Reznor COLDAIR WA Series Supplement

MANUAL PART NO. 703500
INSTALLATION & SERVICE MANUAL
COLDAIR WA, RA & RC
EVAPORATIVE COOLERS
Please read this document carefully before commencing installation, commissioning and/or servicing.
Leave it with the end user/site agent to be placed in their premises technical file after installation.
WARNING
This equipment must be installed and maintained in accordance with any relevant obligations arising from the Health and Safety at
Work Act 1974 or relevant codes of practice. In addition the installation must be carried out in accordance with the current IEE wiring
regulations (BS 7671) and any other relevant British Standards and Codes of Practice by a qualified installer.
All external wiring MUST comply with the current IEE wiring regulations

Page 2 Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A
Document Index
GENERAL INFORMATION ...................................... ..4
User Information...................................................... ..4
SECTION 1 – TECHNICAL INFORMATION.............. ..4
1.1 Machine identification data................................ ..4
1.2 Introduction....................................................... ..4
1.3 Technical information......................................... ..5
1.4 Warnings ........................................................... ..6
1.5 Control Panels ................................................... ..6
1.6 Improper use ..................................................... ..6
SECTION 2 – DIMENSIONS .................................... ..7
2.1 RA100 ............................................................... ..7
2.2 RA200 ............................................................... ..7
2.3 RC100 ............................................................... ..8
2.4 RC200 ............................................................... ..8
2.5 WA100/150....................................................... ..9
SECTION 3 – PACKAGING, HANDLING AND
TRANSPORTATION................................................. 9
3.1 Delivery of the unit ............................................ ..9
3.2 Handling and transportation .............................. ..9
3.3 Lifting ................................................................ 10
3.3.1 Lifting with fork lift .................................. 12
3.3.2 Lifting with cables.................................... 12
3.4 Unpacking the equipment.................................. 10
3.5 Storage10
SECTION 4 – INSTALLATION ................................... 11
4.1 General Warnings WA evaporative cooling units 11
4.2 Positioning and Installation of the WA
evaporative cooling units ................................... 11
4.2.1 Wall installation ....................................... 11
4.2.2 Window installation................................. 11
4.3 General Warnings RA & RC evaporative
cooling units...................................................... 12
4.4 Positioning and Installation of the RA/RC
evaporative cooling units ................................... 12
4.4.1 RA roof installation .................................. 12
4.4.2 RC roof installation .................................. 14
4.4.3 RC wall window installation..................... 15
4.4.4 RA wall window installation..................... 15
4.5 Installation......................................................... 16
4.6 Connection to the power supply........................ 16
4.7 Wiring diagrams ................................................ 17
4.7.1 Control panel with Temperature probe..... 17
4.7.2 Schematic wiring RA150.......................... 18
4.7.3 Schematic wiring RA200.......................... 18
4.7.4 Schematic wiring RC100.......................... 19
4.7.5 Schematic wiring RC200.......................... 20
4.7.6 Multiple coolers ....................................... 21
4.7.7 Multiple coolers via Router....................... 22
4.7.8 Multiple coolers via two Routers .............. 23
4.8 Connection to the water supply......................... 24
SECTION 5 – HEALTH AND SAFETY ...................... 24
5.1 Protection devices.............................................. 24
5.2 Clothing ............................................................ 24
5.3 Residual risks ..................................................... 24
5.4 Emergency situations ......................................... 24
SECTION 6 – USER INSTRUCTIONS ....................... 25
6.1 General.............................................................. 25
6.2 First start-up ...................................................... 25
6.3 Remote Command Unit ..................................... 26
6.3.1 Command and signal descriptions.................. 26
6.3.1.1 Command descriptions ........................ 26
6.3.1.2 Signal descriptions ............................... 27
6.4 Switching on...................................................... 27
6.5 Switching off ..................................................... 27
6.6 Starting mode.................................................... 27
6.6.1 Manual start up ....................................... 27
6.6.2 Automatic start up................................... 27
6.7 Settings ............................................................. 27
6.7.1 Setting current time................................. 27
6.7.2 Setting ON / OFF periods.......................... 28
6.7.3 Reading a restored program..................... 28
6.7.4 Modifying a programme .......................... 28
6.7.5 Deleting a stored programme .................. 28
6.7.6 Changing the Temperature and Humidity
values ...................................................... 28
6.7.7 Locking/unlocking remote control unit ..... 29
6.8 Operating Mode ................................................ 29
6.8.1 Cooling.................................................... 29
6.8.2 Ventilation ............................................... 29
6.9 Operating Faults ................................................ 30
6.10 Bus system....................................................... 30
SECTION 7 – MAINTENANCE................................. 30
7.1 End-of-Season Maintenance .............................. 30
7.2 Pre-Season Maintenance.................................... 30
7.3 Maintenance Safety Regulations ........................ 31
7.3.1 Clothing .................................................. 31
7.3.2 Unit warnings .......................................... 32
7.3.3 Residual risks ........................................... 32
7.3.4 Unit warnings .......................................... 32
7.4 Technical assistance requests.............................. 32
SECTION 8 – DISMANTLING.................................. 32
8.1 Disposal............................................................. 32

Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A Page 3
General Information
The contents of this document are for information
purposes only and are subject to modifications without
notice;
This manual must be kept in the project file until final
machine dismantling and if the machine is sold, it must
be passed to the new owner.
If a fault occurs causing machine stoppage, AmbiRad
Limited is not liable in any way for any damages caused
by the stoppage and in no way is the warranty period
extended.
User Information
This manual is to be considered an integral part of the
machine and must be filed in an accessible place for the
workers that use and maintain the machine.
The workers using and maintaining the machine must be
fully aware of its contents before the machine is placed in
service.
If the manual is misplaced or damaged, immediately
request a copy by contacting your supplier, indicating the
identification data of the plant shown on the machine
identification plate and on the cover of this manual.
The machine is conforming to the following European
Community Directives:
• 2006/42/EEC Machinery Directive
• 2006/95/EEC Low Voltage Directive
• 2004/108/EEC EMC Directive
UNDER NO CIRCUMSTANCES MAKE
MODIFICATIONS TO THE MACHINE AND
IT’S INTENDED USE.
The manufacturer declines all responsibility
for any damages which may be, directly or
indirectly, caused to exposed persons or
property, due to improper use or use of
the machine for different purposes other than the
design purposes, incorrect installation, inappropriate
power supply, different or changes to the installation
environment from the one declared during order
confirmation, grave deficiency of maintenance,
unauthorized alterations and modifications, use of non-
original spare parts, removal of the protection guards,
ignoring the instructions for use, negligence, etc.
1. Technical Information.
1.1 Machine identification data
Machine identification data is shown on the warranty
sheet supplied to the customer and is enclosed in the
documentation and on the machine identification plate.
1.2 Introduction
During the summer to improve the internal environment
within a production unit, warehouse or other area, it is
necessary to ventilate the area with frequent changes of
fresh, filtered and possibly cool air. For large areas such
as industrial buildings, an air conditioning plant is not
practicable due to the large volume of air to be cooled
and the thermal loads of processes to be neutralized,
requiring very high energy load, plus the cooling effect is
reduced by the exhaust air extraction plant and frequent
opening of doors during normal activity.
Evaporative cooling plants that cool the air using a natural
principle represent an optimal solution: air passes through
special wet water filters, losing part of its heat during the
evaporation process of the water and hence lowering
the air temperature. The absence of refrigeration plant
reduces energy consumption to a minimum and enables
large volumes of air to be treated.
1.3 Technical Data
Unit WA100 WA150
Maximum
m3/h
10,000 13,000
Air Capacity Average 7,500 9,700
Minimum 5,000 6,500
Cooling Capacity1kW 15 19
Electrical Supply V 230V 1phase 50Hz
Current A 3.7 4.8
Power Consumption kW 0.9 1.2
Water Consumption (average) l/h 34 39
Water Inlet dia in 3/8 3/8
Water Outlet dia mm 60 60
Air Duct Size mm 600 x 600
Maximum Duct Length m 5 + 1 bend
Humidification Panel:
Thickness mm 100 100
Surface Area m22 2
Saturation Efficiency % 88 88
Dimensions: L x W x H mm 1300 x 670 x 1300
Weight (empty/full) kg 60/75 63/78
Noise Data Min/Max speed
Outdoor2
dB(A) 49/65 50/66
Indoor 49/66 50/67
1 Test conditions: E. Temp. = 33°C-R. Hum 60%
2 Open field test, 4m distance
L
H
W

Page 4 Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A
Unit RC100 RA150 RA200 RC200
Maximum
m3/h
10,000 13,000 20,000 20,000
Air Capacity Average - 9,700 15,000 -
Minimum 5,000 6,500 10,000 10,000
Cooling Capacity1kW 15 19 30 36
Electrical Supply V 400V 3ph 50Hz 230V 1ph 50Hz 230V 1ph 50Hz 400V 3ph 50Hz
Current A 3.5 4.8 7.0 7.0
Power Consumption kW 1.6 1.2 1.8 3.2
Water Consumption (Ave) l/h 34 43 64 64
Water Inlet dia in 3/8 3/8 3/8 3/8
Water Outlet dia mm 60 60 60 60
Air Duct Size mm 600 x 600 600 x 600 1185 x 590 850 x 470
Static Pressure pa 80 n/a n/a 80
Maximum Duct Length m See below 5 + 1 Bend 5 + 1 Bend See below
Humidification Panel:
Thickness mm 100 100 100 100
Surface Area m22.7 2.7 3.4 3.4
Saturation Efficiency % 88 88 88 88
Dimensions: L x W x H mm 1150x1150x1050 1150x1150x1050 1610x1150x1050 1610x1150x1050
Weight (Empty/Full) kg 87/108 67/88 120/146 160/186
Noise Data
dB(A)
Min/Max Speed Min/Max Speed Min/Max Speed Min/Max Speed
Outdoor255/61 50/66 53/68 58/65
Indoor 56/62 50/67 53/70 60/66
1 Test conditions: E. Temp. = 33°C-R. Hum 60%
2 Open field test, 4m distance
RC100 Fan Curve
RC200 Fan Curve

Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A Page 5
1.4 Warnings
The ColdAIR evaporative cooler can be installed in
all areas where it is necessary to improve the internal
environment where the area must be ventilated with
frequent changes of fresh, filtered and possibly cool air,
such as:
• Factories, production areas
• Commercial premises
• Warehouses
The equipment must NOT be used for anything
other than its designed use for any reason
whatsoever, or used in a different way than
stated in this manual.
DO NOT install the machine in closed areas; the
machine must be installed outside the area to be
treated, except by specific approval of the
manufacturer.
Do NOT start-up the machine if it is not
connected to the relative plant ( duct ) of air
distribution.
When the plant is operating, do not touch the
fan – Mechanical danger. Under NO
circumstance should any work be undertaken on
moving parts.
1.5 Control Panels
Any Controllers supplied are manufactured according to
EN 60204/1 regulations
.
UNDER NO CIRCUMSTANCE MAKE
MODIFICATIONS TO THE CONTROL PANEL.
UNDER NO CIRCUMSTANCE USE WATER TO PUT
OUT FIRES
1.6 Improper Use
The unit cannot be used for purposes other than those
stated in paragraph 1.4 of this instruction manual.
UNDER NO CIRCUMSTANCE INSTALL COLD
AIR EVAPORATIVE COOLING PLANTS IN
POTENTIALLY EXPLOSIVE ENVIRONMENTS.
2. Dimensions.
2.1 RA150
Section C-C
A: Water Inlet
B: Water Outlet (drain)
C: Wiring Connections

Page 6 Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A
2.2 RA200
20
TA209
TA309
GB
A: Water Inlet
B: Water Outlet (drain)
C: Wiring Connections
2.3 RC100
Section A-A
A: Water Inlet
B: Water Outlet (drain)
C: Wiring Connections
Section A-A

Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A Page 7
2.4 RC200
Section A-A
A: Water Inlet
B: Water Outlet (drain)
C: Wiring Connections
2.5 WA100/150

Page 8 Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A
3. Packaging, handling and transportation
3.1 Delivery of the unit
When the unit is delivered, the customer MUST check the
condition of the goods
Check the packaging and its contents, if damage
due to transportation is found, record the
damage on the shipping documents to be signed
by the shipping agent and send a copy to your
supplier.
3.2 Handling and transportation
Take care when handling Evaporative Cooling
units. During off loading, handle and position
to avoid damage to the equipment. Avoid
contact with elements, which may damage the
equipment.
The manufacturer declines any responsibility for
damage caused during transportation, loading
and off loading of the evaporative cooling units.
3.3 Lifting
3.3.1 Lifting with a fork lift
3.3.2 Lifting with cables
We suggest to attach the cables as shown, inserting
spacers of an adequate length to prevent the cables from
damaging the casing when tightened. Because of the
heavy weight, RC models, when unpacked, are provided
with punched brackets to allow to lift them by using
appropriate metal tubes.
Place goods down with care. Avoiding dropping
and sudden movements.
UNDER NO CIRCUMSTANCE remain under
suspended loads and inside the movement area
of the lifting equipment.
Make sure that the capacity of the lifting
equipment is adequate for the weight of the
machine. Lifting must only be carried out by
qualified personnel.
3.4 Unpacking the equipment
Free all the components from the packaging material and
collect the packaging to avoid potential danger of fire and
suffocation of persons or animals.
Leave the equipment on its transportation packaging base
with any protection guards mounted, so that the lower
part is raised from the floor to avoid damage, until the
unit is installed.
Disposal of packaging materials must conform
to the regulations in force in the country of
destination where the evaporative cooling unit is
installed
3.5 Storage
During transportation and storage, make sure that the
environmental temperature is between 10 and 50°C.
If the ColdAIR evaporative cooling unit must be stored,
make sure that the relative humidity in the warehouse is
between 5% and 90%.
4. Installation
4.1 General Warnings about installing WA units.
Before proceeding to install, make sure that each
evaporative cooling unit has been unpacked and checked
for damage.
Positioning and installation of the evaporative cooling
units must be carried out by qualified personnel and by
observing the laws in force in the country of destination.
4.2 Positioning and Installation of WA Series
evaporative cooling units.
4.2.1 Wall installation
Fix the support bracket to the wall after the hole for the
air duct has been made. Refer to dimensional sketch on
next page.
On the rear side of the cooling unit (fan side), prepare the
first section of air duct (box section 600 x 600mm).
Position the cooling unit onto the support bracket,
Widen the forks as
much as possible to
balance the load.
Dip the ends of
the forks to avoid
damaging the bottom
of the machine.

Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A Page 9
pushing the cooling unit towards the wall until it makes
contact with the rear mountings of the bracket
Fix the cooling unit using the appropriate side brackets
and the self tapping screws provided.
4.2.2 Window installation
Fix the window bridge to the window after the hole for
the air duct has been made. Refer to dimensional sketch
below
Fix the supplied support bracket at the prepared frame.
On the rear side of the cooling unit (fan side), prepare the
first section of air duct (box section 600 x 600mm)
Position the cooling unit onto the support bracket,
pushing the cooling unit towards the wall until it makes
contact with the rear mountings of the bracket
Fix the cooling unit using the appropriate side brackets
and the self tapping screws provided.
Wall Installation Window Installation
Wall Installation support bracket supplied
with unit
Window Installation support bracket NOT
supplied with unit. This will need to be
made by the installer.

Page 10 Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A
4.3 General Warnings about installing RA/RC units
Before proceeding to install, make sure that each
evaporative cooling unit has been unpacked and checked
for damage.
Positioning and installation of the evaporative cooling
units must be carried out by qualified personnel and by
observing the laws in force in the country of destination.
4.4 Positioning and Installation of RA/RC series
evaporative cooling units.
4.4.1 Roof mounted RA Evaporative coolers.
Prepare and secure the air inlet duct onto the roof
structure. (The unit is equipped with a mating duct flange
for direct attachment).
Duct dimensions:
RA 150 = 600 X 600mm
RA 200 = 600 X 1150mm
Position the base of the cooling unit onto the duct flange
using fixings provided.
It is recommended to apply silicone sealant between the
two flanges to guarantee a perfect water tight seal.
Check that the clamp holding the flexible hose to the
pump is tight.
Position and secure the four posts to each corner of the
cooling unit base using the screws provided.
Position and secure the humidification panels by sliding
them between the guides of each side post.
Ensure the groove, on one side of the panel, is
uppermost.

Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A Page 11
Insert the water distribution strips into the grooves on
each panel.
Ensure all strips are seated correctly in their grooves.
Insert the water distributor into the grooves of the
humidification panels ensuring the supports of the water
distributor are in a uniform manner on the strips.
Noting the position of the water pump in the unit, make a
hole through the panel for the hose end fitting.
Secure the fitting with a hose clamp and complete the
water connections to the pump.
Insert the grilles onto the sides of the panels using clips
provided
Note: DO NOT ASSEMBLE THE GRILLE AT THE FRONT OF
THE MACHINE (CONNECTIONS / COMPONENTS SIDE).
The grille can be inserted later without clips to aid
maintenance.
Insert the clips downwards to their first positive stop.
Once all the clips are in position, push fully home until
they are level with the top of the panels.

Page 12 Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A
Once all four protection grilles have been secured, locate
and fix the top of the unit using the screws provided.
4.4.2 Roof mounted RC Evaporative coolers
Prepare and fix an air inlet flanged duct and a frame
to hold up the unit. The flange has to be of the same
dimension of the unit’s trunk duct flange.
The unit is equipped with a section of flanged duct
that will be fixed to the flange of the inlet duct already
prepared and with two side bars that will be fixed to the
prepared frame.
Verify that the frame is designed to support the weight
of the machine, doesn’t cause vibrations and is perfectly
horizontal. It may be necessary to insert anti-vibration
dampers between frame and the bars, this needs to be
planned before manufacturing the frame and consider
fitting flexible couplings in the water connections.
Position the evaporative cooler on the inlet duct.
Fix the two flanges (base duct flange-inlet duct flange)
together and the bars at the frame by using provided
bolts.
We would suggest to insert an outlet flexible connection
between the two flanges to avoid vibrations transmitted
through the ducts.
4.4.4 Wall/Window mounted RA evaporative coolers
Prepare and fix an air inlet flanged duct and a frame to
hold up the unit.
The flange has to be of the same dimension of the unit’s
trunk duct flange.
The unit is equipped with a trunk of flanged duct that will
be fixed to the flange of the inlet duct already prepared
and with two side bars that will be fixed on the frame.
Verify that the frame is designed to support the weight
of the machine, doesn’t cause vibrations and is perfectly
horizontal.
Position the evaporative cooler to the inlet duct.
Fix the two flanges (base duct flange-inlet duct flange)
together by using bolts provided.
We recommend applying
silicone sealant between
flanges to guarantee
perfect insulation from
external agents.

Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A Page 13
4.5 Installation
Inside the building, prepare the first fixings points for the
support chains of the air inlet duct. These must be placed
in a position to avoid excessive force on the air inlet duct
and make sure they are on the same axis as the machine.
To support the unit from the ceiling or the wall, use chains
and accessories having the necessary test certificates,
made from zinc-plated steel or stainless steel and having
a wire diameter of no less than 3 mm or dimensioned for
the weight to be supported, bear in mind safety margins
imposed by regulations.
DO NOT USE ALUMINIUM ALLOY OR SIMILAR
COMPONENTS
Once the plant has been installed, rotate the
diffuser blades towards the exterior and adjust
the blades to an optimal position to direct the
airflow.
4.6 Connection to the power supply
Connection to the power supply must be carried
out by qualified personnel.
All components used to connect the power
supply must be certified. Before working on the
power supply cables, make sure that power is
cut-off.
Provide an efficient earth connection.
The power supply is: 230 V ~ 50 Hz
Each cooling unit must be connected to the power supply
using a two pole switch. The isolator must have a distance
between its contacts of at least 3 mm for each pole and
must be placed in a position that can be easily reached.
The electrical installation must be in accordance to the
current I.E.E. Regulations.
The cooling unit is supplied with:
• An Electrical board and Main power inlet switch for
connection, near to the unit.
• A Control panel with display for remote command of
the equipment, positioned inside the building.
A multi-core cable made of 2* or 4** core + earth, for
connection to the power supply: Make the necessary
cable extensions using cables of adequate sections
depending on the distance to be covered. (*WA/RA units
**RC units)
A multi-core cable with 5 cores, for connection of the
remote control panel to the cooling unit. Make the
connection using shielded cable type 20 AWG - 5 core
with a minimum section of 0.5mm² - Maximum length of
25 meters.
It is essential to maintain the polarity of the
electrical phases and the numbers on the wires/
terminals.
Connections are made as shown on the wiring diagram
below.
4.7 Wiring Diagrams
4.7.1 Control Panel with Temperature Probe
• Connect the cooling unit to the power supply using
the 2*/4** pole isolator switch. (*WA/RA units **RC
units)
• Connect the Remote Control Panel to the Cooling
Unit using a 5 core screened cable as shown in the
diagram below, connect the ’screen’ of the cable to
the earth.
Control Panel
Cooler terminal connections
Blue Brown Brown Brown
Yel/Grn Brown White Green Yellow Grey
m
s
Grey
Yellow
Green
White
Brown
Screened
cable 5 x
0.5mm2
L 3
L 2
L 1
Power supply :
WA/RA 230v~50Hz
RC 400V~50Hz
Brown
Brown
Brown
Blue
Yellow/Green
Note: Grey cable used for
optional BMS control

Page 14 Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A
4.7.2 Schematic wiring for WA100 & RA150
4.7.3 Schematic wiring for RA200
Legend
A1 Main Switch
A2 PCB
A3 Control Panel
M1 Fan
M4 Pump
S1 Drain
S2 Float switch
Y1 Inlet Valve
Legend
A1 Main Switch
A2 PCB
A3 Control Panel
M1 Fan 1
M2 Fan 2
M4 Pump
S1 Drain
S2 Float switch
Y1 Inlet Valve

Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A Page 15
4.7.4 Schematic wiring for RC100
Legend
A1 Main Switch
A2 PCB
A3 Control Panel
KM1 1st Speed contactor
KM2 2nd Speed contactor
M1 Fan 1
M4 Pump
S1 Drain
S2 Float switch
Y1 Inlet Valve

Page 16 Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A
4.7.5 Schematic wiring for RC200
Legend
A1 Main Switch
A2 PCB
A3 Control Panel
KM1 1st Speed contactor
KM2 2nd Speed contactor
M1 Fan 1
M2 Fan 2
M4 Pump
S1 Drain
S2 Float switch
Y1 Inlet Valve

Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A Page 17
4.7.6 Multiple coolers
Multiple ColdAIR evaporative coolers can be connected
into one system via a single control panel and one or
more router modules.
When designing the system, the siting of the evaporative
coolers and control panel must be carefully considered,
as the sensor is built into the controller. Max distance
between router and the coolers is 200m.
The system comprises of:
• 1 Control panel display unit.
• 1 ColdAIR evaporative cooler acting as a master.
• Up to a max of 3 routers each having a max of 4
ColdAIR evaporative coolers as slaves.
System examples shown below.
2 Routers
(max 9 coolers)
1 Router
(max 5 coolers)
3 Routers
(max 13 coolers)

Page 18 Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A
4.7.7 Multiple coolers via single router
Diagram for use with Display Module model ref SCP015V110 only.
Please consult supplier for display module ref SCRE10A/SCRE50D
NOTES DISPLAY MODULE: Connect terminals L1, L2, V+ and V- to router input terminals L1, L2, V+ and V- using 4 x 0.5mm² screened cable. Maximum cable run between display module and router is 200m. MASTER COOLER: Connect terminals L1 and L2 to the router input terminals L1 and L2. Do not use V+ and V-. Maximum cable run between router and cooler is 200m. SLAVE COOLER(S): Connect terminals L1 and L2 to the router outlet terminals L1 and L2. Add a jumper cable between terminals M/S and V-. Maximum cable run between router and cooler(s) is 200m. All coolers and routers must be connected to 230V mains supply. *Interconnecting between Display Module and Router must be used using screened cable.

Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A Page 19
4.7.8 Multiple coolers via two Routers
Diagram for use with Display Module model ref SCP015V110 only.
Please consult supplier for display module ref SCRE10A/SCRE50D
NOTES DISPLAY MODULE: Connect terminals L1, L2, V+ and V- to router input terminals L1, L2, V+ and V- using 4 x 0.5mm² screened cable. Maximum cable run between display module and router is 200m. MASTER COOLER: Connect terminals L1 and L2 to the router input terminals L1 and L2. Do not use V+ and V-. Maximum cable run between router and cooler is 200m. SLAVE COOLER(S): Connect terminals L1 and L2 to the router outlet terminals L1 and L2. Add a jumper cable between terminals M/S and V-. Maximum cable run between router and cooler(s) is 200m. All coolers and routers must be connected to 230V mains supply. *Interconnecting between Display Module and Router must be used using screened cable.

Page 20 Reznor, Coldair, Installation manual, EN 2020-03, 703500 Iss A
4.8 Connection to the water supply
The ColdAIR cooling unit is connected to the water
supply by a 3/8” connection located on the bottom of the
unit. The customer must provide a shut off valve to the
machine inlet supply.
The water supply must guarantee a minimum capacity of
5 -10 Lt/minute at a pressure of 1.5 - 3 bars. (maximum
pressure allowed: 6 bars ).
It is advisable to install the water distribution inside the
building, to protect it against freezing during winter and
also make sure it can be emptied if necessary; on the
contrary, insulate it adequately. Remove the protection
material from the 3/8” connection before proceeding to
connect it to the main water supply.
The unit is also equipped with a Ø63mm connection
to discharge water, remove the protection material and
connect a flexible hose, fix the hose using a hose clamp.
Connect the hose to the discharge system according to
the regulations in force regarding hygiene in the country
where the unit is installed.
ATTENTION: DO NOT use excessive force when
connecting either the water supply and discharge
hose to their respective connections.
5. Health and safety
5.1 Protection devices
The safety systems on the unit comply with the
regulations in force as required by the relevant EU
Directive.
Maintenance personnel must wear suitable clothing and
PPE
5.2 Clothing
The equipment is installed in locations which cannot be
directly reached by users during normal operations and
therefore particular attention regarding clothing is not
necessary.
5.3 Residual risks
Pay attention to fan movement. Do not put arms
or limbs in equipment. – Mechanical danger
Under NO circumstances use water to clean
electro-mechanical components – Electrocution
danger
5.4 Emergency situations
In case of emergency:
Immediately stop the equipment and isolate
the electrical circuit using the 2 pole isolator,
identify and eliminate the problem by checking
the causes of its origin.
UNDER NO CIRCUMSTANCES USE WATER TO
PUT OUT FIRES, ONLY USE POWDER OR CO2
EXTINGUISHERS
6. User and operating instructions
6.1 General
The operation of the evaporative cooler is based on an
important principle. It introduces large quantities of
fresh air into the building and removes hot unpleasant
air through the doors, windows and other openings.
If the system is not able to expel the volume of air
being introduced, the efficiency of the system will be
compromised.
INLET FRESH AIR = OUTLET HOT AIR. A very simple
principle.
If the system is able to expel all the air introduced, the
system will operate at it’s maximum efficiency level.
The ideal condition is to position the air diffusers away
from the openings (windows, doors, etc.) in the building.
By opening a window far away from the diffusers, the
air will pass through the building and cool it down.
Maximum efficiency can be reached by adjusting the
dimensions of the window and door openings Never
close the openings: if they are closed, no changes of air
will occur, consequently reducing the cooling effect and
increasing the relative humidity level inside the building.
To optimize efficiency, take into account the following
openings for air expulsion: Guarantee about 1m² area of