Danfoss OP-LPQE/MPJE Optyma Slim Pack Condensing Units Instructions

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Instructions
Optima™ Slim Pack OP-LPQE/MPJE

OP-LPQE/MPJE Optimal Slim Pack Condensing Units

Name plate

• For exact values please refer name plate in unit

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 bar code
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Installation and servicing of the condensing units by qualified personnel only. Follow these instructions and sound refrigeration engineering practice 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 regulation) 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
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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 version control table
8| Voltage code
G = Compressor 230V/1 N—/50Hz, fan 230V/1—/50Hz E = Compressor 400V/3N—/50Hz, fan 230V/1-501-1z

Version control

Introduction

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

The condensing unit includes following:

• Scroll/reciprocating compressor
• Microchannel heat exchanger
• Dual pressure switches
• Service valves suction/ liquid
• Weather proof 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 version control for components 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 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 a flammable atmosphere
Place the unit in such a way 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 picture1 for minimal values of distance to walls.
• Avoid installing the unit in locations which are daily exposed to direct sunshine for longer periods.
• Avoid installing the unit in aggressive and dusty environments.
• Ensure a foundation with horizontal surface (less than 3° slope), 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 compressor is eliminated.

Installation

• The installation in which the condensing unit is installed must comply to EEC Pressure directive (PED) no. 2014/68/EU. The condensing unit itself is not a ”unit” in the scope 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 technique 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 power supply can not be switched on during installation.
• All electrical components must be selected as per local standards and unit requirements.
• Refer to wiring diagram for electrical connections 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 provides 230V a.c. alarm signals (max.50VA) in case of activation. Is also  quipped with phase sequence relay to protect the unit against phase loss/sequence/asymmetry and under-/over-voltage.

For units with a 3-phase scroll compressor, correct phase sequence for compressor rotation direction shall be observed.

• Determine the phase sequence by using a phase meter in order 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 section “Spare parts & accessories”.

Safety

Fusible Plug is not available in unit, it is replaced with adapter plug.
Unit has liquid receiver with an Adapter Plug with 3/8” NPT connection. installer/end user can select various options as mentioned in EN378-2 : 2016 Article § 6.2.2.3

• Optyma Slim Pack (W12 version only) fitted with atmospheric pressure relief valve. Don’t connect any tube at end of the pressure relief valve.

• Optyma 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 pressure relief valve opens, Danfoss recommended to replace new pressure relief valve.

• The unit/installation into which the condensing unit is mounted/integrated, must be in accordance with the PED.

• Beware of hot and extremely cold components.

• Beware of moving components. 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 compressors label for type of oil.
• Use only the refrigerant for which the unit is designed for.
• Fill the refrigerant in 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 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 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 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 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 following phenomena; unit doesn’t start, the compressor doesn’t build up pressure, it has abnormally high sound level and  abnormally low power consumption. In such 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 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 risk of slugging.
• When a sight glass is provided observe the oil level at start and during operation to confirm that the oil level remains visible.
• Respect the operating limits.
• Check all tubes for abnormal vibration. Movements in excess of 1.5 mm require corrective measures such as tube brackets.
• When needed, additional refrigerant in liquid phase may be added in 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 to atmosphere.
• Before leaving the installation site, carry out a general installation inspection regarding cleanliness, noise and leak detection.
• Record type and amount of refrigerant charge as well as operating conditions as a reference for future inspections.

Maintenance

Always switch off the unit at main switch before remove 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, 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 main switch before remove any panel from the condensing unit.
• Remove surface dirt, leaves, fibres, 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 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 pertaining to installation, application or maintenance.
• Use in mobile applications.
• Use in explosive atmospheric environment.
• No model number or serial number 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
BU
BN
GY
RD
WH| black
blue
brown
grey
red
white| A1
B1
B2
B3
B3
C1
C2
E1, E1
F1| Supply & phase reversal protection relay
Fan Speed Controller
DUAL Pressure Switch
Low pressure switch
Fan Speed Controller
Start capacitor compressor
Run capacitor compressor
Crankcase heater Main switch| F1
F2
F3
H1
H2
M1
M2
K1, K1
K2| Fuse control circuit
Overload relay
Fuse control circuit
Low pressure alarms
High pressure alarms
Compressor
Fan motor
Contactor
Start relay| K2
K3
Q1
R1, R2
S1
S2
X1
Y1*| Compressor contactor
Fan contactor
Main switch
Bleeder resistor
Room thermostat
Discharge gas thermostat
Terminals
Solenoid valve
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Danfoss A/S
Climate Solutions • danfoss.com • +45 7488 2222
Any information, including, but not limited to information on selection of product, its application or use, product design, weight, dimensions, capacity or any other technical data in product manuals, catalogues descriptions, advertisements, etc. and whether made available in writing, orally, electronically, online or via download, shall be considered informative, and is only binding if and to the extent, explicit reference is made in a quotation or order confirmation. Danfoss cannot accept any responsibility for possible errors in catalogues, 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 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.

AN363632996018en-ZA0202 – 118A2220C
© Danfoss Climate Solutions 2023.05

Documents / Resources

| Danfoss OP-LPQE/MPJE Optyma Slim Pack Condensing Units [pdf] Instructions
OP-LPQE MPJE Optyma Slim Pack Condensing Units, OP-LPQE MPJE, Optyma Slim Pack Condensing Units, Condensing Units
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