Emerson Alco Controls CS1 Series Operating Instruction

G e n e r a l i n f o r m a 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 t y i n s t r 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 t i o n :
• Any direction except upside down.
I n s t a l l a t i o n ( F i 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 u r e c o n n e c t i o n ( F i 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.
Emerson Climate Technologies GmbH
Am Borsigturm 31 I 13507 Berlin I Germany
Operating instruction
Pressure Controls Series CS1
P r e s s u r 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
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 n e 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 m e 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.
www.climate.emerson.com/en-gb
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.
equipment directive
S e r v i c e / M a i n t e n a n c e :
• Defective CS1 must be replaced, they cannot be
repaired.
T e c h n i c a l d a t a :
Protection class
(IEC 529/EN 60529)
Ambient temperature
(housing)
Max. relative humidity
Storage / transportation
temperature
Medium temperature TS
Vibration resistance
(acc. EN12263)
Electrical rating
Resistive load (AC1)
Inductive load (AC15)
Inductive load (DC13)
Use proper fuse for short circuit case by considering
above voltages/currents
Medium compatibility
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:
•
•
T y p e c o d e :
CS1–
e.g.CS1- W 6 A
 Function
W = High Pressure limiter, automatic,
 Pressure range
Pressure setting
range
6 = 10...45 bar
7 = 15...65 bar
Pressures are relative (gauge pressure).

Pressure connection (Fig. 3)
A=7/16"-20 UNF male
CS1_OI_EN_DE_FR_ES_IT_RU_0320_R03_866914.docx
-25°C...+70°C
95% non-condensing
-50°C...+70°C
-25°C...+150°C
1g (10...150 Hz)
24A / 230V AC
10A / 230V AC
0.1A / 230V DC
144A / 120 / 240 VAC
24A / 120 / 240 VAC
R744, R410A
0035 marking for devices under PED
marking for devices under LVD
  
TÜV/ EN12263 approval (PSH)
Max. allowable Test Pressure
Pressure (PS) (PT)
70 bar 77 bar
70 bar 77 bar
Date: 06.03.2020
IP33