Mitsubishi SRK19CNS-S, Technical Manual

Page: 27 / 70

- -
'14•SRK-T-164
– 36 –
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.
Connection of refrigerant pipings
2/N 3
2/N 1/L
1/L
Outdoor unit
breaker
Safety
Earth
leakage
20A
circuit
breaker
Earth
Power supply
When wire length exceeds
30m, use 2.0-mm wires.
1 2/N 3 Indoor unit Outdoor unit
breaker
Safety
Earth
leakage
20A
circuit
breaker
Earth
Power supply
When wire length exceeds
SRC21CNS-S SRC26CNS-S
30m, use 2.0-mm wires.
1 2/N L N 3
1 2 3
Indoor unit
(POWER SUPPLY CODE)
CENELEC code for cables requiring fields cables.
H05RNR3G2.5
A
90
±0.5°
Preparation
Connection of refrigerant piping
Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them.
Connect the pipes on both liquid and gas sides.
Tighten the nuts to the following torque.
N·m (kgf·m)
Liquid side ( F 6.35) 14.0 ~ 18.0 (1.4~1.8)
Gas side ( F 9.52) 34.0 ~ 42.0 (3.4~4.2)
( F 12.7) 49.0 ~ 61.0 (4.9~6.1)
( F 15.88)
68.0 ~ 82.0 (6.8~8.2)
Flaring work v
CAUTION
Do not apply excess torque to the v
flared nuts.
Otherwise, the flared nuts may crack
depending on the conditions and
refrigerant leak may occur.
Measurement B
Copper pipe
Flaring block
Copper pipe
diameter
Measurement B (mm)
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.
Clutch type flare
tool for R410A
Conventional (R22) flare tool
Clutch type Wing nut type
F 6.35 0.0~0.5 1.0~1.5 1.5~2.0
F 9.52 0.0~0.5 1.0~1.5 1.5~2.0
F 12.7 0.0~0.5 1.0~1.5 2.0~2.5
F 15.88 0.0~0.5 1.0~1.5 2.0~2.5
Indoor Outdoor
Liquid side
Gas side
(Do not turn)
Liquid side
Gas side
Remove the flared nuts.
(on both liquid and gas sides)
Remove the flared nuts.
(on both liquid and gas sides)
Install the removed flared nuts to the pipes to be
connected, then flare the pipes.
CAUTION
Do not apply v
refrigerating
machine oil to the
flared surface.
r o o d t u O r o o d n I
(Do not turn)
e v o m e R e v o m e R
s s e r P s s e r P
Dimension A
Liquid side : ø6.35: 9.1
Gas side ø9.52: 13.2
ø12.7: 16.6
ø15.88: 19.7
(Unit : mm)
RMA012A076A_En.indb 36 22-Jan-14 09:00:41