Coolerado C60, M30 User Manual
COOLERADO CORPORATION 4430 GLENCOE STREET, DENVER, COLORADO 80216
INSTALLATION AND SERVICE PROVIDER
COMPANY______________________________________
ADDRESS_______________________________________
_______________________________________________
_______________________________________________
_______________________________________________
TELEPHONE_____________________________________
Coolerado Installation Manual
M30, M50A, C60
Version 2013-4
Date: 4-9-2014
WWW.COOLERADO.COM
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
Equipment Information
Unit Model #
Unit Serial #
Thermostat Make
Thermostat Model #
Initial Installation Start-up Data Sheet
MUST BE COMPLETED AFTER INITIAL INSTALLATION
Page 2 of 50
Table of Contents
Safety Considerations 4
Installation Recommendations 4
Installation Steps
Step 1 – Check Equipment and Job Site 5
Step 2 – Inspect Filters and Heat Exchanges 6
Step 3 – Clearance Requirements 7
Step 4 – Install on Solid and Level Foundation 7
Step 5 – Drain Connections 8
Step 6 – Outdoor Intake Air 9
Step 7 – Conditioned Air Ducts 9
Step 8 – Working Air Ducts 11
Step 9 – Water Supply Connections 13
Step 10 – Electrical Power Connection 15
Step 11 – Thermostat Wiring 16
Step 12 – Control Board Set-up and Operation 17
Step 13 – Thermostat 17
Step 14 – HMX Wet Out Logic 18
Step 15 - Operational Startup 19
Step 16 – Final Checks 19
Post Installation / Seasonal Start-up 20
Normal Operating Procedure 20
Seasonal Shutdown 20
Care and Maintenance 21
Appendix
Appendix 1 – Coolerado Water Quality Requirements 23
Appendix 2 - Wiring and Control Diagram 24
Appendix 3 – Coolerado Thermostat Wiring Picture 25
Appendix 4 – Multiple Unit Control Diagram 26
Appendix 5 – Water Control Board / Indicators / Dip Switch Settings 27
Appendix 6 – Thermostat Operations for (TEC2145-4) 28
Appendix 7 – Thermostat Programming (TEC2145-4) 29
Appendix 8 – M30 Dimensional Specifications 30
Appendix 9 – M30 Air Flow Performance Table 31
Appendix 10 – M50A Dimensional Specifications 32
Appendix 11 – M50A Air Flow Performance Table 33
Appendix 12 – M50A Curb Mount Unit 34
Appendix 12 – C60 Dimensional Specifications 36
Appendix 13 – C60 Air Flow Performance Table 37
Appendix 14 – Water Pressure Charts 38
Appendix 15 – Limited Warranty 40
Appendix 16 – Installation Check List 42
Appendix 17 – Preventative Maintenance, (PM) Checklist 47
Appendix 18 – Troubleshooting 48
Page 3 of 50
Page 4 of 50
Coolerado Installation
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 attempt
to sit, stand, or climb or store.
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.
1.) The unit may be installed either indoors or outdoors.
2.) Flexible duct connectors should be installed between
any rigid ductwork and the unit to allow for leveling
requirement and to mitigate vibration.
3.) 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.
4.) Be sure to provide adequate support for the unit and
associated ductwork.
5.) Be sure that there is no exposure to flammable
vapors, excessive dust, or other contaminants in the
air.
6.) To obtain the greatest cooling capacity, air will need
to flow into and out of the unit as freely as possible.
7.) Humid working air must be allowed to flow freely
away from the unit and directed away from the
unit’s intake air supply. If ducted, ensure adequate
condensate drains are available.
8.) The intake air opening must be kept free from
obstruction and allowed to draw in fresh dry air.
9.) The conditioned air must be unobstructed to the
building or space to be cooled.
10.) All ductwork must be properly sealed and insulated.
11.) Keep all ductwork runs as short as possible between
the unit and conditioned space.
12.) If exhaust ducts are needed they must be sealed.
13.) If unit is installed outdoors, install rain shields as
needed.
14.) In unheated environments, provide adequate freeze
protection for system water supply and drain.
Page 5 of 50
Coolerado Installation
15.) Ensure level mounting to allow the internal water
distribution to work correctly.
16.) 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.
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 the 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
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 box.
Page 6 of 50
Coolerado Installation
Model
Pleated Filter Size
M30
2”x20”x25” pleated (50x500x625mm), nominal
1.75”x19.5”x24. 5” (44.5x495x622mm), actual
M50
2”x20”x25” pleated (50x500x625 mm), nominal
1.75”x19.5”x24. 5” (44.5x495x622mm), actual
C60
2”x20”x25” pleated (50x500x625 mm), nominal
1.75”x19.5”x24. 5” (44.5x495x622mm), actual
Care should be taken not to rack or torque the units
when moving units or lifting units into position as this
may cause poor door fitting, Heat and Mass Exchanger
racking and leaking, air leaks, etc.
M50A 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.
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.
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.
5.) Units are shipped with filters.
Page 7 of 50
Coolerado Installation
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
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
Filter image, Figure 5
Step 3—Clearance Requirements
1.) Inspect clearances and position 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.
NOTE: Take precautions no to block service areas of unit,
and that ductwork connections have enough flexibility for
leveling or seasonal re-leveling purposes.
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.
Clearance Requirements, Figure 7
Step 4— Install on a Solid and Level Foundation
1.) 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.
2.) Take the proper precautions when mounting the
unit to reduce noise and vibration.
3.) If mounted on rafters use appropriately sized
vibration damping springs and duct isolation
attachments.
4.) If installed on a roof, in an attic or somewhere else
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 at bottom four (4) corners
with ¼” (6.35 mm) x 20 mounting bolts that can also be used
for installation attachment to a frame.
Page 8 of 50
Coolerado Installation
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.
Step 5 – Drain Connections
NOTE: The units drain connection is located underneath the
unit’s intake air plenum.
1.) Install system drain piping
A drain line must be connected to the:
o M30 or C60 - 1½” (38.1 mm) ABS female slip
connection
o M50A - can be 1 ½” (38.1 mm) pipe over
If local or state codes allow drain water to be
outside; 1 ¼” (31.75 mm) inside or 40mm
deeper inside
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).
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.
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
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.
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.
Page 9 of 50
Coolerado Installation
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)
Step 6—Outdoor Intake Air
NOTE: The intake air duct must not be located near the units
working air duct.
1.) 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:
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.
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:
High Parapet Walls, Figure 11
1.) 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.
2.) Seal duct work.
3.) If the conditioned air ducts are located external to
the building or in an attic space, a minimum of R6
Page 10 of 50
Coolerado Installation
insulation is required. Follow local building and
insulation code requirements.
4.) Size ducts to about 0.08 inches of water column per
100 feet (66 Pa per 100 m) of duct.
5.) Maximize the trunk duct and minimize the length of
duct branches, see Figure 13.
6.) Too many air-drops can cause excessive temperature
losses.
7.) Large, non-mixing type diffusers (positioned low) are
recommended.
8.) 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.
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
as pressure drop will occur, impeding air-flow.
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.
Example Conditioned Air Plenum Duct Connection Figure,
15.
Page 11 of 50
Coolerado Installation
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.
Installation Example, Figure 18
Step 8 – Working Air Ducts, (unit exhaust)
1.) If installed outside with good ventilation install
louvers.
2.) If units are located inside or multiple units are
mounted side by side requiring a common working
air duct:
a. Seal ducts to prevent condensation from leaking
from the ducts
b. Provision 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.
c. Ducts may be cut in the top or on either side of
any of the units, see Appendices 8, 10 and 12.
Barometric Damper Example, Figure 17
Top Mounted Exhaust Example, Figure 19
Page 12 of 50
Coolerado Installation
CAUTION: All duct connections to the unit’s 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 19 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 out let 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).
Exhaust Louvers, Figure 20
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.
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.
Inside Cover, Figure 21
Page 13 of 50
Coolerado Installation
Model
Number of HMX’s
M30
3
M50A
5
C60
6
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.
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.
The water connection is a ½” (12.7 mm) FNPT at the unit
base. The water pressure at this connection must be between
25 psi (172 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 24. This same switch is also on the M50A post 1028-2013 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 water main 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 22.
WATER FILTER
WARNING: INSTALL the IN-LINE 30 micron WATER FILTER
supplied with units. 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 systems
heat exchangers.
Page 14 of 50
Coolerado Installation
Check Valve, CV
Booster
Pump
Pressure
Tank
Pressure
Gauge
Ball Valve
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
Header
Soap Tee
Solenoid
Valve
Regulator
Low Water
Pressure Switch
Filter Door
Fan Switch
Soap
Bottle
Fan
The filter will need to be changed when the pressure drop
increases to the point not enough water pressure is available
for the units. How fast a water filter needs to be replaced
depends on the amount of un-dissolved minerals or debris
that is in the water.
NOTE: If incoming water pressure is excessive 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. Water district water line pressure is
often loss from due to irrigation activities especially at
night.
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 23.
Water Booster, Figure 23.
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
Water Distribution System – M50A, Figure 24
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: The unit is equipped with a self-draining water
regulating valve designed with a vacuum break in the HMX.
Page 15 of 50
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