Danfoss KP 21 User manual

Installation guide
Pressure switch
Type KP 21
© Danfoss A/S (AC-MCI / jmn), 2013-11 IC.PI.P10.G3.02 / 520B5881 1
060R9410 060R9410
Ambient temperatures
Caution: Do not mount a switch in a position where
dirt, sediment or oil will aect the operation of the switch.
Enclosure
CAUTION: The mounting panel must be plane to avoid damage of switch.
Low pressure (LP) side setting
CUT-IN minus DIFFERENTIAL equals CUT-OUT
Test pressure (p test)
High pressure (HP) side setting
CUT-OUT minus DIFFERENTIAL equals CUT-IN
Ptest max.
20 bar Pe
Ptest max.
20 bar Pe
LP HP
1. Adjust range spindle to
desired CUT-IN value
2. Adjust dierential
spindle to desired
DIFFERENTIAL
(DIFF.) value
LP
scale
1. Adjust range spindle to
desired CUT-OUT value.
2. DIFFERENTIAL (DIFF.)
is xed.
Value printed on scale plate.
tlmin. −40°C (−40°F)
−25ºC (−13ºF)
tl max 65ºC (150ºF)
HP
scale

2 IC.PI.P10.G3.02 / 520B5881 © Danfoss A/S (AC-MCI / jmn), 2013-11
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 ngers or with any tool.
Controls with low pressure (LP) and
high pressure (HP) signal
Terminal block
Contact load
Alternating current:
AC 1: 16 A, 400 V
AC 3: 16 A, 400 V
AC15: 10 A, 400 V
Max. starting current (L.R.): 112 A, 400 V
Direct current:
DC13: 12 W, 220 V control current
Function
Note!
= Load
= Signal option
= Bellows movement on pressure rise
= Bellows movement on pressure drop
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
M
X