Emerson PS4 Serie Betriebsanleitung

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.
The device has a potential ignition source and has not
been qualified according to ATEX standards. Installation
only in "non-explosive location".
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.
• This product is intended for use by qualified personnel
having the appropriate knowledge and skills like trained
according to EN 13313 or a specific training for
flammable refrigerants.
• Flammable refrigerants require special handling and
care due to its flammability. Sufficient ventilation is
required during service of the system.
• Contact with rapidly expanding gases can cause
frostbite and eye damage. Proper protective equipment
(gloves, eye protection, etc.) must be used.
• Ensure that the system is correctly labelled with applied
refrigerant type and a warning for explosion risk.
• In a severely contaminated system, avoid breathing acid
vapours and avoid contact with skin from contaminated
refrigerant / lubricants. Failure to do so could result in
injury.
• 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.
• Ensure that the system piping is grounded.
• Before installation or service disconnect all voltages
from system and device.
• Observe and avoid mechanical damage of housing in
order to maintain protection class.
• Do not use any other fluid media without prior approval
of EMERSON. Use of fluids not listed could result in
change of hazard category of product and consequently
change of conformity assessment requirement for
product in accordance with European Pressure
Equipment Directive 2014/68/EU.
• Ensure that design, installation and operation comply
with European and national standards/regulations.
• Do not operate system before all cable connections are
completed.
• For flammable refrigerants only use valves and
accessories approved for it!
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 : (Fig. 1,2)
Fig. 1:
Pressostat -
automatic reset
(NC/NO)
Fig. 2:
High pressure
cut-out (manual
reset)
T y p e C o d e :
Function
A
Pressure controls, automatic, high pressure or low pressure
W Pressure limiters, automatic type approval acc. EN 12263,
(EN 12263 & EN 378: PSL/ PSH)
R Pressure controls, external manual reset (by hand)
B Pressure limiters, external manual reset (by hand); type approval,
acc. EN 12263, (EN 12263 & EN 378: PZH)
Emerson Climate Technologies GmbH
Pascalstrasse 65 I 52076 Aachen I Germany
O P E R A T I N G I N ST RU C T I O N S
Pressure Controls Series PS4
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).
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 : any
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
applications.
• Do not apply torsional force to switch housing assembly
during assembly.
(1) = Copper
gasket
Brazing Connection:
• Perform the
brazing as per
EN 14324.
• Before and
after brazing
clean tubing
and brazing
joints.
• Do not exceed
the max. body
temperature of
70 °C!
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 2014/68/EU.
- to maximum working pressure of system for other
applications.
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
from joints and products. The allowable leakage rate must
be according system manufacturer's specification.
WARNING:
• Failure to pressure test or tightness test as
described could result in loss of refrigerant, damage
to property and/or personal injury.
• The tests must be conducted by skilled personnel
with due respect regarding the danger related to
pressure.
E l e c t r i c a l c o n n e c t i o n :
• Comply with local electrical regulations when wiring
PS4. To maintain protection class, proper installation is
mandatory.
PS4
Product Name
www.climate.emerson.com/en-gb
compressor mounted high
Fig. 3
- ⌂ ⌂
Electrical Connection
1 silver contact with molded cable, normally closed (NC)
2 silver contact with molded cable, normally open (NO)
3 silver contact with quick connector QC (for push-on spades), normally closed (NC)
4 silver contact with quick connector QC (for push-on spades),normally open (NO)
5 gold-plated contact with molded cable, normally closed (NC)
L silver contact with molded cable suitable for manual reset, normally closed (NC)
• Ensure that the cables are mounted without tension;
always leave the cable a bit loose.
• Ensure that cables are not mounted near sharp edges.
• Do not bend or mechanically stress the cable outlet,
maintain a clearance of 20 mm to neighbouring parts.
O p e r a t i o n :
• Perform a functional test of electrical circuit before
charging the system with refrigerant.
S e r v i c e / M a i n t e n a n c e :
• Disconnect electrical power before service.
• Defective PS4 must be replaced, they cannot be
repaired.
• Disconnection of electrical plug (QC version) from device
only when the power is switched off.
• Before any debrazing ensure that the flammable
refrigerant is pumped out of the system and the room
around the system is well vented so no refrigerant left.
• According to EN 378-4
maintenance, tightness tests shall be carried out at the
pressure
relevant part of the refrigerating system. This shall apply
where appropriate following any repair.
• In case of repair work or replacing the control always use
new gasket Fig 3 (1).
T e c h n i c a l D a t a :
Protection class
(IEC 529/ DIN 40050)
Temperatures
Ambient (housing)/
Storage/ transport
Medium
Vibration resistance
Fluid Group
Hazard Category
(PED 2014/68/EU)
Refrigerants (ASHARE)
Dimensions
Pressure range
Fig. 4
PS4-A.../ -W...
13.8-27.6 bar
PS4-B.../ -R...
230 V AC
Electrical rating
PS4-A.../ -W...
PS4-B.../ -R...
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 (12,/ 24 VDC)
Marking
Low Voltage Directive & ENEC05
0035 Pressure Equipment Directive
No. E258370 (A2L pending)
pending
OI_PS4_A1_A2L_EN_DE_FR_ES_IT_Rev06_865025.docx
EN
during each periodic
IP67
IP00 (Terminal connection)
-40...+65 °C
-40...+135 °C
4 g (10...250 Hz)
I & II
PS4-W.../PS4-B...:
IV / Module B + D
&
Mineral-. Synthetic-. POE-
Lubricant
Fig. 5
Setting P / PS
MAX
0 < 6.9 bar 25 bar
7 - 27.6 bar 41 bar
27.7 – 38 bar 55 bar
38.1 – 50 bar 69 bar
41 bar
27.7 – 38 bar 55 bar
38.1 – 50 bar 68 bar
<28 V DC LRA
Ind. Ind.
6 A 2 A 36 A
6 A
2 A 15 A
A W B R
250 mA - -
Date: 19.04.2023