Air/Air Heat Exchangers
Our PKS 3303 (NEMA 3R/4) Outdoor Air/Air Heat Exchangers are an ideal solution for a wide variety of applications. Closed loop design isolates external air from inside of enclosure without the need to change filter. Housing and Cover: electrostatically powder coated RAL 7035 (light grey)
Cooling Capacity Per Density (CCPD™) measures the cooling power per volume size of the unit. The PKS 3303 produces superior CCPD vs. conventional heat exchanger and/or heat pipe solutions. One of the most compact units for the available cooling capacity.
Utilizes lower temperature ambient air to cool warmer internal air without an active component such as a compressor which consumes high amounts of energy.
Closed Loop Design
Designed to isolate external ambient air from internal air eliminating the risk of contaminants entering the cabinet. Compared to Filterfans® with Rainhoods; the PKS seals against gaseous substances, humidity and airborne particulates such as dust, keeping it away from sensitive components within the electrical enclosure.
Width of the unit is maintained at 12 inches to fit onto the side of a smaller NEMA enclosure.
With only two mechanical components (fans), potential failure point is reduced to ensure continuous uptime of your processes.
Unit can be installed vertically or horizontally, allowing the cool air to be focused where it is needed most.
Compact lightweight design means that the unit can be installed by just one person.
Self Protected from Harsh Environments
Uniquely designed to operate in NEMA 3R, 4, and 4X environments. An example of this is the location of our control electronics within our dry, cool interior circuit.
Eliminates Hot Spots
High CFM fan with superior air flow, ideal for eliminating hot spots.
Technical Data Overview
|PKS 3303||115 V||230 V||400/460 V|
|POWER CONSUMPTION (W)||345||245|
|CURRENT CONSUMPTION (A)||<3||<2||<1|
|SPECIFIC COOLING CAPACITY (W/°C) / (W/°F)||150 / 83|
|DIMENSIONS W x D x H in||12 x 11 x 35*|
|WEIGHT lb (kg)(without packaging)||60 (27)||70 (31.7)|
|*Note the 3R/4/4x units have required louvers on the sides which add an additional 3” to the width and a rainhood on the front which adds an additional 4” to the depth.|
Cooling capacity Qv [W]
|AMBIENT TEMPERATURE RANGE||Min: -25°C / -13°F . . . +55°C / +131°F|
|CONTROL RANGE (adjustable)||20°C to 60°C (68°F to 140°F); Factory Setting 35°C (95°F)|
|REFRIGERANT TYPE||R 134a|
|DESIGN||Housing & Cover: powder coated RAL 7035 (light grey)|
Subject to technical amendments and misprints.
- INDUSTRY SOLUTIONS
- THERMAL MANAGEMENT
- SIGNALING TECHNOLOGIES
- LIQUID COOLING
- Pfannenberg Named a Top 20 Fast Track CompanySeptember 12, 2023 - 2:11 PM
- Pfannenberg’s Compact Packaged Chillers – Efficient and ReliableSeptember 6, 2023 - 4:04 PM
- Pfannenberg Announces M12 Compatible Audible and Visual Signaling SolutionsAugust 7, 2023 - 9:56 AM
- June is National Safety Month and Safety Starts with Understanding the SituationMay 30, 2023 - 9:23 AM