KOOLTRONIC KPHE39 Water-to-Air Heat Exchangers provide uniform cooling in a closed-loop system where a reliable source of clean, cool water is available. The KPHE Series is designed primarily for use in harsh environments with cooling requirements in excess of the capabilities of Air-to-Air Heat Exchangers. 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 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 ability of the KPHE 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.
ALUMINUM CABINET: Where light weight and/or compatibility with appearance of Aluminum Enclosures are required. Unpainted Type 5052 is standard. Other types and ultra-violet-resistant baked powder finish are available. Append "A" to Part No. (5052 Unpainted)
AUTOMATIC WATER FLOW REGULATING VALVE: As supply water temperature and/or heat variances occur, this valve senses the return air temperature and modulates the water flow to provide cooling at the adjustable pre-set level. Append "W" to Part No.
COOLING EFFECT DETECTOR: 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. Append "B" to Part No.
EXCESS HEAT DETECTOR PACKAGE: Senses a rise in return air temperature if cooling water becomes too warm, water flow is too low or if blower malfunctions. When set point is exceeded, the signal circuit activates a user-supplied warning device. The thermostat is factory-set to activate at 90°F, but may be adjusted by the user. The low voltage power for the signal circuit is supplied by the user. Excess Heat Detector and HighWater Level Detector Packages share common components and are usually or-dered together. If only Excess Heat Detector is needed, the CoolingEffect Detector is a more economical choice Append "D" to Part No.
HIGH WATER LEVEL DETECTOR PACKAGE: 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. Append "C" to Part No.
INTERNAL CORROSION PROTECTION: For corrosive or other hostile environments, special coating material is applied to copper lines, coils and other parts subject to damage. Also see Stainless Steel Cabinet or Integrity NEMA 4/4X Air Conditioners. Append letter "H" to Part No. LIFTING EYES: Heavy-gauge steel lifting eyes, attached to the side panels, assist in positioning units. Append letter "K" to Part No.
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. Append letter "M" to Part No.
MOUNTING HINGE: (Left-hand or Right-hand) Allows the Air Conditioner itself to be used as a cabinet door. (Caution: The cabinet must be able to support the full weight of the unit in open position.) Specify left-hand or right-hand, determined by facing the mounting side of the Air Conditioner. Append letter “P” to Part No. for left-hand. Append letter “S” to part No. for right hand.