Coolerado M30 User manual

Coolerado Installation Manual
M30, M50B, C60A
Version 2014-1
Date: 08-18-2014
WWW.COOLERADO.COM
COOLERADO CORPORATION 4430 GLENCOE STREET, DENVER, COLORADO 80216
INSTALLATION AND SERVICE PROVIDER
COMPANY______________________________________
ADDRESS_______________________________________
_______________________________________________
_______________________________________________
_______________________________________________
TELEPHONE_____________________________________
__

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Initial Installation Start-up Data Sheet
Customer Information
Installer Information
Name
Company
Address Line 1
Address Line 1
Address Line 2
Address Line 2
City
City
State / Prov.
State / Prov.
Postal Code
Postal Code
Phone #
Phone #
Installation Date:
Installation Information
Air Filters installed (Y/N)
Water Filter Installed (Y/N)
Water Hardness
Type of Air Filter Installed
Type of Water Filter Install
Size of Air Filter Installed
Make of Water Filter
Water Pressure @ unit
Plenum Air Pressure Measurements
Conditioned Air
Exhaust Air
Outside Air Temp
Outside Humidity Level
Conditioned Air Temp
Power
Line Voltage
Line Amperage
Phase
Control Voltage
MUST BE COMPLETED AFTER INITIAL INSTALLATION
Equipment Information
Unit Model #
Unit Serial #
Thermostat Make
Thermostat Model #

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Table of Contents
Installation Notes 4
Safety Considerations 5
Installation Recommendations 5
Installation Steps
Step 1 –Check Equipment and Job Site 6
Step 2 –Inspect Filters and Heat Exchangers 7
Step 3 –Clearance Requirements 8
Step 4 –Install on Solid and Level Foundation 9
Step 5 –Drain Connections 10
Step 6 –Outdoor Intake Air 11
Step 7 –Conditioned Air Ducts 10
Step 8 –Working Air Ducts 12
Step 9 –Water Supply Connections 14
Step 10 –Electrical Power Connection 17
Step 11 –Thermostat Wiring 18
Step 12 –Control Board Set-up and Operation 19
Step 13 –Thermostat 19
Step 14 –HMX Wet Out Logic 20
Step 15 - Operational Startup 21
Step 16 –Final Checks 22
Post Installation / Seasonal Start-up 22
Normal Operating Procedure 22
Seasonal Shutdown 23
Care and Maintenance 23
Appendix
Appendix 1 –Coolerado Water Quality Requirements 25
Appendix 2 - Wiring and Control Diagram 26
Appendix 3 –Coolerado Thermostat Wiring Picture 27
Appendix 4 –Multiple Unit Control Diagram 28
Appendix 5 –Water Control Board / Indicators / Dip Switch Settings 29
Appendix 6 –Thermostat Operations for (TEC2145-4) 30
Appendix 7 –Thermostat Programming (TEC2145-4) 31
Appendix 8 –Freeze Protection 32
Appendix 9 –M30 Dimensional Specifications 34
Appendix 10 –M30 Air Flow Performance Table 35
Appendix 11 –M50A Dimensional Specifications 36
Appendix 12 –M50A Air Flow Performance Table 37
Appendix 13 –M50A Curb Mount Unit 38
Appendix 14 –C60 Air Dimensional Specifications 39
Appendix 15 –C60 Flow Performance Table 41
Appendix 16 –Water Pressure Charts 42
Appendix 17 –Limited Warranty 44
Appendix 18 –Installation Check List 46
Appendix 19 –Preventative Maintenance, (PM) Checklist 51
Appendix 20 –Troubleshooting 52

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Installation Notes

Coolerado Installation
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SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock, or other conditions, which may cause death, personal
injury, or property damage.
Use this product only in a manner intended by
manufacturer.
Ensure the fan has completely stopped prior to
changing filters.
Before servicing or cleaning, other than changing
filters, ensure power to the unit is disconnected and
locked out.
Keep body, hands, and foreign objects away from air
intake while unit is in operation.
To avoid fire hazard, do not block any air intake.
Do not use the unit cabinet as a platform or storage.
Do not attempt to sit, stand, or climb on the unit.
Do not use the unit’s fan with any solid state speed
control device.
Consult a qualified installer, service agency, or your product
distributor for more information, or assistance. The qualified
installer or agency must use only factory-authorized kits or
accessories when modifying this product. Refer to the
individual instructions packaged with the kits or accessories
when installing.
WARNING: Follow all safety codes. Wear safety glasses,
protective clothing, and work gloves.
Read these instructions thoroughly and follow all warnings
or cautions included in literature and attached to the unit.
These instructions are intended as a general guide and do
not supersede local codes in any way. Authorities having
jurisdiction should be consulted before installation.
Recognize safety information, symbols and words:
(DANGER) will identify serious hazards, which will result in
severe personal injury or death.
(CAUTION) will identify unsafe practices, which would result
in minor personal injury or poor unit performance, product
damage and property damage.
(NOTE) will be used to highlight suggestions, which will
result in enhanced installation, reliability, or operation.
INSTALLATION RECOMMENDATIONS
NOTE: Any restrictions to air movement, either for intake
air, conditioned air, or exhaust air, will reduce the capacity
and efficiency of the unit.
NOTE: Working air (exhaust) will always be heavier than
ambient air until it fully mixes and comes to equilibrium
with outside air.
NOTE: Do not drill, cut, or compromise the powder coat
finish within the wet section of the unit. See Figure 19
The unit may be installed either indoors or outdoors.
Indoor installations require inlet air duct and
working air, (humid air exhaust), duct which may
increase costs and often add to static duct pressure
loss, create tight working spaces and require flexible
connections to allow future maintenance.
Flexible duct connectors should be installed between
any rigid ductwork and the unit to allow for leveling
requirement and to mitigate vibration. If the unit is
mounted indoors, a 2 ft. service area in front of the
Coolerado inlet fan plenum for servicing must be
designed for. The inlet air duct attached to this
plenum will need to be easily removable for
maintenance access.
Leave room for maintenance such as filter changing
on the C60 requires 25” on at least one side. If the
units are hung from the ceiling it can be difficult to
change filters.
If unit is installed indoors, install an emergency drain
pan that extends beyond the unit by at least 6” (152
mm) on all sides along with separate overflow drain
in accordance with local plumbing codes.
Be sure to provide adequate support for the unit and
associated ductwork.
Be sure that there is no exposure to flammable
vapors, excessive dust, or other contaminants in the
air.
To obtain the greatest cooling capacity, air will need
to flow into and out of the unit as freely as possible.
Humid working air must be allowed to flow freely
away from the unit and directed away from the

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unit’s intake air supply. If ducted, ensure adequate
condensate drains are available.
The intake air opening must be kept free from
obstruction and allowed to draw in fresh dry air.
The conditioned air must be unobstructed to the
building or space to be cooled.
All ductwork must be properly sealed and insulated.
Keep all ductwork runs as short as possible between
the unit and conditioned space.
If exhaust ducts are needed they must be sealed.
If unit is installed outdoors, install rain shields as
needed.
In unheated environments, provide adequate freeze
protection for system water supply and drain.
Ensure level mounting to allow the internal water
distribution to work correctly.
If the potable water supply is considered moderately
hard, hard or very hard include a sodium-based
water softener, see Appendix 1.
NOTE: Make any necessary duct modifications to implement
seasonal Duct Blocks during initial installation.
It is recommended that off-season duct blocking devices be
installed as part of the end-of-season shutdown procedures.
Step 1—Check Equipment and Job Site
CAUTION: Take the necessary precautions and use
appropriate equipment to move and install.
INSPECT PACKAGING OF EQUIPMENT BEFORE ACCEPTANCE
Check the unit for any signs of shipping damage before
accepting equipment from the freight carrier. If shipment is
damaged do not accept shipment or it may become yours as
is. If damaged, file an immediate claim with the shipping
company. No return shipment will be accepted without
written return authorization.
UNPACK UNIT
Move to final location. Remove carton or packaging, taking
care not to damage unit.
INSPECT EQUIPMENT
Check the unit for any signs of shipping damage. Fan should
spin freely and all covers and parts should be secured
properly. To reduce the shipping footprint on a C60, the
conditioned air plenum may be shipped wrapped to the inlet
of the unit rather than bolted on. If shipment is damaged or
incomplete, file a claim with the shipment company as soon
as possible. No return shipment will be accepted without
return authorization.
NOTE: The unit is shipped with air filters for initial use.
CHECK BUILDING UTILITIES AND GEOMETRY
Check for plumbing vent location
Check for exhaust vents and fumes from heaters
Check water location and hookup
Check for location of sanitary sewer drain
Check for storm sewer
Do downspouts connect to the storm sewer drain?
Check power
Check control connections
Check water hardness
LOCATION OF EQUIPMENT
Select a location for the unit as close as possible to the supply
air diffuser and away from any building exhaust or sources of
high humidity levels.
NOTE: If tying into existing HVAC equipment check for
complete functionality before starting any work.
NOTE: Prevailing winds and building geometry must be
taken into consideration in determining air inlet and
exhaust locations. Additional ductwork for either the intake
or exhaust may be required to assure proper separation of
the air streams.
Prevailing wind consideration, Figure 1
NOTE: Inlet hoods should not be located near driveways,
parking lots, gas meters, oil fill pipes, dryer vents or other

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areas. Avoid areas where objectionable vapors,
contaminants, or excess particles could be drawn into the
unit. Humid working air must be directed into a free air
outdoor space and away from any condensing surface.
NOTE: Humidity sources include the Working Air exhausts
from the unit itself or from adjacent units, cooling towers,
open drains, grass, bushes, trees, swampy areas, swimming
pools, water features, plumbing vents, etc.
DANGER: Do not expose the unit intake air to flammable
liquids or vapors and away from excessive dust sources.
LIFTING EQUIPMENT
Forklift / crane
Crane
Straps and spreader bar
Upper security banding (as seen below)
The lifting point above the unit must be at least 4’ (1.2 m) or a
spreader bar is needed to prevent squeezing the box.
Care should be taken not to rack or torque the units when
moving or lifting units into position as this may cause poor
door fitting, Heat and Mass Exchanger racking and leaking, air
leaks, etc.
M50B Lifting Lugs, Figure 2
Lifting Straps/Banding, Figure 3
Step 2—Inspect Filters and Heat Exchangers
1.) Inspect the unit’s filters for damage or debris.
2.) Spin the fan for freedom of movement.
3.) Remove filters and inspect heat and mass
exchangers (ensure flow arrow on filter is correct).
4.) Inspect surfactant soap container for proper level.
Model
Pleated Filter Size
M30
2- 2”x20”x25” pleated (50x500x625mm), nominal
1.75”x19.5”x24. 5” (44.5x495x622mm), actual
M50B
3- 2”x20”x25” pleated (50x500x625 mm),
nominal
1.75”x19.5”x24. 5” (44.5x495x622mm), actual
C60A
4- 2”x16”x25” pleated (50x500x625 mm),
nominal
1.75”x15.5”x24. 5” (44.5x495x622mm), actual

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Filter Flow Arrow, Figure 4
NOTE: One 1” (25 mm) thick filter can be used in place of 2”
(50 mm) filters but will need to be changed twice as often.
CAUTION: Do not substitute the recommended 2” (50 mm)
filter with two 1” (25 mm) filters, this will significantly
reduce the airflow through the unit. See Figure 5
DANGER: Do not expose the intake air to flammable liquids
or vapors.
Filter image, Figure 5
Step 3—Clearance Requirements
1.) Inspect clearances and position the unit for
installation –see Appendices 8, 10 or 12 for unit
dimensions and clearance details per model.
2.) Familiarize yourself with the unit’s connection and
service points. See Figure 6.
Pre-Cut 16" (406 mm)
Diameter Exhaust In Top
High Voltage Power
Factory Wired
Connections
Soap
Pump
Control Wiring,
Low Voltage
Do Not Block
Filter Access Door
Filter Access
Door Handles
Pre-Cut 16" x 16"
(406 x 406 mm)
Louver/ Cover
Lifting Lugs
Drain
Water In
Low Voltage Wire
Terminals In
High Voltage Wire
Terminals In
Outdoor
Air In
Identifying System Components, M50A, Figure 6
NOTE: Ensure unit is positioned so that filters, soap pump
and electrical service areas are easily accessible for
maintenance and seasonal changes.
NOTE: Figure 7 shows the working exhaust air from the top.
For units using side working air exhaust.
CAUTION: Ensure a minimum of 24” (610 mm) clearance for
side mounted working air exhaust.
NOTE: Take precautions not to block service areas of unit
and that ductwork connections have enough flexibility for
leveling or seasonal re-leveling purposes.

Coolerado Installation
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Clearances:
Sides: 0" if exhausted from the top.
24"(600 mm) if exhausted from both
sides. A baffle maybe needed between
M50's to reduce mixing with intake air.
Outside Air Intake, fan side: 24" (600
mm).
Conditioned Air Plenum side: 12" (300
mm).
Top: 6" (150 mm) for installation if not
exhausting out the top.
Do Not Cut
Below 6" (150
mm) From Base
of Unit
Clearance Requirements, Figure 7
Step 4—Install on a Solid and Level Foundation
Mount the unit on a solid and level foundation with
proper sub-base and drainage to ensure the unit will
not shift during its lifetime.
Take the proper precautions when mounting the
unit to reduce noise and vibration.
If mounted on rafters, use appropriately sized
vibration damping springs and duct isolation
attachments.
If installed on a roof, an attic, or any place where
structural support may be an issue, consult with a
structural engineer and comply with local code
requirements.
The base of the C60 and M30 units can be attached to for tie
down purposes with screws that are less than 1” (25 mm) in
length and located within 1” (25 mm) of the bottom of the
base, see Appendices 8, 10 and 12.
The M50A comes with lifting lugs located in the bottom four
(4) corners with ¼” (6.35 mm) x 20 mounting bolts that can
also be used for installation attachment to a frame.
M50A Leveling Feet, Figure 8
If unit is installed indoors, install an emergency drain pan that
extends beyond the unit by at least 6” (150 mm) on all sides
along with separate overflow drain directed to a sink or
outside location where the leak can be seen and in
accordance with local plumbing codes, see Figure 9.
Overflow/Drain Example, Figure 9
LEVEL UNIT
The weight of the wet unit will require a stable base. During
installation, the unit must be properly supported and leveled
to stay stable over time. The water delivery to all areas inside
the unit depends on the unit being level within 1/16” per foot
(5.2 mm/meter) in both directions. CAUTION: Failure to do
so will void system warranty.
The M50A comes with leveling screws in a box wrapped with
the unit.
CAUTION: Foundation racks or solid drainage
footing/concrete pads must be used on ground installations
to ensure the unit remains level and secure. Proper
preparation of ground is necessary to maintain level footing
over time.
CAUTION: Do not place unit directly underneath roof, eaves
or drip lines without adequate gutters.

Coolerado Installation
Page 10 of 53
Step 5 –Drain Connections
NOTE: The units drain connection is located underneath the
unit’s intake air plenum.
Install system drain piping
A drain line must be connected to the:
oM30 or C60 - 1½” (38.1 mm) ABS female slip
connection
oM50A - can be 1 ½” (38.1 mm) pipe over
outside; 1 ¼” (31.75 mm) inside or 40mm
deeper inside
If local or state codes allow drain water to be used for
Irrigation it must be drained away from the pad to eliminate
any settling that will prevent the unit from remaining level. If
this occurs, the drain line must slope a minimum of 1/8” per
foot (10.4 mm/meter).
Pooling of water near the unit will also allow excess humidity
to be drawn into the unit, which will reduce the cooling
performance of the unit.
CAUTION: Do not discharge to roof top drains that drain to
parking lots or alleys. (The continual flow of water will cause
a slick green algae growth).
Drain Connection, Figure 10
If the unit drain line is connected to an internal building
sanitary sewer drain line, it must feed into a 1-1/4” (40mm),
(or larger) plumbing drain line that meets all plumbing code
requirements. The drain line must be vented as it enters the
building sanitary sewer drain line.
Step 6—Outdoor Intake Air
NOTE: The intake air duct must not be located near the units
working air duct.
Install and inspect ductwork if needed.
The intake air can enter the unit directly or through a
properly sized duct. Use intake sizes from Table 1:
Model
Intake Duct Size
Intake Duct Size
M30
16 inches, (20” at fan inlet)
400 mm, (508 mm
at fan inlet)
M50
20 inches
500 mm
C60
22 inches, (20” at fan inlet)
560 mm, (508 mm
at fan inlet)
Intake Duct Sizes, Table 1
NOTE: If the unit is installed in a building (attic or other) a
duct may be needed to draw fresh intake air into the unit
from outside the building.
NOTE: The free open area of the intake grill must equal the
duct area. Failure to do so may cause excessive pressure
drop across the grill, see duct sizes in Table 1.
NOTE: If rigid duct is used to connect to the unit’s intake air,
it must be designed to be easily removed to allow service
access.
NOTE: In some roof top installations, parapet walls can trap
the heavy cool humid working air below the walls causing
the intake air to have a high humidity resulting in higher
conditioned air temperatures. In these situations the intake
air may need to be brought from a higher location, see
Figure 11.
High Parapet Walls, Figure 11

Coolerado Installation
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Intake Snorkel, Figure 12
Step 7 –Conditioned Air Duct
1.) Install properly sized, sealed and insulated
conditioned, R6 minimum, air duct to unit.
2.) For all units the conditioned air plenum is shipped
without pre-cut duct openings. This allows the
installer to add the ducts where desired on location.
Duct openings should only be cut into the front of
the supply plenum. DO NOT CUT OPENING IN THE
BOTTOM OF SUPPLY PLENUM or within 2” (20mm)
of the bottom. Coat and seal any exposed metal, see
Appendices 8, 10 and 12.
NOTE: Seasonal shut off dampers or easily accessible duct
blocks should be installed for easy winterization
changeover.
NOTE: A flexible duct connector should be installed between
the unit and any rigid ductwork to allow for seasonal
leveling and to mitigate vibration.
Recommendations for reducing temperature loss and
creating displacement ventilation conditions:
The air pressure at the units conditioned air plenum
should be 0.01 to 0.15 inches of water column (2.5
Pa to 37 Pa) greater than the working air exhaust
plenum under full air-flow. This will prevent water
migration from the exhaust side to the conditioned
air-side and provide adequate working air.
Seal duct work.
If the conditioned air ducts are located external to
the building or in an attic space, a minimum of R6
insulation is required. Follow local building and
insulation code requirements.
Size ducts to about 0.08 inches of water column per
100 feet (66 Pa per 100 m) of duct.
Maximize the trunk duct and minimize the length of
duct branches, see Figure 13.
Too many air-drops can cause excessive temperature
losses.
Large, non-mixing type diffusers (positioned low) are
recommended.
High ceiling installations should direct the air down
at low velocities, less than 200 ft/min (60 m/min),
preferably 50 ft/min (15 m/min). Do not mix air, see
Figure 18.
Ductwork Example, Figure 13
Duct Insulation, Figure 14
NOTE: Additional duct insulation may be required in high
heat gain areas such as attics, see Figure 14.
CAUTION: To get proper air movement it is sometimes
necessary to install several barometric dampers and/or
building exhaust fans.

Coolerado Installation
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NOTE: Adjust barometric dampers to optimize air
distribution.
Diffuser location examples:
Installation of a room diffuser might have the
conditioned air delivered at the opposite side of the
room from the door and sweep toward the door to a
barometric duct in the ceiling, see Figure 17.
A room with a window may have the diffuser
installed on the opposite side from the window, with
cooled air sweeping the room toward the window
and removing the hot air above the window, see
Figure 18.
NOTE: Avoid sharp bends and sudden reductions in ducting
causing pressure drops which impede air-flow.
Conditioned Air Plenum Duct Connection Figure, 15
M30 and C60 Conditioned Air Plenum inside Box, Figure 16
NOTE: Set the conditioned air plenum inside the box or the
HMX frame so that water will be directed into the box
rather than to the outside. Seal outside edge at bottom of
plenum, see Figure 16.
NOTE: The conditioned air plenum is not insulated in the
factory. Insulate plenum after duct holes have been cut out.
In outside installations, the plenum should be fully insulated
and sealed to reduce air temperature increases within the
plenum. Any increase in the conditioned supply air
temperature will result in an increased building temperature
and run time.
NOTE: Barometric Dampers and /or building exhaust fans
are installed to relieve conditioned space pressure at the
highest temperature locations.
Barometric Damper Example, Figure 17
Installation Example, Figure 18
Step 8 –Working Air Ducts, (unit exhaust)
If installed outside in an area with good ventilation,
install side louvers.

Coolerado Installation
Page 13 of 53
NOTE: Do not drill, cut, or compromise the powder coat
finish in the wet section or behind the HMX’s or drive
screws into filter areas or where internal wiring, soap
bottles, etc has been installed. See Figure 19
Wet Area, Figure 19
If units are located inside or multiple units are
mounted side by side requiring a common working
air duct:
oSeal ducts to prevent condensation from
leaking from the ducts
oProvision must be made for the duct to
drain condensation back to the unit.
Connect to an appropriate drain if ducting is
lower than unit. Duct joints should be
constructed to drain water such that it will
not catch in seams.
oDucts may be cut in the top or on either
side of any of the units, see Appendices 8,
10 and 12.
Top Mounted Exhaust Example, Figure 20
NOTE: If side louvers cannot be used, it is suggested to
extend the exhaust duct so that it is approximately 12 in
(30.5 cm) above the rooftop. This will help to prevent
working air from entering the system and decreasing
performance, especially on C60 models.
CAUTION: All duct connections to the unit must be able to
drain back into the unit. Ensure duct flanges mount to the
inside of the cabinet to prevent leakage of condensate. See
Figure 20 for an example.
CAUTION: Failure to prevent sunlight from reaching the heat
exchanger will allow degradation of the heat exchanger
material and possibly allow green algae growth if there is
enough dissolved nutrients in the water supply and or air.
The Clean HMX material will not support mold or algae
growth.
CAUTION: A bird screen must be installed over the outlet
exhaust to keep birds and squirrels out.
CONSIDERATIONS: The working air is always cooler than the
outside air. This air can be used to cool the back of solar
panels or directed to condenser coils (Most applications that
will not be affected by moisture).
CAUTION: Working air being drawn into the intake air will
seriously impact the temperature performance of the unit
and add significant humidity to the inside of the building.
When installing the unit on the roof or ground, use working
air louvers with protective screening (these louvers are sold
separately). Using louvers other than those supplied by
Coolerado may void the warranty.
NOTE: At least 24 inches (600 mm) should be left between
side louvers and any object to allow free air-flow.
Additionally, this will allow access for the louver panel
(which houses a filter pad that prevents water from spitting
from louver).
NOTE: Side louvers may have some condensation and excess
water carry over from the working air (which may contain
minerals) and should be located where mineral buildup
outside the unit will not be a problem.

Coolerado Installation
Page 14 of 53
Exhaust Louvers, Figure 21
M50A and C60 units are shipped with precut holes for
louvers. The M30 units require that holes be cut to accept the
louvers. Side louvers should be cut low in the box so the
heavy working air falls away from the intake air.
To install these louvers in an M30, cut a 16 “ x 16 “ (406 mm x
406 mm) hole on one or both sides of the unit.
NOTE: One side is sufficient to allow for working air exhaust
on an M30 model, but two (2) are required for the M50A’s
and C60’s.
CAUTION: The working air expels excess water, minerals and
salts at all times it is in operation. Any holes cut into this
section or screws attached must be coated on the inside
with a high quality duct sealer to prevent corrosion. In most
cases the HMX’s will need to be removed to adequately seal
any punctures to the inside of the working air section and
prevent rusting of the box. This may void warranty if not
properly sealed.
Side Cover and Louver Attachment:
To seal the side covers or louver very little torque is needed
to tighten the screws. Over tightening will cause warping of
the cover or louver. Eight (8) 10 –32 stainless steel screws
are used to hold the louvers or covers on. The unit comes
with matching blind rivets mounted in the box.
Inside Cover, Figure 22
Step 9 –Water Supply Connections
Note: Do not turn water on unit till Step 15.
See Appendix 14 for line size and pressure charts.
CAUTION: Clean potable water should be connected to the
Coolerado air conditioner, see Appendix 1 Coolerado Water
Quality Requirements for more details.
Water lines should be insulated from heat sources such as the
sun to prevent overheating and scaling of the water. If the
water line insulation will see sun light at any point it should
be UV protected material. When hard water is heated, it
increases its scaling potential such as in a water heater.
NOTE: When choosing to insulate exposed water lines, UV
protection must be accounted for. If using non-UV rated
insulation, it is suggested to coat the insulation with a
weatherproofing finishing paint or jacket.
The instantaneous water flow rate to the HMX’s is the water
required when turned on by the water control board. The
water is turned off most of the time. A clean and consistent
water supply capable of instantaneous, dynamic flows of 51
GPH (gallons per hour) (193 LPH (liters per hour)) will be
required for the model M30, 85 GPH (322 LPH) M50, and 102
GPH (386 LPH) C60, for proper operation of the units.
NOTE: Install a hose bib at the main water line near the unit.
This will allow for quicker and easier servicing as well its
double use for cleaning the units.

Coolerado Installation
Page 15 of 53
It is also suggested to install ½ in. ball valves to the
main water line of the unit if installing multiple.
This will allow individual units to be shut off during
maintenance rather than shutting all units off.
The water connection is a ½” (12.7 mm) FNPT at the unit
base. The water pressure at this connection must be between
40 psi (225 kPa) and 80 psi (550 kPa). For your convenience,
Appendix 14 provides water pressure drop information. Note
that the water pressure will decrease 1 psi for every 27.7”
(9.8 kPa for every 1 m) of height do to gravity. So for a 30’
(9.14 m) rise, the water pressure will decrease by 13 psi (90
kPa), this does not include pressure drop due to friction in the
piping and pipe fittings.
Note: A Water Pressure Switch has been installed on the
water line inside the unit that will disconnect the fan control
wire turning the fan off until the water pressure rises again,
see Figure 25. This same switch is also on the M50A post 10-
28-2013 but will cut the cool call preventing the wetting out
of the unit and the fan from running.
This means a dirty water filter or low water main pressure will
turn the fan off. If the main water pressure is low a, booster
pump may be required.
CAUTION: Dynamic water supply pressure of between 25 PSI
(172 kPa) and 80 PSI (550 kPa) is required at the unit.
Water Consumption:
Water Consumption Table (per HMX), Figure 23.
WATER FILTER
WARNING: INSTALL the IN-LINE 30 micron WATER FILTER
supplied with unit. The water filter should be installed
upstream (before) any solenoid valves or water pressure
regulator on the Coolerado unit so that these devices will be
protected by the water filter.
CAUTION: Failure to install an in-line water filter will void
system warranty.
NOTE: In addition to water pressure, water quality has a
major impact on performance. Reducing undissolved
particulates increases performance and longevity of the
system’s heat exchangers.
The filter will need to be changed when the pressure drop
across the filter reduces the main line water pressure below
25 psi at the units when they are calling for water, the toilets
are being flushed and the irrigation system is running.
Realistically the water pressure needs to be at least 40 psi.
How fast a water filter needs to be replaced depends on the
amount of un-dissolved minerals or debris that is in the
water.
0.0
1.0
2.0
3.0
4.0
110
100
90
80
70
60
HMX Water Usage (gal/HMX-hr)
Ambient Temperature (F)
Coolerado Water Usage per HMX
0 F Dew Pt
20F Dew Pt
40F Dew Pt
50F Dew Pt
60F Dew Pt
70F Dew Pt
0.0
2.0
4.0
6.0
8.0
10.0
12.0
14.0
16.0
43
38
32
27
21
16
HMX Water Usage (Liters/HMX-hr)
Ambient Temperature (C)
Coolerado Water Usage per HMX
- 18C Dew Pt
- 7 C Dew Pt
4 C Dew Pt
10 C Dew Pt
16 C Dew Pt
21 D Dew Pt
Model
Number of HMX’s
M30
3
M50A
5
C60
6
NOTE:
1. Assume full product flow rate at 1400 cfm or 40
m3/min (M50)
2. Water usage rates are +/- 15%
3. Drain water equals approximately 25% of total
water usage and drains on a continuous basis

Coolerado Installation
Page 16 of 53
NOTE: If incoming water pressure is in excess of 80 psig (550
kPa), a pressure-reducing valve should be installed to the
incoming water supply line.
WATER PRESSURE REQUIREMENTS
NOTE: If incoming water pressure is ever less than 25 psig
(172 kPa) when the unit is running, a water pressure booster
pump may be required. District water line pressures are
often decreased due to irrigation activities, especially at
night. A minimum building pressure is generally 40 psi to
maintain the pressure at the unit of 25 psi when
considering water filter pressure drop, perhaps a water
softener, toilets being flushed, the units may be mounted
on the roof causing pressure loss due to gravity and height,
and the irrigation system running.
Low Water Pressure:
In certain locations, a reduction or potential loss of water
pressure can occur due to high demand conditions on the
municipal or district water supply. Install a booster pump to
ensure water pressure is maintained. If required, mount
booster equipment near ground level, see Figure 24.
Check Valve, CV
Booster
Pump
Pressure
Tank
Pressure
Gauge
Union
Relief Valve
Pressure
Sensor
Circuit Breaker
Disconnect (110VAC, 20 amp)
Control for Booster Pump
Need 25 psi (172 kPa)
Minimum at Coolerado Unit
By Contractor:
CV
Main Water Line
Hose Bib
Ball Valve
Water Booster, Hose Bib, and Ball Valve, Figure 24.
NOTE: Use a minimum of 1/2” (12.7 mm) diameter supply
water line, which should be free draining for winter shut
down.
BACK FLOW PREVENTION
NOTE: The unit is equipped with a self-draining water
regulating valve designed with a vacuum break in the HMX.
Water Distribution System –M50A, Figure 25
Freeze protection can be done manually:
1.) Install supply water shut off valve between the
water supply line and the unit.
2.) Install a drainage valve downstream of the manual
water valve. The drain valve should be located within
a conditioned space.
3.) Slope the line from the unit to the drain valve for
proper draining and freeze protection.
4.) To drain the line and water distribution system it
must be turned on for a few minutes to allow the
water to drain and air to pulled into the system. This
is done by turning the thermostat to require a cool
call.
WATER DISTRIBUTION SYSTEM
The water distribution system, (located inside the unit) is a
combination pressure regulator, 24 VAC solenoid valve and
water distributions manifold. The valve is designed to
deliverer the correct water flow to each of the systems heat
exchangers.
NOTE: Water Distribution System pressure should be
adjusted in the field according to:
20 30 40 50 60 70 80 90
M50 Watts 5.6 5.9 5.8 5.2 4.7 4.3 4.0
3.7
C60 Watts
5.0 5.8 5.9 5.5 5.0 4.6 4.2 3.9
M30 Watts
5.7 5.3 5.1 4.8 4.6 4.3 4.0 3.7
IRV-WPD Pressure Table - Vertical Pressure Gauge
Unit Type
Regulator
Type
Inlet Dynamic Pressure (psi)
Header Dynamic Pressure (psi)

Coolerado Installation
Page 17 of 53
Table 2: Water Header Pressure Settings.
EXAMPLE: If the Inlet dynamic main water pressure were 50
psi (344 kPa) when adjusting the regulator on an M50, the
pressure at the header would be set at 5.2 psi (36 kPa).
CAUTION: It is absolutely essential that the pressure
regulator be set to deliver the proper pressure at the water
distribution head before installation can be considered
complete. For the most accurate setting possible, take a
dynamic pressure reading at the point where the water
supply enters the water distribution head. This can be done
by temporarily installing a pressure gage immediately at the
point where the water supply enters the water distribution
header, as in the following picture, and adjusting the
dynamic pressure to the desired level, see Figure 26.
Water Header Pressure Location, Figure 26.
Step 10 –Electrical Power Connections
Note: Do not power on the unit until Step 15.
See Appendix 2 for Details.
See Appendix 4 for multi-unit wiring.
DANGER: To avoid personal injury or death, do not supply
power to unit with the units high voltage terminal box cover
removed.
CAUTION: Be sure field wiring complies with all local and
national fire, safety, and electrical codes, and voltage to
system is within limits shown on unit rating plate. Contact
local power company for correction of improper voltage.
See unit rating plate for recommended circuit protection
device.
NOTE: Keep wiring color coded according to system
drawings for easy troubleshooting and standardization. For
color code reference, see Appendix 2.
NOTE: Operation of the unit on improper line voltage
constitutes abuse and could affect unit reliability. See the
unit rating plate. Do not install unit in system where voltage
may fluctuate outside of normal voltage fluctuations
NOTE: Use copper conductors only between the disconnect
switch and the unit.
ROUTE GROUND AND POWER WIRES
DANGER: The unit cabinet must have an uninterrupted or
unbroken ground to minimize personal injury if an electrical
fault should occur. The ground may consist of electrical wire
or metal conduit when installed in accordance with existing
electrical codes. Failure to follow this warning can result in
an electric shock, fire, or death.
CAUTION: Without an uninterrupted or unbroken ground
the motor can have arcing across the bearings causing
premature failure of fan motor.
Remove access panel and electrical box cover to gain access
to unit wiring. Extend wires from disconnect through power
wiring hole provided and into unit control box. Size wires per
National Electric Code.
CONNECT GROUND AND POWER WIRES
The unit fan motors will run on 200 to 277 VAC, 50/60 Hz
single phase with an electrical circuit breaker of 5 amperes.
The transformers provided are 208 VAC or 240 VAC to 24 VAC
only. In some instances a 277 VAC is required and the
transformer can be requested at time of purchase.
15 amperes is generally the smallest circuit breaker that can
be purchased. Local electrical codes shall be applied and take
precedence over any recommendations given here.
The M50A has a terminal electrical box at the bottom of the
unit, see Appendix 10. Notice the Black Jumper wire with the
spade connection must be moved from the blank terminal to
the 208, 240 or 277 VAC terminals see Figure 27.
CAUTION: The transformer was not designed to power other
equipment.
138 207 275 344 413 482 551 620
M50 Watts 39 41 40 36 32 30 28 25
C60 Watts 34 40 41 38 34 32 29 27
M30 Watts 39 37 35 33 32 30 28 25
IRV-WPD Pressure Table - Vertical Pressure Gauge
Unit
Type
Regulato
r Type
Inlet Dynamic Pressure (kPa)
Header Dynamic Pressure (kPa)

Coolerado Installation
Page 18 of 53
M50B Electrical Power Connections, Figure 27
NOTE: The electrical access panels have screw holes to fit
most electrical box covers making it easy to install switches,
outlets, etc.
M30 Upper Electrical Knockout Location, Figure 28
M30 Lower Electrical Knockout Location, Figure 29
Internal Knockout On
Each Side In Front of
Filter On Each Side
M30 Internal Electrical Knockout Location, Figure 30
CAUTION: Line Voltage and Control wires must be routed
clear of any system components such as filter access doors
to prevent wiring chafing / electrical shorts.
CAUTION: Ensure line and control voltage wires are routed
away from terminal connections and control board.
CAUTION: Do not allow wiring to block access to filter door.
Step 11 –Thermostat Wiring
Note: Do not start unit till Step 15. See Appendix 2 for wiring
instructions.
CONTROL REQUIREMENTS
The control power is 24 VAC
Input call “Y” (1st stage cooling call) and,
0-10 VDC fan speed signal if applicable
NOTE: The water control board provides24 VAC (via
terminal RC) to be switched thru a dry contact back to
terminal Y.
The 0-10 VDC signal enables variable speed operation of the
fan motor.
M50B Control Terminal, Figure 31
NOTE: The efficiency of the Coolerado goes up significantly
as the speed is reduced, (4x at half speed), so variable speed
control is encouraged when possible.
NOTE: The thermostat should be mounted on an interior
building wall, free of drafts, and in an area unaffected by
heat producing machinery or appliances.

Coolerado Installation
Page 19 of 53
If using a single stage thermostat:
Unit Control
Thermostat
Color
RC
24VAC
Red
C
24COM
Black
Y
1st Stage Cooling
Yellow
To get the most benefit from the high efficiency motor in the
M30, M50, and C60 systems, a modulating variable fan speed
controller thermostat is used. See Appendix 3
If using the recommended variable control thermostat model
TEC2145-4:
Unit Control
Thermostat
Color
RC
24VAC
Red
C
24COM
Black
Y
FAN (COOLING)
Yellow
AIN
AO1 (0 to 10V)
Blue
Step 12 –Control Board Set-up and Operation
Note: Do not start unit till Step 15.
CONTROL BOARD DIP SWITCHES
There is a block of eight (8) dip switches located on the
control board. The first four (4) determine how much water is
delivered to the unit.
Switches 1-4 are pre-set at the factory as indicated in Table 3
(or see Appendix 5).
Switches 5 and 6 should be set to geographic elevation
conditions to ensure that water is used as efficiently as
possible.
If a variable speed thermostat is used, set control dip switch
setting 7 to the “on” position. This will vary the water flow
based on the amount of air flow. If dip switch 7 is set in the
off position, 10 VAC will be delivered to the fan motor control
wiring and it will run full speed whenever cooling is called for.
Dip switch setting 8 controls weather freeze protection is on
or off, see appendix 8 for additional installation details.
Freeze protection allows the unit to be automatically pulled
out of service during a cold spell but keep the unit ready for
cooling. It should not be used for end of season shut down
when cooling is no longer needed for an extended period of
time. In some locations cooling is required all year round but
still may experience temperatures below 32oF and require
shut down. There are cooling situations such as small data
centers where the water is turned off for winter operation
and only the fan is used to cool with outdoor air and the
freeze protection should be turn off. In this case the low
water pressure switch must be bypassed for the winter.
Caution: If dipswitch 8 is turned off the water control
program will not make any changes due to weather and
therefore must be manually winterized.
Dip switch
1
On (Preset at factory –do not change)
2
On (Preset at factory –do not change)
3
Off (Preset at factory –do not change)
4
Off (Preset at factory –do not change)
Elevation
0
2000’ (610M)
4000’ (1220M)
6000’ (1830M)
5
Off
On
Off
On
6
Off
Off
On
On
7
On for Variable Speed Fan, 0 to 10 VDC
OFF = Single Speed Fan Setting (10 VAC)
8
On Freeze Protection mode see Appendix 8
Table 3: Control Board Dip Switch Settings
Control Operation
See Appendix 3 or more information.
There are four (4) LED’s on the control board to indicate:
Control box power is on: the White LED is on
Regulating Solenoid valve is open (powered): the
Red LED marked “W” (for Water) is on
Thermostat is calling for cooling: the red LED marked
“C” (for Cool Call) is on
Flush cycle is on: the red LED marked “F” (for Flush)
is on
The water control board has a fan speed potentiometer
mounted on it. This is a single turn pot that controls the
maximum voltage going to the fan. If dip switch 7 is in the off
position the fan voltage can be turned between 0 and 10
VDC. If dip switch 7 is on then this pot will proportionally vary
the voltage received at the water control board allowing a
maximum fan speed to be set. The factor setting is full speed.
Step 13 –Thermostat
Note: Do not start unit till Step 15.

Coolerado Installation
Page 20 of 53
A standard thermostat can be used however most
thermostats do not have 0 to 10 VDC capabilities to drive the
Coolerado fully auto variable fan. For this reason Coolerado
sells a variable speed thermostat. This is a cooling only
thermostat, (heating is possible but requires a change over
sensor and relay that Coolerado does not provide nor
supports in any way).
See Appendix 6, Thermostat Operation (TEC2145-4). For
additional information on the thermostat see Appendix 2,
Wiring and Control Diagram and Appendix 4, Multiple Unit
Control Diagram for wiring configurations.
Step 14 –HMX Wet Out Logic
Note: Do not start unit till Step 15.
The unit is equipped with an automatic wetting system that
provides a significant boost to the heat and mass exchangers
wetting operations when the unit is powered up at initial
installation, for seasonal restart, or any other time that the
heat exchangers have dried out after the power has been
shut off.
Surfactant Reservoir, Figure 32
Surfactant Pump and Manual Primer Switch, Figure 33
The system consists of a small pump, a surfactant (soap)
reservoir, and a manual override switch. Units are shipped
from the factory with a full reservoir of surfactant solution.
To start up the system the pump and tubing will need to be
primed with wetting solution at installation.
The pump is controlled by the circuit board, and is engaged
any time the unit is powered up and there is a cool call. The
pump and surfactant lines must be primed full of surfactant
before the system is started for wetting heat and mass
exchangers. The pump will operate as long as the override
primer switch is held down.
When filters are changed, top off the reservoir with Dawn™
or Palmolive™ liquid dishwashing detergent.
NOTE: At installation or at any time that the unit has been
dried out, such as after winterization or vacation shut-off, it
is imperative to add a surfactant to the water supply to
allow the air conditioner heat exchangers to fully wet out.
After the heat exchangers have been wet out, water will
distribute itself evenly until the heat exchangers are dried
due to the water being turned off, or power being turned off
for an extended period of time.
The automatic wetting system is engaged anytime the unit is
powered up. Be sure to check the surfactant reservoir and
verify that it is full with wetting solution. Dawn or Palmolive
liquid dishwashing detergent can be used to top off the
reservoir prior to power up.
When the unit is powered up and a cooling call is made from
the thermostat, the water control board has been
programmed to engage the fan, solenoid valve, and the
surfactant pump. After 2.5 minutes the water and surfactant
will be turned off for 10 minutes. The water control board will