Installation guide
Pressure switch
KPU
06
0R
976
7
06
0R
976
7
© Danfoss | DCS (jmn) | 2016.11
DKRCC.PI.CD0.F4.22 | 520H11543 | 1
Application
KPU pressure switches are for use on commercial
refrigeration and air conditioning systems to give protection
against excessively low suction pressure or excessively
high discharge pressure.
They are also used for starting and stopping refrigeration
compressors and fans on air-cooled condensers.
KPU pressure switches are fitted with the Single-Pole Single-
Throw (SPST) or Single-Pole Double-Throw (SPDT) switches,
suitable for direct as well as indirect (with a contactor) control.
KPU pressure switches are available in several pressure ranges
and are compatible with refrigerants listed below. KPU 6W and
KPU 6B are fail safe switches for high pressure refrigerants.
Standard enclosure is ~NEMA 1.
Product Specification
Application
Type
Code number
Reset
Contact system
Regulating
range
[inHg] [psig]
Differential
∆p
[psi]
Max.
working
pressure
[psig]
Max.
testing
pressure
[psig]
Ambient
temp.
[°F]
¼ in
male flare
36 in. cap.
tube w. ¼
in flare nut
Type
Switch
action
Low Pressure
Switch Cut Out
on pressure
fall
KPU 1
060-5231
060-5233
Auto.
SPDT
—
6 in. – 108
10 – 60
250
290
-40 – 122
(175 for
max.
2 hours)
KPU 1
060-5236
—
Auto.
SPST(NO) close High open Low
6 in. – 108
10 – 60
250
290
KPU 2
060-5237
060-5235
Auto.
SPST(NO) close High open Low
6 in. – 73
6 – 30
250
290
KPU 2
060-5239
060-5240
Auto.
SPDT
—
6 in. – 73
6 – 30
250
290
KPU1B 060-5232
060-5234
Man (Min.)
SPDT
—
28 in. – 100
10 fixed
250
290
Fan switch
KPU 5
060-5241
060-5242
Auto.
SPST(NO) close High open Low
100 – 465
25 – 85
510
530
High Pressure
Switch
Cut Out on
pressure rise
KPU 6W 060-5243
060-5245
Auto.
SPDT
—
100 – 600
58 – 145
675 / 610*
725
KPU
6B
060-5244
060-5246
Man. (Max.)
SPDT
—
100 – 600
60 fixed
675 / 610*
725
* 610psig - MWP for products used according to 97/23/EG PED directive.
Refrigerants:
R22, R134a, R404A, R407A, R407C, R407F, R410A*), R422B,
R422D, R438A, R448A, R449A, R450A, R452A, R507A, R513A
For complete list of approved refrigerants, go to
http://products.danfoss.com/all-products/
*) R410A only for KPU 6W and KPU 6B
Installation
Select an accessible location, where the switch and pressure connection line will not be subject to damage.
IMPORTANT:
Mount the pressure switch in a position that
will allow drainage of liquids away from switch
bellows. Pressure connection of the switch
must always be located on the top side of the
refrigerant line.
This reduces the possibility of oil, liquids, or
sediment collecting in the bellows, which could
cause the switch malfunction.
IMPORTANT:
Ensure the ambient temperature for the pressure
switch is higher than the refrigeration line as that
will prevent liquid migration and accumulation in
the bellows.
