Checking Before Test Run; Test Run - Hitachi FSG1 Series Technical Catalogue

17

TEST RUN

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When installation is completed, perform test run according
to the following procedure, and hand over the system to the
customer. Perform test run regarding indoor units one by
one in order, and confirm that the electrical wiring and the
refrigerant piping are correctly connected.
Start the indoor units one by one in order to confirm that
they are correctly numbered.
Test run should be performed according to the "17.2 Test
Run Procedure" on next page

17.1 CHECKING BEFORE TEST RUN

1. Confirm that the gas line stop valve and the liquid line
stop valve are fully open.
2. Confirm that the leakage of the refrigerant does not exist.
The flare nuts are sometimes loosened by vibration
during transportation.
3. Check that the refrigerant piping and the electrical wiring
conform to the same system, and check that the dip
switch (DSW1) setting of unit number for the indoor units
apply to the system.
4. Confirm that the dip switch setting on the printed circuit
board of the indoor units and the outdoor units are
correct. Especially, pay attention to setting of lift between
indoor units and outdoor unit. Refer to the chapter "15.
ELECTRICAL WIRING".
5. Check to ensure that switch on the main power source
has been ON for more than 12 hours, to warm the
compressor oil by the oil heater.
6. Check whether or not the electrical wiring of the indoor
units and the outdoor units are connected as shown in
the chapter "15. ELECTRICAL WIRING".
7. Check to ensure that each wire, L1, L2, L3 and N is
correctly connected at the power source.
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WARNING:
– Do not operate the system until all the check points
have been cleared.
a. Check to ensure that the electrical resistance is
more than 1 M9, by measuring the resistance
between ground and the terminal of the electrical
parts. If not, do not operate the system until the
electrical leakage is found and repaired. Do not
impress the voltage on the terminals for
transmission 1 and 2.
b. Check to ensure that the stop valves of the
outdoor unit are fully opened, and then start the
system.
c. Check to ensure that the switch on the main
power source has been ON for more than 12
hours, to warm the compressor oil by the oil
heater
– Pay attention to the following items while the system is
running.
a. Do not touch any of the parts by hand at the
discharge gas side, since the compressor
chamber and the pipes at the discharge side are
heated higher than 90°C.
b. DO NOT PUSH THE BUTTON OF THE
MAGNETIC SWITCH(ES), it will cause a serious
accident.
– Do not touch any electrical components for more than
three minutes after turning OFF the main switch.
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NOTE:
1. Confirm that field-supplied electrical components
(main switch fuse, fuse-free breaker, earthleakage
breakers, wires, conduit connectors and wire
terminals) have been properly selected according to
the electrical data given in the Technical Catalog of
the unit and ensure that the components comply with
national and local codes.
2. Use shielded wires for field wiring to protect noise
obstacle. (Length of shielded wire shall be less than
1000m, and size of shielded wire shall comply with
local codes.)
3. Check to ensure that the terminal for power source
wiring (terminals "L1" to "L1" and "N" to "N" of each
terminal board: AC380-415V terminals "R" to "R"
and "T" to "T" of each terminals board: AC220V) and
intermediate wiring (Operating Line : terminals of
each terminal board : DC12V) between the indoor
unit and the outdoor unit coincide correctly. If not,
some component will be damaged.