-Supplied)
Do NOT leave a
gap between the
insulation.
Fix the insulation with tape
(accessory) completely
after taping temporary.
CAUTION
• Perform the insulation work when the pipe surface tempera-
ture decreases to the room temperature. If insulation work
is performed immediately after brazing, insulation may melt.
• If the ends of pipe are open to the atmosphere for a while after
performing piping work, securely put caps or plastic bags over
the pipe ends for avoiding moisture or dust.
After installation, it is recommended to keep this manual by a
customer.