RIVACOLD s r l Nordic Refrigeration Solutions User Guide
- July 9, 2024
- RIVACOLD s r l
Table of Contents
RIVACOLD s r l Nordic Refrigeration Solutions
Product Information
Specifications
- Manufacturer: RIVACOLD s.r.l.
- Address: Via Sicilia, 7 – Fraz. Montecchio – 61022 Vallefoglia (PU) – Italy
- Contact: Tel. +39 0721 919911, Fax. +39 0721 490015
- Email: info@rivacold.com
- Website: www.rivacold.com
Product Usage Instructions
Preparation for Start-Up
Before starting the system, ensure that all preliminary checks are completed:
- Ensure that the completed machine and system valves are open and service valves are closed with caps.
- Verify that users are correctly programmed.
Handling and Installation
For handling and installation operations, carefully read the assembly instructions provided.
The LED indicators on the product serve different functions based on their color:
- Red: Flashing indicates active alarms unseen, fixed indicates alarms seen.
- Yellow: Indicates the CO2 control unit is ON.
- Green: Indicates the CO2 control unit is in powered status.
- Perform the vacuum procedure only when the unit is OFF.
- Follow the steps to set up manual mode for the vacuum procedure as outlined in the manual.
FAQ
- Q: Can I perform the vacuum procedure with the unit turned on?
- A: No, the vacuum procedure should only be performed when the unit is OFF.
- Q: How do I access the alarm logs?
- A: Press the ALARM button to view the list of active alarms and access the alarm logs.
BEFORE CONSULTING THIS QUICK START GUIDE MAKE SURE THAT THE PARTLY COMPLETED MACHINERY HAS BEEN CORRECTLY INSTALLED AND CONNECTED.
FOR PARTLY COMPLETED MACHINERY HANDLING AND INSTALLATION OPERATIONS, CAREFULLY READ THE “ASSEMBLY INSTRUCTIONS”
Preparation for start-up
Before bringing the nearly completed machine to steady-state operating conditions several preliminary checks must be carried:
- Make sure that all the valves on the partly- completed machine and on the system are open, that the service valves are closed and that they all are fitted with caps.
- Make sure that all the electronic thermostatic valves of the users are correctly programmed.
To start the system it is necessary to follow this sequence of operations:
- Set the disconnector (1) of the electrical panel to ON to supply the entire system;
- Set the electronic control to ON via the display (2) and carry out the operations indicated.
LED indicators management
Vacuum
Check that all the valves on the partly completed machinery and on the system are open.
- Vacuum phase duration: approx. 24 h
- Vacuum level: 0.3mbar, constant
- The liquid passage indicator IND1 must indicate the absence of moisture (green color).
Service valve for vacuum pump:
- RS2 or RS2.P delivery (if present);
- liquid RS3;
- positive intake RS1.
Manual mode for vacuum procedure, to be performed only with the unit in OFF
If there is a cell control (MPX Pro or Ultracella) connected to the unit, it is also possible to force the electronic thermostatic valve to facilitate the vacuum procedure and refrigerant loading.
Refrigerant load
The pre-load stage must be performed in the gaseous phase ONLY.
For the refrigerant pre-load phase the following are necessary:
- that the partly-completed machine is electrically powered so that the YVEq.P YVEq.LT compressor bypass solenoid valves (if present) are energized);
- that the condensing unit and therefore the compressor and/or the compressors are in the OFF position from the electronic control keyboard;
- that the valves HPV and VFL are manually opened by electronic control to guarantee the opening of the entire refrigeration circuit.
During refrigerant pre-load, it is necessary to insert CO2 in the gaseous state at a pressure value well above the triple point (5.185 bar(a)) to avoid the formation of dry ice inside the system. A gaseous pre-filling of 10 bars is recommended throughout the circuit. The load points are RS1, RS2, RS3 and RS1.LT and RS2.P (if present). The reading of the pressure on each section is possible from the main screen of the electronic control.
The utilities must already be configured and programmed correctly for use with
CO2. Activate the utilities gradually during loading. During the loading
phase, the compressors will be activated and any alarms in the initial phase
may be present.
The phase of loading consists of restoring the completed machine, putting the
condensing unit and/or the compressors in ON from electronic control and
following the steps provided in the chapter on starting up. Loading can
continue in the liquid phase on the RS3 tap or in the vapor phase on RS1, and
RS1.LT (if present).
The utilities must be activated. Loading is complete when the liquid level
inside the receivers is at least above the halfway mark on the sight glass (1)
found on the receivers and there are no bubbles on the IND1 sight glass in
stationary conditions.
The passage indicator also provides indications on the presence of humidity.
This must not be present. If any is found, the system must be stopped and the
emptying and loading phases repeated.
Oil load
Use only the type of oil indicated
The oil must be added according to the refrigerant load as indicated in the table. If the refrigerant load is LOWER than 4kg, NO oil must be added.
The operation is carried out by following these steps:
- Stop the utilities and wait for the compressors to stop;
- Place the machine in OFF from the electronic control;
- Close the general intake valve r1;
- Remove the internal pressure by acting on the RS1 and RS2 valves;
- Using the RS1 valve, load oil and at the same time aspirate with a vacuum pump on the service valve RS2;
- Once loading is complete, close the RS1 and continue with the drain phase to the value previously described;
- Remove the vacuum pump and related pipes;
- Open the previously closed valves, reactivate the machine, reactivate the utilities, and wait for the system to stabilize, making sure there are no alarms present:
The partly-completed machine does not include oil monitoring in order to check its presence inside the compressor and the refrigerant circuit, however, the electronic controller includes a function that facilitates the return of the oil to certain working conditions of the compressor by forcing the compressor to work at a fixed speed for a set time to recover the oil lost along the refrigerant circuit.
Final phase
- Wait until the system is stable and perform the necessary optimizations, referring to the machine manual, and software manual of the controls.
CONTACT
- RIVACOLD s.r.l.
- Via Sicilia, 7 – Fraz. Montecchio – 61022 Vallefoglia (PU) – Italy
- Tel. +39 0721 919911 – Fax. +39 0721 490015
- info@rivacold.com – www.rivacold.com.
References
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>