Emerson PS4 Serie Instrucciones De Funcionamiento

G e n e r a l i n f o r m a t i o n :
For application in refrigeration systems and heat pumps
according to 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.
• Do not release any refrigerant into the
atmosphere!
• Do not exceed the specified maximum ratings for
pressure, temperature, voltage and current.
• Before installation or service disconnect all
voltages from system and device.
• Ensure that design, installation and operation are
according to European
standards/regulations.
S e t t i n g :
PS4 Pressure switches are factory preset to a specific
value (see label).
F u n c t i o n / T y p e o f s w i t c h ( F i g . 1 , 2 ) :
Fig. 1: Pressostat with automatic reset (NC, NO and
SPDT):
NC NO
SPST SPST
+ +
P P
- -
Fig. 2: High pressure cut-out (manual reset)
NC NO
+ +
P P
-
-
PS4 with automatic reset:
PS4 Pressure switches are equipped with snap action
contacts opening or closing on falling or rising
pressure. Depending on model they are equipped with
single pole single through (SPST) or single pole
double through contacts (SPDT).
PS4 with manual reset (HP only):
Reaching the preset switching point contacts open or
close and latches. After the pressure drops by appr. 4-8
bar depending on pressure setting (high pressure switch
only) the switch can be reset by pushing the reset
button.
I n s t a l l a t i o n :
• PS4 Pressure switches should not be exposed to
pulsations. Use a pulsation damper or a capillary tube
connection (min.1m) when pulsations can be
expected.
M o u n t i n g l o c a t i o n : a n y
Emerson Climate Technologies GmbH
Am Borsigturm 31 I 13507 Berlin I Germany
Operating instructions
Pressure Controls Series PS4
P r e s s u r e c o n n e c t i o n :
Threaded connection:
• Use pulsation damper and high temperature
diaphragm for direct compressor mounted high
pressure applications.
• Do not apply torsional force to switch housing
assembly during assembly
(1) = Copper gasket
Fig.3:
Brazing:
• Perform and consider the brazing joint as per
EN 14324.
• Before and after brazing clean tubing and brazing
joints.
• Do not exceed the max. body temperature of
and national
70°C!
SPDT
+
Fig.4:
P
-
P r e s s u r e T e s t :
After completion of installation, a pressure test must be
carried out as follows:
- according to EN 378 for systems which must
comply with European pressure equipment
directive 14/68/EU.
- to maximum working pressure of system for other
applications.
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.
E l e c t r i c a l c o n n e c t i o n :
Note: Comply with local electrical regulations when
wiring PS4. To maintain protection class, proper
installation is mandatory.
Service / Maintenance:
In case of repair work or replacing the control always
use new gasket Fig 3 (1).
www.climate.emerson.com/en-gb
T e c h n i c a l D a t a :
Protection class
(IEC 529/ DIN 40050)
Ambient temperature
(housing)
Storage / transport
temperature
Medium temperature
Vibration resistance
Pressure range
Series PS4
all except:
PS4-B
PS4-B
Electrical rating
PS4-
A, W
B
For electronic applications with low electrical loads
(current <100 mA) standard contacts are not suitable.
The use of gold plated contacts is recommended.
Type
Gold contact 5...24V):
Medium
compatibility
Marking
according Low Voltage Directive and
ENEC05
0035 according to Pressure Equipment
Directive 2014/68/EU
according Electrical Equipment Directive
2014/35/EU
file No. E258370
PS4 - ① ②
T y p e c o d e :
① Function
e.g. PS4 – A
A Pressure controls, automatic, high pressure or
low pressure
W Pressure limiters, automatic, type approval acc.
EN 12263, (Definition term by EN12263 &
EN378: PSL/PSH)
B Pressure limiters, external manual reset (by
② Electrical connection
hand); type approval, acc. EN 12263,
(Definition term by EN12263 & EN378: PZH)
1 Normally closed silver contact with molded
cable
2 Normally open silver contact with molded cable
3 Normally closed silver contact with quick
connector; QC (for push-on spades)
4 Normally open silver contact with quick
connector, QC (for push-on spades)
5 Normally closed gold-plated contact with
molded cable
L Normally closed silver contact with molded
cable suitable for manual rest
Date: 10.04.2019
IP67
IP20 (Terminal Connection)
-40...+65°C
-40...+65°C
-40...+13°C
4g (10...250 Hz)
Operating Test
Setting
pressure PS pressure PT
(bar) (bar) (bar)
0 < 6.9 22.7 25
7 - 27.6 37 41
27.7 - 38 50 55
38.1 - 50 63 69
13.8-27.6 37 41
27.7 - 38 50 55
38.1 - 50 63 69
Ampere
230V AC <28V DC LRA
Ind. Ind.
6 2 36
6 2 15
A W B
25-250 mA -
HFC, HCFC, HFO.
HFO blends,
Mineral-. Synthetic-. POE-
Lubricant
1
PS4_OI_ML_R04_865025.docx