Refrigerant Piping Connection; Notes On Pipe Length And Elevation - York YKKE Series Installation Manual

Refrigerant Piping Connection

Safety Precautions
WARNING
All field piping must be completed by a licensed
technician and must comply with the 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
or injury.
Ventilate the area immediately if there is
refrigerant leakage during the installation. Leaked
refrigerant gas is both toxic and flammable.
Ensure there is no refrigerant leakage after
completing the installation work.

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: m/ft.)
Type of model Capacity
(Btu/h)
12K
50Hz T1
18K-24K
Condition/R22
30K-42K
Split Type
48K-60K
50Hz Vertical 12K
Discharge, 60Hz
18K-24K
T1 condition/ R22
Split Type, Vertical
30K-60K
Discharge
<15K
15K - <24K
R410A Inverter
Split Type
24K - <36K
36K - 60K
12K
18K-30K
R410A Split Type
36K
48K-60K
18K-24K
50Hz/60Hz T3
30K
condition (outdoor
36K
unit down)
42K-60K
18K-24K
30K
50Hz/60Hz T3
Condition (outdoor 36K
unit up)
42K
48K-60K
Unit with quick
12K-18K
joint
7
Length of Maximum drop
piping height
15/49 8/26
30/98.4 10/32.8
50/164 20/65.6
50/164 25/82
15/49 8/26
30/98.4 10/32.8
30/98.4 20/65.6
25/82 10/32.8
30/98.4 20/65.6
50/164 25/82
65/213 30/98.4
15/49 8/26
25/82 15/49
30/98.4 20/65.6
50/164 25/82
35/114 10/32.8
30/98.4 15/49
30/98.4 20/65.6
50/164 25/82
25/82 15/49
30/98.4 20/65.6
30/98.4 25/82
50/164 30/98.4
50/164 35/114
5/16.4 5/16.4
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