1. IZFI
Condensing Unit
Installation &
Commissioning

2. Contents Refrigerant Charging Correct Tools CoreSense Product Location
Piping
Wiring Diagrams
Leak Check & Evacuation

3. Correct Tools

4. IZFI Copeland Scroll™ Indoor CDU
Receiving The Unit
All Units Are Shipped With A Holding Charge Of Dry Nitrogen At A Low But Positive Pressure. Suitable Labeling Is Prominently Displayed On The Unit. Two Schrader Type Connections Are Provided For The Convenient Checking Of The Integrity Of The Holding Charge.
It Is Very Important To Check That This Holding Pressure Exists At The Time You Receive Each Unit From Us Or Our Authorized Representatives. If, After Checking, You Find The Holding Charge Non-existent Or Low, You Should Immediately Inform Us Or Our Authorized Representative. Failure To Do So Could Void Your Claim For Other Related System Faults At A Later Period. Transit Damage Is Essentially An Insurance Claim And Not Covered Under Warranty. It Is Also Advisable To Inspect The Rest Of The Unit For Obvious Physical Damage And Inform Us Or Our Authorized Representative In Case Any Is Discovered.

5. IZFI Copeland Scroll™ Indoor CDU
Correct Tools
Vacuum Pump Of Sufficient Size And Capable Of Pulling A Vacuum Of At Least 100 Microns
A Four Port Charging Manifold
3/8” Hose To Vacuum Pump
All Hose Fitted With Removable Schrader Depressors
Clean And New Refrigerant
Oxygen-free Nitrogen And Regulators
Reliable Electronic Vacuum Gauge
Clean And New Compressor Oil
Thermometer To Measure Discharge And Suction Temperature
Leak Detector
Electrical Insulation Performance Measuring Gauge

6. Product Location

7. IZFI Copeland Scroll™ Indoor CDU
Installation Position
500mm
500mm
500mm
Recommendation To Have At Least 500mm Between Condenser Face And Adjacent Wall.
Clearance Of At Least 500mm On Remaining Three Sides And Top For Service And Free Air Circulation

8. IZFI Copeland Scroll™ Indoor CDU
Installation Position
500mm
500mm
500mm
500mm
500mm
2000mm
2000mm
Where Multiple Units Are To Be Installed In The Same Location;
The Contractor Needs To Consider Each Individual Case Carefully. There Can Be Many Variations Of Unit Quantities And Available Space. In General Terms, Air Recirculation And Local Heat
Buildup Should Be Avoided At All Times.

9. Piping

10. IZFI Copeland Scroll™ Indoor CDU
Refrigerant Piping Connections
Refrigeration Grade Copper Tubing Must Be Used
Pipe Size Should Be Of Sufficient Size To Ensure Optimum Performance And Good Oil Return
Do Not Assume That The Service Connection Sizes On The Unit Are The Correct Pipe Sizes
Copper Tubes Should Be Clean, Dehydrated And Capped. If System Is Left For Any Reasonable Time (Say 2 Hours), Pipes Should Be Recapped.

11. IZFI Copeland Scroll™ Indoor CDU
How To Properly Size Pipes
Recommended Refrigerant Velocities
Liquid Lines
Below 1.5m/S From Receiver To Evaporator
Suction Lines
Run: 4m/S Minimum
Riser: 8m/S Minimum
Pressure Drop Considerations
Should Not Be Greater Than That Corresponding To About 1K Change In Saturation Temperature For Each Segment
Determining Factor Is Refrigerant Velocities Rather Than Pressure Drops

12. IZFI Copeland Scroll™ Indoor CDU
How To Properly Size Pipes
The next two slides show the refrigerant velocity and pressure drop across the length of pipe.
Cooling Capacity: useful capacity or evaporator capacity, not compressor capacity
Tdew: evaporating temp
Temperature in Inlet or Delta Tsh: temperature at evaporator outlet or evaporator superheat
Length: total equivalent length or straight pipe + fittings
Insulation thickness: needed to estimate the heat ingress or heat pick-up in the suction line
Surrounding Air: ambient temperature where suction line is exposed. Needed to estimate the heat ingress
Te/Tc/Tsc/Tsh: Needed to compute refrigerant flow
Mean velocity should meet the recommended velocities
Tdew, change: equivalent change in saturation temp of the pressure drop

13. IZFI Copeland Scroll™ Indoor CDU
How To Properly Size Pipes
Cooling capacity: total capacity (including heat pick-up in suction line)
Tbub: condensing temp
Temperature in inlet or delta Tsc: temperature at liquid outlet valve or subcooling at liquid outlet valve. Note that ZXL CDU has an EVI which subcools the liquid refrigerant. Remember to consider this when sizing the liquid of ZXL units.
Mean velocity should meet the recommended velocity in liquid lines
Tbub change is the equivalent change in saturation temp of the pressure drop

14. IZFI Copeland Scroll™ Indoor CDU
Suction Line Riser
P-Traps And Reduced Pipe Diameters May Be Required For Suction Lines Where Long Vertical Risers Cannot Be Avoided
A Trap Is Necessary In The Suction Line At The Indoor Evaporator Coil If The Indoor Evaporator Coil Is More Than 1.2m Below The Outdoor Condensing Unit
Downward Direction Of Flow And Horizontal Line Size Is Increased So Pressure Drop Is Kept In An Acceptable Range
Riser Line Size Is Reduced To Maintain Refrigerant Velocity And Oil Return Up The Riser

15. IZFI Copeland Scroll™ Indoor CDU
Liquid Line Temperature
Due To The Increase Subcooling Effect By The Vapor Injection Plate Heat Exchanger
Sizing The Liquid Line Pipe Should Consider The Liquid Temperature And Liquid Line Must Be Insulated
TXV And Solenoid Valve Selection Should Take Into Consideration The Liquid Line Temperature
Evap Temp, °C
Ambient temp, °C 27 32 38 43 46
-40
-17.1
-14.6
-11.9
-9.2
7.8
-35
-12.8
-10.2
-7.4
-4.7
-3.3
-30
-8.4
-5.7
-3.0
-0.2
1.2
-25
-4.0
-1.2
1.6
4.3
5.7
-20
0.6
3.3
6.0
8.6
10.1
-15
6.7
8.8
11.4
14.1
15.4
-10
10.7
12.6
14.9
17.3
18.5 -5
14.4
16.0
17.9
19.9
21.6
18.1
19.4
20.9
22.3 - 5
20.5
21.2
22.1
22.5
Typical Liquid Line Temperature, °C
IZFI Condensing Unit Is Designed With Vapor Injection Technology. The Liquid Line Temperature Will Be Subcooled By The Vapor Injection Plate Heat Exchanger.

16. IZFI Copeland Scroll™ Indoor CDU
Pipe Support
Pipe Runs Should Be Kept As Short As Possible Using The Minimum Number Of Directional Changes
Suction Line Should Be Ideally Sloped (1/200~1/250)
All Pipes Should Be Adequately Supported
Tube Size
Max Distance Between 2 Clamp Support
12.7mm (1/2”)
1.20 m
16.0mm (5/8”)
1.50 m
22.0mm (7/8”)
1.85 m
28.5mm (1-1/8”)
2.20 m

17. Electrical

18. IZFI Copeland Scroll™ Indoor CDU
Electrical characteristics
Models
Rated Voltage / Hz
RLA
Max.
Operating Current
LRA
Contactor Rating
Min.
Circuit
Ampacity
Fuse
IZFI526-TFD
380/420V 50Hz
12.3
13.7
74.0 28
18.28
28.0
IZFI536-TFD
14.6
16.0
102.0
22.55
33.0
IZFI550-TFD
21.7
25.0
118.0 32
31.43
49.0
IZFI559-TFD
23.0
29.0
33.05
52.0
IZFI568-TFD
20.2
30.0
139.0
29.55
45.0
Use Copper Conductors Only
R.L.A. = Rated Load Amps
L.R.A. = Compressor Locked Rotor Amps
In the Event of a Fuse Blowing, Investigate Cause. Do Not Put In a Larger Fuse
The Name Plate Is Located On The Outside surface Of The Unit

19. Connect Power & Earth Connections
Connect Incoming 3Phase Power Supply At Shown Location Above
No 11/17 – Red No 12/18 – Yellow No 13/19 – Blue/Black No 16 – Earth
Earth/Ground Connection
Common Earth Terminal Is Located in Main Junction Box.
# Detail Wiring Diagram For Entire System Is Located On The Lid Of The Junction Box
CoreSenseTM
There Are No Need To Make Any Connection In This CoreSense™ Box Located Above Main Junction Box.

20. IZFI Copeland Scroll™ Indoor CDU
Unit Wiring Diagram
Vapour Inlet Sensor
DLT Sensor
Connection Chart
Ferrule No. On Wires
Used For Connection
To Compressor
To LP Cut Out
To HP Cut Out
To Crankcase Heater
To EXV Port
Vapour Outlet Sensor 19 20 21 22 23
CoreSense Module 24 25 26 27
Legend
Description
CA1 & CA2
Fan Capacitor E1
Crankcase Heater H1
Alarm light (If Used) M1
Compressor
M10 & M20
Fan1 & Fan2 S1
HP Cut Out S3
LP Cut Out S4
Room Thermostat Y4
Solenoid Coil (If Used)
FUSE
2A/250V
CONTACTOR
Compressor Terminals
ELECTRICAL ACCESSORIES BOX
Compressor Power
Supply
Connect Power
PH/50Hz
Field Connection
Remove Jumper Wire From
Terminal No.5 & No.6
For Thermostat Connection0

21. IZFI Copeland Scroll™ Indoor CDU
System Wiring Diagram
Legend
Description A6
CoreSense Module A7
Terminal Box Condensing Unit E1
Crankcase Heater F1
Fuse Control Circuit H1
Signal Lamp/Alarm K1
Compressor (M1) Contactor C1
Contactor Coil M1
Compressor
M10
Fan 1
M20
Fan 2 QO
Isolator (Not Provided) Q1
Circuit Breaker (Not Provided) S1
HP Cut Out S3
LP Cut Out S4
Room Thermostat T1
Transformer Y4
Liquid Line Solenoid Valve
Vapour Outlet Sensor
Vapour Inlet Sensor
Vapour Inlet Sensor
Unit Must Be Grounded, Earth “E” Wires Are Not Shown For Clarity

22. IZFI Copeland Scroll™ Indoor CDU
Electrical characteristics
Install below Controls / protection Devices in Power Circuit
MCB
Single Phase Preventing Device
Phase Reversal Protection
Add A Time Delay Of 3 Minutes For Compressor Start Device. This Is Mandatory In Case The Machine Is Intended To Have Pump Down Cycle Frequently
Fuse

23. Three Phase Power To Compressor
Electrical characteristics
Scroll Compressors Are Directional Dependent (i.e. The Compressor Will Compress The Gas In One Rotational Direction Only)
The Compressor Will Rotate In Either Direction Depending On Power Phase Connection Verification Of Proper Rotation Can Be Made By Observing
That Suction Pressure Drops And Discharge Pressure Rises When The Compressor Is Energized.
If Operated In Reverse The Compressor Is Noisier And Its Current Draw Is Substantially Reduced Compare To Tabulated Values
Operation Of Scroll In Reverse Direction For Brief Period Of Time Is Not Harmful
Continuous Operation in Reverse Direction Could Result In Compressor Failure

24. Leak Check & Evacuation

25. Leak Check Open Both The Liquid And Suction Service Valves
Ensure The Solenoid Valve Is Energized And Open
Pressurize The System To 300 Psig Maximum With Dry Nitrogen
Allow Nitrogen To Reach All Parts Of The System
Check All Joints And Components Using Soap/Bubble Test Or With An Electronic Leak Detector
Wait For At Least An Hour To Ensure The System Is Holding The Pressure And Is Found To Be Leaked-Proof
If The System Loses Any Pressure Over The Course Of 30 Minutes To 1 Hour, Then It Is A Sure Indication That The System Has A Leak
If Leak Has Been Detected, Relief The Pressure And Repair The Leak. For An Effective Installation, The System Must Be Leak Tight.

26. Evacuation
Triple Evacuation Is Recommended (Twice At 1500 Microns And Then At 500 Microns), Breaking The Vacuum To 2psig Each Time With Dry Nitrogen
Installation Of Adequately Sized Access Valves At The Furthest Point From The Compressor In The Suction And Liquid Lines Are Advisable
Do Not Use The Refrigeration Compressor As A Vacuum Pump
A Micron Gauge Must Be Used To Properly Measure The Vacuum Reading.
Do not start the compressor while the system is in vacuum reading
Do not leave a system unattended when it has no charge, a holding charge, or with the service valves closed without securely and electrically locking out the system
The Evacuation Procedure Is Based Upon Achieving An Actual System Vacuum Standard And Is NOT TIME DEPENDENT!

27. Triple Evacuation Process
Open Both The Liquid And Suction Service Valves
Ensure The Solenoid Valve Is Energized And Open
Connect The Vacuum Pump To The Liquid And Suction Service Valves
Start The Vacuum Pump And Then Open The Manifold Gage Valves
Perform Triple Evacuation
Vacuum Until A Pressure Of 1500 Microns Is Reached. Break The Vacuum To 2psig With The Same Type Of Refrigerant To Be Used
Repeat This Process Again
Evacuate The Entire System To 500 Microns

28. Triple Evacuation Process
Valve Off The System, Turn Off Vacuum Pump Then Wait 30 Minutes Before Checking The Micron Gauge Reading
Between 500 And 1000 Microns – Evacuation Is Complete!
Above 1000 But Below 5000 Microns – Moisture Was Not Completely Removed. Re-evacuate The System Until Vacuum Will Hold
Above 5000 Microns – Indicates System Leak
Liquid/Discharge Service Hose: 1/4”
Suction Service Hose: 1/4”
Vacuum Gage
Main Service Connection: 3/8”
Vacuum Pump

29. Check Before You Start LP Switch Setting Oil Separator
Receiver – 18.9 Liter
A Provision For Relief Valve so Made with 3/8”-14 NPTF Connection. Installer Needs To Fit Appropriate Relief Valve
Never Open The Valve Port After Charging
Always Charge From Liquid Line Tube
Oil Separator
Suitably Sized Oil Separator Is Installed In Machine.
You Need To Top Up Below Oil In Specified Quantity Before Vacuuming.
POE Oil –500ml
LP Switch Setting
Check The LP Switch Setting Before You Start The Unit. Refer Label Given On Power Box
Insulate Entire Liquid Pipe & Return Gas Pipe Line

30. Refrigerant Charging Procedure
Pre-Charging Must Be With Liquid Refrigerant Through The Service Valve On The Liquid Line.
If Additional Charge Is Needed, It Should Be Added As Liquid In A Controlled Manner To The Low Side Of The System With The Compressor Running.
Check The Liquid Sight Glass Just Before The Expansion Valve.
Do Not Vapor Charge The Scroll Unit
Charging the scroll with liquid refrigerant will avoid running the compressor under conditions whereby insufficient gas is available to cool not only the motor but also the scrolls. Temperature builds up very quickly in the scrolls if this is not done.
Recommendation is to break the vacuum in the system with partial charge of refrigerant, then start the system. It is recommended to charge the ZX unit with refrigerant via its service valves.
Charge The Unit Through The Service Valves

31. Refrigerant Charging Procedure
Superheat
Check The Superheat Settings At The Expansion Valve (TXV) Make Sure The Setting Is Correct To Avoid Liquid Flood Back.
Check That The Suction Superheat At The Unit Is 10-15K
Unit
R404A (Lit)
IZFI526-TFD
10.8
IZFI536-TFD
15.7
IZFI550-TFD
18.7
IZFI559-TFD
IZFI568-TFD
The Above Table Indicates The Approximate Holding Capacity If The Receiver Is At 32⁰C When It Is 80% Full.

32. Refrigerant Charging Procedure
Liquid Line Temperatures
R404A
Ambient ⁰C
Evap Temp ⁰C 27 32 38 43 46
-40
-17.1
-14.6
-11.9
-9.2
-7.8
-35
-12.8
-10.2
-7.4
-4.7
-3.3
-30
-8.4
-5.7
-3.0
-0.2
1.2
-25
-4.0
-1.2
1.6
4.3
5.7
-20
0.6
3.3
6.0
8.6
10.1
-15
6.7
8.8
11.4
14.1
15.4
-10
10.7
12.6
14.9
17.3
18.5 -5
14.4
16.0
17.9
19.9
21.6
18.1
19.4
20.9
22.3 - 5
20.5
21.2
22.1
22.5

33. IZFI Copeland Scroll™ Indoor CDU
Pressure Cut Out Settings
Refrigerant
Maximum Condensing Temperature LP
Cut Out
Cut In
R404A
60⁰C
1.0 Bar
2.7 Bar
Refrigerant
Minimum Evaporating Temperature HP
Cut Out
Cut In
R404A
-40⁰C
29.6 Bar
24.1 Bar

34. CoreSense

35. CoreSense™ Protects The Compressor
CoreSenseTM Module
Overview
CoreSense™ Protects The Compressor By
Controlling The EXV
Monitoring Discharge Line Temperature & Protects Compressor
Monitoring Demand Signal From LP & Thermostat
CoreSense™ Protects The Compressor

36. CoreSense™ Protects The Compressor
CoreSenseTM Module
Overview
The Board Will Be Used To Turn Off/On Compressor Based On Demand Signal From
Low Pressure Switch And Thermostat. The Board Will Control Vapour Injection Through An EXV Based On A Temperature Sensor Placed On The Discharge Line.
The Board Had Two Modes To Control Vapour Injection
Manual Mode
Automatic Mode
CoreSense™ Protects The Compressor

37. Customer Alarm 220VAC Or 5VDC
CoreSenseTM Module
IP54 Rating Box
Glands
Control Board
Transformer
Terminal Block
Wiring 1 6 2 14 3 15 7 15 15 15 4 8a 5 8b 13 12 11 10 9
No.
I/O
Description 1
Input
Power Supply (12VAC) 2
Thermostat /LP Switch (220VAC) 3
Reserved 4
Output
Contactor Coil (220VAC) 5
Customer Alarm 220VAC Or 5VDC 6
EXV Control 7
DLT Sensor
No.
I/O
Description 8a
Input
Vapour Inlet Temp Sensor 8b
Output
Vapour Outlet Temp Sensor 9
EXV Manual Operation 10
Communication Port
11,12 13
Setting Dip Switches 14
Program Loading Port 15
LEDs

38. CoreSenseTM Module Board Identification Connect To Vapour Inlet
Temp sensor
DLT Sensor
EXV Driver
Connect To Vapour Outlet
Temp sensor UP
LED3
LED2
DOWN
RESET
LED1
SW3
LED4
SW2
SW1
Board Power Supply
Input Terminals
(From 12VAC Transformer
Dry Contact – Alarm
Output Terminal
Compressor
Contactor
Demand
Reserved

39. CoreSenseTM Module Parameter Settings SW3 SW2 SW1
SW1,SW2 & SW3 Are Used To Set Functions For The Control Board
SW1 Is Used To Set Parameters Associated With Discharge Temperature Settings
SW2 Bit-1 Is Used For Lock Out Function Enable Setting
SW2 Bit-2 Is Used For Vapour Superheat Target Value Setting
SW3 Bit-1 Is Used For Compressor Minimum Stop Time Setting
SW3 Bit-2 Is Used For Liquid / Vapour Injection Control Settings SW
Bit 1 Setting
Bit 2 Setting
SW1 ON
SW2
OFF
SW3
SW3
SW2
Button
Function Up
To Operate EXV Manually
Down
Reset
Resets The Board
SW1

40. CoreSenseTM Module Manual / Auto Mode
Push “UP” & “DOWN” Together For 5 Seconds To Shift Between Control Mode & Auto Mode
LED2 & LED3 Flashing Together Once Means The Shift Is Successful
Operation: Operate EXV Manually
Short Push (<2s) “UP” or “DOWN” To Open Or Close EXV By One Step
Long Push “UP” or “DOWN” To Open & Close EXV Rapidly
LED2 Will Flash When EXV Is Opening & Will Turn ON When EXV Is Fully Open
LED3 Will Flash When EXV Is Closing & Will Turn ON When EXV Reaches Minimum Opening
Opening
Fully Open
Opening
Fully Open
LED2
LED3
LED2
LED3
LED2
LED3
LED2
LED3
Flash
Flash
OFF ON
OFF
OFF
OFF ON

41. CoreSenseTM Module LED Description LED3 LED2 LED1 LED4 LED Display
(Yellow Green)
LED Blinking Pattern Indicates DLT Sensor Status 2
LED2 & LED3 Combination 7 Blinking Patterns Indicate EXV Opening or Closing
LED2 & LED3Blink Once When Entering Or Exiting EXV Manual Mode 3 4
(RED)
LED 4 Turns ON As an Alarm When Triggered By Any Of The Following
DLT Overheat Protection
DLT sensor Failure
Vapour Inlet Sensor Fail Under Vapour Injection Control Mode
Vapour Outlet Sensor Fail Under Vapour Injection Control Mode
LED3
LED2
LED1
LED4

42. CoreSenseTM Module Diagnostic Function Of The Board ON OFF
LED1: Status Indicator Of Discharge Line Temperature Sensor
LED4: Warning Signal
Flash
Flash
5 Seconds
Repeat ON
OFF
Warning
Normal
No. Of Times
No. Of Times
Overheat Protection
Sensor Failure, Circuit Open/Short
CoreSense Controller Trip Set Points & Actions
Sensor fault Description
LED1 Behaviour
Compressor Idle Status/Waiting To Start
Blinks at 1Hz
Discharge Line Temperature Over-heating
Blinks 2 Times at 1Hz, Waiting 5s, Then Repeat
DLT Failure
Blinks 3 Times at 1Hz, Waiting 5s, Then Repeat
Vapour Inlet Temperature Sensor Failure (Vapour Mode)
Blinks 4 Times at 1Hz, Waiting 5s, Then Repeat
Vapour Outlet Temperature Sensor Failure (Vapour Mode)
Blinks 5 Times at 1Hz, Waiting 5s, Then Repeat

43. CoreSenseTM Module Fault Type/Sensor Faulty Description Trip Set Point
CoreSense Control
Actions
Resets
Possible Error & Solutions
Compressor Idle Status/Waiting To Start
N/A
LED 1 Blinks at 1 HZ
Discharge Line Temperature Over-Heating
Discharge Line
Temperature Over 110⁰C
(DLT Trip=DLT Target + 15K
For 10 Seconds, 95+15=110⁰C
Stop The Unit
LED1 Blinks 2 Times at 1Hz, Waiting 5s Then Repeat
After 10s Of The Trip; If Discharge Line Temperature >110⁰C Wil Execute The Compressor Stop Logic.
Lockout Unit If 6 Trips In Less Than 1 Hour
Initiate Buzzer/Dialler Relay
LED4 Will Turn On.
5 Auto Starts In One Hour
Check if Liquid Line Sight Glass Is Full: check Whether EXV Is Functioning & Connected To Control Board
DLT Failure KΩ
Reads Temperature Range
0-150⁰C
Open sensor Resistance >
1000Ω
Short Sensor Resistance<
400Ω
LED1 Blinks 3 Times at 1Hz, waiting 5s, Then Repeat.
LED4 Will Turn on
Continue To Run The Unit On Default Mode
Run
Check Whether The sensor Is Connected To Control Board
Check Whether The Sensor Is Mounted In Correct Position
Check Whether The Sensor is In Heat Isolation Material
Check If DLT Found Open/Short/Out Of Temperature range

44. CoreSenseTM Module Fault Type/Sensor Faulty Description Trip Set Point
CoreSense Control
Actions
Resets
Possible Error & Solutions
Vapour Inlet Temp sensor Failure
(Vapour Mode)
Reads Temperature Range
20-75⁰C
Open sensor Resistance >
500Ω
Short Sensor Resistance<
LED1 Blinks 4 Times at 1Hz, waiting 5s, Then Repeat.
Initiate Buzzer/Dialler Relay
LED4 Will Turn on
Continue To Run The Unit On Default Mode
Run
Check Whether The sensor Is Connected To Control Board
Check Whether The Sensor Is Mounted In Correct Position
Check Whether The Sensor is In Heat Isolation Material
Check If VOI Sensor Open/Short/Out Of Temperature range
Vapour Outlet Temp sensor Failure
LED1 Blinks 5 Times at 1Hz, waiting 5s, Then Repeat.

45. THANK YOU