FläktGroup Row-DENCO DRX 051 User manual

Row-DENCO®
OPERATION MANUAL

Table of Contents Row-DENCO
2FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications
1 Unit Identification Plate .............................................................. 4
2 Unit Type Code ............................................................................ 6
2.1 Indoor type code ...................................................................................... 6
2.2 Outdoor type code ................................................................................... 7
3 Overview of Units and Packaged Content ................................ 8
3.1 Documents enclosed with the unit ........................................................... 8
3.2 General characteristics ............................................................................ 8
3.3 Versions ................................................................................................. 11
3.4 Type of system ....................................................................................... 12
4 Safety and User Instructions ................................................... 14
4.1 Availability of the operation manual ....................................................... 14
4.2 Scope of the operation manual .............................................................. 14
4.3 Symbols used ........................................................................................ 14
4.4 Labelling of safety instructions ............................................................... 15
4.5 Used safety symbols .............................................................................. 16
4.6 Safety-conscious work procedures ........................................................ 17
4.7 Proper use ............................................................................................. 19
4.8 Safety devices ........................................................................................ 20
4.9 Modifications and changes .................................................................... 20
4.10 Spare parts ............................................................................................ 20
4.11 Disposal ................................................................................................. 20
4.12 Selection and qualification of personnel ................................................ 20
5 Technical Data ........................................................................... 21
5.1 Row-DENCO DX rack cooler ................................................................. 21
5.2 Row-DENCO CW rack cooler ................................................................ 22
5.3 Operating limits ...................................................................................... 22
6 Receipt, Transport and Handling ............................................. 23
6.1 Transport ................................................................................................ 23
6.2 Receiving the unit .................................................................................. 24
6.3 Storage .................................................................................................. 24
6.4 Standard packaging and packaging with wooden crate (optional) ......... 25
7 Dimensional Drawings .............................................................. 26
7.1 DRX 051-071-121 (300 X 1000 X 42U RACK) ...................................... 26
7.2 DRX 051-071-121 (300 X 1200 X 42U RACK) ...................................... 27
7.3 DRC 020-035 (300 X 1000 X 42U RACK) ............................................. 28
7.4 DRC 036 (300 X 1000 X 42U RACK) .................................................... 29
7.5 DRC 020-035 (300 X 1200 X 42U RACK) ............................................. 30
7.6 DRC 036 (300 X 1200 X 42U RACK) .................................................... 31
7.7 DROU 051 and DROU 071 .................................................................... 32
7.8 DROU 121 ............................................................................................. 33
8 Installation ................................................................................. 34
8.1 Overview Diagram ................................................................................. 34
8.2 Install Row-DENCO ............................................................................... 37
8.3 Connection of the refrigeration circuit to the external evaporator (on-site) .
38
8.4 Refrigerant connections (DRX/DROU) .................................................. 41
8.5 Water connections (DRC) ...................................................................... 45

Row-DENCO Table of Contens
FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications 3
9 Electrical Connection ............................................................... 49
9.1 Requirements ......................................................................................... 49
9.2 DRX Connection Configuration .............................................................. 54
9.3 DRC connection configuration ................................................................ 55
9.4 Electrical specifications ........................................................................... 56
10 Commissioning and Testing .................................................... 57
10.1 Evacuation .............................................................................................. 57
10.2 Charging ................................................................................................. 58
10.3 Preparing for first start up ....................................................................... 58
10.4 Condensate drain ................................................................................... 61
10.5 Instruments and alarms .......................................................................... 61
10.6 Calibrating the control and safety devices .............................................. 61
10.7 Calibrating the dirty filter sensor ............................................................. 61
10.8 Modulating water valve ........................................................................... 62
10.9 2-Way valve shut off ............................................................................... 64
10.10 2-Way ON/OFF valve (optional) ............................................................. 65
10.11 Temperature and Hhumidity Pprobe (option DRZ-3HSENA.E04) .......... 65
10.12 Energy monitoring (optional) ................................................................... 66
10.13 Dual power supply (optional) .................................................................. 66
10.14 Humidifier ................................................................................................ 67
10.15 Maintenance ........................................................................................... 72
11 Maintenance .............................................................................. 74
11.1 Cleaning the air filter ............................................................................... 74
11.2 Checking and cleaning the condenser coils ........................................... 74
11.3 Checking and cleaning the drains ........................................................... 75
11.4 General examination of operation ........................................................... 75
11.5 Visual check of the condition of the pressurised containers ................... 75
12 Troubleshooting ........................................................................ 76
13 Dismantling and Disposal ........................................................ 80
13.1 Dismantling ............................................................................................. 80
13.2 Disposal .................................................................................................. 81
Log Book for Chiller, Heat Pumps and Compressor/Condenser Units ... 82
PROTECTION NOTICES
The reproduction, distribution and utilization of this document as well as the communication of its contents
to others without express authorization is prohibited. Offenders will be held liable for the payment of dama-
ges. All rights reserved in the event of the grant of a patent, utility model or design.

Unit Identification Plate Row-DENCO
4FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications
1 Unit Identification Plate
The unit identification plate is secured on the unit and is explained as follows. Enter the
data from the unit identification plate in the operation manual. This record establishes
the relationship between the unit and the operation manual. If this condition is met, the
operation manual can then be used to enter test and inspection data for your unit.
Fig. 1-1
The Row-DENCO rating plate is positioned on a panel inside the unit, and provides the
following information:
– model and serial number of the unit
– power supply (voltage, phases and frequency)
– power consumption of the unit
– current draw of the unit: FLI (Full Load Input), FLA (Full Load Current) and LRA
(Locked Rotor Current)
FläktGroup Deutschland GmbH
FläktGroup Deutschland GmbH
Company name
Max. operating pressure
high and low pressure side
Max. operating pressure on water
side
Drawing number of wiring diagram
Company logo
Unit type
Item number
Serial Number
Year of manufacture
Operating weight
Refrigerant
Refrigerant charge volume
Oil type
Power supply
Max. power consumption
Max. current consumption
Max. storage
and shipping temperature

Row-DENCO Unit Identification Plate
FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications 5
The DROU condensing units can be identified by the:
Packaging label
Showing the data identifying the product.
Rating plate
Showing the unit technical and performance data. If this is lost, ask After Sales Service
for a replacement.
NOTE!
Tampering with or the removal or absence of rating plates or other means enabling
the unit to be identified causes problems during installation and maintenance.

Unit Type Code Row-DENCO
6FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications
2 Unit Type Code
2.1 Indoor type code
Row-DENCO DR X 3 0XX A 5
Product range Cooling system Dimension Unit size Series Power supply
DR Row-DENCO
CChilled water
XSplit system
3Width of unit x 100 mm
020 only DRC version
025 only DRC version
035 only DRC version
036 only DRC version
051 only DRX version
071 only DRX version
121 only DRX version
ASeries
5230 V/1Ph/50 Hz

Row-DENCO Unit Type Code
FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications 7
2.2 Outdoor type code
Row-DENCO DROUD121A1.W
Product range Key outdoor unit Outdoor system Refrigerant Unit size Series Power supply Version
DR Row-DENCO
OOutdoor units
UCondensing Unit
DR-410A
051
071
121
ASeries
1400 V/3Ph/+N/50 Hz - only Unit size 071-121
5230 V/1Ph/+N/50 Hz - only Unit size 051
.N Standard version
.W Winter-Kit down to -35 °C ambient
NOTE!
For detailed planning please only use the order-related documentation. Detailed
dimensional drawings can be obtained on request from your relevant FläktGroup
sales office. Specifications and technical data are subject to regular updates. The
manufacturer reserves the right to make necessary changes to information without
prior written notice.

Overview of Units and Packaged Content Row-DENCO
8FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications
3 Overview of Units and Packaged Content
3.1 Documents enclosed with the unit
Each unit is delivered complete with the following documents:
–Row-DENCO installation, user and maintenance manual
– Wwiring diagram
– list of spare parts
– CE declaration with list of European directives and standards that the unit is com-
pliant with
– warranty conditions
3.2 General characteristics
3.2.1 Row-DENCO indoor unit
Description of the unit
The Row-DENCO air-conditioning unit is an innovative and efficient system for mana-
ging hot spots in data centers, guaranteeing low energy consumption and possibility to
be used with HIGH DENSITY racks that generate extremely high loads, up to and over
40 kW/m² per rack. The use of the latest generation EC fans with brushless motors
ensures excellent performance in terms of low power consumption and low noise. N+1
dynamic management of the EC fans to optimise consumption and cooling system red-
undancy are available as standard.
On the Row-DENCO versions, the units are positioned in rows of RACKS, with a layout
so as to create cold aisles, where the cool air from the Rack Cooler is delivered, and
hot aisles, where the air heated by the electronic equipment housed in the RACKS is
discharged. These are individual units installed between the Racks in a row, so as to
absorb the local heat load of the servers.
On Row-DENCO versions, the air to be cooled is taken in at the rear of the unit directly
from the data center hot aisle (35 °C), giving considerable benefits in terms of both
energy efficiency and cooling capacity, before being cooled and then delivered into the
cold aisle (18-20 °C), in other words, at the front of the same rack where the air is taken
in.
Fig. 3-1
Structure
Extremely compact structure that reduces overall dimensions, made from galvanised
steel plate with RAL9002 epoxy powder coating. The panelling is coated with an inno-
vative double layer of plastic, is lined on the inside with special soundproofing material.
Fans
The use of latest generation 225 mm diameter radial fans with EC brushless motors
ensures excellent performance and low power consumption. N+1 dynamic manage-
ment of EC fans is featured as standard, allowing operation at reduced flow-rate to opti-
mise power consumption. Moreover, in the event of a fault on one fan, the other fans
are operated at maximum speed to ensure the same cooling performance.
The fan section has been designed to allow rapid replacement in the event of faults,
thus reducing system downtime.

Row-DENCO Overview of Units and Packaged Content
FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications 9
Filters
Regenerable polyester fibre filtering media (G2 efficiency) treated with synthetic resins,
supported by a frame with protective metal mesh. The filtering media is flame retar-
dant.
Air-Sources Heat Exchanger
Finned coil with large frontal surface area, made from mechanically expanded tubes
and aluminium fins with hydrophilic treatment and high heat transfer area. The coil is
placed upstream of the fans for optimum air distribution.
Electrical Ppanel
Built and wired in compliance with IEC 204-1/EN60204-1 standards, complete with fan
contactor and overload protection.
Microprocessor Control System
The microprocessor, by managing the compressor for the direct expansion unit and the
modulating 3-way valve for the water chiller, controls cooling capacity and operating
alarms, with the possibility of connection to supervisory systems.
Immersed Electrode Humidifier (optional)
Modulating steam production and automatic control of salt concentration in the water
tank to allow the use of untreated water.
3.2.2 Outdoor condensing unit
Description of the DROU unit
For direct expansion versions, the DROU outdoor condensing unit combined with the
DRX indoor unit, is aircooled with axial-flow fans, fitted with INVERTER-DRIVEN HER-
METIC SCROLL compressor for operation on R-410A refrigerant, mounted on rubber
vibration dampers, complete with oil pre-charge, supplied with oil separator to ensure
correct lubrication even at minimum speed, and fitted with thermal protector.
Structure
Powder coated metal plate base panelling and inside structure. Non-flammable closed
cell polyethylene foam thermal insulation and soundproofing on the inside.
Inverter-Driven compressors
High efficiency hermetic scroll compressor with brushless DC motor, complete with
thermal protector, with electronic capacity control managed by INVERTER. This ensu-
res unit operating efficiency even at part loads, which represent more than 75 % of nor-
mal operating time, meaning effective overall average energy savings of up to 50 %
compared to traditional ON/OFF technology. Mounted on rubber vibration dampers,
complete with sump heater, oil charge and oil separator to prevent migration of the gas
charge and ensure lubrication of the compressor sump during operation at minimum
speed. Complete with thermal protector and sump heater installed as standard on all
versions.
Electrical panel
Power and control electrical panel constructed in accordance with IEC 204-1/
EN60204-1, complete with control and terminal blocks for connection to the power sup-
ply and auxiliary controls.
Protection grille
The unit comes with a protection grill on the condenser coil.

Overview of Units and Packaged Content Row-DENCO
10 FläktGroup DC-2014-0106-GB 2019-02/R3 • Subject to modifications
Heat exchange coils
Made using copper tubes mechanically expanded onto aluminium fins with a high heat
exchange area.
Condenser fan
External impeller axial-flow fans, statically and dynamically balanced at low speed. Six-
or four-pole electric motor with built-in thermal cut-out. Housed in aerodynamic tubes
with accident prevention grill. Device for operation at low outside air temperatures: con-
tinuous fan speed control according using a pressure transducer. EC axial-flow fan
available as an option.
Fig. 3-2: Explo Outdoor Condensing Unit
1: Grille Protection for finned coil
2: Electrical panel
3: Gas valve
4: Scroll compressor
5: Fan
1
2
3
4
5