DTE CoolMaster L-Cube Series User manual

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [e-mail]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 1
Title: CoolMaster L-Cube Series
Document: Operating manual
Company: Dutch Thermal Engineering n.v.
Revision no.: D
Language: EN

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 2
INDEX
1DISCLAIMER.............................................................................................................................................................................................................3
2DECLARATION OF CONFORMITY* .............................................................................................................................................................................5
3SAFETY INSTRUCTIONS AND WARNINGS...................................................................................................................................................................7
3.1 WATER DRAINING,PACKING,TRANSPORT AND STORAGE INSTRUCTIONS OF DTE INSTALLATIONS .................................................................................................... 8
3.1.1 Draining water from the machine .................................................................................................................................................................... 8
3.1.2 Packing, transport and storage instructions..................................................................................................................................................... 8
3.2 CORRECT APPLICATIONS ................................................................................................................................................................................................... 9
3.3 APPLICATION AREA.......................................................................................................................................................................................................... 9
4GENERAL DESCRIPTION ..........................................................................................................................................................................................10
4.1 GENERAL DESCRIPTION COOLMASTER (K)(N)(NF)(NO)(NOF) ............................................................................................................................................. 10
4.2 GENERAL DESCRIPTION COOLMASTER (L)(O)(OF) .............................................................................................................................................................. 12
4.3 IDENTIFICATION............................................................................................................................................................................................................ 14
5COMMISSIONING...................................................................................................................................................................................................15
5.1 COMMISSIONING COOLMASTER (K)(N)(NF)(NO)(NOF)..................................................................................................................................................... 15
5.2 COMMISSIONING COOLMASTER (L)(O)(OF)...................................................................................................................................................................... 16
5.3 REFRIGERANT CIRCUIT WITH BALL VALVES COOLMASTER (L)(O)(OF)...................................................................................................................................... 18
5.4 GENERAL COOLMASTER (L)(O)(OF) ................................................................................................................................................................................ 19
5.5 CONNECTING COOLING WATER PIPES ................................................................................................................................................................................ 20
5.6 CONNECTING OVERFLOW PIPE ......................................................................................................................................................................................... 21
5.7 CONNECTING POWER SUPPLY .......................................................................................................................................................................................... 21
5.7.1 Plug-in terminals ............................................................................................................................................................................................ 22
5.7.2 Screw terminals .............................................................................................................................................................................................. 23
5.8 CONNECTING EXTERNAL CONTACTS .................................................................................................................................................................................. 24
5.9 WATER QUALITY ........................................................................................................................................................................................................... 24
5.10 FILLING OF (EXTERNAL)PIPES AND SYSTEMS COOLMASTER (K)(L) .......................................................................................................................................... 25
5.11 FILLING OF (EXTERNAL)PIPES AND SYSTEMS COOLMASTER (N)(NF)(NO)(NOF)(O)(OF)........................................................................................................... 26
5.12 FILLING OF THE SYSTEMS COOLMASTER (K)(L) ................................................................................................................................................................... 29
5.13 FILLING OF THE SYSTEMS COOLMASTER (N)(NF)(NO)(NOF)(O)(OF).................................................................................................................................... 30
5.14 DEAERATING................................................................................................................................................................................................................ 31
5.15 SETTING THERMOSTAT (IF APPLICABLE).............................................................................................................................................................................. 32
5.16 COMMISSIONING AFTER LONG STANDSTILL......................................................................................................................................................................... 33
6MEANING OF ALARMS (IF APPLICABLE) ..................................................................................................................................................................35
7FAULT ANALYSIS.....................................................................................................................................................................................................36
8MINIMUM INSPECTION-INTERVAL SCHEME............................................................................................................................................................37
9CLEANING OF THE MACHINE...................................................................................................................................................................................38
10 CHECKS..............................................................................................................................................................................................................39
11 SERVICE.............................................................................................................................................................................................................40
12 GUARANTEE ......................................................................................................................................................................................................40
13 REMOVAL..........................................................................................................................................................................................................40
14 APPENDIX..........................................................................................................................................................................................................41
14.1 CONNECTION DIAGRAM FILLING THE SYSTEM ...................................................................................................................................................................... 42
14.2 WATER TREATMENT ...................................................................................................................................................................................................... 43
14.3 GUIDELINE FOR WATER QUALITY IN DTE INSTALLATIONS....................................................................................................................................................... 44
14.4 USER MANUAL THERMOSTAT (IF APPLICABLE)* ................................................................................................................................................................... 45
14.5 SAFETY INFORMATION SHEETS ......................................................................................................................................................................................... 46
14.6 COMMENTS................................................................................................................................................................................................................. 54
14.7 TECHNICAL INFORMATION* ............................................................................................................................................................................................ 55
➢ Machine drawing ..................................................................................................................................................................................................... 55
➢ P&ID......................................................................................................................................................................................................................... 55
➢ Parts list ................................................................................................................................................................................................................... 55
➢ Electrical diagram .................................................................................................................................................................................................... 55
➢ User manual thermostat .......................................................................................................................................................................................... 55
➢ Safety data sheet refrigerant ................................................................................................................................................................................... 55
➢ Other ........................................................................................................................................................................................................................ 55
OPERATING MANUAL
EN

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 3
1 Disclaimer
The manufacturer reserves the right to change parts at any time to change, without prior or immediate notice to the customer. The contents of
this manual may also be changed without prior warning. This is an original manual, and is valid for the machine in its standard version. The
manufacturer can therefore not be held liable for any damages resulting from specifications that deviate from the standard version delivered to
you. For information on adjustments, maintenance and repair insofar as this guide does not provide it, please contact the technical department
of your supplier. This manual was drawn up with the greatest possible care, however the manufacturer cannot accept any liability for any errors
in this book or any consequences thereof. Finally, this manual is a personal and confidential communication to the user. No part of this
publication may be reproduced, copied, altered or transmitted in any form or in any manner whatsoever without written permission from Dutch
Thermal Engineering n.v.

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 4
2 Declaration of conformity*
EU declaration:
Manufacturer: D.T.E. n.v.
Address: Westerbroekstraat 18
7011 EX GAANDEREN / HOLLAND
Hereby certifies that:
The CoolMaster meets the requirements of the Machinery Directive
(Directive 2006/42/EC, as amended),
and the national legislation implementing this Directive;
Meets the provisions of the following other EC directives.
- 2014/35/EU Low voltage directive
- 2014/30/EU EMC-directive
- 2014/68/EU Pressure Equipment Directive (PED)
And certify that:
The following (parts of) harmonized standards are applied:
- NEN-EN-IEC 60204-1:2018
- NEN-EN-ISO 12100:2010
- NEN-EN 378-2:2016
- NEN-EN-ISO 13857:2019
The following (parts of) national technical standards and specifications are used:
- Regulation EU 517/2014.
Made in Gaanderen on 12-12-2018
………………………….
F.G.R. Geerdink
General Manager
*This is an example, the original declaration will delivered with the machine!

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 5
UKCA declaration:
Manufacturer: D.T.E. n.v.
Address: Westerbroekstraat 18
7011 EX GAANDEREN / HOLLAND
Hereby certifies that:
The CoolMaster meets the requirements of the Machinery Directive
(Directive Supply of Machinery (Safety) Regulations 2008, as amended),
and the national legislation implementing this Directive;
Meets the provisions of the following other UKCA directives:
- Electrical Equipment (Safety) Regulations 2016
- Electromagnetic Compatibility Regulations 2016
- Pressure Equipment (Safety) Regulations 2016
And certify that:
The following (parts of) harmonized standards are applied:
- NEN-EN-IEC 60204-1:2018
- NEN-EN-ISO 12100:2010
- NEN-EN 378-2:2016
- NEN-EN-ISO 13857:2019
The following (parts of) national technical standards and specifications are used:
- Regulation EU 517/2014.
Made in Gaanderen on 12-12-2018
………………………….
F.G.R. Geerdink
General Manager
*This is an example, the original declaration will delivered with the machine!

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 6
3 Safety instructions and warnings
Always observe the following safety instructions and warnings!
WARNING!
Warning of possible damage to the device, environment or user
WARNING!
Warning of electricity and / or current threat
WARNING!
Warning of possible entrapment hazard
Compliance with the technical manual is a prerequisite for fault-free operation and the honouring of any
warranty claims. Therefore please read the technical manual carefully before you start working with
your device! The manual must therefore be kept near the machine. The CoolMaster is under pressure
with a refrigerant, more information about this can be found in 14.5.
This user’s manual was written for types similar to DTE CoolMaster (K), (N), (NF), (NO), (NOF), (L),
(O), (OF), type machines. Therefore certain topics may not apply to your machine. For the same
reason, the images may differ slightly from how your machine actually looks. The machine drawing is
sent separately as an attachment with the correct dimensions and connections.

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 7
3.1 Water draining, packing, transport and storage instructions of DTE installations
These actions are general and have to been carried out, of course, if applicable for the
application by qualified personal!
3.1.1 Draining water from the machine
Step 1: Switch the main switch off.
Step 2: Close the filling connection (D1) (not present in machines, specified as CoolMaster
(N)(NO)(NOF)(O)(OF))
Step 3: Drain the Water tank of the cooling system by opening the ball valve.
Step 4: Dry clean all connections and water tank with a vacuum cleaner.
3.1.2 Packing, transport and storage instructions
Before packing, transport and storage, first follow the instructions of chapter 3.1.1 Draining
water from the machine.
Attention! Before transport the machine has to be protected with the delivered cardboard box or
has to be wrapped with bubble wrap. The machine has to be transported and stored vertically at
all times on its fundament on the provided pallet!
The machine has to be placed vertically on its fundament at all times.
Attention! In no way the machine can be stacked or overturned. This applies during transport
and storing as well during repairs and commissioning. Even when the machine is not used it
should be vertically at all times.
Attention! Not following these instruction can cause severe damage to the machine.
Always use the correct type of transportation equipment, such as a pallet truck and a forklift
truck.

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 8
3.2 Correct applications
The CoolMaster (K)(N)(NF)(L)(O)(OF) may only be kept inside a cool, well-ventilated, frost-free
building!
The CoolMaster (NO) is applicable for outdoor installation with ambient temperature until - 15°C by
preference under shelter.
The CoolMaster (NOF) is applicable for outdoor installation with ambient temperature until - 30°C by
preference under shelter.
The CoolMaster (K) is only suitable for tap water of drinking quality.
The CoolMaster (N)(NF)(OF)(NO)(NOF) is only suitable for tap water of drinking quality, mixing with
appropriate antifreeze (glycol) in suitable mixing ratio.
The CoolMaster (L) with external condenser is only suitable for tap water of drinking quality.
The CoolMaster (O)(OF) with external condenser is only suitable for water/glycol.
Information on the correct water-glycol ratio and the recommended type of glycol can be found on the
P&ID corresponding to the machine.
ATTENTION! The CoolMaster must always have at least 3 metres free airflow above it. With an
external condenser, this also applies to the condenser.
Attention! In no way the machine can be stacked or overturned. This during transport and
storing as well during repairs and commissioning. Even when the machine is not used it should
be perpendicular at all times.
Attention! Not following these instruction can cause big damage to the machine.
3.3 Application area
CAUTION! Application is prohibited:
- In explosive atmospheres.
- In environments with hazardous oils, acids, gases, fumes, substances, radiation, etc.
- Corrosive environment.

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 9
4 General description
4.1 General description CoolMaster (K)(N)(NF)(NO)(NOF)
The CoolMaster is a complete plug and play water cooler with integrated water cooler tank, pump,
condenser and controls. Is built for perfect cooling in closed industrial process water systems.
CoolMaster sample drawing range L1*:
*The machine drawing is sent separately as an attachment with the correct dimensions and connections!

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 10
A
=
Cooling water inlet, see P&ID
B
=
Cooling water outlet, see P&ID
C
=
Drainage water tank, see P&ID
C+E
=
Drainage/Overflow water tank, see P&ID
D1
=
Filling water connection, see P&ID
(not present in machines, specified as CoolMaster (N)(NO)(NOF)(O)(OF))
D2
=
Manual filling device
E
=
Overflow water tank, see P&ID
F
=
Bushing coupling electrical supply cable
G
=
Control panel
H
=
Incoming condenser air
I
=
Service panel / control box door
NOTE: WHEN THE MACHINE IS RUNNING THE SERVICE PANELS
SHOULD BE PLACED ON THE MACHINE AND CONTROL BOX DOORS
ARE CLOSED!
K
=
Outgoing condenser air
L
=
Legs, U-Profile
P
=
Sight glass
Maximum glycol/water level
Minimum glycol/water level
V
=
Refrigerant relief (if applicable), see P&ID

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 11
4.2 General description CoolMaster (L)(O)(OF)
The CoolMaster is a complete plug and play water cooler with integrated water cooler tank, pump,
external condenser and controls. Is built for perfect cooling in closed industrial process water systems.
CoolMaster sample drawing range L1*:
External condenser sample drawing range L1*:
*The machine drawing is sent separately as an attachment with the correct dimensions and connections!

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 12
A
=
Cooling water inlet, see P&ID
B
=
Cooling water outlet, see P&ID
C
=
Drainage water tank, see P&ID
C+E
=
Drainage/Overflow cooling section, see P&ID
D1
=
Filling water connection, see P&ID
(not present in machines, specified as CoolMaster (N)(NO)(NOF)(O)(OF))
D2/D3
=
Manual filling device, see P&ID
Z1
=
De-aeration water tank (if applicable), see P&ID
E
=
Overflow water tank, see P&ID
F
=
Bushing coupling electrical supply cable
G
=
Control panel
H
=
Incoming condenser air
I
=
Service panel / control box door
NOTE: WHEN THE MACHINE IS RUNNING THE SERVICE PANELS
SHOULD BE PLACED ON THE MACHINE AND CONTROL BOX DOORS
ARE CLOSED!
K
=
Outgoing condenser air
L
=
Legs, U-Profile
P
=
Hotgas pipe, see P&ID
Q
=
Liquid pipe, see P&ID
S
=
Sight glass
Maximum glycol/water level
Minimum glycol/water level
V
=
Refrigerant relief (if applicable), see P&ID

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 13
4.3 Identification
Standard Type plate:
The identification plate is located on the left side from the machine. (Figure 4.1)
A
=
Machine number/ serial number
Figure 4.1
B
=
Machine type
C
=
Voltage
D
=
Maximum Current
E
=
Number of phases
F
=
Frequency in Hz.
G
=
Refrigerant type
H
=
Refrigerant mass
I
=
Maximum ambient temperature
J
=
CO2 equivalent
K
=
GWP-values
L
=
Thermostat Temperature range
M
=
Maximum pressure
N
=
Compressor lubrication
O
=
Compressor oil volume
P
=
Built
Q
=
Weight
R
=
Cooling capacity
Type plate according 2014/68/EU PED-Directive and pressure equipment (Safety) Regulations 2016:
The identification plate is located on the left side from the machine. (Figure 4.2)
A
=
Machine number/ serial number
Figure 4.2
B
=
Machine type
C
=
Voltage
D
=
Maximum Current
E
=
Number of phases
F
=
Frequency in Hz.
G
=
Thermostat Temperature range
H
=
Maximum ambient temperature
I
=
Built
J
=
Weight
K
=
Cooling capacity
L
=
Category
M
=
Module
N
=
Product low pressure
O
=
Product high pressure
P
=
Product temperature
Q
=
GWP-values
R
=
Refrigerant type
S
=
Refrigerant mass
T
=
CO2 equivalent

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 14
5 Commissioning
5.1 Commissioning CoolMaster (K)(N)(NF)(NO)(NOF)
CAUTION! The installation work must be carried out by a certified professional!
Place the CoolMaster at a level position and at least 1 meter from a wall. For the correct operation of
the CoolMaster we recommend that you keep distance between the CoolMaster and the user as small
as possible.
The cooling water pipe between the CoolMaster and the user must be max. 20 metres.
CAUTION! The diameter of the pipes/tubes must correspond with the connections on the
CoolMaster.
See for the connections chapter 4.1 on the CoolMaster. For diameters see the corresponding
P&ID.
The tubes must be suitable for use in the same conditions as those for which the CoolMaster is
suitable (pressure and temperature). Consult the P&ID for this information.
The hoses MUST be reinforced with braided fibre to prevent kinking the hose.
CAUTION! When using metal pipes, the galvanic series of the materials used should be taken
into account to prevent corrosion.

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 15
5.2 Commissioning CoolMaster (L)(O)(OF)
CAUTION! The installation work must be carried out by a certified professional!
Place the CoolMaster at a level position and at least 1 meter from a wall. For the correct operation of
the CoolMaster we recommend that you keep distance between the CoolMaster and the user as small
as possible.
The cooling water pipe between the CoolMaster and the user must be max. 20 metres. We recommend
a max. distance between the CoolMaster and external condenser of 15 metres.
CAUTION! The diameter of the pipes/tubes must correspond with the connections on the
CoolMaster and external condenser.
See for the connections chapter 4.2 on the CoolMaster. For diameters see the corresponding P&ID.
The tubes must be suitable for use in the same conditions as those for which the CoolMaster is
suitable (pressure and temperature). Consult the P&ID for this information.
The hoses MUST be reinforced with braided fibre to prevent kinking the hose.
For connect the pipes like ball valves, see 5.3.
CAUTION! When using metal pipes, the galvanic series of the materials used should be taken
into account to prevent corrosion.

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 16
Place the external condenser at a platform or a roof at a level position. The airflow direction of the
condenser depends on which type external condenser installation. The space around the condenser
can be calculated Figure 5.1 and Figure 5.2.
Horizontal installation external condenser:
Vertical installation external condenser:
Place the external condenser at a level position and at least 1 meter from a wall.
Figure 5.1
Figure 5.2

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 17
5.3 Refrigerant circuit with ball valves CoolMaster (L)(O)(OF)
Connect the hot gas (P) and the liquid (Q) pipes.
NOTE! The CoolMaster and the external condenser are already factory filled with the right
amount of refrigerant. The connection should only be made by specialized cool technical
engineers.
Do not open the ball valves when the connections are not correctly made! Open the ball valves
after vacuuming!
NOTE! The system is under pressure.
We recommend checking the connection for leaks after this installation.

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 18
5.4 General CoolMaster (L)(O)(OF)
In case the vertical distance between the external condenser and the CoolMaster is more than 3
meters there should be provide an so called “Oil trap” in the hot gas pipes. At every next difference in
level of 9 meters there should be provide an extra Oil trap. (See drawing)
The external condenser must be set up at the same height or higher than the CoolMaster.
NOTE! The connection between CoolMaster and the external condenser should not exceed 15 meters!
(for piping diameters, see P&ID)
NOTE! THE PIPES BETWEEN THE CoolMaster AND THE EXTERNAL CONDENSER CAN BE HOT!
If these pipes accidentally can be touched it is recommendable to isolate these pipes.
Connect the electrical cable(s) from the CoolMaster to the control switch (S) and fan(s) at the
condenser. These cable(s) may not touch the hot gas (P) and the liquid pipes (Q) of the
condenser, as these pipes could be very hot!
The cable(s) are already connected at the CoolMaster.
For the connection of these cable(s), see electrical diagram.
Switch on main switch on control panel (G) to enable the crankcase heating of the compressors.
At the first start up is not allowed to switch the CoolMaster immediately on by means of the control
switch. There must be a delay time of at least 24 hours before the CoolMaster is switched on for the
first time by means of the control switch or external start/stop. During this period the sump heater will
evaporate the coolant out of the sump oil of the compressor.
NOTE! The CoolMaster may not be switched off by means of the main switch, due to the
crankcase heating which will be switched off.
To prevent serious damage to the CoolMaster, the crankcase heating may never be switched off.
When the CoolMaster is to be switched off, it must be done by means of the control switch
which is located at the control panel (G).
EVEN ON LONG TERMS OF STANDSTILL!
WARNING! In case of shutdown with control switch all parts in the control box will still be under
tension.
If this will result into hazardous situations, in example maintenance to the CoolMaster, the
CoolMaster needs to be switched off with the main switch.
NOTE! The Crankcase heating may also apply for CoolMaster (K)(N)(NF)(NO)(NOF).

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 19
5.5 Connecting cooling water pipes1
Attention! Before making any connections to the
CoolMaster, clean the external pipes. Dirt must be
prevented from entering the CoolMaster. It may cause
serious damage to the system and the CoolMaster.
Connect the following pipes:
- A and B: cooling water pipes between CoolMaster and the
user.
- D1: If you wish to fill automatically
(does not apply to machinery specified as CoolMaster
(N)(NO)(NOF)(O)(OF)).
Step 1:
1. Install the ball valve (BVS-1) on the cooling water inlet (A).
2. Install cooling water pipe between CoolMaster (BVS-1) and
User. (See Figure 5.3)
The ball valve (BVS-1) must be kept closed, unless otherwise
indicated!
Step 2:
1. Install the ball valve (BVS-2) on the cooling water outlet (B).
2. Install the ball valve (BVS-3) on the T-piece (central
section).
3. Install the cooling water pipe between CoolMaster
(on the T-piece) and the user. (See Figure 5.4)
The ball valves (BVS-2 and BVS-3) must be kept closed,
unless otherwise indicated!
Step 3:
1. Connect the cooling water pipes between CoolMaster and
user (BVS-1 and BVS-3). (See §14.1)
2. Connect D1 to a water tap if you wish to fill
automatically.
(does not apply to machinery specified as CoolMaster
(N)(NO)(NOF)(O)(OF))
Figure 5.3
Figure 5.4
1Ball valves are not supplied as standard.

T h e N e t h e r l a n d s
w w w . d t e . e u
Dutch Thermal Engineering n.v.
Westerbroekstraat 18
7011 EX Gaanderen
Phone : [phone]
E-mail : [email protected]
Specialist in:
Industrial ….Cooling
….Heating
….Tempering
….Heat Recovery
Revision no.: D Operating manual - CoolMaster L-Cube Series Page 20
5.6 Connecting overflow pipe
Connect the overflow pipe (C+E). To enable good outflow of superfluous water, the overflow pipe must
be able to flow out into the open sewer without any foreseeable obstructions. The length of the overflow
pipe should be kept to a minimum. The pipe should also flow downwards, from the perspective of the
CoolMaster (C+E).
CAUTION! For machines filled with a mixture of water and glycol
(machines specified as CoolMaster (N)(NO)(NOF)(O)(OF) the excess mix from connection (E)
may not be discharged into public sewers for environmental reasons.
Connect refrigerant relief (V). This connection is an safety valve which blows off refrigerant in unusual
extreme conditions. Because refrigerant results to asphyxiation, the refrigerant relief (V) must be
connected to the open air at a position where it is not dangerous! The refrigerant relief between the
CoolMaster and the open air should be fixed tightly and must not be longer than 20 meters. The
minimum internal diameter must correspond with the diameter of connection on the CoolMaster.
(if applicable)
5.7 Connecting power supply
Attention! Work may only be carried out on the electrical installation of the CoolMaster by an
authorised, professionally competent person.
Attention! The CoolMaster must only be connected to a clockwise rotary field.
Turn off the main switch on the control panel (G).
Connect your electrical power supply cable to the appropriate terminals in the control box via the cable
entry (F). Refer to the electro-technical diagram for the connection of the cable cores. Consult the
diagram number as stated on the P&ID corresponding to the serial number of the CoolMaster.
Consult the type plate for the correct voltage.
Attention! Ensure the voltage as stated on the type plate is also the voltage on each phase wire.
Of no less importance is the mains frequency (50 or 60 Hz) corresponding to the frequency on the type
plate. The maximum voltage deviation is +6% and –10% from the voltage indicated on the type plate