After Installation - Mitsubishi Heavy Industries SRK63ZR-S Technical Manual

• Use Polychloroprene sheathed flexible cord (code designation 60245 IEC57, IEC60335-2-40) with cross-
sectional area of 2.0 or 2.5 mm for power cable of outdoor unit.
2
(POWER CABLE)
CENELEC code for cables requiring fields cables.
H05RNR3G2.0 [MODEL 63(21)]
H05RNR3G2.5 [MODEL 71(24), 80(28)]
5. UTILIZATION OF EXISTING PIPING
Check whether an existing pipe system is reusable or not by using the following flow chart.
START
Are an outdoor unit and an indoor unit connected to the NO
existing pipe system to reuse?
YES
NO
Are the existing units our products?
YES
YES
Does the existing pipe system to reuse satisfy all of the following?
(1) The pipe length is 30m or less.
(2) The pipe size conforms to the table of pipe size restrictions.
NO
(3) The elevation difference between the indoor and outdoor units
conforms to the following restrictions.
Where the outdoor unit is above: 20m or less
Where the outdoor unit is below: 20m or less
YES
YES
Is the unit to install in the existing pipe system a
twin-triple-double-twin model?
NO
YES
Is the existing pipe system to reuse free of corrosion, flaws or dents?
NO
Is the existing pipe system to reuse free of gas leaks?
(Check whether refrigerant charge was required frequently for
the system before)
NO
Are there any branch pipes with no indoor unit connected?
NO
Are heat insulation materials of the existing pipe system to
reuse free of peel-offs or deterioration?
(Heat insulation is necessary for both gas and liquid pipes)
NO
Are not there any loose pipe supports?
No loose pipe supports Some loose pipe supports
The existing pipe system is not reusable.
The existing pipe system is reusable.
Install a new pipe system.
INSTALLATION TEST CHECK
POINTS
Check the following points again after completion of the
installation, and before turning on the power. Conduct a test run
again and ensure that the unit operates properly.
Explain to the customer how to use the unit and how to take care
of the unit following the instruction manual.
Which of the following refrigeration oils
does the existing unit use? NO Make an inquiry Can not Use
Suniso, MS, Barrel Freeze, HAB, Freol,
for reusability.
ether oil, ester oil
Can Use
※ Check with the flow chart developed for a case
where an existing pipe system is reused for a
twin-triple-double-twin model published as a
technical data sheet.
Change is impossible.
Change the branching pipe to a specified type.
Change
Repair is impossible.
Repair the damaged parts.
Repair
Air tightness is impossible.
Check the pipe system for air tightness on the site.
Air tightness is OK
Remove is impossible.
Remove those branches.
Remove
Repair is impossible.
Repair the damaged parts.
Repair
Repair the damaged parts.
Repair

After installation

Power cables and connecting wires are securely fixed to the terminal block.
The power source voltage is correct as the rating.
The drain hose is fixed securely.
Service valve is fully open.
No gas leaks from the joints of the service valve.
instructions or the construction instructions of the indoor unit.
• Switchgear or Circuit breaker capacity which is calculated from maximum over current should be chosen along the
regulations in each country.
• The cable specifications are based on the assumption that a metal or plastic conduit is used with no more than three cables
contained in a conduit and a voltage drop is 2%. For an installation falling outside of these conditions, follow the internal
cabling regulations. Adapt it to the regulation in effect in each country.
<Table of pipe size restrictions>
◎: Standard pipe size ○: Usable △: Restricted to shorter pipe length limits
Model 63(21)
Additional charge volume per meter of pipe 20g/m
Liquid pipe ø6.35
Gas pipe ø12.7
◎
Pipe size Usability
Maximum one-way pipe length 30
Length covered without additional charge 15
Formula to calculate additional charge volume
Additional charge volume (g) =
{Main pipe length (m) - Length covered without additional
charge shown in the table (m)} X Additional charge volume
per meter of pipe shown in the table (g/m)
<Where the existing unit can be run for a cooling operation.>
WARNING
Carry out the following steps with the excising unit (in the order of (1), (2), (3) and (4))
(1) Run the unit for 30 minutes for a cooling operation.
(2) Stop the indoor fan and run the unit for 3 minutes for a cooling operation (returning liquid)
(3) Close the liquid side service valve of the outdoor unit and pump down (refrigerant recovery)
(4) Blow with nitrogen gas. ※ If discolored refrigeration oil or any foreign matters is discharged by
the blow, wash the pipe system or install a new pipe system.
• For the flare nut, do not use the old one, but use the one supplied with the outdoor unit.
Process a flare to the dimensions specified for R410A.
<Where the existing unit cannot be run for a cooling operation.>
Wash the pipe system or install a new pipe system.
• If you choose to wash the pipe system, contact our distributor in the area.
The pipe joints for indoor and outdoor pipes have been insulated.
The reverse flow check cap is attached.
The cover of the pipe cover (A) faces downward to prevent rain from entering.
Gaps are properly sealed between the pipe covers (A) (B) and the wall surface / pipes.
The screw of the side cover is tightened securely.
Model 71(24), 80(28)
• Consult with our distributor
60g/m 25g/m 60g/m in the area, if you need to
ø9.52 ø6.35 ø9.52
recover refrigerant and
ø12.7 ø15.88 ø15.88
charge it again.
△ ◎ △
• Any combinations of pipe
10 30 12
sizes not listed in the table
5 15 6
are not usable.
※ If you obtain a negative figure as a result of calculation, no additional
refrigerant needs to be charged.
Example) When an SRC63 is installed in a 10m long existing pipe
system (liquid 9.52, gas 12.7), the quantity of refrigerant to
ø ø
charge additionally should be (10m-5m) x 60g/m = 300g.