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3. Additional charge
3.1. When the length of the one-way pipe is less than 5m, additional refrigerant charge after vacuuming is
unnecessary.
3.2. When the length of one-way pipe is over 5m, the additional charge quantity is as follows (unit in gram):
Calculation method
Refrigerant Liquid
diameter mm
Unit amount (g/m)
Formula
Φ
6.35 30
(L-5)×30
Φ
9.53 65
(L-5)×65
R410A
Φ
12.7 90
(L-5)×90
Remark 1 The additional refrigerant charge is simply related with the liquid pipe diameter.
2 In the up formula, “L” means total length of liquid pipe(unit: m).
4. Water drainage
4.1. Gradient and Supporting
4.1.1 Keep the drainpipe sloping downwards at a gradient of at least 1/100. Keep the drainpipe as short as
possible and eliminate the air bubble.
4.1.2 The horizontal drainpipe should be short. When the pipe is too long, a prop stand must be installed to
keep the gradient of 1/100 and prevent bending. Refer to the following table for the specification of the prop
stand.
Diameter
Distance
between the prop stands
Hard PVC pipe
25~40mm
1.5~2m
4.1.3. Precautions
The diameter of drainpipe should meet the drainage requirement at least.
The drainpipe should be heat-insulated to prevent atomization.
Drainpipe should be installed before installing indoor unit. After powering on, there is some water in
water-receiver plate. Please check if the drain pump can operate correctly.
All connection should be firm.
Wipe color on PVC pipe to note connection.
Climbing, horizontal and bending conditions are prohibited.
The dimension of drainpipe can’t less than the connecting dimension of indoor drainpipe.
Heat-insulation should be done well to prevent condensation.
Indoor units with different drainage type can’t share one convergent drainpipe.
Summary of Contents for YOHC 12
Page 7: ...Part 2 Indoor units Ceiling Floor Type ...
Page 17: ...4 Service space 600mm 600mm ...
Page 20: ...6 1 3 YOKC 24 6 1 4 YOKC 30 ...
Page 21: ...6 1 5 YOKC 36 6 1 6 YOKC 48 YOKC 60 ...
Page 30: ...Discharge angle 60 FLOOR Airflow velocity Temperature ...
Page 37: ...Part 3 Outdoor Units Outdoor Units ...
Page 39: ...1 Dimensions 1 1 YOJC 12 290 315 285 530 62 590 750 110 1 2 YOJC 18 12 5 ...
Page 40: ...1 3 YOJC 24 330 62 895 860 590 141 1 4 YOJC 30 YOJC 36 ...
Page 41: ...1 5 YOJC 48 YOJC 60 ...
Page 43: ...3 Wiring diagrams 3 1 Cooling Heating 3 1 1 YOJC 12 3 1 2 YOJC 18 ...
Page 46: ...4 Field Wiring ...
Page 49: ...7 Sound levels 1m Microphone 12000btu h 18000btu h ...
Page 50: ...24000btu h 3000btu h 36000btu h 48000btu h 60000btu h ...
Page 66: ...Part 4 Installation Installation ...
Page 75: ...www johnsoncontrols com SM YOHC 12 60GB 03 07 ...