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 .........................................
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.
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.
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.
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.
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.
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.
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
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.
Table 1.
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.
