Operating instruction
Pressure Controls Series CS1
Emerson Climate Technologies GmbH
Date: 06.03.2020
Am Borsigturm 31 I 13507 Berlin I Germany
CS1_OI_EN_DE_FR_ES_IT_RU_0320_R03_866914.docx
G e n e r a l i nf o r ma t i o n :
For application in refrigeration systems in compliance
with standard EN 378.
A professional and appropriate storage and allocation
of the devices is mandatory.
S a f e ty i n s tr u c t i o n s :
•
Read operating instructions thoroughly. Failure
to comply can result in device failure, system
damage or personal injury.
•
According to EN 13313 it is intended for use by
persons having the appropriate knowledge and
skill.
•
Before opening any system make sure pressure in
system is brought to and remains at atmospheric
pressure.
•
Before installation or service disconnect all
voltages from system and device.
•
Do not exceed the specified maximum ratings for
pressure, temperature, voltage and current.
F u n c t i o n :
•
CS1 Pressure switches are equipped with SPDT snap
action contacts switching from 1-2 to 1-4 on rising
and from 1-4 to 1-2 on falling pressure. Reaching the
preset switch point on rising pressure, contact 1-2
opens while contact 1-4 closes and vice versa on
falling pressure.
Fig.1
M o u n t i n g d i r e c ti o n :
•
Any direction except upside down.
I n s t a l l a t i o n ( Fi g . 2 &4 ) :
•
CS1 may be installed by using a mounting plate or as
a wall-mounted device against a flat surface.
•
Use universal thread M4 or UNC8-32 mounting
holes for installation via mounting plate.
•
Use the standard mounting holes at the backside for
wall mounting.
•
Use mounting screws supplied with control.
•
Mounting screws must not penetrate control backside
by more than 8 mm to ensure proper operation.
•
Do not use CS1 in pulsating operating conditions!
Minimize vibrations in the piping lines by
appropriate solutions.
•
In order to achieve protection class IP33, the
following instructions must be observed:
-
Cover must be closed and cover screw fastened.
-
Control must be mounted against a flat surface so
that all openings on the housing backside are fully
covered.
-
Cable grommet (Fig.4, No.5) is sealing the cable
entry to the housing
P r e s s ur e c o n ne c t i o n ( Fi g . 3 ) :
•
Do not apply torsional load to pressure connector;
use second spanner to counter-balance torque when
tightening pressure connection. High pressure
versions are equipped with a snubber to dampen
pulsations.
•
When connecting CS1 to the hot gas line of a
refrigeration system, a pipe or high-pressure hose of
at least 80 mm shall be used to allow sufficient
temperature drop between refrigeration line and
pressure switch bellows.
P r e s s ur e t e s t :
After completion of installation, a test pressure must be
carried out as follows:
-
according to EN378 for systems which must comply
with European pressure equipment directive
2014/68/EU
-
to maximum working pressure of system for regions
out of Europe
Warning:
•
Failure to do so could result in loss of refrigerant
and personal injury.
•
The pressure test must be conducted by skilled
persons with due respect regarding the danger
related to pressure.
T i g h t n e s s t e s t :
Conduct a tightness test according to EN 378-2 with
appropriate equipment and method to identify leakages
of external joints. The allowable leakage rate must be
according system manufacturer’s specification.
E l e c t r i c a l c o n ne c t i o n :
•
Entire electrical connections have to comply with
local regulations.
•
Wire size must match the electrical load
connected to the switch contacts.
•
Feed cables through rubber grommet at switch
bottom (Fig.4, No.5).
•
Optionally, the rubber grommet may be replaced by
a standard PG 13.5 cable gland.
•
Connect wires to terminals (Fig.4, No.3) by taking
into account switch functions as shown in Fig.1
•
Fasten terminal screws with torque 1.2 Nm max.
•
Warning: CS1 might not be suitable for
connection to electronic controllers with low
electrical loads (voltage <24 V and current
<50 mA).
S e t p o i n t a d j u s t me n t ( F i g . 4 & 5 ) :
•
CS1 pressure switches come with individually
adjustable range and differential depending on the
exact model.
•
Use a flat screw driver or a ¼” refrigeration (square)
wrench to adjust setpoints as described below.
•
Adjust upper setpoint using the range spindle (Fig.4,
No.1).
•
Adjust lower setpoint by turning the differential
spindle (Fig.4, No.2).
Upper setpoint – Differential = Lower setpoint
Fig.5a/5b
(1) Upper setpoint
(5) Upper setpoint
(2) Lower setpoint
(6) Lower setpoint
(3) Differential
(7) Differential = variable
(8) Turning range spindle
(9) Turning differential spindle
•
A separate accurate gauge must be used for exact
adjustment of the setpoints. The integrated display
scale can only be used for obtaining approximate
settings. Maximum cut-out level must be as follows:
-
System with single protection device: At PS of
system minus tolerances.
-
System with two individual protection devices: At
0.9*PS of system.
•
When changing the upper setpoint the lower setpoint
must be re-checked.
•
Refer to the Technical Bulletin for standard factory
settings.
C h e c k- o u t l e v e r ( F i g . 4 , N o . 4 ) :
•
Use the check-out lever to manually override the
electrical contact position for testing out the system.
S e r v i c e / Ma i n t e na n c e :
•
Defective CS1 must be replaced, they cannot be
repaired.
T e c h ni c a l d a ta :
Protection class
(IEC 529/EN 60529)
IP33
Ambient temperature
(housing)
-25°C…+70°C
Max. relative humidity
95% non-condensing
Storage / transportation
temperature
-50°C…+70°C
Medium temperature TS
-25°C…+150°C
Vibration resistance
(acc. EN12263)
1g (10...150 Hz)
Electrical rating
Resistive load (AC1)
Inductive load (AC15)
Inductive load (DC13)
24A / 230V AC
10A / 230V AC
0.1A / 230V DC
144A / 120 / 240 VAC
24A / 120 / 240 VAC
Use proper fuse for short circuit case by considering
above voltages/currents
Medium compatibility
R744, R410A
Standards:
•
EN 12263
•
PED 2014/68/EU, Category IV for all devices
with TÜV approval under EN12263
•
LVD 2014/35/EU, EN 60947-1, EN 60947-5-1
Marking:
•
0035 marking for devices under PED
•
marking for devices under LVD
T y pe c o d e :
CS1–
e.g.
CS1- W 6 A
Function
W = High Pressure limiter, automatic,
TÜV/ EN12263 approval (PSH)
Pressure range
Pressure setting
range
Max. allowable
Pressure (PS)
Test Pressure
(PT)
6 = 10…45 bar
70 bar
77 bar
7 = 15…65 bar
70 bar
77 bar
Pressures are relative (gauge pressure).
Pressure connection (Fig. 3)
A=7/16”-20 UNF male
