Panasonic SCROLL C-SB Series Instructions for use

Ver.201909
Scroll Compressors
Application Manual
Panasonic Appliances Compressor (Dalian) Co., Ltd.

TABLE OF CONTENTS
Safety Instructions .............................................................................................................................1
1.0 Structure and Operating Characteristics......................................................................................2
1.1 Key Components......................................................................................................................2
1.2 Scroll Compressor Operating Characteristics ..........................................................................4
1.3 Compressor Design Pressure ..................................................................................................5
1.4 Refrigerant Oil ..........................................................................................................................5
1.5 Motor Type................................................................................................................................5
2.0 System Design Considerations....................................................................................................6
2.1 Air-Conditioning System Design Criteria ..................................................................................6
2.2 Selection of Electrical Wiring....................................................................................................8
2.3 Voltage Balance .....................................................................................................................10
2.4 Deep vacuum Operation ........................................................................................................10
2.5 Brief Power Interruptions........................................................................................................10
2.6 Protection Devices .................................................................................................................10
2.7 Application Standard & Limit (For R22, R407C and R410A) .................................................14
2.8 Compressor Selection Table ..................................................................................................15
2.9 System Test Data Table..........................................................................................................16
3. 0 Assembly and Manufacturing Process Considerations ............................................................19
3.1 Removing Rubber Plug ..........................................................................................................19
3.2 Compressor Mounting ............................................................................................................19
3.3 Residual Moisture...................................................................................................................19
3.4 Tube Brazing ..........................................................................................................................19
3.5 Leakage Test ..........................................................................................................................22
3.6 Evacuation..............................................................................................................................22
3.7 Refrigerant Charge.................................................................................................................22
3.8 Wiring Connections ................................................................................................................22
3.9 Terminal cover and clip...........................................................................................................23
3.10 Preliminary Running .............................................................................................................23
3.11 Start Compressor with Balanced Pressure ..........................................................................23
3.12 Servicing Scroll Compressors ..............................................................................................23
3.13 Other Consideration .............................................................................................................26
4. 0 Troubleshooting ........................................................................................................................27
5. 0 Explanation for FAQ ..................................................................................................................29

1
Safety Instructions
Panasonic scroll compressor meets strict safety and operating standards. As the installer or service
person, it is an important part of your job to read this instruction carefully before beginning.
ELECTRICAL
SHOCK HAZARD
●Make sure the unit utilize grounded connection.
●Disconnect all input power before servicing.
●Install the cover of terminal box before energized.
EXPLOSION OR
FIRE HAZARD
●Remove the refrigerant before brazing operation.
●Do not compress air or energize the compressor under vacuumed
condition.
●Use only approved refrigerants and refrigeration oil.
PERSONAL
INJURY
● Personal safety equipment must be used.
BURN HAZARD
●Do not touch the compressor when it is running or stopping until it
has cooled down.

2
1.0 Structure and Operating Characteristics
1.1 Key Components
C-SB and C-SC series scroll compressors are manufactured in Panasonic Appliances Compressor (Dalian)
Co., Ltd.
1.1.1 C-SB Series Scroll Compressors
C-SB series are vertical hermetic scroll compressors. The discharge baffle divides the compressor into two
rooms: high-pressure room and low-pressure room. The motor is rigidly attached to the shell; Crankshaft is
supported by main frame and bearing plate which are welded to the shell. Pump assembly consists of fixed
scroll and orbiting scroll and Oldham ring. Orbiting scroll rotates on the surface of the main frame.
Figure 1-1 C-SB Scroll Compressor Components
See a cutaway view of C-SB series compressor in Figure1-1.
Discharge Tube
Internal linebreak
Bearing Plate
Motor
Main Frame
Suction Tube
Crankshaft
Fixed Scroll
Orbiting Scroll
Check Valve
Prevents reverse-rotation
at shutdown.
PTFE Bearings
Bronze with Teflon
impregnation.
Tip Seal of PPS resin
Almost perfect sealing
helps to improve
efficiency.
Discharge Baffle
Decreases the strain of fixed
scroll and forming an inner
discharge muffle
Oil pump
Sound reducing shell
Oil
SAY56T (R22)
FV68S (HFCs)
Magnet
Electric Terminal

3
1.1.2 C-SC Series Scroll Compressor
The C-SC series are vertical scroll hermetic compressor, which are configured with the motor below the pump
assembly. The fixed scroll divides the compressor into two rooms: high-pressure room and low-pressure room.
The motor is fixed between main frame and bearing plate by screws .The fixed scroll is fixed to the main
frame by screws and the orbiting scroll rotates on the main frame.
Figure 1-2 C-SC Scroll Compressor Components
See a cutaway view of C-SC series compressor in Figure1-2.
Internal linebreak
Bearing Plate
Motor
Suction Tube
Discharge Tube
Crankshaft
Fixed Scroll
Orbiting Scroll
Main Frame
Suction Screen
Oil
SAY56T (R22)
FV68S (HFCs)
Check Valves
Prevent reverse-rotation at
shutdown.
Ball Bearing
Heavy duty ball bearing.
Tip Seal of PPS resin
Almost perfect sealing
helps to reduce starting
torque and improve
efficiency during operation.
Oil Pump
Sound reducing shell
For Discharge thermostat
Magnet
Electric Terminal
Roller Bearing
Heavy duty roller bearing.

4
1.2 Scroll Compressor Operating Characteristics
Panasonic scroll compressor is designed with fixed eccentric and tip seals for axial sealing, resulting in low
sound level and minimal gas leakage and therefore excellent efficiency. Separation of suction gas from the
discharge side reduces heat transfer, further improving efficiency.
The Figure 1-3 below describes the scroll compression process:
First orbit; SUCTION gas enters at the perimeter of the scroll elements and is sealed as the scrolls rotate
approximately one revolution.
Second orbit; During the COMPRESSION process, the gas is further compressed towards the center of the
scroll elements to an intermediate pressure.
Third orbit; In the DISCHARGE orbit, the gas is further compressed to discharge pressure and then exits at
the center through the discharge port.
With a three step simultaneous process of suction, compression and discharge and two gas pockets in each
step that are 180 degrees apart, the compression process is balanced and very smooth, resulting in high
efficiency, low sound/vibration and excellent reliability.
First Orbit: SUCTION
Second Orbit: COMPRESSION
Third Orbit: DISCHARGE
Figure 1-3

5
1.3 Compressor Design Pressure
The compressor’s design pressure is shown in Table 1-1. The operating pressure in the system shall be lower
than compressor design pressure.
Table 1-1 Compressor Design Pressure
Refrigerant
Low Pressure Side
MPa(G)/psig
High Pressure Side
MPa(G)/psig
R22
1.6/232
3.0/435
R407C
1.6/232
3.3/479
R410A
2.21/320
4.15/602
1.4 Refrigerant Oil
To improve the reliability, the specified designed premium quality refrigerant oil is used in the compressor.
The refrigerant oil containing foam suppressor has the excellent thermal stability and high durability for
overload conditions.
1.4.1 Oil Type
Each type of refrigerant oil is specially designed for certain types of refrigerant and operating conditions, if
additional oil charge is added in the field, Only specified oil should be used.
Table 1-2 Type of Oil
Refrigerant
R22
R407C
R410A
R134a
Oil Model
SAY56T
FV68S
FV68S
FV68S
Oil Type
Mineral
Polyvinyl Ether
（PVE）
Polyvinyl Ether
（PVE）
Polyvinyl Ether
（PVE）
1.4.2 Functions of Refrigerant Oil
1) Lubricate the moving parts to reduce mechanical friction.
2) Absorb the heat generated by mechanical friction .
3) Prevent refrigerant leakage at sealing surface.
4) Rust proof.
1.5 Motor Type
Panasonic scroll compressors can be applied under variable types of power sources, the motor type is shown
in Table 1-3.
Table 1-3 Type of Motor
Frequency
Motor voltage code
B3
B5
B6
B8
B9
50Hz
200V
220~240V
-
380~415V
-
60Hz
200~220V
-
208~230V
440~460V
380V

6
2.0 System Design Considerations
2.1 Air-Conditioning System Design Criteria
2.1 .1 Condensing Pressure and Evaporating Pressure
The recommended condensing pressure and evaporating pressure for R22 systems at standard conditions
are shown in the table 2-1 according to JIS standard.
Table 2-1 Recommended condensing and evaporating pressure
Pressure
Cooling
Heating
High side MPa(G)
1.8
2.0
Low side MPa(G)
0.45
0.40
It is necessary to adjust the system if the high side pressure or low side pressure has more than 0.1MPa
deviation from the recommended pressure. Some reasons are listed in Table 2-2 for pressure deviation.
Table 2-2 Reasons of pressure deviation
Item
Low Side Pressure
Lower
Middle
Higher
High Side
Pressure
Higher
<a>
--
<c>
Same
--
OK
--
Lower
<d>
--
<b>
Note: Higher: The tested pressure is higher than recommended pressure.
Lower: The tested pressure is lower than recommended pressure.
Same:The tested pressure is approximately same as recommended pressure.
<a> Too big of compressor size
<b> Too small of compressor size
<c> Too high of dry bulb temperature in the condenser side
Excessive refrigerant has charged in the system
Uneven refrigerant distribution in the circuits of condenser
Too low rotation speed of condenser fan
<d> Too low wet bulb temperature in the evaporator side
Uneven refrigerant distribution in the circuits of evaporator
Too low rotation speed of evaporator fan
Lack of refrigerant charge in the system
Too big superheating degree caused by improper size expansive valve or capillary
2.1.2 Sub Cooling Degree
The sufficient sub cooling degree can not only increase the cooling and heating capacity but also can keep

7
the inlet of expansion valve or capillary full of liquid state refrigerant.
On the contrary, the insufficient sub cooling will cause flash gas occurring at the inlet of expansion valve,
which will result in capacity reduction and increasing vibration, noise.
2.1.3 Superheating Degree
In order to prevent compressor from flooded back operation, a minimum suction superheating degree of 5K
[10F], and a minimum sump superheating degree of 12K [21F] must be maintained.
It is necessary to keep the proper superheating degree since too big superheating will cause the high
discharge temperature and the decrease of refrigerant mass flow rate.
2.1.4 Discharge Gas Temperature
The recommended discharge temperature is not higher than 95℃[200F] under the standard conditions.
2.1.5 Suction Accumulator
For air-conditioning system in which capillary is used or heat pump system, suction accumulator is necessary
to prevent the uncontrolled liquid flooding back.
The proper size suction accumulator can:
1) Prevent liquid refrigerant migrating to compressor
2) Prevent liquid refrigerant being sucked into compressor.
The suction accumulator used in the system should at least meet the requirements as follow:
1) The size of the accumulator must be greater than 60% total refrigerant volume.
2) To ensure well oil return, a φ1.5 mm orifice is necessary in the suction accumulator.
3) Filter mesh must be used to prevent orifice being blocked when orifice is smaller than φ2.0 mm
2.1.6 System Charge Limit
The proper system charge can keep the system parameters in the normal level, such as cooling and heating
capacity, sub cooling degree, suction and discharge temperature, compressor’s sump temperature, etc.
The refrigerant charge and refrigerant oil in the system should keep the ratio as follow:
Oil (kg)/ Refrigerant (kg)≥0.35
Note: Specific gravity of the Oil using in R22 series compressors is 0.92
Specific gravity of the Oil using in R407C/R410A/R134a series compressors is 0.94
If oil/refrigerant ratio is lower than 0.35, it will cause dilution of oil and lack of lubrication inside of compressor.
So please inform us before the system being tested under 0.35>oil(kg)/refrigerant (kg) ≥0.3 condition,
some detailed advices will be given about oil level in compressor .
As a general requirement, oil (kg)/refrigerant (kg) >0.3 shall be kept.

8
2.2 Selection of Electrical Wiring
Voltage drop may occur due to the large current draw during compressor starting. The starting failure will
occur if the starting voltage is under the range of compressor specifications, .So it is necessary to select the
proper size of electrical wire.
2.2.1 Voltage Drop
See Figure 2-1 for the explanation of voltage drop.
a) Set Voltage:
The voltage applied to compressor terminals before compressor is started.
b) Starting Voltage:
The voltage applied to compressor terminals when compressor is being started. When compressor
is starting, the big starting current will cause the drop of voltage. It will be very hard to start
compressor if the starting voltage is too low.
c) Running Voltage:
The line voltage applied to compressor terminals when compressor is running stably. This running
voltage is a little lower than set voltage.
The big voltage drop happens in compressor starting process, it will cause the failure of starting if
the starting voltage is lower than 85% of rated voltage.
Figure 2-1
Voltage
Set voltage
Starting voltage
Voltage drop
Running voltage

9
2.2.2 Selection of Electrical Wiring
The recommended wiring size is shown in the table 2-3.
Type of Unit
Window & Commercial Type Unit
Split Type (Separate Type)
Table 2-3 SELECTION OF ELECTRICAL WIRING
Starting
current (A)
Size of electrical wire（mm2）
Remark ① or Remark ①+②（heat-resistance Temperature:
60°C[140°F]: min.）
Remark③（heat-
resistance
Temperature:
120°C[248°F]
min.）
5m max.
10m max.
15m max.
20m max.
30m max.
50m max.
1m max.
20max.
2.0
2.0
2.0
3.5
5.5
8.0
2.0
30max.
↑
↑
3.5
5.5
↑
14.0
↑
40max.
↑
3.5
5.5
↑
8.0
↑
↑
50max.
↑
↑
↑
8.0
14.0
22.0
↑
60max.
↑
5.5
↑
↑
↑
↑
↑
70max.
3.5
↑
8.0
14.0
↑
↑
3.5
80max.
↑
↑
↑
↑
22.0
30.0
↑
90max.
↑
↑
14.0
↑
↑
↑
↑
100max.
↑
8.0
↑
↑
↑
38.0
↑
110max.
↑
↑
↑
↑
↑
↑
↑
120max.
5.5
↑
↑
22.0
30.0
↑
↑
140max.
↑
14.0
↑
↑
↑
50.0
5.5
160max.
↑
↑
22.0
↑
↑
↑
↑
180max.
↑
↑
↑
↑
38.0
60.0
8.0
200max.
8.0
↑
↑
30.0
↑
↑
↑
220max.
↑
↑
↑
↑
50.0
80.0
↑
240max.
↑
↑
↑
↑
↑
↑
14.0
CAUTION OF GROUNDING:
The internal motor protector cannot protect the compressor against all possible failures.
Please be sure that the system utilizes the grounding connection when is installed in the field.
①
Power
terminal
compresso
indoor
③
①
②
③
①
Power
source
terminal
plate
compressor
indoor
③
compressor
indoor
Power
source
terminal
plate

10
2.3 Voltage Balance
The voltages between compressor terminals should be balanced. When the line voltages applied to a three-
phase compressor are not equal, unbalanced current in the stator windings will result. A small percentage
voltage unbalance will result in a much larger percentage current unbalance. Consequently, the temperature
rise of the motor windings is unbalanced and the overheated motor will cause the compressor failure.
The temperature rise can be estimated using the formulation as follows:
Percent Voltage Unbalance=100 X Max. Volt. Deviation from Avg.Volt./ Average Volt.
Temperature Rise= [Percent Voltage Unbalance]2 X 2
To well protect the motor, The voltage unbalance(%) should be lower than 2%.
2.4 Deep vacuum Operation
Scroll compressors should never be used to evacuate an air-conditioning or refrigeration system. As a high
volumetric efficiency machine, compressor will achieve extremely low vacuums when the suction side is
restricted, this may cause internal arcing at the electric terminal and the damage of compressor.
2.5 Brief Power Interruptions
The brief power interruptions can cause powered reverse rotation on single phase compressors. When power
is reapplied, the compressor may continue to run in the reverse direction for several minutes, until the internal
linebreak cycles the compressor off. After tripping the linebreak, the compressor will operate in the correct
direction when power is restored. During powered reverse rotation, the compressor will sound much louder
than during normal operation.
To prevent this situation, an anti-short cycle timer of 3 minutes off / 7 minutes on duration is recommended.
This will allow the compressor to be de-energized for at least 3 minutes after each power interruption.
2.6 Protection Devices
2.6.1 Internal Motor Protector
Panasonic scroll compressors are protected by internal linebreaks on the motor windings for single phase
and three phase models. Internal linebreaks respond to over-current, high temperature and a combination of
both.
The protector is the automatic reset device containing a snap action bimetal switch. In three phase
compressors they protect against secondary single phasing. The motor protector is designed to protect
against variety fault conditions such as failure to start, running overload and fan failure, locked rotor, abnormal
operation of contactor. The test is necessary to be sure that the motor protector will not trip under the overload
conditions.
For B3 models (for Japan market, 3PH-50Hz-200V/3PH-60Hz-200~220V), the motor is protected by internal
thermostats with external breakers. The internal thermostats respond only to high temperature, so an outside
overload relay is required to protect compressor against over-current conditions.

11
2.6.2 Protection Devices Required
For air-conditioning or heat pump unit, the following protective devices should be installed:
1) Reverse Phase Protector
Scroll compressor will only compress in one rotational direction. This is very important for three phase
compressors since three-phase induction motor will run in either rotational direction equally depending on
phasing of the power. Reverse rotation will result in excessive noise, and no suction / discharge pressure
differential appears as well as no cooling effect in the suction line.
For three phase systems, mechanic device or reverse rotation module in the system control unit is necessary
in preventing three phases compressor from running in the reverse rotational direction.
2) Discharge Gas Thermostat
The discharge temperature will rise rapidly if the compressor is running under the overload conditions or lack
of refrigerant conditions.
The maximum discharge temperature should be maintained by a discharge thermostat .
For the C-SB series, it is located on the discharge line within 100mm(4”) of the compressor shell and must
not exceed 130℃(266F). The discharge thermostat should be installed on top side of the discharge tube, it
should not be attached underneath the tube. It is important that the discharge thermostat should also be well
insulated as below picture.
The C-SC series has a sensor well on the top shell and that temperature must not exceed 135℃(275F).

12
To maintain these limit, trip settings of 130±5℃(265±10F) and reset of 95±11℃(205±20F) for C-SB, trip
setting of 135±5℃(275±10F) and reset of 86±15℃(187±27F)for C-SC should be required.
3) Low Pressure Switch
Panasonic scroll compressors require a low-pressure switch to protect against loss of refrigerant conditions.
The recommended settings are listed in Table 2-4.
Table 2-4 Low Pressure Switch Setting
Refrigerant
Cut-Off setting
R22
4.3 psig (0.03MPa G)
R407C
7.3 psig (0.05MPa G)
R410A
22 psig (0.15MPa G)
R134a
4.3 psig (0.03MPa G)
The temperature in the scroll set and motor will rise rapidly due to loss of refrigerant charge. The low-pressure
switch will react upon low pressure occurs in the system. Sometimes, the low-pressure switch will react in
priority to the action of discharge thermostat or motor protector when the large amount of refrigerant leaks in
the short time.
Do not operate the compressor in exceeding 30 seconds when running under 0.03MPa (G).
4) Crankcase Heater
The refrigerant is usually gathering in coldest point within the system during OFF cycle and the compressor
might become the right one where most of liquid refrigerant centralized.
The liquid refrigerant may be taken into scroll plates with refrigerant oil in foam status when compressor
restarts. It may cause the damage of the scroll plates.
Panasonic recommends crankcase heaters should be used on all applications to ensure long lasting reliability.
A 35-Watts crankcase heater is recommended for C-SB series and an 88-Watts crankcase heater for C-SC
series. The crankcase heater must be energized for a minimum of 5 hours prior to starting compressor.
The crankcase heater should be well attached to the compressor shell, shown as Fig 2-2 and Fig 2-3.

13
Figure 2-2 Position of crankcase heater for C-SB models
Figure 2-3 Position of crankcase heater fo C-SC models
5) High-Pressure Switch
Panasonic scroll compressors require a high-pressure switch in order to protect the compressor during
blocked fan or fan failure conditions. The recommended settings are shown in Table 2-5
Table 2-5 High Pressure Switch Setting
Refrigerant
Cut-Off setting
R22
435 psig (3.0MPa G)
R407C
464 psig (3.2MPa G)
R410A
602 psig (4.15MPa G)
R134a
348 psig (2.4MPa G)
Bottom
Case
Crankcase
Heater

14
2.7 Application Standard & Limit (For R22, R407C and R410A)
The following requirements apply to vertical type hermetic scroll compressors:
Standard: Applicable to ordinary conditions in Japan JIS B8616 or standards relative to JIS B8616, such
as standard rating conditions, maximum operating conditions, low temperature conditions, etc.
Limit: Applicable to transitional brief period, such as starting and beginning of defrost mode.
Table 2-6
No.
Item
Standard
Limit
Note
1
Evaporating Temp.
Range
-15~12℃(5～54 °F)
-25~15℃(-13～59 °F)
2
Condensing Temp.
Range
30~65℃(86～149 °F)
68℃(155 °F)
65℃(149 °F) max. for R407C/R410A
3
Compression Ratio
2 ~ 6
10
(8 max. for R407C/R410A)
4
Winding Temp.
115℃(240 °F) Max.
125℃(257 °F)
5
Shell Bottom Temp.
90℃(194 °F) Max.
Evaporating Temp. + 12K(21 °F) Min.
Operating
Ambient Temp. + 11K(20 °F) Min.
Not Operating
6
Discharge Gas
Temp.
115℃(240 °F) Max.
130℃( 266°F) Max. for C-SB
Within 10cm(4in.) of
the discharge fitting
135℃( 275°F) Max. for C-SC
Inside of the well pile
on the top of comp.
7
Suction Gas Temp.
Superheat: 5K(10 °F) Min.
No excessive noise
Items 4,5,6 and 14
shall be kept.
8
Running Voltage
Within ±10% of the rated voltage
Voltage at comp.
terminals
9
Starting Voltage
Three Phase Models: 85% of the rated voltage min.
Voltage at comp.
terminals
Single Phase Models: 90% of the rated voltage min.
10
On/Off Period
On Period: Until the oil level returns to the center of the lower
bearing
For at least 7
minutes -on/3
minutes-off is
recommendable
Off Period: Until balance of high and low pressure is obtained
11
Refrigerant Charge
Oil/Refrigerant(wt.)≥0.35
(Specific gravity of the Oil: SAY56T: 0.92; FV68S: 0.94)
12
Life Time
200,000 cycle
13
Minimum Oil Level
C-SB: Center of the lower bearing
C-SB:Bottom of the lower bearing
C-SC: No less then 70% of the initial oil charge
14
Abnormal Pressure
Rise/Drop
Pressure Rise: see the Table 2-5
By high pressure
switch
Pressure Drop: see the Table 2-4
By low pressure
switch
15
Copper Piping
Stress
Start/Shutdown: 34.32N/mm2 Max. Run: 12.26N/mm2 Max.
15
System Moisture
Level
200ppm Max.
16
System
Uncondensable
Gas Level
1 Vol.% Max.
Residual Oxygen 0.1 Vol.% Max.
24 hrs. after
vacuuming:
1.01kPa (0.15 psig)
Max.
17
Tilt
5。Deg.Max.
* Operation beyond the above limits must be approved by PAPCDL.

15
2.8 Compressor Selection Table
The successful application of scroll compressor is dependent on a good match between system design and
compressor. Please fill in the following table and inform us.
Table 2-7
[Required Information for Selection]
Company Name: Data:
SYSTEM INFORMATION
Type of unit
*[ ] Split system [ ] else
*[ ] Air conditioning [ ] Heat pump
Rated capacity
Cooling: kW
Heating: kW
Target market
(country)
Power source
Phase: Frequency: Voltage:
Amount of refrigerant
charge
Total: g (piping length m)
Additional charge g/m
Piping design
Pipe length max m
Estimated Production
Quantity
units/year
Estimated Production
Date
Production Place
COMPRESSOR
Application
Nominal output
Rated capacity
kW (ARI)
Power source
Phase: Frequency: Voltage:
Remark:

16
2.9 System Test Data Table
In order to make better application of the compressor, the system test result is very important for both sides.
Please fill the table below and inform us.
[System Test Result]
Data:
System Model : Compressor Model:
Refrigerant charge: kg Power source:
2.9.1 Maximum operating condition
1) Table 2-8: Temperature Conditions
Mode
Indoor
Outdoor
Cooling
DB/WB: / ℃
DB/WB / ℃ or
Water Inlet/ Outlet / ℃
Heating
DB/WB: / ℃
DB/WB: / ℃ or
Water Inlet/Outlet / ℃
2) Table 2-9: Performance data
Item
Cooling
Heating
Minimum
Voltage
Rated
Voltage
Maximum
Voltage
Minimum
Voltage
Rated
Voltage
Maximum
Voltage
Voltage (V)
Compressor input (W)
Compressor Current(A)
Motor Winding
Temperature (℃)
Compressor discharge
gas temp. (℃)
Compressor suction
gas temp. (℃)
Compressor shell
bottom temp. (℃)
Condensing
Temperature(℃)
Evaporating
Temperature(℃)
Temp. before expansive
valve(℃)
High Side Pressure
MPa(G)
Low Side Pressure
MPa(G)
Remark: G: gauge pressure

17
2.9.2 Low-Temperature Operation Test
1) Table 2-10: Temperature Conditions
Mode
Indoor
Outdoor
Cooling
DB/WB: / ℃
DB/WB / ℃ or
Water Inlet/ Outlet / ℃
Heating
DB/WB: / ℃
DB/WB: / ℃ or
Water Inlet/Outlet / ℃
2) Table 2-11: Performance data
Item
Cooling
Heating
Minimum
Voltage
Rated
Voltage
Maximum
Voltage
Minimum
Voltage
Rated
Voltage
Maximum
Voltage
Voltage (V)
Compressor input
(W)
Compressor Current
(A)
Motor Winding
Temperature (℃)
Compressor
discharge gas temp.
(℃)
Compressor suction
gas temp. (℃)
Compressor shell
bottom temp. (℃)
Condensing
Temperature(℃)
Evaporating
Temperature(℃)
Temp. before
expansive valve(℃)
High Side Pressure
MPa(G)
Low Side Pressure
MPa(G)
Remark: G: gauge pressure

18
2.9.3 Start performance and Voltage drop performance
Table 2-12:
2.9.4 The Sample Compressors Information
1) Total sample quantity:
2) Series numbers of the tested samples:
3) The date of receiving the samples:
Tested item
Customer’s
test standard
Test result
Customer’s
Judgment
Test
Condition
Remark
Voltage drop under
overload conditions
Restart after overload
operation
Restart with liquid
refrigerant depositing
in compressor