KNHE32 - KNHE32 Water-to-Air
- Brand: Kooltronic
- Product Code: KNHE32
Description:
Description
KOOLTRONIC Water-to-Air Heat Exchangers provide uniform
cooling in a closed-loop system where a reliable source of clean, cool water is
available. The KNHE Series was designed primarily for
use in harsh environments with cooling requirements in excess of the capabilities
of air-to-air heat exchangers or air conditioners. They are particularly useful
in highly contaminated environments that would require very frequent cleaning or
changing of ambient air filters, or require frequent cleaning of the heat exchanger
core. KOOLTRONIC KNHE NEMA 4/4X Water-to-Air Heat Exchangers
can furnish greater cooling capacities than air-to-air models, depending on water
temperature and rate of flow. Ambient air is sealed out; heat transfer surfaces
remain clean.
The higher cooling capacity of the KNHE Series depends
on the temperature of the cooling water. Thus, if the water is cold enough, the
temperature of the air delivered to the electronics cabinet can actually be lower
than that provided by air conditioners, at less cost. This unit combines the best
features of the NEMA 4/4X heat exchangers with the increased cooling capacity offered
by the water-to-air models, in addition to the added benefit of compact size.
KOOLTRONIC also designs and manufactures a variety of heat exchangers to meet
unique specifications. We invite your inquiries about our modification and
custom-design capabilities.
Description:
Description
KOOLTRONIC Water-to-Air Heat Exchangers provide uniform
cooling in a closed-loop system where a reliable source of clean, cool water is
available. The KNHE Series was designed primarily for
use in harsh environments with cooling requirements in excess of the capabilities
of air-to-air heat exchangers or air conditioners. They are particularly useful
in highly contaminated environments that would require very frequent cleaning or
changing of ambient air filters, or require frequent cleaning of the heat exchanger
core. KOOLTRONIC KNHE NEMA 4/4X Water-to-Air Heat Exchangers
can furnish greater cooling capacities than air-to-air models, depending on water
temperature and rate of flow. Ambient air is sealed out; heat transfer surfaces
remain clean.
The higher cooling capacity of the KNHE Series depends
on the temperature of the cooling water. Thus, if the water is cold enough, the
temperature of the air delivered to the electronics cabinet can actually be lower
than that provided by air conditioners, at less cost. This unit combines the best
features of the NEMA 4/4X heat exchangers with the increased cooling capacity offered
by the water-to-air models, in addition to the added benefit of compact size.
KOOLTRONIC also designs and manufactures a variety of heat exchangers to meet
unique specifications. We invite your inquiries about our modification and
custom-design capabilities.
Data
Closed-Loop Cooling
- The enclosure interior airflow system is isolated from the ambient airflow or waterflow system. No ambient air can invade the cool, dehumidified sensitive component compartment.
NEMA 4/4X Rating Maintained (UL50)
- All units are fully gasketed for tight, leakproof installation, in compliance with the NEMA 4 and 4X Enclosure Ratings.
Stainless Steel Shell
- For applications in corrosive or other hostile environments such as those requiring Internal Corrosion Resistant Coatings, especially where chemical/moisture combinations are present.
Automatic Water Flow Control
- This control consists of a temperature control thermostat and a solenoid valve. When the temperature within the enclosure drops below the thermostat set point due to decreased load or decreasing water temperature, the thermostat closes the solenoid valve. When the temperature increases to the set point (plus a differential) the thermostat opens the solenoid valve and the supply water cools the enclosure. In most models the Automatic Water Flow Control also includes a bypass flow meter which allows a small amount of water (0.25 gpm) to pass through the heat exchanger at all times.
High Water Level Detector
- Closes water-supply valve to prevent flooding if excess water accumulates in the drain pan. Signal circuit activates a user-supplied warning device. The low voltage power for the signal circuit is supplied by the user.
Internal Corrosion Protection - KNHE Series
- This protection increases reliability in hostile environments. This protection for the cooling system consists of an air cured coating applied to the brazed joints, providing a degree of protection from corrosive environments. This coating will withstand 1000 hours of salt spray per the ASTM B 117 test method. NOTE: Severe operational environments such as wastewater treatment and salt spray are likely to cause corrosion failure over a period of time regardless of coating. This coating provides protection to the external portion of the coil and does not protect from any corrosive elements in the cooling water used internally. Warranty: Corrosive conditions may affect the warranty coverage. Consult factory for warranty limitations in corrosive environments. NOTE: For additional corrosion protection options, contact factory.
Low Airflow Detector
- Similar to the Airflow Switch shown in the Blower Accessories Section, the switch is installed in a suitable location in the air conditioner to detect loss of airflow, and sends a signal to a terminal block, through which user-installed wiring and warning devices are activated.
Temperature Alarm
- A thermostat is mounted inside the cabinet and attached to a sensor in the warm air return. When the air temperature increases to the set point, a signal is sent to a terminal block. User-installed wiring from the terminal block to local and/or remote warning devices (light, bell, siren, etc.) can be for normally open or closed operation.
Data Sheet
KNHE32 Data Sheet [370Kb]
GA Drawing
KNHE32 General Arrangement Drawing [51Kb]
Installation Instructions
KNHE32 Installation Instructions (2 pages) [241Kb]
Literature
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Kooltronic Standard Warranty [55Kb]
Kooltronic Unit Longevity Press Release [167Kb]
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Short-Form Catalog (16 pages) [897Kb]
Airflow Switch Data Sheet [159Kb]
Heat Exchanger Quick-Sheet [90Kb]
Laboratory Environmental Testing Services [157Kb]
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Operator's Manual
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