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Emerson Climate Technologies
20
Electronic Valves & Controls
Emerson Climate Technologies
COMPONENT
APPLICATION
TXV
LIQUID
INJECTION
HOT
GAS
HEAD
PRESSURE EPR CPR
KEYPAD (ECD-002) YES NO NO NO NO NO
LAPTOP * NO NO NO NO NO
TEMP SENSOR (ECN-N60) YES NO NO NO NO NO
PRESSURE TRANSDUCER (PT4) YES NO NO NO NO NO
CONTROLLER (EC3-X33) YES NO NO NO NO NO
CONTROLLER (EC3-X32) * NO NO NO NO NO
AUXILLARY CONTROLLER ** NO YES YES YES YES YES
DRIVER (EXD-U00) NO YES YES YES YES YES
VALVE (EX) YES YES YES YES YES YES
COMPONENT SELECTION TABLE
* Optional
** 3rd party (Emerson does not offer an auxillary controller)
Electronic Valves Programming
Programming Emerson TXV Controller (5):
1) Enter specic data using keypad or laptop com-
puter (i.e. refrigerant, tonnage, superheat, etc.).
3) Driving of stepper motor
There are many different options to drive stepper
motors like the one used in the EX4/5/6/7/8. Emerson
stepper motors need a driver board with chopper drive
function (constant current), an interface and a controller.
Chopper drive (constant current)
The stepper motor of EX4/5/6/7/8 is a bipolar, 2-
phase permanent-magnet motor and operates with
constant DC current in each phase.
3
6
2
5
1
9
6
7
8
4
10
1 Stainless steel body
2 Stepper motor
3 Electrical connector
4 Cage assembly
5 Shaft
6 Welding and/or brazing
7 Ceramic inlet port
8 Ceramic slide
9 Ceramic outlet port
10 Brass ball
Programming a 3rd Party Auxillary Controller (6):
1) Follow manufacturers additional instructions.
NOTE: The keypad (1) cannot be used to program
these auxillary controllers.
EX VALVE
CUTAWAY VIEW
- Technical 1
- Help Guide 1
- Introduction 3
- Table of Contents 4
- Thermal Expansion 5
- Thermal Expansion Valves 6
- Internal Equalizer 6
- Factory Settings of TXVs 7
- External Equalizer 7
- Superheat 9
- Approximate Methods 9
- Superheat Adjustment 9
- TXV Selection 10
- Application Tips 11
- Remote Bulb Well 11
- Remote Bulb Location 11
- Operation at Reduced Capacity 12
- Gas & Gas Cross-Charges 14
- Which Charge to Use? 14
- Adsorption Charges 14
- Liquid Cross-Charges 14
- Other TXV Considerations 15
- Refrigerant Code Names 16
- Emerson MOP 16
- TXV Charge Code Selector 17
- Electronic Valves 18
- & Controls 18
- Electronic Valve Applications 19
- Emerson Climate Technologies 20
- EC3-32 and EC3-33 Systems 20
- Temperature Sensor ECN-N60 20
- Pressure Transmitter – PT4 21
- TXV Controller – EC3-X32 21
- TXV Controller – EC3-X33 22
- Universal Driver – EXD-U00 22
- XEV22 Superheat Controller 22
- Electrical Control Valve – EX 23
- Third Party Controller 23
- Electronic Valves Programming 24
- Solenoid Valves 25
- What Are Solenoid Valves? 26
- 2. Pilot Operated Valve 27
- Types of Solenoids 27
- 2-Way Valves 27
- Solenoid Valve Selection 28
- Application Overview 29
- System Protectors 30
- Absorption vs. Adsorption 32
- Types of Filter driers 32
- Dirt, Waxes, Acid 32
- Sightglass 33
- Suction Filter Driers 34
- Internal Design 35
- Compressor Burnout 36
- Filter Driers for Heat Pumps 37
- Removing Contaminants 37
- One-Way Flow, Both Directions 37
- Simplifying While Servicing 38
- Emerson System Protectors 38
- Regulators 39
- EVAPORATOR 40
- INTERMEDIATE 40
- Figure 3: EPRB(S) Brass Body 41
- (Emerson EPRB) 42
- HeadMaster HP Operation 43
- solenoid VAlVe 46
- Figure 8 47
- Adjusting the Set Point 48
- Oil Controls 49
- Emerson Oil Controls 50
- Temperature 51
- Pressure Controls 51
- Temperature Pressure Controls 52
- TS1 Introduction 52
- Housing Variants 52
- Temperature Sensing 52
- Setpoints 53
- Electrical Contacts 53
- Contact Function 53
- PSC Pressure Switch 56
- PSC Introduction 56
- FSX Introduction 57
- Basic Rules of 58
- Good Practice 58
- Basic Rules of Good Practice 59
- Troubleshooting 61
- SYSTEM TROUBLESHOOTING GUIDE 62
- No Superheat At Start Up Only 63
- Superheat Is Erratic Or Hunts 63
- Troubleshooting Ball Valves 68
- Troubleshooting Regulators 69
- R404A/R507A 70
- Wholesaler/Contractor Support 72
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