Emerson Alco Controls PS3 Serie Instructions De Service

For application in refrigeration systems and heat
pumps according to EN 378.
A professional and appropriate storage and allocation
of the devices is mandatory.
!
Safety instructions:
Read installation instructions thoroughly. Failure
•
to comply can result in device failure, system
damage or personal injury.
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.
Ensure supply voltage and current of electric
•
device match rating on PS3 name plate.
Disconnect supply voltage from system and PS3
before installation or service.
• Do not exceed test pressure.
Keep temperatures within nominal limits. Switch
•
housing temperature must not exceed 70°C in
high medium temperature applications.
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 (Fig. 4).
Setting:
PS3 Pressure switches are factory preset to a specific
value (see label). Cut-in/cut-out and differential may
not be readjusted by the customer (otherwise product
looses warranty).
Function / Type of switch (see Fig. 1,2 and 3):
Fig. 1: Pressostat with automatic reset
Fig. 2: Low pressure cut-out (manual reset min.)
Fig. 3: High pressure cut-out (manual reset max.)
Fig. 1 Fig. 2
4
1
1
2
+ +
P
P
- -
PS3 with automatic reset:
PS3 Pressure switches are equipped with a SPDT
snap action contact switching from 1-2 to 1-4 on
rising and from 1-4 to 1-2 on falling pressure.
PS3 with manual reset (min. or max.):
Reaching the preset switching point contact 1-4
opens (low pressure switch) or contact 1-2 opens
(high pressure switch) and latches. After the pressure
rises by appr. 1.5 bar (low pressure switch) or drops
by appr. 3...5 bar depending on pressure range (high
pressure switch) the switch can be reset by pushing
the reset button.
Mounting:
PS3 Pressure switches should not be exposed to
pulsations. Use a pulsation damper or a capillary tube
connection (min.1m) when pulsations can be
expected.
Mounting direction: any
Pressure connection: see Fig. 4 and 5
(1) = Copper gasket
(2) = Damp cloth
Apply Teflon sealant to adapter thread.
Emerson Climate Technologies GmbH
Am Borsigturm 31 I 13507 Berlin I Germany
Pressure Controls Series PS3
Leakage test:
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 97/23/EC
- 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.
Maintenance/Service:
In case of repair work or replacing the control always
use new gasket Fig 4 – (1).
Electrical connection:
Note: Comply with local electrical regulations
when wiring PS3. To maintain IP65, proper
installation is mandatory.
Connection with cables PS3-Nxx/-2xx/-4xx (Fig.6-8):
Fig. 7 High Pressure Application
Fig. 8 Low Pressure Application
bk = black;
Plug meets requirements of DIN 40050/IEC 529/
EN60529. Plug has an integrated gasket. Fasten screw
with max. torque 0,05Nm. Plug cannot be repaired, in
case of failure replace product. Only one mounting
position is possible.
Technical data:
• Protection class (EN 60529):
IP65 with PS3-Nxx/-Lxx
IP00 (w/o appliance socket)
Fig. 3
• Ambient temperature (housing): -40°C to +70°C
4
4
• Storage and transportation temperature:
1
2
-40°C to +70°C
2
• Medium temperature:
+
P
- Pressure range:
1...5/A...E/J...N/S...W
6/F/O/X
• Max. operating pressure: see type code/pressure
range
• Design pressure PS:
range
• Vibration resistance:
• Electrical rating - Standard / Micro-switch:
Inductive (AC15): 3A / 1.5A @ 230V AC
Locked rotor (LRA, AC3): 36A / 15A @ 230V AC
• For electronic applications with low electrical loads
(current <100mA) standard contacts are not suitable.
• Medium compatibility: HFC, HCFC
• Marking:
CE acc. Low Voltage Directive all models,CE
according to PED 97/23/EC: Type approved
models only.
www.emersonclimate.eu
Operating Instructions
bl = blue; br = brown
-40°C to +70°C
-40°C to +150°C
see type code/pressure
4g (10...1000 Hz)
Date: 20.06.2016
Type code:
  
PS3 -
e.g. PS3 – W 6 S

Function
A = Pressure control, automatic
B = Pressure cut out, external manual reset,
type approval, EN 12263, PZL/PZH
R = Pressure control, external manual reset
S = Safety pressure cut out, internal manual reset,
type approval, EN 12263 PZHH
W = Pressure limiter, automatic, type approval,
EN 12263, PSL / PSH
NOTE: Function types B, R or S protect against high
pressure in combination with Pressure Ranges 4, 5, 6 and
against low pressure in combination with Pressure Range
1 and 3.

Pressure range Max. allowable Test Pressure
1/A/J/S = -0,6 .. 6bar
3/C/L/U = 0,1 .. 16bar
4/D/M/V = 6 .. 30bar
5/E/N/W = 6 .. 30bar
6/F/O/X = 10 .. 45bar
NOTE: 1...6 Standard contacts
A...F Gold plated contacts
J...O Microswitch
S...X Microswitch gold plated contacts

Pressure connection
A = 7/16"-20 UNF male
G = G1/4" female brass
K = 1 m capillary w. flare nut 7/16"-20 UNF
L = 1/4"-ODM solder with 1m capillary tube
R = G1/4" male brass
S = 7/16"-20 UNF female with schraeder opener,
(snubber on range 6/F/O/X only)
U = 6 mm - ODF solder
(snubber on range 6/F/O/X only)
X = 1/4" - ODF solder
(snubber on range 6/F/O/X only)
0035
PS3_OI_ML_R13_0716000.docx
Pressure (PS) (PT)
27bar 30bar
27bar 30bar
31bar 36bar
31bar 36bar
45bar 50bar