Installation Of Outdoor Unit; Connection Of Refrigerant Pipings - Mitsubishi Heavy Industries SRK18YLV-S1 Technical Manual

Installation of outdoor unit

① Make sure that the unit is stable in installation. Fix the
unit to stable base.
② When installing the unit at a higher place or where it
could be toppled by strong winds, secure the unit firmly
with foundation bolts, wire, etc.
③ Perfrom wiring, making wire terminal numbers conform
to terminal numbers of indoor unit terminal block.
④ Earth lead wire shall be longer than the other lead wires
for the electrical safety in case of the slipping out of the
cord from the anchorage.
Connect using ground screw located near mark.
(POWER CABLE)
CENELEC code for cables requiring fields cables.
H05RNR3G1.5

Connection of refrigerant pipings

Preparation
Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them.
① Indoor unit side
(Do not
turn)
Remove
• Remove the flared nuts.
(on both liquid and gas sides)
• Flaring work
Measurement B
Flaring block
Copper pipe
Copper pipe diameter
Clutch type flare tool for
R410A
ø6.35 0.0 ~ 0.5
ø12.7 0.0 ~ 0.5
Connection of refrigerant piping
① Indoor unit side
• Connect firmly gas and liquid side
pipings by Torque wrench.
Spanner
for fixing
the piping)
Torque
wrench
• Specified torquing value:
Liquid side (ø6.35) : 14~18N·m (1.4~1.8kgf·m)
Gas side (ø12.7) : 49~62N·m (4.9~6.2kgf·m)
• Always use a Torque wrench and back up spanner to tighten the flare nut.
② Outdoor unit side
Press
Remove
• Remove the flared nuts.
(on both liquid and gas
sides)
Measurement B (mm)
Conventional (R22) flare tool
Clutch type Wing nut type
1.0 ~ 1.5 1.5 ~ 2.0
1.0 ~ 1.5 2.0 ~ 2.5
Outdoor unit
Safety
breaker
16A
Earth
Earth
leakage
circuit
breaker
Power
Indoor unit
source
Dimension A
Liquid side
(ø6.35): 9.0 dia
Gas side
(ø12.7): 16.2 dia
• Install the removed flared nuts to the pipes to
be connected, then flare the pipes.
Use a flare tool designed for R410A or a conventional flare tool.
Please note that measurement B (protrusion from the flaring
block) will vary depending on the type of a flare tool in use.
If a conventional flare tool is used, please use a copper pipe
gauge or a similar instrument to check protrusion so that you can
keep measurement B to a correct value.
② Outdoor unit side
• Connect firmly gas and liquid side
pipings by Torque wrench.
• Specified torquing value:
Liquid side (ø6.35) : 14~18N·m (1.4~1.8kgf·m)
Gas side (ø12.7) : 49~62N·m (4.9~6.2kgf·m)
• Use one more spanner to fix the valve.

- -
'16 • SRK-T-192
When wire length exceeds
30m, 2.0-mm wires.
N
CAUTION
Do not apply refrigerating
machine oil to the flared
surface.