Refrigerant Piping Connection - ActronAir Cascade URC-071AS Installation Manual

7. Refrigerant Piping Connection

Safety Precautions
WARNING
• All field piping must be completed by a qualified HVAC technician and must comply with local and national
regulations.
• When the air conditioner is installed in a small room, measures must be taken to prevent the refrigerant
concentration in the room from exceeding the safety limit in the event of refrigerant leakage. If the refrigerant
leaks and its concentration exceeds its proper limit, hazards due to lack of oxygen may result.
• When installing the refrigeration system, ensure that air, dust, moisture or foreign substances do not enter
the refrigerant circuit. Contamination in the system may cause poor operating capacity, high pressure in the
refrigeration cycle, explosion, injury or product failure and may void warranty.
• Ventilate the area immediately if there is refrigerant leakage during the installation. Leaked refrigerant gas can be
toxic. Ensure there is no refrigerant leakage after completing the installation work.
Notes on Drilling Hole In Wall
You must drill a hole in the wall for the refrigerant piping,
and the signal cable that will connect the indoor and
outdoor units.
1. Determine the location of the wall hole based on the location
of the outdoor unit.
2. Using a 65mm core drill, drill a hole in the wall.
3. Place the protective wall cuff in the hole. This protects
the edges of the hole and will help seal it when you
finish the installation process.
NOTE
When drilling the wall hole, make sure to avoid wires,
plumbing, and other sensitive components.
Super Slim Four-Way Cassette
Notes On Pipe Length and Elevation
Ensure that the length of the refrigerant pipe, the number
of bends, and the drop height between the indoor and
outdoor units meets the requirements shown in Table 7.1:
Table 7.1
The Maximum Length and Drop Height Based
on Models (unit mm)
Max Length
Model
of Piping
CRE-071AS
CRE-100AS
CRE-125AS
CRE-140AS
Page 15
Min Length
of Piping
50 5
65 5
Maximum
Drop Height
25
30