Mitsubishi Electric SUZ-SWM40VA Technical & Service Manual page 16

MAX. REFRIGERANT PIPING LENGTH
Service ref.
SUZ-SWM40VA.TH
SUZ-SWM60VA.TH
SUZ-SWM80VA.TH
MAX. HEIGHT DIFFERENCE
ADDITIONAL REFRIGERANT CHARGE (R32: g)
Outdoor unit
Service ref.
SUZ-SWM40VA.TH
SUZ-SWM60VA.TH
SUZ-SWM80VA.TH
Pumping Down
When relocating or disposing of the outdoor unit, pump down the system following the
procedure below so that no refrigerant is released into the atmosphere.
1 Turn OFF all the supply circuit (including Indoor unit, Heater, Outdoor unit etc.)
2 Connect the gauge manifold valve to the service port of the stop valve on the gas
pipe side of the outdoor unit.
3 Fully close the stop valve on the liquid pipe side of the outdoor unit.
4 Change the settings on the indoor unit.
• Set DIP switch SW1-3 to OFF, SW2-1 to OFF, SW2-4 to ON and SW6-3 to OFF
on the indoor control board.
• Disconnect the signal inputs IN1 (room thermostat 1 input), IN4 (Demand control
input) and IN5 (Outdoor thermostat input).
OCH718A
Refrigerant piping: m
Max. Length A Max. Height difference B
30
Indoor
unit
* Max. Height
difference
B
Max. Length
precharged 7 m
1,200 0
Gas
30 12.7
A
Outdoor unit
Refrigerant piping length (one way)
10 m 15 m
0 100
Calculation: Xg=20g/m×(Refrigerant piping length(m)−10)
IN1 IN4
16
Piping size O.D: mm
Liquid
6.35
* Height difference limitations are binding
regardless of the height position at which
either indoor or outdoor is placed higher.
20 m 25 m
200 300
IN5
30 m
400