Daikin 3MXM40A2V1B9 Installer's Reference Manual page 16

3 | Specific installer safety instructions
Installer reference guide
16
DANGER: RISK OF BURNING/SCALDING
DANGER: RISK OF ELECTROCUTION
Piping installation (see
CAUTION
Piping and joints of a split system shall be made with permanent joints when inside
an occupied space except joints directly connecting the piping to the indoor units.
CAUTION
▪
No brazing or welding on site for units with R32 refrigerant charge during
shipment.
▪
During installation of the refrigeration system, joining of parts with at least one
part charged shall be performed taking into account the following requirements:
inside occupied spaces non-permanent joints are NOT allowed for R32 refrigerant
except for site made joints directly connecting the indoor unit to piping. Site
made joints directly connecting piping to indoor units shall be of non-permanent
type.
CAUTION
Do NOT connect the embedded branch piping and the outdoor unit when only
carrying out piping work without connecting the indoor unit in order to add another
indoor unit later.
WARNING
Connect the refrigerant piping securely before running the compressor. If the
refrigerant piping is NOT connected and the stop valve is open when the compressor
is run, air will be sucked in. This will cause abnormal pressure in the refrigeration
cycle, which may result in equipment damage and even injury.
CAUTION
▪
Incomplete flaring may cause refrigerant gas leakage.
▪
Do NOT re-use flares. Use new flares to prevent refrigerant gas leakage.
▪
Use flare nuts that are included with the unit. Using different flare nuts may
cause refrigerant gas leakage.
CAUTION
Do NOT open the valves before flaring is complete. This would cause refrigerant gas
leakage.
DANGER: RISK OF EXPLOSION
Do NOT open the stop valves before the vacuum drying is finished.
Charging refrigerant (see
WARNING: MILDLY FLAMMABLE MATERIAL
The refrigerant inside this unit is mildly flammable.
4
"7 Piping installation" [
"8 Charging refrigerant" [
32])
4
44])
2MXM-A9, 3MXM-A9, 4MXM-A9, 5MXM-A9
4P600463-7G – 2022.09
R32 Split series