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Vission 20/20 Retrofit Instructions
Table of Contents
Sections
1.0
2.0
2.1
2.2
3.0
Page
General Information ................................................................................................................ 3
Vission 20/20 Retrofit Instructions .......................................................................................... 4
Removal ................................................................................................................................. 4
Installation .............................................................................................................................. 5
Field Wiring Instructions ......................................................................................................... 9
Table/Figures
Page
Table 1.
Torque Specifications .................................................................................................... 12
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
VSS Compressor Unit with Keypad Microprocessor ....................................................... 4
Block and Bleed Assembly ............................................................................................. 5
Vission 20/20 with Vibration Isolators .......................................................................... 6
Block and Bleed Assembly with Transducers .................................................................. 6
Compressor Unit RTD Locations .................................................................................... 7
Block and Bleed Assembly with Transducers and Cables ................................................ 8
RTD and Transducer Cable Routing ............................................................................... 8
Solenoid Cable Routing ................................................................................................. 9
MCC and Customer Control Center Interconnect Wiring ............................................... 10
Vission 20/20 Mircocontroller Diagram ......................................................................... 10
Vission 20/20 Terminal Blocks ....................................................................................... 11
1.0
General Information
This procedure defines the steps required to replace a Vilter Keypad Microcontroller with the Vission 20/20
Microcontroller.
It is highly recommended that the instructions be reviewed prior to retrofitting.
Figures and tables are included to illustrate key concepts.
Safety precautions are shown throughout the manual. They are defined as the following:
WARNING - Warning statements are shown when there are hazardous situations, if not avoided, will result in serious
injury or death.
CAUTION - Caution statements are shown when there are potentially hazardous situations, if not avoided, will result
in damage to equipment.
NOTE - Notes are shown when there are additional information pertaining to the instructions explained.
ViSSion® 20/20 Retrofit Instructions • 35391SCRF
3
2.0
Vission 20/20 Retrofit Instructions
This procedure defines the steps required to replace a Vilter Keypad Microcontroller with the Vission
20/20 Microcontroller.
2.1
Step 1.
Removal
Safely shutdown and de-energize the compressor unit (1) and keypad microcontroller (2) adhering to
safe practices including lock-out/tag-out procedures.




Figure 1. VSS Compressor Unit with Keypad Microprocessor
Step 2.
Disconnect wiring from transducers.
WARNING
When handling microcontroller, use additional
personnel or lifting device as required. Failure to
comply may result in serious injury and/or damage to
equipment.
Step 3.
With additional personnel or lifting device, remove hardware securing keypad microcontroller (2) to
rails (4). Remove keypad mirocontroller.
NOTE
Some compressor units are equipped with transducers and RTDs, if equipped,
continue to step 3. If not, continue to installation.
4
Step 4.
Disconnect all associated pressure and temperature sensors from compressor unit (1) and existing
block and bleed assembly (3), if present.
Step 5.
Remove the existing block and bleed assembly (3), if present.
ViSSion® 20/20 Retrofit Instructions • 35391SCRF
2.2
Installation
NOTE
Torque all hardware according to torque table specifications, see Table 1.
NOTE
Modification to rails may be required to support and properly align Vission 20/20
microcontroller and block and bleed assembly. Follow standard practices for
weldment and fabrication procedures.
Step 5.
Install new block and bleed assembly (4) on rails (3).


Figure 2. Block and Bleed Assembly
WARNING
When handling microcontroller, use additional
personnel or lifting device as required. Failure to
comply may result in serious injury and/or damage to
equipment.
NOTE
On smaller compressor units, ensure there is adequate clearance between
Vission 20/20 microcontroller and volume slide actuator. Adjust location of
microcontroller as required by modifying support structure.
Step 6.
Make sure Vission 20/20 microcontroller will install onto existing rails. Measure mounting holes on rails
(3) and Vission 20/20 microcontroller (6), taking into consideration dimension of mounting holes of
vibration isolators (5).
Step 7.
Modify structure of rails (3) if required. Follow standard welding and fabrication procedures.
ViSSion® 20/20 Retrofit Instructions • 35391SCRF
5
Step 8.
Install hardware to secure new vibration isolators (5) to mounting holes of Vission 20/20
microcontroller (6).




Figure 3. Vission 20/20 with Vibration Isolators
Step 10. With additional personnel or lifting device, install hardware to secure Vission 20/20 microcontroller (6)
with vibration isolators (5) to rails (3).
NOTE
Ensure to use correct transducers because transducers have different pressure
ranges. Suction manifold uses 0-200 psia transducer, discharge manifold and oil
filter inlet uses 0-414.5 psia transducer.
Step 9.
Install transducers (7) on block and bleed assembly (4).


Figure 4. Block and Bleed Assembly with Transducers
6
ViSSion® 20/20 Retrofit Instructions • 35391SCRF
NOTE
Stainless steel tubing is not provided in a retrofit kit.
Step 10. Route stainless steel tubing from suction manifold, discharge manifold and oil filter inlet lines. If existing
tubing is not reusable then cables can be secured to block and bleed assembly (4).
NOTE
Wells are also provided in retrofit kit. Install new wells as required.
Step 11. Install RTDs (8) on suction manifold (9), discharge manifold (11), oil separator (12) and inlet oil line (14)
or oil manifold (13), if equipped.















Figure 5. Compressor Unit RTD Locations
Step 12. Connect cables (10) to RTDs (8).
ViSSion® 20/20 Retrofit Instructions • 35391SCRF
7
Step 12. Connect cables (10) to transducers (7).


Figure 6. Block and Bleed Assembly with Transducers and Cables
Step 13. Route cables (10) from RTDs (8) and transducers (7) through bottom right side of Vission 20/20
microcontroller (6).


Figure 7. RTD and Transducer Cable Routing
8
ViSSion® 20/20 Retrofit Instructions • 35391SCRF
CAUTION
Do not route A/C and D/C wires together, this will
cause Electromagnetic Interferance. Failure to comply
may result in damage to equipment.
Step 14. If equipped with solenoids (15) (i.e. Danfoss Motorized Valve), route cables (16) from solenoids through
bottom left side of Vission 20/20 microcontroller (6).



Figure 8. Solenoid Cable Routing
Step 15. To make following connections according to supplied wiring diagram, refer to Section 3.0 Field Wiring
Instructions.
3.0
Field Wiring Instructions
NOTE
This procedure defines steps required to wire Vission 20/20 microcontroller for
the following items: Compressor Motor Starter Auxiliary Contact, High Level
Shutdown, Oil Separator Heater(s), Oil Pump Start and Compressor Starter.
General figures, Figures 9, 10 and 11 are used for purposes of explanation, follow
supplied wiring diagram for detailed wiring.
Step 1.
Control power of 115 VAC 50/60 HZ must be wired to left side of terminal blocks inside the Vission
20/20 cabinet. Line power (1A) shall be connected to 15-amp circuit breaker, CB1. Neutral (1N) is
connected to any N terminal blocks. Number of line power feeds required to panel is dependent upon
number supplied on compressor. Line power feeds for oil heaters are brought to additional 15-amp
circuit breakers, CB2A, CB2B, CB2C and CB2D. Neutrals for circuits (2N, 3N, 4N, and 5N) are connected
to terminal blocks labeled HTN2, HTN3, HTN4, and HTN5. Units with V-PLUS® oil cooling, L1 must
connected to fuse in V-PLUS panel, and L1A must be connected to terminal 2B.
ViSSion® 20/20 Retrofit Instructions • 35391SCRF
9
VISSION 2020 ON COMPRESSOR SKID
CUSTOMER MCC PANEL
(REFERENCE MCC OR STARTER DRAWING FOR DETAILED WIRING)
#12AWG THHN (MINIMUM)
CB1
TB1-1A
CUSTOMER SUPPLIED
VISSION POWER CIRCUIT
VISSION 20/20 POWER
TB1-N
N
AUX MS1
TB-1
COMPRESSOR MOTOR
STARTER AUX CONTACT
TB1-18
COMPRESSOR MOTOR
STARTER AUX CONTACT
TB1-4
TB-31
TB-11
TB1-11
COMPRESSOR START
COMMAND
OIL PUMP START
TB-12
TB1-12
OIL PUMP START
COMMAND
OIL SEPARATOR
HEATER START
TB-17
TB1-17
OIL SEPARATOR HEATER
START COMMAND
COMPRESSOR START
Figure 9. MCC and Customer Control Center Interconnect Wiring
Step 2.
An auxiliary contact from compressor motor starter is required. Connect isolated contact to terminal
blocks 1 and 31.
CONTROL POWER
DISCONNECT AND BRANCH CIRCUIT PROTECTION TO BE
SIZED PER THE NATIONAL ELECTRIC CODE.
INCOMING POWER SUPPLIED FROM REMOTE CUSTOMER
SUPPLIED UL LISTED FUSED DISCONNECT OR BREAKER
1A
1
N1
FROM LINE 31
35
2
RS50-24
DC POWER
SUPPLIES
36
37
OUTPUT
24 COM
39
8
OUTPUTS
DIGITAL OUTPUT: BOARD #1
PLUG X1
10
11
12
13
1
3
4
12A
N COMPRESSOR
CR
CMP
STARTER
70
N OIL PUMP STARTER
CR
OP
73
BLUE
13
A1
*SEE NOTE 10
BLACK
N CAPACITY
INCREASE/DECREASE
ACTUATOR
14
BROWN
H
LOW OIL LEVEL
LS1
1
1
32
2
33
3
34
4
COMPRESSOR MOTOR
STARTER AUXILIARY
CONTACT
HIGH LEVEL SHUTDOWN
OPTIONAL OIL LEVEL FLOAT
SWITCH #1
OPTIONAL OIL LEVEL FLOAT
SWITCH #2
41
42
43
44
N
N
INPUTS
N
N
1
35
5
1
36
6
1
37
7
1
38
8
OPTIONAL CAPACITY
CONTROL SELECT 1/2
OPTIONAL REMOTE
START/STOP
OPTIONAL REMOTE
CAPACITY INCREASE
OPTIONAL REMOTE
CAPAPCITY DECREASE
45
46
47
14
OUTPUTS
1
16
17
18
19
48
H
DIGITAL OUTPUT: BOARD #1
PLUG X2
15
2
11A
1
HL
SHUTDOWN AUX
31
38
40
1
1
AUX MS1
+24VDC
7
9
INPUTS
1
DIGITAL INPUT: BOARD #3
PLUG X2
RD35-A
+5VDC
+12VDC
5/12 COM
TO CPU BASEBOARD
6
33
34
LINE
LOAD
1C
5
N
DIGITAL INPUT: BOARD #3
PLUG X1
1B
EMI FILTER
4
GND
OUTPUT
1
DOOR
GND LUG
N
GND
SW 1
E-STOP
INPUT
CB 1
15 AMPS
INPUT
3
FROM LINE 31
32
115VAC / 60HZ
2
GND
5
BLUE A2
*SEE NOTE 10
15
BLACK
6
16
7
17
49
N VOLUME
INCREASE/DECREASE
ACTUATOR
BROWN
8
18
A1
CRH
N
A2
H
OUTPUT CAN ALSO BE USED WITH AN INDICATING LIGHT, HORN,
OR PLC INPUT (CUSTOMER SUPPLIED)
N
OIL SEPARATOR
HEATER START
74, 78
OPTIONAL TRIP
INDICATION
50
51
52
53
54
Figure 10. Vission 20/20 Mircocontroller Diagram
Step 3.
10
A dry contact from control relay CR11 must be wired to compressor motor starter coil. This dry contact
is wired to terminal blocks according to supplied drawing. Control power for this coil should come from
a source, which will be de-energized with compressor disconnect.
ViSSion® 20/20 Retrofit Instructions • 35391SCRF
Step 4.
A dry contact from control relay CR12 must be wired to oil pump motor starter coil. This dry contact is
wired to two terminal blocks according to supplied drawing. Control power for this coil should come
from a source, which will be de-energized with compressor disconnect.
Step 5.
An auxiliary safety cutout is available to shut down compressor package. A dry contact must be supplied
and wired to terminal blocks 1 and 32. The jumper installed on terminal blocks must be removed to use
this cutout. If contact is closed, it will allow compressor to run. If contact opens at any time, compressor
will shut down.
CB2C
15 A
CB2C
15 A
CB2C
15 A
GND
GND
GND
HT-N1
HT-N2
X1
X3
X4
ANALOG INPUT BOARD #6
DIGITAL OUTPUT BOARD #1
X2
X5
CB2C
15 A
CB2C
15 A
CB2C
15 A
X1
GND
GND
GND
HT-N1
HT-N2
X4
X5
ANALOG OUTPUT BOARD #10
OPEN
1
2
3
4
5
C5
CUSTOMER ANALOG WIRING
C4
DIGITAL INPUT BOARD #3
1
1
1
1
1
1B
N
N
N
N
N
11
12
13
14
15
16
17
18
21
22
23
24
25
26
27
28
31
32
33
34
35
36
37
38
45
46
47
48
DIGITAL WIRING
CUSTOMER DIGITAL WIRING
CB 1
15 A
CB 1
15 A
1
1
1
1
1B
N
N
N
N
N
X3
ANALOG INPUT BOARD #7
DIGITAL OUTPUT BOARD #2
X2
Figure 11. Vission 20/20 Terminal Blocks
Step 6.
Indication of compressor shutdown status is also available. There is an output on terminal blocks 18 and
N where a relay coil can be wired. For output, an energized state represents a “safe” condition. A deenergized state indicates a loss of voltage to relay coil or a “failure” has occurred.
Step 7.
Current transformer supplied in compressor motor conduit box should be checked to insure that motor
leads of one leg are pulled through the transformer. Note, there is a dot on one side of the current
transformer. This dot must face away from the motor. Typically, a wye delta started motor should
have leads 1 and 6 pulled through this transformer for a 6 lead motor. However, this should always be
checked as different motors and starting methods will require different leads to be used.
ViSSion® 20/20 Retrofit Instructions • 35391SCRF
11
Table 1. Torque Specifications
Torque Specifications (ft-lbs)
Type
Bolt
Head
Markings
SAE Grade 2
Coarse (UNC)
SAE Grade 5
Coarse (UNC)
SAE Grade 5
Coarse (UNC)
SAE Grade 8
Coarse (UNF)
Nominal Size Numbers or Inches
#10
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
-
5
10
18
29
44
63
87
155
150*
-
8
16
28
44
68
98
135
240
387
-
-
18
-
-
-
-
-
-
-
-
11
22
39
63
96
138
191
338
546
5
13
26
46
73
112
115
215
380
614
Socket Head
Cap Screw
(ASTM A574)
Coarse (UNC)
1) Torque values in this table are not to override other specific torque specifications when supplied.
2) When using loctite, torque values in this table are only accurate if bolts are tightened immediately after
loctite is applied.
* The proof strength of Grade 2 bolts is less for sizes 7/8 and above and therefore the torque values are less
than smaller sizes of the same grade.
Torque Specifications for 17-4 Stainless Steel Fasteners (ft-lbs)
Type
Bolt/Nut
Nominal Size Numbers or Inches
Head
Markings
#10
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
Hex & Socket
Head Cap Screws
3
8
14
25
40
60
101
137
245
Nut
-
8
-
25
-
-
-
-
-
NOTE: Continue use of red loctite #271 (VPN 2205E) on currently applied locations. Use blue loctite #243
(VPN 2205F or 2205G) on all remaining locations.
12
ViSSion® 20/20 Retrofit Instructions • 35391SCRF
35391SCRF Rev. 1 (4/13) Emerson and Vilter are trademarks of Emerson Electric Co. or one of its affiliated companies. © 2012 Emerson Climate Technologies, Inc. All rights reserved. Printed in the USA.