nvent HE11 User manual

© 2018 nVent 87976526
Rev. I P/N 10-1008-32
Heat excHanger
He11 Model
INSTRUCTION MANUAL

© 2018 nVent 87976526
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TABLE OF CONTENTS
PRINCIPLES OF OPERATION .......................................................................................................................................................... 3
INSTALLATION INSTRUCTIONS..................................................................................................................................................... 4
Design Data..................................................................................................................................................................................................... 4
Model Drawing................................................................................................................................................................................................ 5
Components List ............................................................................................................................................................................................ 6
WARRANTY ...................................................................................................................................................................................... 7
HOLD HARMLESS............................................................................................................................................................................ 7

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PRINCIPLES OF OPERATION
Hoffman®cooling air-to air heat exchangers cool and protect sensitive electronic control systems operating in
hostile factory environments.
Two entirely separate air circulation systems are used to transfer heat from inside the enclosure to the outside
atmosphere. The separated air ow systems are referred to as “closed loops”.
In one air circulation system (loop), heat from the air inside the cabinet is absorbed by the bottom half of the
heat pipe core. This enclosure air is continuously cooled and recirculated, assuring that only clean air comes in
contact with the electronic components. Outside (ambient) air, which might be dirty, is locked out of the sealed
cabinet.
The second circulation system utilizes ambient air to draw off heat from the top of the core.
Referring to the illustration, the heat pipe core contains a liquid refrigerant. A fan at the base of the exchanger
pulls heated cabinet air (black arrow) over the bottom half of the core. The refrigerant inside the core absorbs
heat from the cabinet air and the cooled air is blown back into the enclosure.
As the refrigerant liquid absorbs heat, it boils and turns into vapor, which rises within the core. Ambient air (light
arrows) is pulled into the outside atmosphere. This cools the vapor in the core, and it condenses back into liquid
form. The cooled liquid returns to the bottom half of the core, ready to begin the cooling cycle again.

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INSTALLATION INSTRUCTIONS
When mounting the heat exchanger to the electronic cabinet or enclosure the following procedures should be
followed:
When mounting to the enclosure, an opening must be provided as shown in Figure 1.
To protect the integrity of the closed loop design (see Principles of Operation), a die cut adhesive-backed
gasket tape is provided for sealing the heat exchanger to the enclosure-mounting opening. The gasket is
shipped already adhered to the heat exchanger.
WARNING! To avoid possible personal injury or property damage when the heat exchanger is to be
mounted on the enclosure door, be sure that the hinges will support the added weight of the heat
exchanger. Also, be certain that the heat exchanger does not over-balance the electronic cabinet when the
door is open, causing the cabinet to tip over.
Cutout
Figure 1
NOTE: Dashed lines represent outside of heat exchanger mounting plate.
DESIGN DATA
Model Voltage Hz Full Load Amps Phase Maximum Air Temp
(°F)
Shipping Weight
(lb.)
HE1116001 115 50/60 .4 1155 9.5
HE1126001 230 50/60 .2 1155 9.5

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MODEL DRAWING