iglu Inuit 6I, Installation Manual

Page: 57 / 73

57
INSULATING THE REFRIGERANT PIPE

You must check if there is a gas leak before completing the installation process.

Use EPDM insulation that meets the following conditions.
ITEM UNIT STANDARD REMARKS
Density g/cm² 0.048~0.096 KSM 3014-01
Dimension change route by
heat
% -5 or less
Water absorption rate g/cm² 0.005 or less
Thermal conductivity kcal/m·h
·˚C
0.032 or less KSL 9016-95
Moisture transpiration
factor
ng/(m²·s·Pa) 15 or less KSM 3808-03
Moisture transpiration
grade
{g/(m²·24h)} 15 or less KSA 1013-01
Formaldehyde dispersion mg/L - KSF 3200-02
Oxygen rate % 25 or less ISO 4589-2-96

Be sure to insulate the refrigerant pipe, joints, and connections with class 'o' material.

If you insulate the pipes, the condensed water does not fall from the pipes and the capacity of the Air to Water
Heat Pump is improved.

Check if there are any insulation cracks on the bent pipe.
BRAZING THE PIPE

Make sure that there is no moisture inside the pipe.

Make sure that there are no foreign materials or impurities in the pipe.
REPLACEMENT OF NITROGEN GAS
1. Use oxygen-free nitrogen gas when brazing the pipes as shown in the picture.
2. If you do not use Nitrogen gas when brazing the pipes, oxidation may form in the pipe. It can cause
damage to the compressor and valves.
3. Adjust the flow rate of the replacement with a pressure regulator to maintain 0.05 m
3
/h or more.
4. Perform brazing of the service valve after protecting the valve.