Installation guide
Pressure switch
KP 15, KP 17W, KP 17B, KP 25
Refrigerants:
R22, R134a, R404A, R407A, R407C, R407F, R422B, R422D, R448A, R449A, R450A, R452A, R507A, R513A
For complete list of approved refrigerants, go to http://products.danfoss.com/all-products/
KP 15, KP 17W, KP 17B, KP 25 Diagrams
KP 15 (man. (LP) / man. (HP) reset)
Diagram showing connections for KP 15 with manual low pressure and manual high pressure reset.
KP 15, KP 17B (auto. (LP) / man. (HP) reset)
Diagram showing connections for KP 15 and KP 17B with automatic low pressure and manual high pressure reset.
KP 15, KP 17W, KP 25 (auto. (LP) / auto (HP) reset)
Diagram showing connections for KP 15, KP 17W, and KP 25 with automatic low pressure and automatic high pressure reset.
CAUTION: Do not install these controls on ammonia systems.
Ambient temperatures / Mounting requirements
t₁ min.: -40 °F (-40 °C)
t₁ max.: -13 °F (-25 °C) (PED approved products)
t₁ max.: 149 °F (65 °C)
Test pressure (Ptest)
Diagram showing LP and HP connections with pressure gauges and maximum test pressures.
Ptest max. 510 psig (35 bar pe)
Ptest max. 285 psig (20 bar pe)
Enclosure
Diagram showing enclosure mounting details.
A: 10-32 UNC Threads (4 holes)
B: Enclosure ~NEMA1
CAUTION: Do not mount the control in a position where dirt, sediment, or oil will affect the operation of the control.
CAUTION: The mounting panel must be plane to avoid damage of control.
Diagram showing maximum allowable panel thickness for mounting.
max 1/8 in (3 mm)
Connections
Diagram showing various connection types including 1/4 in SAE flare and cable entry details.
Cable entry 1½ in int. thread accepts 1/2 in NPT or NPS
Assembly
Diagram showing the assembly of the pressure switch.
Wiring
CAUTION: Disconnect power supply before wiring connections are made or service to avoid possible electrical shock or damage to equipment. Do never touch live parts with your fingers or with any tool.
All wiring should conform to the National Electrical Code and local regulations.
SPDT Controls with low pressure (LP) signal
Terminal block
Diagram illustrating terminal block for LP signal option.
LP Signal option
Line
Controls with low pressure (LP) signal and high pressure (HP) signal)
Terminal block
Diagram illustrating terminal block for LP and HP signal options.
LP Signal option
HP Signal option
Max. 50VA
Contact load ratings
| Voltage | FLA | LRA |
| 120 V AC | 16 FLA, 96 LRA | |
| 240 V AC | 8 FLA, 48 LRA | |
| 240 V DC | 12 W pilot duty |
Function
Diagram illustrating LP signal function.
LP signal
Diagram illustrating LP + HP signal function.
LP + HP signal
Note!
M = Load
= Signal option
= Bellows movement on pressure rise
= Bellows movement on pressure drop
Wiring
CAUTION: Use terminal screws furnished in the contact block. Use tightening torque 20 lb. in (2.3 Nm). Use copper wire only.
Low pressure (LP) side:
A-C close on LP rise
A-C open on LP drop
High pressure (HP) side:
A-C open on HP rise
A-C close on HP drop
LP signal option:
A-B close on LP drop
HP signal option:
A-D close on HP rise
See label for current wiring inside cover.
Manual tripping (Electrical contacts/wiring test)
LP side
Diagram showing LP side contacts and positions.
Up
Down
Trip: use FINGERS ONLY! (Do NOT use screwdriver)
HP side
Diagram showing HP side contacts and positions.
Use screw driver only
Note: On controls with LP and/or HP man. reset, push corresponding LP and/or HP man. reset knob during tripping.
Manual reset
Diagrams showing manual reset operation.
To resume control operation after safety cut-out, push man. reset knob as indicated.
Note: LP man. reset is possible only after system pressure has risen above cut-in value.
Note: HP man. reset is possible only after system pressure has dropped below cut-out value.
Convertible reset
Diagram illustrating how to convert reset mechanism.
Insert a screwdriver into the slot on the lock disc and turn it to desired reset configuration. Do not turn the screw on the lock disc as it may damage the convertible reset mechanism.
Reset options
Diagrams showing different reset options: LP man./HP man., LP auto./HP man., LP auto./HP auto.
Note: Do not select automatic reset if safety of the system requires manual reset.
Note: Selected reset configuration may be protected against unauthorized actions applying a seal.
Adjustment spindle(s) location
Diagrams showing adjustment spindle locations for different models and reset types.
KP 15 (A. MAN./MAN. RESET)
Diagram showing LP and HP range and differential adjustment for KP 15 with manual/manual reset.
KP 15, KP 17B (B. AUTO/MAN. RESET)
Diagram showing LP and HP range and differential adjustment for KP 15 and KP 17B with auto/manual reset.
KP 15, KP 17W, KP 25 (C. AUTO./AUTO. RESET)
Diagram showing LP and HP range and differential adjustment for KP 15, KP 17W, and KP 25 with auto/auto reset.
Setting
Low pressure (LP) side setting
KP 15, KP 17W, KP 17B and KP 25 with LP auto. reset only
Diagram showing LP scale for range and differential adjustment.
1. Adjust range spindle to desired CUT-IN value.
2. Adjust differential spindle to desired DIFFERENTIAL (DIFF.) value.
CUT-IN minus DIFFERENTIAL equals CUT-OUT
Example:
CUT-IN = 30 psig, DIFF. = 10 psi, CUT-OUT = 20 psig (2.1 bar, 0.7 bar, 1.4 bar)
KP 15A with LP man. reset only
Diagram showing LP scale for range and differential adjustment.
1. Adjust range spindle to desired CUT-IN value.
2. DIFFRENTIAL (DIFF.) is fixed. Value printed on scale plate.
CUT-IN equals CUT-OUT plus DIFFERENTIAL
Example:
CUT-OUT + DIFF. = CUT-IN, 12 psig + 10 psi = 22 psig (0.8 bar + 0.7 bar = 1.5 bar)
KP 15A with convertible LP auto. man. reset
Diagram showing LP scale for range and differential adjustment.
1. Adjust range spindle to desired CUT-IN value.
2. DIFFRENTIAL (DIFF.) is fixed. Value printed on scale plate.
CUT-IN equals CUT-OUT plus DIFFERENTIAL
Example:
CUT-OUT + DIFF. = CUT-IN, 12 psig + 10 psi = 22 psig (0.8 bar + 0.7 bar = 1.5 bar)
High pressure (HP) side setting
KP 15, KP 17W, KP 17B and KP 25 with HP auto. or man. reset
Diagram showing HP scale for range and differential adjustment.
1. Adjust range spindle to desired CUT-OUT value.
2. DIFFRENTIAL (DIFF.) is fixed. Value printed on scale plate.
CUT-OUT minus DIFFERENTIAL equals CUT-IN
Example:
CUT-OUT - DIFF. = CUT-IN, 203 psig - 58 psi = 145 psig (14 bar - 4 bar = 10 bar)
Adjustment
LP range
Diagram showing how to adjust LP range.
Increase 360°: KP 15: 10 psi (0.7 bar)/rev, KP 25: 7 psi (0.5 bar)/rev
Decrease 360°
LP differential
Diagram showing how to adjust LP differential.
Increase 360°: KP 15: 2 psi (0.15 bar)/rev, KP 25: 1.5 psi (0.1 bar)/rev
Decrease 360°
HP range
Diagram showing how to adjust HP range.
Increase 360°: KP 15: 33.5 psi (2.3 bar)/rev
Decrease 360°
Note: Remove lockplate before adjustment. Replace lockplate after adjustment (if desired).
