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
© Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 2

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
© Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 3

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 | Climate Solutions | 2023.08 AB392939083370en-000202 | 4

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Danfoss CA-000001
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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.
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Scroll compressors, VCH115 | Introduction

P
Pc (m + mInj)
Inj SH
SHΔT IntX
SC
mInj
m
Pi
Pe
E
CC-000546
P
E
Pressure
Enthalpy
EXV
E
CC-000547
C
Sol v
EXV
Control
(Injec SH)
IE
C
E
IE
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
© Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 6

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
I
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
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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
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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
A
January
A
Trévoux, France
11
1991, 2011
B
February
B
1992, 2012
C
March
C
1993, 2013
D
April
D
Wuqing ,China
25
1994, 2014
E
May
E
1995, 2015
F
June
F
1996, 2016
G
July
G
1997, 2017
H
August
H
1998, 2018
J
September
J
1999, 2019
K
October
K
2000, 2020
L
November
L
2001, 2021
M
December
M
2002, 2022
N
2003, 2023
P
2004, 2024
Q
2005, 2025
R
2006, 2026
S
2007, 2027
T
2008, 2028
U
2009, 2029
V
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
© Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 8

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.
© Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 9
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
oz
kg
lbs
VCH115
115
7.01
12.42
438
24.84
877
37.26
1315
49.68
1754
57.96
2046
3.3
128
62
136
Scroll compressors, VCH115 | Technical specication
© Danfoss | Climate Solutions | 2023.08 AB392939083370en-000202 | 10