Danfoss OP-LPQE034MLW12E Optyma Slim Pack Instructions

Danfoss OP-LPQE034MLW12E Optyma Slim Pack

Product Specifications

• Name: OptymaTM Slim Pack OP-LPQE/MPJE
• Application: MBP
• Refrigerant: R404A, R507, R22, R134a, R513A, R448A, R449A, R452A
• Maximum Working Pressure (M.W.P.): HP – 28 bar, LP – 7 bar
• Voltage: 380-400V3N~/50Hz
• Serial Number: 123456CG0514
• Manufacturer: Danfoss A/S, 6430 Nordborg, Denmark

Product Usage Instructions

Installation and Servicing

• Condensing units should be installed and serviced by qualified personnel following sound refrigeration engineering practices.
• Ensure compliance with safety regulations such as EN378.

Designated Use

• Use the condensing unit only for its intended purpose(s) and within its specified scope of application.

Maintenance

• Check the condenser annually for clogging and clean it if necessary. Access the internal side through the fan panel.
• Microchannel coils are easier to clean than fin-&-tube coils.

Refrigerant Handling

• If the refrigerant system is opened, flush it with dry air or nitrogen to remove moisture. Install a new filter drier if needed.
• Evacuate refrigerant carefully to prevent environmental contamination.

Frequently Asked Questions

Q: Can I braze the condensing unit while it is pressurized?

A: Do not braze the unit while it is pressurized.

Q: How often should I check the condenser?

A: The condenser should be checked at least once a year for clogging and cleaned if necessary.

Q: What should I do if the refrigerant system has been opened?

A: Flush the system with dry air or nitrogen, install a new filter drier, and evacuate refrigerant carefully to prevent leaks.

Q: How should I dispose of condensing units and oil?

A: Danfoss recommends recycling condensing units and oil through a suitable company at their site.

Instructions

Nameplate

• A: Model
• B: Code number
• C: Application, Protection
• D: Refrigerant
• E: Housing Service Pressure
• F: Supply voltage, Locked Rotor Ampere, Maximum Current Consumption
• G: Serial Number and barcode
• Installation and servicing of the condensing units by qualified personnel only.
• Follow these instructions and sound refrigeration engineering practices relating to installation, commissioning, maintenance, and service.
• The condensing unit must only be used for its designed purpose(s) and within its scope of application.
• Under all circumstances, the EN378 (or other applicable local safety regulations) requirements must be fulfilled.
• The condensing unit is delivered under nitrogen gas pressure (1 bar) and hence it cannot be connected as it is; refer to the «installation» section for further details.
• The condensing unit must be handled with caution in the vertical position (maximum offset from the vertical: 15°)

Designation system for the Optyma™ Slim Pack range

1| Application

M = MBP

L = LBP

---|---
2| Package

P = Packaged unit

3| Refrigerant

J = R22/R134a/R513A/R404A/R448A/R449A/R452A

Q = R404A/R507/R452A

4| Condenser

E: Extreme and tropical ambient conditions up to 48°C

5| Swept volume

Swept volume in CC

6| Compressor platform

ML = MLZ (Scroll)

NT = NTZ (Reciprocating)

LL = LLZ (Scroll)

7| Version

See the version control table

8| Voltage code

G = Compressor 230V/1N~/50Hz, fan 230V/1~/50Hz

E = Compressor 400V/3N~/50Hz, fan 230V/1~/50Hz

Version control

Introduction

• These instructions pertain to OptymaTM Slim Pack condensing units OP-LPQE/MPJE(R22, R404A, R507, R134a, R513A, R448A, R449A, R452A) used for refrigeration systems.
• They provide necessary information regarding the safety and proper usage of this product.

The condensing unit includes the following:

• Scroll/reciprocating compressor
• Microchannel heat exchanger
• Dual pressure switches
• Service valves suction/ liquid
• Weatherproof housing (IP 54)
• Filter drier
• Receiver with stop valve
• Sight glass
• Solenoid valve
• Phase sequence relay *)
• Fully pre-wired electrical panel (including main switch, compressors contactor, overload relay)
• Crankcase heater (OP-LPQE units in W12)
• Refer to version control for component details in all versions

Handling and storage

• It is recommended not to open the packaging before the unit is at the final place for installation.
• Handle the unit with care. The packaging allows for the use of a forklift or pallet jack. Use appropriate and safe lifting equipment.
• Store and transport the unit in an upright position.
• Store the unit between -35°C and 50°C.
• Don’t expose the packaging to rain or a corrosive atmosphere.
• After unpacking, check that the unit is complete and undamaged.

Installation precautions

• Do not braze as long the condensing unit is under pressure.
• Never place the unit in an explosive atmosphere
• Place the unit so that it is not blocking or hindering walking areas, doors, windows, or similar.
• Ensure adequate space around the unit for air circulation and to open doors. Refer to picture 1 for minimal values of distance to walls.
• Avoid installing the unit in locations exposed to direct sunshine daily for longer periods.
• Avoid installing the unit in aggressive and dusty environments.
• Ensure a foundation with horizontal surface (less than 3° slope), is strong and stable enough to carry the entire unit weight and to eliminate vibrations and interference.
• The unit ambient temperature may not exceed 50°C during off-cycle.
• Ensure that the power supply corresponds to the unit characteristics (see nameplate).
• When installing units for HFC refrigerants, use equipment specifically reserved for HFC refrigerants which was never used for CFC or HCFC refrigerants.
• Use clean and dehydrated refrigeration-grade copper tubes and silver alloy brazing material.
• Use clean and dehydrated system components.
• The suction piping connected to the compressor must be flexible in 3 dimensions to dampen vibrations.
• Furthermore, piping has to be done in such a way that oil return for the compressor is ensured and the risk of liquid slug over in the compressor is eliminated.

Installation

• The installation in which the condensing unit is installed must comply with EEC Pressure Directive (PED) no. 2014/68/EU. The condensing unit itself is not a ”unit” in the scope of this directive.
• Under all circumstances, local safety regulations must be fulfilled.
• The unit must be securely installed on a stable and rigid support, and fixed from the beginning. See picture 2.
• It is recommended to install the unit on rubber grommets or vibration dampers. Rubber pads with mounting bolts are supplied.
• Slowly release the nitrogen holding charge through the schrader port.
• Connect the unit to the system as soon as possible to avoid oil contamination from ambient moisture.
• Avoid material entering into the system while cutting tubes. Never drill holes where burrs cannot be removed.
• Braze with great care using state-of-the-art techniques and vent piping with nitrogen gas flow.
• Connect the required safety and control devices. When the schrader port is used for this, remove the internal valve.
• It is recommended to insulate the suction pipe up to the compressor inlet with 19 mm thick insulation.

Leak detection

• Never pressurize the circuit with oxygen or dry air. This could cause fire or explosion.
• Do not use dye for leak detection.
• Perform a leak detection test on the complete system.
• The maximum test pressure is 31 bar.
• When a leak is discovered, repair the leak and repeat the leak detection.

Vacuum dehydration

• Never use the compressor to evacuate the system.
• Connect a vacuum pump to both the LP & HP sides.
• Pull down the system under a vacuum of 500 μm Hg (0.67 mbar) absolute.
• Do not use a megohmmeter nor apply power to the compressor while it is under vacuum as this may cause internal damage.

Electrical connections

• Switch off and isolate the main power supply.
• Ensure that the power supply can not be switched on during installation.
• All electrical components must be selected as per local standards and unit requirements.
• Refer to the wiring diagram for electrical connection details.
• Ensure that the power supply corresponds to the unit characteristics and that the power supply is stable (nominal voltage ±10% and nominal frequency ±2,5 Hz).
• Dimension the power supply cables according to unit data for voltage and current.
• Protect the power supply and ensure correct earthing.
• Make the power supply according to local standards and legal requirements.
• The unit is equipped with high and low-pressure switches, which directly cut the power supply to the compressor and provide 230V a.c. alarm signals (max.50VA) in case of activation.
• Is also equipped with a phase sequence relay to protect the unit against phase loss/sequence/asymmetry and under-/over-voltage.
• For units with a 3-phase scroll compressor, the correct phase sequence for compressor rotation direction shall be observed.
• Determine the phase sequence by using a phase meter to establish the phase orders of line phases L1, L2, and L3.
• Connect line phases L1, L2, and L3 to main switch terminals T1, T2, and T3 respectively.
• DGT protection is required if the high and low-pressure switch settings do not protect the compressor against operations beyond its specific application envelope.
• Please refer to the examples below, which illustrate where DGT protection is required (n°1) and where it is not (n°2).
• The compressor must not be allowed to cycle on the discharge gas thermostat. Continuous operations beyond the compressor’s operating range will cause serious damage to the compressor!
• A DGT accessory is available from Danfoss: refer to the section “Spare parts & accessories.

Safety

• A fusible Plug is not available in the unit, it is replaced with an adapter plug.
• The unit has a liquid receiver with an Adapter Plug with a 3/8” NPT connection. installer/end user can select various options as mentioned in EN378-2: 2016 Article § 6.2.2.3
• Optima Slim Pack (W12 version only) fitted with an atmospheric pressure relief valve. Don’t connect any tube at the end of the pressure relief valve.
• Optima Slim Pack (W12 version only) factory fitted with pressure relief valve at 33 bar setting.
• Once the pressure relief valve opens, don’t use dry air or oxygen to evacuate.
• Once the pressure relief valve opens, Danfoss recommended replacing the new pressure relief valve.
• The unit/installation into which the condensing unit is mounted/integrated must be under the PED.
• Beware of hot and extremely cold components.
• Beware of moving components. The power supply should be disconnected while servicing.

Filling the system

• Wear protective stuff like goggles and protective gloves.
• Never start the compressor under vacuum. Keep the compressor switched off.
• Before charging the refrigerant, verify that the oil level is between ¼ and ¾ on the compressor oil sight glass. If additional oil is required please refer to the compressor’s label for the type of oil.
• Use only the refrigerant for which the unit is designed.
• Fill the refrigerant in the liquid phase into the condenser or liquid receiver. Ensure a slow charging of the system to 4 – 5 bar for R404A /R507, R22, R452A or R448A/R449A and approx. 2 bar for R134a and R513A.
• Do not put liquid refrigerant through the suction line.
• It is not allowed to mix additives with the oil and/or refrigerant
• The remaining charge is done until the installation has reached a level of stable nominal condition during operation.
• Never leave the filling cylinder connected to the circuit.

Verification before commissioning

• Use safety devices in compliance with both generally and locally applicable regulations and safety standards.
• Verify that all electrical connections are properly fastened and in compliance with local regulations.
• When a crankcase heater is required, it must be energized at least 12 hours before initial start-up and start-up after a prolonged shut-down period.

Start-up

• Never start the unit when no refrigerant is charged.
• All service valves must be in the open position. See picture 3.
• Check compliance between the unit and power supply.
• Check that the crankcase heater is working.
• Check that the fan can rotate freely.
• Check that the protection sheet has been removed from the backside of a condenser.
• Balance the High Pressure / Low Pressure.
• Energize the unit. It must start promptly. If the compressor does not start, check wiring conformity, voltage on terminals, and sequence phase.
• Eventual reverse rotation of a 3-phase compressor can be detected by the following phenomena; the unit doesn’t start, the compressor doesn’t build up pressure, and it has an abnormally high sound level and abnormally low power consumption.
• In such a case, shut down the unit immediately and connect the phases to their proper terminals.
• If the rotation direction is correct the low pressure indication on the low pressure gauge shall show a declining pressure and the high pressure indication on the high pressure gauge shall show an increasing pressure.

Check with the running unit

• Check the fan rotation direction. Air must flow from the condenser towards the fan.
• Check current draw and voltage.
• Check suction superheat to reduce the risk of slugging.
• When a sight glass is provided observe the oil level at the start and during operation to confirm that the oil level remains visible.
• Respect the operating limits.
• Check all tubes for abnormal vibration. Movements above 1.5 mm require corrective measures such as tube brackets.
• When needed, additional refrigerant in the liquid phase may be added on the low-pressure side as far away as possible from the compressor.
• The compressor must be operating during this process.
• Do not overcharge the system.
• Never release refrigerant into the atmosphere.
• Before leaving the installation site, carry out a general installation inspection regarding cleanliness, noise, and leak detection.
• Record the type and amount of refrigerant charge as well as operating conditions as a reference for future inspections.

Maintenance

• Always switch off the unit at the main switch before removing the fan panel.
• Internal pressure and surface temperature are dangerous and may cause permanent injury. Maintenance operators and installers require appropriate skills and tools. Tubing temperature may exceed 100°C and can cause severe burns.
• Ensure that periodic service inspections to ensure system reliability and as required by local regulations are performed.

To prevent system-related problems, the following Periodic maintenance is recommended:

• Verify that safety devices are operational and properly set.
• Ensure that the system is leak-tight.
• Check the compressor current draw.
• Confirm that the system is operating in a way consistent with previous maintenance records and ambient conditions.
• Check that all electrical connections are still adequately fastened.
• Keep the unit clean and verify the absence of rust and oxidation on the unit components, tubes, and electrical connections.
• The condenser must be checked at least once a year for clogging and be cleaned if deemed necessary. Access to the internal side of the condenser takes place through the fan panel.
• Microchannel coils tend to accumulate dirt on the surface rather than inside, which makes them easier to clean than fin-&-tube coils.
• Switch off the unit at the main switch before removing any panel from the condensing unit.
• Remove surface dirt, leaves, fibers, etc. with a vacuum cleaner, equipped with a brush or other soft attachment.
• Alternatively, blow compressed air through the coil from the inside out, and brush with a soft bristle. Do not use a wire brush.
• Do not impact or scrape the coil with the vacuum tube or air nozzle.
• If the refrigerant system has been opened, the system has to be flushed with dry air or nitrogen to remove moisture and a new filter drier has to be installed.
• If evacuation of refrigerant has to be done, it shall be done in such a way that no refrigerant can escape to the environment.

Warranty

Always transmit the model number and serial number with any claim filed regarding this product.

The product warranty may be void in the following cases:

• Absence of nameplate.
• External modifications; in particular, drilling, welding, broken feet, and shock marks.
• Compressor opened or returned unsealed.
• Rust, water, or leak detection dye inside the compressor.
• Use of a refrigerant or lubricant not approved by Danfoss.
• Any deviation from recommended instructions of installation, application, or maintenance.
• Use in mobile applications.
• Use in an explosive atmospheric environment.
• No model number or serial number was transmitted with the warranty claim.

Disposal

• Danfoss recommends that condensing units and oil should be recycled by a suitable company at its site.

Dual Pressure Switch factory settings

Refrigerants| High-pressure settings (bar (g))| Low-pressure settings (bar (g))
---|---|---
ON| OFF| ON| OFF
R404A/R507/R448A/R449A/R452A| 23| 27| 2| 0.6
R134a/R513A| 13| 17| 2| 0.6

Dual Pressure switch – Refrigerant setting

Refrigerants| High-pressure settings (bar (g))| Low-pressure settings (bar (g))
---|---|---
ON| OFF| ON| OFF
R134a, R513A, R1234yf| 14| 17| 2| 0.6
R404A/R507, R452A| 24| 27| 2| 0.6
R448A/R449A| 22| 26| 2| 0.6

OP-LPQE048 – 068, OP-MPJE034 – 046 – 057

OP-LPQE067 – 084 – 098, OP-MPJE068 – 080 – 093 – 099 – 108

Code G (version W12): OP-MPJE034 & LPQE048 – 068

Code E (version W12) : OP-MPJE034 – 046 – 057; OP-LPQE048 – 068

Code E (version W12) : OP-MPJE068-080-099-108 & OP-LPQE067-084-098

Legend

BK| black| A1| Supply & phase reversal protection relay| F1| Fuse control circuit| K2| Compressor contactor
---|---|---|---|---|---|---|---
BU| blue| B1| Fan Speed Controller| F2| Overload relay| K3| Fan contactor
BN| brown| B2| DUAL Pressure Switch| F3| Fuse control circuit| Q1| Main switch
GY| grey| B3| Low-pressure switch| H1| Low-pressure alarms| R1,R2| Bleeder resistor
RD| red| B3| Fan Speed Controller| H2| High-pressure alarms| S1| Room thermostat
WH| white| C1| Start capacitor compressor| M1| Compressor| S2| Discharge gas thermostat
| | C2| Run capacitor compressor| M2| Fan motor| X1| Terminals
| | E1, E1* F1| Crankcase heater

Main switch

| K1, K1 K2| Contactor Start relay| Y1| Solenoid valve

Danfoss A/S

• Climate Solutions
• danfoss.com
• +45 7488 2222
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• Danfoss cannot accept any responsibility for possible errors in catalogs, brochures, videos, and other material.
• Danfoss reserves the right to alter its products without notice. This also applies to products ordered but not delivered provided that such alterations can be made without changes to the form, fit, or function of the product.
• All trademarks in this material are property of Danfoss A/S or Danfoss group companies. Danfoss and the Danfoss logo are trademarks of Danfoss A/S. All rights reserved.

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