Internal Door mount
HEX120PA series
Dimension drawing
Features Unit
◆ IP55 waterproof at external side
◆ Standalone temperature control W/K (W/℉
◆ RS-485 function
◆ Clear LED status indicator
◆ Dry contact alarm output
Design °C
◆ Air to air heat exchange
◆ Rated voltage at 48V
◆ High efficiency and reliable fan
◆ Easy installation and maintenance
Operating temperature range -10 ~ +65
* Note : The cooling capacity (W/K , W/°C or W/℉) is defined as Q/ (T
Q : Heat dissipation (W) from inside of cabinet
T
T
* Specifications are subject to change without notice.
Main feature Specification
Dimension (H x W x D)
Cooling capacity
Rated voltage 48
Operating current 4.1
Opearting power 197
Operating voltage range 40 ~ 60
Noise (1.5 meter) 64.0
Weight 33 (73)
: Return temperature of internal air circuit (K , °C or ℉)
I
: Ambient temperature of external air circuit (K , °C or ℉)
A
*Note
mm
(in)
VDC
A
W
VDC
dB-A
Kg (Lb)
1151 x 471 x 193
)
(45 x 19 x 8)
120 (67)
I-TA
)
HEX120PA Heat Exchanger
Instruction Manual
Table of contents
1. Version ......................................................................................................... 1
2. Description ................................................................................................... 1
2-1. General ................................................................................................ 1
2-2. Specification ....................................................................................... 1
2-3. Environmental condition ................................................................... 2
3. Installation ................................................................................................... 2
3-1. Outline drawing .................................................................................. 2
3-2. Mounting panel cutout and waterproof sticking .............................. 3
4. Electrical specification ................................................................................ 3
4-1. Connection and LED indicator (on HEX panel) ................................ 3
4-2. Standalone control mode ................................................................... 4
5. Mechanical feature ...................................................................................... 5
5-1. Thermal path and Airflow baffle ....................................................... 5
5-2. Configuration ..................................................................................... 6
6. Maintenance and Replacement .................................................................. 6
6-1. Maintenance ....................................................................................... 7
6-2.Replacement ....................................................................................... 8
7. MTBF and Reliability ................................................................................... 8
7-1. MTBF................................................................................................... 8
7-2. Relibability ......................................................................................... 8
8. Safety ............................................................................................................ 9
9. General Safety and Warnings ..................................................................... 9
HEX120PA Heat Exchanger Instruction Manual
1. Version
Rev. Description Drawn Approved Issue date
00 Issue spec. Nick Wang Adam Chen 2016/1/25
01 Add section 9 Nick Wang Adam Chen 2016/6/10
2. Description
2-1 . General
Delta Heat Exchanger (HEX) is designed for direct air to air heat
exchange to remove heat from the cabinet.
The internal and the external air circulation loops of the HEX are
separated to prevent the introduction of dust, humidity and dirt. The fan on
the external air loop conforms to IP55 protection rating.
2-2 . Specification
Outline Dimension (H x W x D)
Cooling Capacity (*Note 1)
Rated Voltage VDC 48
Rated Current (*Note 2) A 6.0
Operating Voltage Range VDC 40 - 60
Operating Current A 4.1
Operating Power Consumption W 197
Acoustic Noise at 1.5M (SPL) dB-A 64.0 dB-A
Weight Kg (Lb) 33 (73)
Main feature Unit
mm
(in)
W/K (W/℉)
Model Number
HEX120PA
1151 x 471 x 192
(45 x 19 x 8)
120 (67)
* Note1 : The cooling capacity (W/K , W/°C or W/℉) is defined as Q/ (TI-TA)
Q : Heat dissipation (W) from inside of cabinet
TI : Return temperature of internal air circuit (K , °C or ℉)
TA : Ambient temperature of external air circuit (K , °C or ℉)
*Note 2 : Rated current is announcement of safety
Page 1
2-3 . Environmental condition
Description Specification
HEX120PA Heat Exchanger Instruction Manual
Operating
Storage
Humidity
Ingress protection
(on external side)l
3. Installation
3-1 . Outline drawing
-10°C ~ +65°C (-14°F ~ 149°F)
-40°C ~ +70°C (-40°F ~ 158°F)
External air circuit: 0 ~ 100% RH
IEC60529 IP55 (NEMA 3)
GR-487 720hrs salt spray
(1) Material : SGCC sheet t=1.0mm
(2) Finish : Power paint , Color RAL7035
(3) Dimensional tolerance : ± 1mm [0.04”]
Page 2
HEX120PA Heat Exchanger Instruction Manual
3-2 . Mounting panel cutout and waterproof sticking
：
4. Electrical specification
4-1. Connection and LED indicator (on HEX panel)
Connection
Dry contact max. rating : 60VDC/400mA
User can select dry contact definition both normal open (N.O.) or normal
close (N.C.) themselves for alarm output that is shown as next page
Page 3
HEX120PA Heat Exchanger Instruction Manual
Definition N. O N. C
Connection Pin 3 , 4 Pin 5 , 4
Control board, NTC and fan are in
normal status
OPEN CLOSE
Power-off or control board is disabled CLOSE OPEN
NTC resistance is over range such as
“open circuit” or “short circuit”
Fan speed is lower than 50% of
definition or fan is locked
CLOSE OPEN
CLOSE OPEN
LED indicator
Fan NTC sensor
Normal GREEN GREEN
Abnormal or failed RED Blinking RED
4-2. Standalone control mode
HEX can detect ambient temperature to control cooling capacity .
Internal fan and external fan speed default settings are shown as below
Full speed : 2300 RPM ± 10%
Half speed : 1150RPM ± 200RPM
Page 4
HEX120PA Heat Exchanger Instruction Manual
5. Mechanical feature
5-1 . Thermal path and Airflow baffle
With forced convection using the centrifugal fan, warm air generated
by the equipment will be blown into the internal return opening and pass
though the HEX, then flow out from internal supply opening. The air supply
of the cold air will be used to cool down the system; On the opposite side,
cooler air from the surrounding environment will be drawn in from the
external air inlet side , and push the heat of the HEX out from the external
air exhaust side. The thermal exchange path is shown in the figure on next
page .
Page 5
HEX120PA Heat Exchanger Instruction Manual
5-2 . Configuration
Item Q'ty
Description
1 1 Chassis assy
2 2 Frame assy
3 1 Controller
4 1 Internal fan
5 1 External fan
6 1 Heat exchange CORE
7 1 Internal plate assy
8 1 External plate assy
6. Maintenance and Replacement
Be sure to SHUT DOWN the power before proceeding with any
maintenance or component replacement .
Page 6
6-1. Maintenance
Monthly
both internal/external air inlet and air outlet opening .
Quarterly
HEX120PA Heat Exchanger Instruction Manual
Use brush and low pressure air to remove the dust or any debris on
Follow below maintenance sequence
Internal loop maintenance :
* The maintenance is from internal side .
* Use screw driver to remove secured screw on upper
portion of chassis assy (Item 1) .
* Disassemble the internal plate assy (Item 7) and disconnect
fan from controller (Item 3) , Note the connection location .
* Use brush and low pressure air to remove dust on internal
plate assy (Item 7) , internal fan (item 4) & heat exchange core
opening .
* Hold internal plate assy (Item 7) and connect fan to controller
(Item 3) .
* Re-attach internal plate assy (Item 7) and use screw driver to
secure screw with chassis assy (Item 1) .
External loop maintenance :
* The maintenance is from internal side .
* Use screw driver to remove secured screw on bottom
portion of chassis assy (Item 1) .
* Disassemble the external plate assy (Item 8) much
carefully to avoid waterproof foam between around external
plate assy (Item 8) and chassis assy (Item 1) to be damaged .
* Use brush and low pressure air tor emove dust on
external plate assy (Item 8) , external fan (Item 5) & heat
exchange CORE opening .
* Please check waterproof foam whether had damaged
before secure external plate assy plate (Item 8) back , if
yes , please remove damaged and stick new waterproof
foam first .
Page 7
HEX120PA Heat Exchanger Instruction Manual
Test
Please power on and follow LED status to check that HEX has
resumed to normal function after maintenance .
6-2. Replacement
Delta HEX is designed with dry contact alarm output and LED
indicator on panel shown below to describe abnormal situation .
Refer to Section 4-1 for checking abnormal part is internal fan ,
external fan or controller for abnormalities .
In cases of parts abnormality , Delta will follow the reading and submit
spare part(s) below for replacement .
Internal fan P/N : KFB2348HHUBDB
External fan P/N : KFB2348HHUA6T
Controller P/N : HEX120PA-000C
User can then refer to maintaince sequence on previous page , or
request Delta authorized support for assistance .
7. MTBF and Reliability
7-1. MTBF
L10 Fan life is expected to be a minimum 80,000 hours continuous
operation at 40°C with 15 ~ 65%RH .@ label rated voltage
7-2. Relibability
Test item Condition
High temperature IEC 60068-2-2
Low temperature IEC 60068-2-1
High temp. / High humidity IEC 60068-2-14 TEST Nb
Temperature cycle IEC 60068-2-3
Vibration ETSI 300 019-1-4 CLASS 4.1
Ingress protection
(External side)
IEC 60529 IP55 (NEMA 3)
GR-487 720hrs salt spray
Package bump IEC 60068-2-29
Page 8
8. Safety
HEX120PA Heat Exchanger Instruction Manual
9. General Safety and Warnings
* Some electronic parts have a high operating temperature .
Use caution at all times.
* Incorrect installation may cause damage and/or injury.
* Installation and maintenance should be performed only by qualified
personnel . Use caution at all times.
* Ensure the grounding wire is connected before powering on the system.
* Ensure the cover and the mounting hardware are secure upon installation.
* All the cables connected to the unit must confirm to UL standards.
Page 9
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