Danfoss VCH115 User guide

www.danfoss.com

Application Guide

Scroll compressors

VCH115

Single, R410A

Contents

Safety and warnings 4

Introduction 5

Product description 5

Cut Away VCH115 5

Vapor injection 5

Wet injection 6

Product identication 7

Name Plate 7

Nomenclature 7

Compressors serial number 7

Internal free volume 8

Refrigerants 9

General Information 9

R410A 9

Technical specication 10

Compressor size 10

Compressor specication 10

Sound and vibration data 11

Sound level and acoustic hood 11

Operating envelope data 12

Operating envelope 12

Dimensions 14

VCH115 14

VCH115 with IP54 E-Box 15

Mechanical connections 16

Connection Details 16

Design compressor mounting 16

System design generalities 17

Electrical connections 18

Wiring connections 18

Electrical specications 19

Scroll compressors, VCH115 | Contents

Frequency converter 21

Product identication 21

Technical specication 21

Dimensions 21

Electrical connections 22

Drive installation 23

Troubleshooting 24

Compressor and drive control 27

Application 32

Manage Operating enevlope 32

Manage sound and vibration 36

Oil return management 37

Manage Superheat 39

Manage o cycle migration 42

Assembly line procedure 44

Commissioning 47

Dismantle and disposal 48

Packaging 49

Single pack 49

Industrial pack 49

Frequency converter single pack 49

Ordering 50

Single pack 50

Industrial pack 50

Voltage code G-380 Volt 50

Accessories and Spare parts 51

Acoustic hoods - Lubricant, acoustic hoods and spare parts 51

E-box Plug 51

Mounting kits 51

Terminal boxes, covers & T-block connectors 51

Lubricant / oils 51

Spare parts for frequency converter 51

Discharge thermostats and sensors 51

Online support 52

Scroll compressors, VCH115 | Contents

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.

This icon indicates instructions to avoid reliability risk.

The purpose of this guideline is informational, with the intent to educate customers as to how the compressors

should properly function. If you need any additional assistance, please contact Danfoss Technichal Support. In any

case, Danfoss manufacturing accepts no liability as a result of misuse or improper integration of the compressor

unit.

Scroll compressors, VCH115 | Safety and warnings

Danfoss

CA-000001

Optimize scroll sets PR, combine vapor injection,

and optimize eciency in heat pump application

Increase injection pipe diameter, and reduce pipe

vibration

Optimize structure design, reduce compressor

acoustic at high speed

New designed high eciency motor, improve

eciency at Part- load condition

Oil strainer reduce the oil stirring when

compressor running

Compact compressor outline design, benecial for

system unit layout

Introduction

Product description

Danfoss scroll compressor VCH115 for R410A is optimized for China low ambient heat pump and modular chiller

application.

Cut Away VCH115

Figure 1: Cut Away VCH115

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:

• Operating envelope enlargement by reduction of resulting discharge temperature.

• Cooling capacity and cooling eciency improvement by reduction of the liquid temperature before expansion

(Intermediate exchanger acting as economizer).

• Heat capacity and heating eciency improvement by increase of the massow at the condenser side (condenser

massow will be the sum of the evaporator massow and the injected massow).

The diagrams below explain the vapor injection principle, considering:

m inj: Injected massow

ΔT IntX: Dierence of temperature between the outlet of intermediate exchanger and the intermediate pressure

bubble point.

Scroll compressors, VCH115 | Introduction

Pc (m + mInj)

Inj SH

SHΔT IntX

mInj

CC-000546

Pressure

Enthalpy

EXV

CC-000547

Sol v

EXV

Control

(Injec SH)

Condenser

Evaporator

Intermediate Exchanger

Suct SH: Superheat at compressor suction.

Inj SH: Superheat of injected gas (at intermediate pressure).

SC: Subcooling at intermediate exchanger inlet.

For system with vapor injection we should also consider, in addition of the suction superheat and the condenser

subcooling, the injection superheat and Intermediate exchanger DeltaT as key inuent parameters on the

compressor performance.

The injection massow must be regulated through an EXV piloted by the injection superheat which must be above

5 K.

It is recommended to install an additional solenoid valve on the injection line to prevent the refrigerant to come

back directly into the compressor scroll set in case of power shortage.

The vapor injection must not be activated during defrost course.

Wet injection

Whenever the vapor is no longer enough to cool the scroll and the application requires more envelope then the

controller must reduce the injection SH down to zero and control the injection by reading the compressor DGT. This

part is called wet (to dierentiate from liquid). There is no gain in eciency and capacity, only envelope.

Considering the distance between sensor and scroll set, the wet injection is activated for when discharge

temperature exceeds 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).

Scroll compressors, VCH115 | Introduction

中国制造

型号 : VCH115DGENA

序列号 : MK2500000123 380 V3 ~ 50 Hz

连接 CDC100 变频器

热电保护系统

设计压力

压力

最高温度

最低温度

容量

润滑剂 :P.O.E. 160SZ

低压高压

33.3 bar

55 °C

-35 °C

10.6 L

频率 :90-420 Hz

速度 :30-140 rps

最大运行电流 : 65A

48.7 bar

150 °C

-35 °C

0.85 L

2021

制冷剂: R410A

876543210

受国内外专利保护

注意：变频压缩机只能丹佛斯认证过的变频器供电

Danfoss A/S, 6430 Nordborg, Denmark

Model number

Serial number

Refrigerant

Supply voltage to CDC frequency converter

Housing service pressure

Factory charged lubricant

Compressor frequency & Max operating current

Product identication

Name Plate

Figure 2: Name Plate

Nomenclature

The example below presents the compressor nomenclature which equals the technical reference as shown on the

compressor nameplate. Code numbers for ordering are listed in section Ordering.

ANEGD115C HV

Variable speed

Family

VCH scroll,

for China market

Lubricant

POE lubricant,

R410A refrigerant

Swept volume

in cm³/rev

Design pressure ratio

D: Vapor injection,

heating optimized

Evolution index

Motor protection type

N: no internal motor protection

(protection by drive)

Equipement version

E: brazed connection, no oil sight glass,

IP22 E-box

F: brazed connection, no oil sight glass,

IP54 E-Box

Motor voltage code to CDC100*

G: 380 V/ 3~ / 50 Hz

* main supply voltage to frequency converter

Compressors serial number

Year code 8 Digit serial number

12345678A 25B

Plant assembly line code

Month code

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

April

Wuqing ,China

1994, 2014

May

1995, 2015

June

1996, 2016

July

1997, 2017

August

1998, 2018

September

1999, 2019

October

2000, 2020

November

2001, 2021

December

2002, 2022

2003, 2023

2004, 2024

2005, 2025

2006, 2026

2007, 2027

2008, 2028

2009, 2029

Internal free volume

Table 2: Internal free volume

Products

Internal free volume at LP side without oil

litre

cu.inch

VCH115

10.6

647

Scroll compressors, VCH115 | Product identication

Refrigerants

General Information

When choosing a refrigerant, dierent aspects must be taken into consideration:

• Legislation (now and in the future)

• Safety

• Application envelope in relation to expected running conditions

• Compressor capacity and eciency

• Compressor manufacturer recommendations & Guidelines

Additional points could inuence the nal choice:

• Environmental considerations

• Standardisation of refrigerants and lubricants

• Refrigerant cost

• Refrigerant availability

R410A

R410A is a HFC blend (R32: 50%; R125: 50%) with a zero Ozone Depletion Potential (ODP=0) and a Global Warming

Potential of 1924/AR5 (2088/AR4). It is a near-azeotropic mixture with a temperature glide less than 0.2 K.

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.

Scroll compressors, VCH115 | Refrigerants

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.

Compressor specication

Table 3: Compressor specication

Com‐

pressor

model

Swept volume

Displacement

Oil charge

Net weight

30 rps

60 rps

90 rps

120 rps

140 rps

cm3/rev

cu.in/rev

m³/h

cu.ft/h

m³/h

cu.ft/h

m³/h

cu.ft/h

m³/h

cu.ft/h

m³/h

cu.ft/h

dm³

lbs

VCH115

115

7.01

12.42

438

24.84

877

37.26

1315

49.68

1754

57.96

2046

3.3

128

136

Scroll compressors, VCH115 | Technical specication

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