Spirax Sarco ILVA20 User manual

IM-P337-73 EMM Issue 2 1
ILVA20 and MVT10 system
© Copyright 2019
Printed in GB
1. Rotating the electronics enclosure
Rotating the display
The electronics housing can be rotated through 360 degrees by releasing the 3 grub screws and turning the
white housing. The display can be rotated through +/-180 degrees. Do not rotate more then 360 degrees.
To rotate the electronics display, first disconnect the power supply to the MVT10. Unscrew the front
housing screw cap (with glass). Unscrew the three display retaining screws and rotate the complete display
cassette to the required position. Refit the retaining screws and front housing screw cap.
Caution:
Do not unplug the cables from the display
cassette and ensure that the cables are not
strained or trapped whilst carrying out this
procedure.
Caution:
Electrostatic discharge (ESD) procedures
should be followed whilst rotating the display.
3374450/2
ILVA20 and MVT10 System
Essential Installation Guide
IM-P337-73
EMM Issue 2
This guide must be read in conjunction with the Installation and Maintenance
Instructions (IM-P337-69) supplied with product.
This guide highlights the minimum installation requirements to ensure that the
product performs to user expectations.
The ILVA20 and MVT10 are a calibrated pair.
Ensure the correct MVT10 is fitted to the correct ILVA20.
Fixing screws
Fig. 1
© Copyright 2021
Printed in GB

IM-P337-73 EMM Issue 2
2
ILVA20 and MVT10 system
2. Horizontal installation
Maximum 45º Maximum 45º
Fig. 2
The ILVA20 can be rotated in a horizontal line by up to 45° (downwards only), see above.
The filling and hose connector plugs are supplied loose and thus need to be fitted to suit the orientation
of the 2 way manifold.
The hose connectors need to be fitted to allow for draining downwards. The filling plugs must then
be used on the opposite or upwards side to plug the remaining holes.
Minimum
100 mm
Separator
Isolation valve
Strainer
6D
minimum
3D
minimum
Required installation
Fig. 3
Earth lead

IM-P337-73 EMM Issue 2 3
ILVA20 and MVT10 system
+
-
+
-
3. Electrical installations -
with EIA 485 (RS485) communications
3.1 Loop power wiring
Connect 4-20 mA loop power (24 Vdc +/-10% at 25 mA, 1W max.) to the +Loop Power and Loop Power
terminals on the terminal block.
WARNING
The supply must be fitted with an external T1A fuse.
Fig. 4
Fuse
1A
Fuse
T1A
Fuse
T1A
Power (+)
In (-)
+24 Vdc
=/-10%
250
ohm
max
Remote NPN input
Remote PNP input
Power (max 28 Vdc)
Power (max 28 Vdc)
R≥ 10K Ohm
R≥ 10K Ohm
0 Volts
0 Volts
230 V
50 Hz
L
1
2
3
4
5
N
Or
Or
M750 display unit
with 4-20mA active
input (supplying
current loop)
Loop powered
4-20 mA active display unit,
chart recorder or current
measuring DAQ device

IM-P337-73 EMM Issue 2
4
ILVA20 and MVT10 system
+
-
TX-
Fig. 5
DO NOT USEDO NOT USE
TEMPERATURE PRESSURE
SLAVE
B = Data +
-Ve -Ve -Ve -Ve +Ve +Ve +Ve +Ve
A = Data - COMMON
EARTH*
EARTH*
Tx Tx Tx Tx
Rx Rx Rx Rx
MASTER SLAVE SLAVE SLAVE
R*
COMMON
T1A
+24Vdc +/-10%
250mA (min)
20FF WIRE LINKS
EARTH*
R*
3.2 EIA/TIA-485 communication wiring