Danfoss VCH115 Application Manual
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Danfoss VCH115 Application Manual

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Application Guide
Scroll compressors
VCH115
Single, R410A
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Summary of Contents for Danfoss VCH115

  • Page 1 Application Guide Scroll compressors VCH115 Single, R410A www.danfoss.com...

  • Page 2: Table Of Contents

    Sound level and acoustic hood Operating envelope data Operating envelope Dimensions VCH115 VCH115 with IP54 E-Box Mechanical connections Connection Details Design compressor mounting System design generalities Electrical connections Wiring connections Electrical speci cations © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 2...
  • Page 3 Acoustic hoods - Lubricant, acoustic hoods and spare parts E-box Plug Mounting kits Terminal boxes, covers & T-block connectors Lubricant / oils Spare parts for frequency converter Discharge thermostats and sensors Online support © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 3...

  • Page 4: Safety And Warnings

    Scroll compressors, VCH115 | Safety and warnings Safety and warnings Danfoss scroll compressors are designed and manufactured with state of the art technology. There is an added emphasis placed on safety and reliability. Critical instructions are highlighted with the following icons: This icon indicates instructions to avoid safety risk.

  • Page 5: Introduction

    Compact compressor outline design, bene cial for system unit layout Vapor injection The VCH115 compressor is tted with an injection port that enables to carry out vapor injection by connecting an intermediate exchanger. This vapor injection will have three bene ts: •...

  • Page 6: Wet Injection

    121°C (250°F) at the measurement point (the surface of discharge pipe with 40mm away from the compressor discharge port). A minimum 4K (7.2°F) subcooling is necessary to ensure correct wet injection.Injection temperature set point is 130°C (266°F), maximum safety value is 135°C (275°F). © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 6...

  • Page 7: Product Identi Cation

    Scroll compressors, VCH115 | Product identi cation Product identi cation Name Plate Figure 2: Name Plate Model number Serial number 型号 : VCH115DGENA 中 国 制 造 Refrigerant 380 V3 ~ 50 Hz 序列号 : MK2500000123 连接 CDC100 变频器 热电保护系统...

  • Page 8: Internal Free Volume

    Scroll compressors, VCH115 | Product identi cation Table 1: Serial number code legend table Year code Month code Plant assembly line code Year Code Month Code Plant Code 1990, 2010 January Trévoux, France 1991, 2011 February 1992, 2012 March 1993, 2013...

  • Page 9: Refrigerants

    With its high net refrigeration e ect coupled to a high density, the R410A has appeared in last decade to be the preferred refrigerant for use in commercial air conditioners and heat pumps. © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 9...

  • Page 10: Technical Speci Cation

    Scroll compressors, VCH115 | Technical speci cation Technical speci cation Compressor size Compressor can be sized on peak load, for best applied cost, or optimal e ciency. For optimal e ciency, see our performance details in Coolselector software. For regular updates and detailed capacities, please refer to Coolselector®2.

  • Page 11: Sound And Vibration Data

    Scroll compressors, VCH115 | Sound and vibration data Sound and vibration data Typical sounds and vibrations in systems can be broken down into the following three categories: • Sound radiation (through air) • Mechanical vibrations (through parts and structure) • Gas pulsation (through refrigerant) The following sections focus on the causes and methods of mitigation for each of the above sources.

  • Page 12: Operating Envelope Data

    Scroll compressors, VCH115 | Operating envelope data Operating envelope data Operating envelope Figure 3: VCH115 envelop map (NO VI)- SSH5K Evaporating temperature (°F) 30-120rps 30-140rps Evaporating temperature (°C) Danfoss OE-000001 Figure 4: VCH115 envelop map (with VI)-SSH5K Evaporating temperature (°F)
  • Page 13 Scroll compressors, VCH115 | Operating envelope data Pressure settings Table 4: Pressure settings R410A Pressure settings bar (g) psi (g) Working pressure range low side 1.2~13.4 17~194 Working pressure range high side 9.8~41.6 142.3~603.6 Maximum high pressure safety switch setting Minimum low pressure safety switch setting 14.5...

  • Page 14: Dimensions

    Table 5: Dimensions for VCH115 Compressor Outline model drawing number VCH115 224.3 8.83 291.4 11.47 485.4 19.11 520.9 20.51 353.4 13.9 9.09 9.09 190.5 171.1 6.74 8560210 Also refer Grommets Wiring connections © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 14...

  • Page 15: Vch115 With Ip54 E-Box

    Scroll compressors, VCH115 | Dimensions VCH115 with IP54 E-Box Figure 6: Outline drawing Danfoss Di-8560250 Table 6: Dimensions for VCH115 with IP54 E-Box Compressor Outline model drawing number VCH115 with 224.3 8.83 291.4 11.47 485.4 19.11 520.9 20.51 353.4 13.9 9.09...

  • Page 16: Mechanical Connections

    The grommets must be compressed until contact between the at washer and the steel mounting sleeve is established. The required bolt size for the VCH115 compressor is HM8-40. This bolt must be tightened to a torque of 15 Nm (11 ft/lbs.).

  • Page 17: System Design Generalities

    The minimum compressor speed must be de ned according to unit need. It often makes sense to set unit minimum speed higher than minimum compressor speed quali ed by Danfoss. Di erences between variable speed and x in speed unit design Variable speed compressors were created with state of the art technology with the intent to be e cient and precise.

  • Page 18: Electrical Connections

    3 Nm. Use a 1/4" ring terminal on the power leads. For VCH115 model, a special Plug should be used on the E-Box before connecting the electric wire to protect against accidental contact with electrical parts inside and protect against the wire and E-Box hard contacting.

  • Page 19: Electrical Speci Cations

    Electrical speci cations IP rating VCH115 compressor terminal box IP rating according to IEC60529 is IP22 after installing the U Plug 120Z0852 on the E-Box. VCH115 with IP54 E-Box compressor terminal box IP rating according to IEC60529 is IP54 when correctly sized IP54 rated cable glands are used.
  • Page 20 If reverse rotation symptoms occur, shut the compressor down and connect the phases to their proper terminals. Allow the compressor to run and then check amps at operating condition versus Danfoss published performance data to see if there was damage.

  • Page 21: Frequency Converter

    Scroll compressors, VCH115 | Frequency converter Frequency converter Product identi cation Frequency converter nomenclature T/C:HLP-CDC 0030 XXXX XX A X XX VXXX Software version: Model name Example,V235 means Series software version V2.35 Power: 30kW Reserve Voltage: 3 phase, 380V Hardware version...

  • Page 22: Electrical Connections

    Scroll compressors, VCH115 | Frequency converter Figure 11: External and Installation Dimensions Electrical connections Wire sizes CC-000193 Power input From drive to to compressor From network to drive contactor Circuit breaker © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 22...

  • Page 23: Drive Installation

    Voltage code Mains voltage range of drive 380 (±10%)/ 3ph/ 50Hz Never connect the VCH115 compressor directly to the mains power supply in case of frequency converter defect. Drive voltage imbalance The maximum allowable voltage imbalance between each phase is 3%. Voltage imbalance causes high amperage over one or several phases, which in turn leads to overheating and possible drive damage.

  • Page 24: Troubleshooting

    Scroll compressors, VCH115 | Frequency converter • Ensure clearance limits above and below the drive for air circulation are respected. • The drive must be installed on a panel wall or on a back plate to ensure proper cooling. • Do not place the drive under direct sunlight.
  • Page 25 Scroll compressors, VCH115 | Frequency converter Check alarm # Motor phase Motor phase Motor phase U missing V missing M missing Most probably neither a drive or compressor failure Check the motor cable and reset the alarm Check alarm #...
  • Page 26 Scroll compressors, VCH115 | Frequency converter Check alarm # #68, #188, #189 Safe stop Mains failure Internal fault Others activated by HP (High Pressure) switch trip Power Check the code Return the drive shortage while number for inspection Reset high...

  • Page 27: Compressor And Drive Control

    Compressor start and stop, speed control Speed limit guarantees compressor reliability and must be respected. In drive control logic, default setting values have been quali ed by Danfoss. It is not recommended to change default values. © Danfoss | Climate Solutions | 2023.08...
  • Page 28 Scroll compressors, VCH115 | Frequency converter Figure 14: Start/Stop/Ramp setting Danfoss OE-000091 Target speed S (RPS) Ramp 1 ramp down time default 0.5rps/s* Target speed Start delay duration 60s Stopping ramp time default 45rps/s Starting ramp time default 45rps/s 0.67s...
  • Page 29 Scroll compressors, VCH115 | Frequency converter Figure 15: Short cycle protection CC-000212 (f ) Start signal is given by the unit controller Compressor started Compressor stop requested by the unit controller (f ) Start signal is given by the unit controller Start Command is ignored.
  • Page 30 Scroll compressors, VCH115 | Frequency converter Table 16: Trip lock Par. nr. Name Set value Default value 14-20 Reset Mode Automatic reset x10 Automatic reset x10 14-21 Automatic reset time Stop compressor in case of safeties (LP, HP, DGT) Table 17: Stop compressor in case of safeties (LP, HP, DGT)
  • Page 31 Scroll compressors, VCH115 | Frequency converter Figure 16: Unit remotely controlled External signal demand CC-000095 100% Compressor speed Time T(s) Table 18: Unit remotely controlled System demand request Example of prevention Demand request changing very fast and often from 0 to 100%...

  • Page 32: Application

    The solid line envelope is valid for a suction superheat within 5K (9°F) at nominal voltage. Higher suction superheat may lead to discharge temperatures above 135°C for VCH115 with R410A. Moreover, the discharge gas temperature must not exceed 135°C for VCH115.
  • Page 33 HP switch setting: HP1 = 38 bar (g) (62°C/143.6°F) Risk of operation beyond the application envelope. DGT protection required. Example 2 (R410A, SH = 6K/10.8°F) LP switch setting: LP2 = 4.6 bar (g) (-10.5°C/13.1°F) © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 33...
  • Page 34 (for example reduce compressor speed when reaching high pressure limit). Operation of VCH115 is not allowed across the envelope at all speeds. Depending on speed range needed and unit controller capability, two types of envelope controls can be considered:...
  • Page 35 Par. 3-03 Maximum reference 7200 rpm (120 rps). Envelope control The unit controller continuously measures evaporating and condensing temperatures in order to maintain the compressor within the envelope independently of compressor speed. © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 35...

  • Page 36: Manage Sound And Vibration

    Evaporating temperature (°C) Danfoss OE-000001 Manage sound and vibration Sound level The sound radiating from the compressor is emitted through the air, the sound waves travel in all directions from the compressor. © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 36...

  • Page 37: Oil Return Management

    Ensure that there is no direct contact between vibrating components and structure. Gas pulsation The Danfoss VCH scroll compressor has been designed and tested to ensure that gas pulsation is optimized for the most commonly encountered heat pump pressure ratio.
  • Page 38 Systems with reheat coils, multiple or split evaporator and/or condensers can be susceptible to oil logging. A means to empty or pump out circuitry when not engaged should be implemented to prevent oil logging. © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 38...

  • Page 39: Manage Superheat

    60s per event. Note: oil superheat criterion is mainly used during quali cation to con rm liquid ood back is acceptable. It is not mandatory to monitor it on production unit. © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 39...
  • Page 40 Scroll compressors, VCH115 | Application Oil superheat measurement during quali cation Figure 19: VCH115 R410A - Dilution chart (reference at 20°C / 68°F ambient temperature) Evaporating temperature °F 27.0 25.2 Safe Area 23.4 21.6 18.0 14.4 10.8 Unsafe area Max 60secs per event 7.20...
  • Page 41 1.8mm~2.0mm, this is up to the system unit design to get the balance between keeping oil return and avoiding too much refrigerant liquid return. The superheat measurement must be done before suction accumulator. © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 41...

  • Page 42: Manage O Cycle Migration

    Unit pre charge at OEM factory, no refrigerant piping done on eld To avoid condensed liquid refrigerant from draining back when the compressor is shut o , the condenser outlet must have an “upper loop” shape. © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 42...
  • Page 43 See Test and components required per application to know when to use heater Surface sump heater accessories are available from Danfoss (see section Accessories and Spare parts). 100W belt sump heater should be mounted on compressor shell to guarantee safe cold start-up even at the worst condition.

  • Page 44: Assembly Line Procedure

    • driers water content capacity, • system refrigeration capacity, • system refrigerant charge. For new installations of the compressors with POE oil, Danfoss recommends using the Danfoss DML (100% molecular sieve) solid core lter drier. Compressor storage Store the compressor in a manner that it is not corrosive or ammable atmosphere between -35°C to 70°C (-31°F to 158°F) when charged with nitrogen and between -35°C (-31°F) and 55°C (131 °F) when charged with R410A...
  • Page 45 • It is recommended to use double-tipped torch using acetylene to ensure a uniform heating of connection. • To enhance the resistance to rust, a varnish on the connection is recommended. © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 45...
  • Page 46 • Energized heaters improve moisture removal. • Alternate vacuum phases and break vacuum with Nitrogen to improve moisture removal. For more detailed information see “Vacuum pump-down and dehydration procedure” TI-026-0302. Refrigerant charging Initial charge: © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 46...

  • Page 47: Commissioning

    Do not use a megohm meter nor apply power to the compressor while it is under vacuum as this may cause internal damage. Commissioning Preliminary check Check electrical power supply: © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 47...

  • Page 48: Dismantle And Disposal

    • Crankcase heaters must be energized at least 6 hours in advance to remove refrigerant. • Correct oil level in compressor sump indicates proper oil return • Low foaming in sight glass and compressor sump temperature above 12K for VCH115 saturation temperature to show that there is no refrigerant migration taking place •...

  • Page 49: Packaging

    Frequency converter single pack Table 28: Frequency converter CDC100 single pack IP20 Drive power Drive supply voltage Height (H) Width (W) Depth (D) Weight (kW) (mm) (mm) (mm) (Kg) T4: Code G © Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 49...

  • Page 50: Ordering

    Scroll compressors, VCH115 | Ordering Ordering Danfoss scroll compressors can be ordered in either industrial packs or in single packs. Drive can be ordered in single packs. Please use the code numbers from below tables for ordering. Single pack Table 29: Single pack...

  • Page 51: Accessories And Spare Parts

    Scroll compressors, VCH115 | Accessories and Spare parts Accessories and Spare parts Acoustic hoods - Lubricant, acoustic hoods and spare parts Code no. Description Application Packaging Pack size 120Z0850 VCH115 acoustic hood Single pack 120Z0897 VCH115 with IP54 E-Box acoustic hood...

  • Page 52: Online Support

    Online support Danfoss o ers a wide range of support along with our products, including digital product information, software, mobile apps, and expert guidance. See the possibilities below. The Danfoss Product Store The Danfoss Product Store is your one-stop shop for everything product related—no matter where you are in the world or what area of the cooling industry you work in.

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