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Panasonic Cs Ksxxnb4x Cz 18bt1u Technical Service Manual

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Page 21

Outdoor UnitCU-KS18NKUA
Control PCB
Control Circuit Fuse  ControlsPart No.
Microprocessor
250V 25A CB-CU-KS18NKUA
DATA SUBJECT TO CHANGE WITHOUT NOTICE. Pints (cc)
 
WHT - BLU :
BLU - RED : RED - WHT :
77.5
77.5 77.5
 
Micro F
VAC
 External FinishAcrylic baked-on enamel finishFV50S ... 0.74 (350)
-
- Internal Controller
Yes
Aluminum Plate Fin / Copper Tube
2
21.2
 Face Area
ft
2 (m2)5.49 (0.510)  Coil
Rows
Fins per inch Heat Exchanger Coil 
SIC-67FV-F460-1 ... 1  
Compressor Oil ...  Amount
8
50 820...

Page 22

2-3.  Other Component Specifications
 
Indoor Unit CS-KS12NB41 & CZ-18BT1U
  CS-KS18NB4UW & CZ-18BT1U
Outdoor Unit CU-KS18NKU
  CU-KS12NK1A   CU-KS18NKUA
0
32 50 68 86 104 122 140 158 176 194
(0) (10) (20) (30) (40) (50) (60) (70) (80) (90) 40 60 80 100 120 140 160 180 200
20
50 1
0 2 3 4 5
6
7
8
9 10
59 68 77 86 95 104
(10) (15) (20) (25) (30) (35) (40)
• Indoor air temp sensor
  (Model:KTEC-35-S98)• Indoor heat exchanger sensor
  (Model:PT2M-51H-S3)
• Compressor temp sensor
  (CU-KS12NK1A......

Page 23

3.  DIMENSIONAL DATA
Indoor Unit  CS-KS12NB41 & CZ-18BT1U
  CS-KS18NB4UW & CZ-18BT1U
6-5/16 6-11/16
1-3/16 (30)
4-19/32
1-25/32
1-25/32
2-3/32
8-15/32
22-5/8 (575)
11-5/32 (283)
3
65
Less than 31/32   Less than 31/32 
3-5/8
22-5/8 (575)
12-7/8
 Suspension bolt pitch
 Suspension bolt pitch21-1/32 (534)
21-1/32
 (534)
12-7/16
23-5/8 (600)
Ceiling opening dimensions
23-5/8 (600)
Ceiling opening dimensions
7
Center of
panel
24-19/32 (625)
24-19/32 (625)13-5/32 (334)
14-3/32 (358)
12 2
2
2
7-11/16
4-29/32
A...

Page 24

10-13/16
3-19/32
ID:23/322-ID:15/16
21-3/16
6-3/32
4-9/32 2-5/32
Narrow tube service valve
dia.1/4" (6.35) Wide tube service valve
dia.3/8" (9.52) 3-19/32
15/32
10-7/16(265)
11-13/32
12-7/16
Unit : inch (mm)
(852-0-0010-12600-0)
28-11/32 (720) 2-1/8
21-9/16 (548) 5/8
 
Outdoor Unit CU-KS12NK1A
24 

Page 25

Unit : inch (mm)
(852-0-0010-13300-0)
Narrow tube service valve
dia.1/4" (6.35)Wide tube service valve
dia.1/2" (12.70)
4-3/8 2-5/326-17/32
5-23/32 3/32
26-3/8 (670) 23/32
1-13/16 34-21/32 (880)23-15/16 5-11/32
15/32
11-7/32 (285)
12-7/32
13-5/32
11-17/32
ID:23/322-ID:15/161-3/8
2-17/32
2-13/32
 
Outdoor Unit CU-KS18NKU
 CU-KS18NKUA
25 

Page 26

Wide tube
Narrow tube
Heat exchanger
Indoor unit
Strainer
O.D.
3/8"
(9.52 mm)
O.D.
1/4"
(6.35 mm)
4.  REFRIGERANT FLOW DIAGRAM
4-1.  Refrigerant Flow Diagram
Indoor Unit CS-KS12NB41 & CZ-18BT1UOutdoor Unit CU-KS12NK1A
Compressor
Accumulator Wide tube
service
valve
Narrow
tube
service
valve
Heat exchanger
Muffler
Cooling cycle
Outdoor unit
Electric
expansion
valve
M
Muffler
H.P. High pressure
switch
26 

Page 27

Wide tube
Narrow tube
Indoor unit
O.D.
1/2"
(12.7mm)
O.D.
1/4"
(6.35 mm)
Indoor Unit CS-KS18NB4UW & CZ-18BT1UOutdoor Unit CU-KS18NKU
 CU-KS18NKUA
Heat exchanger
Strainer
Compressor
Accumulator Wide tube
service
valve
Narrow
tube
service
valve
Heat exchanger
Muffler
Cooling cycle
Outdoor unit
Electric
expansion
valve
M
H.P. High pressure
switch
27 

Page 28

Hi Fan Lo Fan
Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 115V)
(1) Low pressure performance chart
(2) Operating current performance chart
(3) Indoor discharge air performance chart
  Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
NOTE
5.  PERFORMANCE DATA
5-1.  Temperature Charts
Indoor Unit CS-KS12NB41 & CZ-18BT1U Outdoor Unit CU-KS12NK1A
Low pressure at wide tube service valve
psig(MPaG) Operating...

Page 29

• Check each performance value in test-run mode. Electrical performance values represent a combined indoor/outdoor value.
NOTE
Cooling Characteristics (RH : 46%, Indoor fan speed : High fan) (60Hz, 230V)
(1) Low pressure performance chart
(2) Operating current performance chart
(3) Indoor discharge air performance chart
 
 
Indoor Unit CS-KS18NB4UW & CZ-18BT1U Outdoor Unit CU-KS18NKU or CU-KS18NKUA
Hi Fan Lo Fan
Low pressure at wide tube service valve
psig(MPaG) Operating current (A)73
(0.5)102
(0.7)131...

Page 30

5-2.  Cooling Capacity
Indoor Unit  : CS-KS12NB41 & CZ-18BT1U
Outdoor Unit  : CU-KS12NK1A
Power Supply  :  115V Single Phase 60Hz
< Cooling Capacity >
TC : Total Cooling Capacity (BTU/h)   SHC : Sensible Heat Capacity (BTU/h)
1.
Rating conditions (#) 
:  Indoor Unit Entering Air Temp. 80 °F (26.7 °C) DB / 67 °F (19.4 °C) WB
:  Outdoor Ambient Temp. 95 °F (35 °C) DB
2.
3. Above data represents the value when the operation frequency of a compressor is fixed.Above data does not take Freeze Prevention...
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