Danfoss Pressure Switch Installation Guide
KP 15, KP 15A, KP 17W, KP 17B, KP 17WB, KP 47WB
Refrigerants
R22, R134a, R404A, R407A, R407C, R407F, R422B, R422D, R448A, R449A, R450A, R452A, R507A, R513A, R717*)
For a complete list of approved refrigerants, visit: http://products.danfoss.com/all-products/
*) only for KP 15A
Ambient Temperatures / Mounting Requirements
- t₁ min. KP 15: -40 °C (-40 °F)
- t₁ min. KP 17, KP 47: -25 °C (-13 °F)
- t₁ max.: 65 °C (149 °F)
Relative humidity RH: 30 – 98%
Vibrations resistance: 4 g (10 – 1000 Hz)
Test Pressure (Ptest)
LP: Ptest max. 35 bar (510 psig) - KP 15, KP 17
HP: Ptest max. 24 bar (343 psig) - KP 47
Pressure Ranges and Max. Working Pressure
| Type | Regulation range | Max. working pressure PS/MWP |
|---|---|---|
| KP 15 | LP: -0.2 – 7.5 bar HP: 8 – 32 bar |
17 bar/245 psig 35 bar/510 psig |
| KP 15 LP man. | LP: -0.9 – 7 bar HP: 8 – 32 bar |
17 bar/245 psig 35 bar/510 psig |
| KP 17 | LP: -0.2 – 7.5 bar HP: 8 – 32 bar |
17 bar/245 psig 32 bar/464 psig |
| KP 47 | LP: -0.2 – 7.5 bar HP: 8 – 32 bar |
21.5 bar/312 psig 32 bar/464 psig |
Connections
LP side: A-C opens on pressure drop
HP side: A-C opens on pressure rise
Diagram Description: Shows connections for KP 15A with a 7/16-20 UNF (1/4 in SAE flare) connection and for KP 15, KP 17 with G1/4 A (ISO 7/1) and M10x0.75 connections. Includes dimensions for these connections.
Mounting
Diagram Description: Illustrates mounting options for the pressure switches, including a clamp for mounting on a pipe with a diameter of approximately 17 mm (11/16 in) or 14 mm (9/16 in). Also shows a mounting bracket for enclosures.
Max. 100 °C (212 °F)
Enclosure
Diagram Description: Shows two enclosure types: Type A with 8-32 UNC (M4) screws and Type B with IP30 rating. Also shows Type C enclosure with IP44 rating (EN 60529). A maximum of 3 mm (1/8 in) cable entry is indicated for Type A.
Electrical Rating - General
AC-1: 16 A, 400 V
DC-13: 12 W, 220 V
AC-3: 16 A
AC-15: 10 A, 250 V AC
Short circuit protection: Fuse 16 Amp
When used acc. to UL regulations
| Contacts | Voltage AC | Voltage DC | FL A | LR Resist. A | Pilot load A | Resist. load duty |
|---|---|---|---|---|---|---|
| A-B | 240 | - | 16 | 96 | 16 A | 8 A |
| A-C | 240 | - | 16 | 85 | 16 A | 8 A |
| A-D | 240 | - | - | - | - | 12 W |
Use copper wire only.
Tightening torque 20 lb. in.
Pressure Settings and Reset Functions
LP = Low Pressure
Diagram Description: Illustrates LP cut-in and cut-out points with a differential. Shows LP low pressure with a cut-in and differential cut-out, with a reference of -1 bar (Pe) (30 inHg).
LP, aut. reset
LP, man. reset
HP = High Pressure
Diagram Description: Illustrates HP cut-out and cut-in points with a differential. Shows HP high pressure with a cut-out and differential cut-in.
Convertible Reset
KP 15: LP/HP convertible, KP 17WB, KP 47WB: HP convertible
Diagram Description: Shows how to insert a screwdriver into the slot on the lock disc and turn it to the desired reset configuration. Advises not to turn the screw on the lock disc to avoid damaging the convertible reset mechanism.
Reset Options
Diagram Description: Presents various reset options: LP manual, LP auto, HP manual, HP auto. Includes a note advising against selecting automatic reset if system safety requires manual reset. Also notes that selected reset configuration can be protected against unauthorized actions by applying a seal.
Adjustment
Diagram Description: Shows adjustment ranges for LP and LP differential. LP adjustment is 360° with 0.7 bar (10 psi)/rev. LP differential adjustment is 360° with 0.15 bar (2 psi)/rev. HP adjustment is 360° with 2.3 bar (33.5 psi)/rev.
Safety Requirements
- KP pressure switches should only be used in units/systems complying with charge limit and ignition source avoidance requirements of IEC 60335-2-24, IEC 60335-2-40, IEC 60335-2-89, ISO 5149, EN378-1, or equivalent.
- Prevent overload on KPs. If damaged, stop the system/unit and replace the KP.
- Implement electrostatic discharge and electrical leakage protection through grounding or other measures.
- Only trained personnel with appropriate tools should handle flammable refrigerant systems for installation, maintenance, and exchange.
- Regularly check the function of the KP switch.
- Install KP pressure switches in areas with low risk of mechanical damage.
- Consider corrosion protection when used in corrosive environments.
- Cables should not contact sharp edges. Connect cables with adequate stress relief to prevent pulling forces on terminals.
- Dump pressure pulsation effectively to prevent bellows failure. Keep the cycle frequency of KP switches as low as possible.
- Do not install KP switches in areas with high vibration levels.
Disclaimer
Users are responsible for ensuring third parties comply with this notice, including providing installation guides with the switches. All conditions in this guide must be met and secured when using KP pressure switches.
Danfoss is not responsible for any direct or indirect damage, including loss of property, production, profit, or human injury, arising from explosion or fire caused by flammable refrigerants.
Information provided is for guidance only and is binding only if explicitly referenced in a quotation or order confirmation. Danfoss is not liable for errors in its publications and reserves the right to alter products without prior notice.
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