HITACHI E-52XN3 Joint kit Instruction Manual
- June 3, 2024
- 1 by one
Table of Contents
HITACHI E-52XN3 Joint kit
NOT
Hand over this installation manual to the next installation work person.
TRANSPORTATION
Transport the product as close to the installation location as practical
before unpacking.
CAUTTON
Do not put any material on the product.
BEFORE INSTALLATION
Confirm 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 confirm that no foreign materials are inside the parts before
installation.
NOTE
If any of these parts is not contained, please contact your distri-
butor.
INSTALLATION
WORK ACAUT TION
Piping shall be supported with adequate space. Bent pipes and PIPING
CONNECTION SIZE bypass piping (horizontal loop) shall also be installed in
order to absorb piping elasticity caused by temperature changes The ends of
the multi-kits are finished as shown in the following figures. Cut the end of
the pipe to meet with the pipe size.
INSTALLATION POSITION
- Horizontal Installation Locate the branch pipes to become the caution label uppermost on the same horizontal plane. (Inclination within t30°) Make the straight length a minimum of 500mm after the vertical bend.
- Vertical Installation Straight length of the pipe connection on the outdoor unit side is made as follows: The collective pipe connection part is installed upward, the straight length must be min. 0.5m The collective pipe connection part is installed downward, the straight length must be min. 0.3m.
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 pip ing size
of 49.52mm. Fix the connecting pipe as shown in the below figure. Use the
insulation attached to the indoor unit.Example: 36HP (The combination of 3
outdoor units)
PIPING CONNECTIONN
When the branched pipe size is smaller than 22.2mm of in- Do NOT place the
pipe directly on the ground. ner diameter, a mini pipe cutter (field-supplied)
as follow is required.
Use clean copper pipes without any moisture or foreign ma- terials 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.
When cutting the pipe, secure the adequate depth for brazing as shown in the
followina table.
When installing pipe through the wall, secure a cap at the end of the pipe.
Do NOT place the pipe directly on the ground.
Make sure that all stop valves of the outdoor unit are closed completely. Blow the inside of the pipes with nitrogen gas when brazing.
DANGER
Make sure that the refrigerant leakage test should. formed. Refrigerant
(Fluorocarbon) for the indoor non-flammable, non-toxic and odorless. However,
if frigerant is leaked and is contacted with fire, toxic generate. Also,
because the fluorocarbon is heavi- air, the floor surface will be filled with
it, which coulo suffocation
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 100°C for gas piping.)
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 afer 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.
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