nvent 37V1-24143-001 User manual

© 2018 nVent 87976514
Rev. D P/N 10-1008-216
Direct Air cooling SyStem (DAcS)
37V1-24143-001, 37V2-48143-001 moDelS
INSTRUCTION MANUAL

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NOTE: Some of the information in this manual may not apply if a special unit was ordered. If
additional drawings for a special unit are necessary, they have been inserted. Contact Pentair
Equipment Protection if further information is required.
REVISION HISTORY
Revision Description of Change Who Effective date ECO#
1Added louvers to inlet JAT 12.DEC.2005 -
TABLE OF CONTENTS
Revision History.............................................................................................................................................................................................. 2
Model Number Nomenclature ........................................................................................................................................................ 3
Application........................................................................................................................................................................................ 3
Unpacking and Inspection............................................................................................................................................................... 3
Installation........................................................................................................................................................................................ 3
Wiring ................................................................................................................................................................................................ 4
Operation .......................................................................................................................................................................................... 4
Alarms............................................................................................................................................................................................... 4
Maintenance..................................................................................................................................................................................... 4
Replacement Parts......................................................................................................................................................................................... 4
Appendix 1- Technical Data ............................................................................................................................................................ 5
Appendix 2- Drawings...................................................................................................................................................................... 6
Appendix 3 - WARRANTY ................................................................................................................................................................ 7
HOLD HARMLESS............................................................................................................................................................................ 7

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MODEL NUMBER NOMENCLATURE
37V1-24143-001 means:
37= Approximate height of unit
V=ventilator unit
1= version 1(1st unit designed at 37 inches tall)
24=voltage DC
143= capacity expected i.e. 143 Watts dissipated for every 1°F rise in cabinet temperature above ambient.
001=revision and/or options.
Note: The nomenclature is not intended to provide technical details for any unit. It is merely a
guideline. For factual data, contact the factory.
APPLICATION
DACS (direct air cooling system) is designed to take outside air into the cabinet. Fresh air is circulated inside
the cabinet to cool the enclosure. This means of cooling is very effective and economical. However, there are
precautions that the user must be made aware of. Whenever you take outside air into a sealed cabinet, the risk of
bringing in airborne contaminates exists. The most prevalent is dust and water/moisture. System level testing at
desired conditions should be performed by the end user to ensure the system meets all required environmental
conditions.
To minimize the ingress of contaminates, these units are designed with a washable, replaceable metal mesh lter
located on the intake side of the DACS. This lter is designed to keep out larger particles and will not prevent dust
from entering. It will however reduce the amount of dust and water ingress. Additionally, the inlet is tted with
damper blades.
The exit/discharge side of the DACS is tted with louvers and damper blades. The louvers direct the exhaust
air downward and prevent most rain water from entering. The dampers are situated so that gravity causes the
damper blades to be in the closed position when the exhaust fan is OFF. If a strong wind impacts the dampers
from the outside, it will not allow the dampers to open when the fan is OFF. If a strong wind impacts the inlet
side of the DACS, it could pressurize the cabinet and cause the exhaust dampers to open. This will allow some
amount of outside air exchange even when the exhaust fan is OFF. To minimize this potential, the inlet is directed
horizontal to the ground and away from direct airow.
These DACS units are designed for the sole purpose of providing back up cooling only. It is not the primary
cooling method for this application.
UNPACKING AND INSPECTION
Directly upon receipt, inspect the unit. Check for concealed damage that may have occurred during shipment. Any
damage evident should be noted on the freight bill. Damages should be brought to the attention of the delivering
carrier within 15 days of delivery. Save the carton and packing material and request an inspection. Then le a
claim with the delivering carrier.
Pentair Equipment Protection cannot accept any responsibility for freight damage; however, we are ready to
assist you in any way possible.
INSTALLATION
Mounting hole locations and sizes are shown in the model drawing, see Appendix 2- Drawings on page 6.
The DACS unit must be installed with a gasket (provided in package). The gasket is installed on the enclosure
side of the DACS. If removal of the DACS is required, it is recommended the gasket be replaced.
Attach the power cord and alarm harness (not supplied with unit).
Unless the temperature is above the set point, the unit will not power. All units are factory tested prior to shipping.
Due to the simplicity of the unit, testing on site may not be required. However, if it is required, the cover panel
needs to be removed and the thermostat adjusted to below the current ambient temperature of your location. This
will power the exhaust fan. After testing, ensure the proper set point is re-applied. See Operation on page 4.

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WIRING
Wiring details are provided in Appendix 2- Drawings on page 6, Wire Schematic
OPERATION
These DACS units incorporate a very simple, cost effective, and reliable control scheme. The main control is an
adjustable thermostat. It is normally closed and will open on temperature rise. The thermostat is connected to the
PWM (pulse width modulation) wire of the fan and the ground wire of the fan. When the temperature is below the
set point, the contacts are closed. This directly connects the PWM wire of the fan to ground and causes the fan to
stop running. Essentially, it is a PWM input of 0%. When the desired set point temperature is reached, the contacts
open. The PWM wire is no longer connected to ground. The fan sees this as a PWM input of 100%. The fan then
reaches maximum speed. When the temperature drops, the fan will turn off.
The thermostat is factory set to 130 F (55 C)
On temperature rise, the exhaust fan will turn on above: 130 F (55 C)
On temperature fall, the exhaust fan will turn off below: 117 F (46 C)
Note: Temperatures given above do not include any variance in operator set point or tolerance
of thermostat device. These temperatures are nominal, not exact.
ALARMS
There is a single alarm output from these DACS units. It is a high temperature alarm. This alarm is a normally
open contact. The contacts will close on temperature rise above 65 C. To clear an alarm, the temperature needs
to drop below 50 C.
There are several reasons why a high temperature alarm will exist. First, the primary cooling system has failed.
In addition to the primary cooling system failure, the secondary backup unit, DACS, has also failed in one way or
another. It could be either the exhaust fan has failed, or lack of sucient airow caused by blockage of the inlet
or exhaust.
The alarm connector is two ¼” male spade terminals on the DACS side. The mating connector is two female ¼”
spade terminals. The alarm is not polarity dependent.
MAINTENANCE
There is no required routine maintenance for a back up cooling system. However, it is always a good idea to
inspect the entire cabinet including thermal cooling systems, when a technician is on site.
Some things to look for are:
• Damage to sheet metal that may allow the fan to rub during operation or ingress of debris into the cabinet.
• Dirty lter.
• Blocked airow paths.
• Connector integrity. Ensure a good clean connection with no damage to wires.
• Listen for loud noises or excessive vibration.
The latter, can only be noticed if the main cooling system has been disabled and the cabinet temperature has
reached the DACS set point. Clearly, there are bigger problems if the DACS unit is even running.
REPLACEMENT PARTS
Part Number Description
10-1033-21 Alarm- snap disc type
10-1061-14 Thermostat Control
10-1000-84 Filter
10-1091-61 24VDC Impeller/Fan
10-1091-65 48VDC Impeller/Fan
37-1110-00 Gasket, Mounting
All others Contact Factory

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APPENDIX 1- TECHNICAL DATA
Model No.: 37V1 37V2
Rated voltage DC 24 V DC Nominal
(19 V DC to 30 V DC) 48VDC (32VDC to 60VDC)
Rated current DC 4.5 A (DC) 2.3 A (DC)
Dimensions
Width
Height
Depth
20.82” including rails
37.67”
7.5”
20.82” including rails
37.67”
7.5”
Position Vertical Mounted Vertical Mounted
Material G90U Galvanized 20 ga. and
Polyester Urethane Powder Paint G90U Galvanized 20 ga. and Polyester Urethane Powder Paint
Useful cooling output (in cabinet) 143W/°F estimated 143W/°F estimated
Internal Airow circuit
(in cabinet) 500 SCFM 500 SCFM
Temperature range • Internal –20°C to +65°C
• External –40°C to + 55°C
• Internal –20°C to +65°C
• External –40°C to + 55°C
Temperature control • Thermostat Control • Thermostat Control
HX Alarm
(Normal=Open/Error=Close) >65°C high temp = Close >65°C high temp = Close
Alarm connector(unit side) Two ¼” Male Spade terminals Two ¼” Male Spade terminals
DC connector 3-Pin AMP MATE-N-LOK
P/N 350767-1 Cap Housing
P/N 350561-1 Pins
3-Pin AMP MATE-N-LOK
P/N 350767-1 Cap Housing
P/N 350561-1 Pins
Noise(1.5M away, 1M High) tbd tbd
Weight 36lbs 36lbs

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APPENDIX 2- DRAWINGS
Model Drawing for 37V1 and 37V2
AMP Mate-N-Lok
3-pos. panel
connector
N.O. – Close
on temp. rise
¼” Q.C. male
spade terminals
Adjustable Thermostat
N.C. – Open on temp. rise
Wire Schematic

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APPENDIX 3 - WARRANTY
Please note: Warranty effective at time of shipment. Pentair Equipment Protection warrants that all
material and workmanship are free of defects in quality which impair the usefulness of the thermoelectric
cooler or heat exchanger for a period of ve (5) years for nonoperating parts, except for the lter; and for
one (1) year for everything else when installed and operated under the following conditions:
A. Maximum voltage variation no greater than plus or minus 10% of nameplate nominal rating.
B. Maximum frequency variation no greater than plus or minus 3 Hz. of nameplate nominal rating.
C. Must not exceed minimum and maximum stated temperatures on the nameplate.
D. Not to exceed (BTU/Hr.) rating, including any heat sink, as indicated on the nameplate.
E. The unit must not be restarted for a period of one (1) minute after intentional or accidental shut-off.
(This does not apply to heat exchanger or lter fan.)
Pentair Equipment Protection warrants that all material and workmanship are free of defects in quality
which impair the usefulness of the lter fan package and all custom thermoelectric coolers and heat
exchangers for a period of one (1) year, except for the lter, when installed and operated under conditions
A, B, C and D as listed above.
Not covered in this warranty is damage to the thermoelectric cooler or heat exchanger due to the
introduction of other than the nameplate-designated refrigerant. Operation of any Pentair Equipment
Protection product that has not been designed with proper protective coatings and/or options and is in an
abnormal or corrosive environment voids the warranty. Prolonged operation with dirty lters also voids the
warranty.
Should any part prove defective within the above warranty period, the customer may choose to return
the defective product that is under warranty to Pentair Equipment Protection for repair at no charge or
the customer has the option to repair the defective products at his own expense and Pentair Equipment
Protection will supply repair parts at no charge providing the defective part is returned and found to
have failed under warranty. Parts supplied as warranty replacement parts will assume the balance of the
warranty on the part returned for warranty consideration.
Please be advised: According to the Federal Register, no person maintaining, servicing, repairing, or
disposing of appliances may knowingly vent or otherwise release into the environment any class I or class
II substance used as refrigerant.
Pentair Equipment Protection assumes no liability beyond the repair or replacement of its own product.
Customer modication of any Pentair Equipment Protection product voids this warranty.
The purchaser assumes the responsibility of grounding the unit and installing it in accordance with local
electrical and safety codes, as well as the National Electric Code (NEC) and OSHA.
THIS EXPRESS WARRANTY CONSTITUTES THE ENTIRE WARRANTY WITH RESPECT TO THE
PRODUCT AND IS IN LIEU OF ALL OTHERS, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY
OR MERCHANTABILITY AND WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE AND IN
NO EVENT IS PENTAIR EQUIPMENT PROTECTION RESPONSIBLE FOR ANY CONSEQUENTIAL
DAMAGES OF ANY NATURE WHATSOEVER.
HOLD HARMLESS
In consideration of purchase of equipment from Pentair Equipment Protection by a customer, Pentair
Equipment Protection agrees to indemnify and hold harmless such customer and users with a defense,
as to any claim, demand, statutory court cost, fees for attorney’s services provided for below, and/
or judgment, for actual of alleged patent infringement in any country, arising out of the use, sale or
advertisement of any equipment manufactured or sold by Pentair Equipment Protection to Pentair
Equipment Protection’s own specications, provided that the customer or user shall promptly notify
Pentair Equipment Protection in writing of any such claim or demand, provided further that Pentair
Equipment Protection shall have the right and option to undertake and control the entire defense of such
claim, or demand instituted against the customer or user, but limited to the products made or sold by
Pentair Equipment Protection, through counsel selected by Pentair Equipment Protection, and to settle
and pay any claim award arising out of such claim or demand, and provided further that the customer or
user will provide such information and assistance as Pentair Equipment Protection may request subject
to reimbursement by Pentair Equipment Protection for any out-of pocket expense incurred in providing
such requested assistance. Liability of Pentair Equipment Protection for any infringement or claim thereof
shall be limited to the above undertaking

© 2018 nVent 87976514
Rev. D P/N 10-1008-216
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