iglu Inuit 6I, Installation Manual

Page: 56 / 73

56
REFRIGERANT PIPING WORK

Tighten the nuts to the specified torques. If overtightened, the nuts could be broken so refrigerant may leak.

Protect or enclose refrigerant tubing to avoid mechanical damage.

Keep the piping length at a minimum to minimize the additional refrigerant charge due to piping extension.

When connecting the pipes, make sure that surrounding objects do not interfere with or contact them to prevent
refrigerant leakage due to physical damage.

Make sure that the spaces where the refrigerant pipes are installed comply with national gas regulations.

Be sure to perform works such as additional refrigerant charging and pipe welding under the conditions of good
ventilation.

Be sure to perform welding and piping works for mechanical connections under the conditions that the refrigerant
does not circulate.

When reconnecting the pipes, make sure to perform flared jointing newly to prevent refrigerant leakage.

When working on the refrigerant pipes and the flexible refrigerant connectors, be careful that they are not damaged
physically by surrounding objects.

For installation with handling the R-32 refrigerant, use the special tools for the R-32 refrigerant (manifold gauge,
vacuum pump, charging hose, etc.).

During tests never pressurize the appliances with a pressure higher than the maximum allowable pressure (as
indicated on the nameplate of the unit).

Never directly touch any accidental leaking refrigerant. This could result in severe wounds caused by frostbite.

Never install a dryer in this unit to guarantee its lifetime.

If you need a pipe longer than specified in piping codes and standards, you must add refrigerant to the pipe.
Otherwise, the indoor unit may freeze.

While removing the burrs, put the pipe face down to make sure that the burrs do not get into the pipe.
SELECTING THE INSULATOR OF THE REFRIGERANT PIPE

According to pipes size, insulate pipes on the gas and liquid side by selecting appropriate insulations.

Standard conditions are under a temperature of 30 °C and a humidity of 85 %. If the units are installed in extreme
weather conditions, select the insulator in the table below.
Pipe type Pipe diameter (mm)
Thickness of insulator
Remarks
Normal (under 30C,
85%)
High humidity (over
30C, 85%)
EPDM, NBR
Liquid ø6.35~ø19.05 9 9 The material shall
have heat resistance
over 120 °C.
ø12.70~ø19.05 13 13
Gas ø6.35 13 19
ø9.52 19 25
ø12.70
ø15.88
ø19.05

Install the insulation not to get wider and use the adhesives on the connection part of it to prevent moisture from
entering.

Wind the refrigerant pipe with insulation tape if it is exposed to outside sunlight.

Install the refrigerant pipe respecting that the insulation does not get thinner on the bent part or hanger of the
pipe.