York YKKE Series, Installation Manual

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Refrigerant Piping
Connection
Refrigerant Piping Connection
7
Safety Precautions
WARNING
s All field piping must be completed by a licensed
technician and must comply with the local and
national regulations.
s 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.
s 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.
s 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) Length of
piping
Maximum drop
height
50Hz T1
Condition/R22
Split Type
12K 15/49 8/26
18K-24K 30/98.4 10/32.8
30K-42K 50/164 20/65.6
48K-60K 50/164 25/82
50Hz Vertical
Discharge, 60Hz
T1 condition/ R22
Split Type, Vertical
Discharge
12K 15/49 8/26
18K-24K 30/98.4 10/32.8
30K-60K 30/98.4 20/65.6
R410A Inverter
Split Type
<15K 25/82 10/32.8
t
15K - <24K 30/98.4 20/65.6
t
24K - <36K 50/164 25/82
t
36K -
d
60K 65/213 30/98.4
R410A Split Type
12K 15/49 8/26
18K-30K 25/82 15/49
36K 30/98.4 20/65.6
48K-60K 50/164 25/82
50Hz/60Hz T3
condition (outdoor
unit down)
18K-24K 35/114 10/32.8
30K 30/98.4 15/49
36K 30/98.4 20/65.6
42K-60K 50/164 25/82
50Hz/60Hz T3
Condition (outdoor
unit up)
18K-24K 25/82 15/49
30K 30/98.4 20/65.6
36K 30/98.4 25/82
42K 50/164 30/98.4
48K-60K 50/164 35/114
Unit with quick
joint
12K-18K 5/16.4 5/16.4