Emerson PT4 Instructions De Service

Библиотека СОК 
G e n e r a l i n f o r m a t i o n :
Pressure Transmitters convert a pressure into a linear
electrical output signal.
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.
• In a severely contaminated system, avoid
breathing acid vapors 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 exceed the specified maximum ratings for
pressure, temperature, voltage and current.
• Ensure that the system piping is grounded.
• Do not release any refrigerant into the
atmosphere!
• Do not operate system before all cable connections
are completed.
• 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
accordance with European pressure equipment
directive 14/68/EU.
• Ensure that design, installation and operation are
according to European
standards/regulations.
• Electronic devices are subject to electromagnetic
interference. Ensure that all components in the
system are sufficiently protected.
M o u n t i n g l o c a t i o n : ( F i g . 1 )
• In order to prevent ice build-up and or condensation
on the PT4 when connected to the suction pipe, it is
sometimes useful to extend the connection using a
nominal 200 mm piece of 6 mm/1/4" copper tube
from the main suction pipe.
• To maintain accuracy of PT4, the installation of a
pipe between pressure transmitter and source of very
high or very low temperature media is recommended.
• Protect PT4 against sunrays and vibration.
Emerson Climate Technologies GmbH
Am Borsigturm 31 I 13507 Berlin I Germany
Pressure Transmitter PT4
M o u n t i n g d i r e c t i o n :
• Position as desired
I n s t a l l a t i o n :
Flare Connection: (Fig.2)
• Do not exceed max. torque of 15 Nm for tightening
of PT4 to Schrader pressure connection.
Fig.2:
Note: If a leak is detected at the specified torque, the
flare surface of the Schrader connector should be
checked for scratches. Do not over torque; instead,
insert a copper gasket.
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
14/68/EU.
for product in
W a r n i n g :
• Failure to do so could result in loss of refrigerant
and personal injury.
• The pressure test must be conducted by skilled
and national
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 : ( F i g . 3 , F i g . 4 )
• For proper wiring use the cable assembly PT4-Mxx.
• Allow enough space on top of pressure transmitter to
mount plug as shown in Fig.4. The plug can be
mounted on pressure transmitter only in one position
(Fig.3 marking: ).
www.emersonclimate.eu
Operating instruction
pressure equipment directive
Date: 23.01.2018
Cable Colour Code and Pin Connection
Supply,
Part
+24 VDC
PT4-Mxx Pin 1: BN
(Plug/Cable) Brown wire
Note:
• In case electrical connection cable is extended
beyond 6 m, system signal noise and EMC must be
verified by installer for proper operation.
• Signal line should not be installed parallel with
power lines to avoid electrical interference.
S e r v i c e / M a i n t e n a n c e :
• Defective PT4 must be replaced, they cannot be
repaired.
T e c h n i c a l D a t a :
Pressure
Type
Range
PT4-07M -0.8...7 bar
PT4-18M 0...18 bar
PT4-30M 0...30 bar
PT4-50M 0...50 bar
Supply voltage 8...32V DC, class 2
Permissible noise &
ripple
Temperatures
...Transport and storage
...Operating ambient -40...+80°C (housing)
...Medium
Protection (EN 60529)
(with connector PT4-Mxx)
Dimensions
Marking
PT4_OI_ML_R08_863010.docx
Signal,
4 – 20 mA
Pin 2: WH
White wire
Max. working
Pressure PS
25 bar
33 bar
33 bar
50 bar
< 1 Vp-p
-40...+85°C
-50...+135°C
IP67
Fig. 4,5
UL (E258370)