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System Protectors
Emerson Climate Technologies
Bi-directional components allow simplication of system
Cross section showing BFK internal components
Simplifying While Servicing
When servicing or repairing heat pump systems,
especially older units, it’s a good idea to simplify them
by replacing unidirectional driers and check valves with
bi-directional driers. When a bi-directional lter drier
is installed, check valves, and lter driers can all be
replaced at once with copper tubing.
Refrigerant ow either direction passes from
outside to inside of desiccant core
Emerson System Protectors
Emerson lter driers were redesigned for increased
water removal capacity to reach these low moisture
levels. However, since no system is entirely without
water on startup some organic acids will be generated
and must be removed. The desiccant formulation for
the Emerson EK series of lter driers was designed to
provide the best mix of water capacity and acid capacity
to ensure that harmful contaminates are removed. This
desiccant mixture contains molecular sieve and activat-
ed alumina. The molecular sieve is specically designed
to provide maximum drying in today’s systems. The
activated alumina is ideal for capturing the large organic
acids that the molecular sieve cannot.
Replace two check valves and two
expansion valves with one EMERSON
Bi-directional Thermal Expansion V
alve
Expansion Device
Filter-Drier
Check Valve
Check Valve
Filter-Drier
Expansion Device
Remove both filter-driers &
replace each with a piece of
copper tube
Install One BFK
in a convenient
Location in Common
Liquid Line
Emerson
Suction Line
Filter-Drier
Emerson
Discharge
Muffler
Emerson 4-way
Reversing Valve
Compressor
Molded Desiccant Block
Inlet
Flapper
Valve
Outlet
Poppert
Valve
Outlet
Poppert
Valve
Inlet
Flapper
Valve
Inlet
Flapper
Valve
Inlet
Flapper
Valve
Steel Retaining Screen
Steel Retaining Screen
Final Filter Pad
INTERNAL
CONSTRUCTION
BASIC FLOW
PA
TTERNS
Heating
Cycle
Cooling
Cycle
- 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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