Roof mount
HEX050QA series
Dimension drawing
Features Unit
◆ IP55 waterproof at external side
◆ "One touch" dry run test and dust cleaning
◆ Standalone temperature control W/K (W/℉
◆ Clear LED status indicator
◆ Dry contact alarm output
Design VDC
◆ Air to air heat exchange
◆ Rated voltage at 48V
◆ Reduntant fan quantity design
◆ 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/ (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 ℉)
* Specifications are subject to change without notice.
Main feature
Dimension (W x D x H)
Cooling capacity
Rated voltage 48
Operating current 1.4
Opearting power 68
Operating voltage range
Noise (1.5 meter) 64.0
Weight 9 (20)
*Note
mm
(in)
VDC
A
W
°C
dB-A
Kg (Lb)
Specification
550 x 434 x 155
(22 x 17 x 6)
)
50 (28)
40 ~ 60
HEX050QA 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 ....................................................................... 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 ..................................................................................... 5
6. Maintenance and Replacement .................................................................. 6
6-1. Maintenance ....................................................................................... 6
6-2. Replacement ...................................................................................... 7
7. MTBF and Reliability ................................................................................... 7
7-1. MTBF................................................................................................... 7
7-2. Relibability ......................................................................................... 7
8. Safety ............................................................................................................ 7
9. Accessory .................................................................................................... 8
9-1. Power cable ........................................................................................ 8
9-2. Function cable ................................................................................... 8
10. General Safety and Warnings ................................................................... 8
HEX050QA Heat Exchanger Instruction Manual
1. Version
Rev.
Description Drawn Approved Issue date
00 Issue spec. Nick Wang Adam Chen 2015/4/28
01 Standardization correction Nick Wang Adam Chen 2016/1/25
02 Add section 10 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 (W x D x H)
Cooling Capacity (*Note 1)
Rated Voltage VDC 48
Rated Current (*Note 2) A 4.0
Operating Voltage Range VDC 40 - 60
Operating Current A 1.4
Operating Power Consumption W 68
Acoustic Noise at 1.5M (SPL) dB-A 64.0 dB-A
Weight Kg (Lb) 9 (20)
Main feature Unit
mm
(in)
W/K (W/℉)
Model Number
HEX050QA
550 x 434 x 155
(20 x 17 x 6)
160 (89)
* 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
HEX050QA 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 : Aluminum sheet t=1.5mm
(2) Finish : Power pain , Color RAL7032
(3) Dimensional tolerance : ± 1mm [0.04”]
Page 2
3-2 . Mounting panel cutout
：
HEX050QA Heat Exchanger Instruction Manual
4. Electrical specification
4-1. Connection and LED indicator (on HEX panel)
Power Connection COMM connection
User can follow dry contact definition that is Normal Open (N.O.) to
detect abnormal status from pin 1 & pin 2
Definition N. O
Connection Pin 1 & Pin 2
Control board, NTC and fan are in
normal status
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
CLOSE
Dry contact max. rating : 75VDC/50mA
Page 3
HEX050QA Heat Exchanger Instruction Manual
LED indicator
INNER FAN / OUTER FAN / STATUS LEDs indicate fan and NTC
sensor status .
Depress "TEST" button to start auto-test of outer and inner fans
running from low to high speed. Turn off by depressing the “TEST” button
again .
INNER FAN
Normal GREEN
Failed* RED
Normal
Blinking
OUTER FAN STATUS
GREEN
RED
GREEN
RED
Blinking
N/A
(touch TEST / CLEAN)
Failed*
GREEN
Blinking
GREEN
Blanking
N/A
(touch TEST / CLEAN)
RED
RED
* FAN failed : Fan speed is lower than 50% of definition or fan is locked
* STATUS Failed : NTC resistance is over range such as “open circuit” or
“short circuit”
4-2. Standalone control mode
HEX can detect ambient temperature to control cooling capacity ,
both internal fan and external fan speed default setting are shown as below
Cooling capacity (W/K) vs. Temperature
Page 4
HEX050QA Heat Exchanger Instruction Manual
Inner fan speed vs. Temperature Outer fan speed vs. Temperature
5. Mechanical feature
5-1 . Thermal path and Airflow baffle
With forced convection using the axial 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 right .
5-2 . Configuration
Item Q'ty
Description
1 1 Chassis assy
2 1 Heat exchange CORE
3 1 Controller
4 1 Internal fan plate assy
5 1 External fan plate assy
Page 5
6. Maintenance and Replacement
Be sure to SHUT DOWN the power before proceeding with any
maintenance or component replacement .
6-1. Maintenance
Monthly
Use brush and low pressure air to blow out the dust or any debris
on both internal/external air inlet and air outlet opening .
Quarterly
Follow below maintenance sequence
Internal loop maintenance :
HEX050QA Heat Exchanger Instruction Manual
* The maintenance is from internal side .
* Use screw driver to remove secured screw to disassemble
the internal fan plate assy (Item 4) from bottom of chassis assy
(item 1) , and disconnect internal fan from controller
(Item ) , Note the connection location .
* Use brush and low pressure air to remove dust on internal fan
plate assy (Item 4) , internal fan & heat exchange core air
intake opening at internal side .
* Connect fan to controller (Item 3) and re-attach internal plate
assy (Item 4) with chassis assy (Item 1) .
External loop maintenance :
* Due to the maintenance have to damage the waterproof
foam on the bottom of HEX , Delta propose to return to
factory for maintenance or request Delta authorized support
for assistance if customer find external airflow loop has
obstruction to drop cooling capacity .
Test
Power on and depreess “TEST” button on panel to proceed with
auto test . Follow LED status to check that HEX has resumed to normal
function after maintenance .
Page 6
HEX050QA Heat Exchanger Instruction Manual
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 : AFB1548EH-BJ51
External fan P/N : AFB1548VH-DH2L
Controller P/N : HEX050QA-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
IEC 60529 IP55 (NEMA 3)
(External side)
GR-487 720hrs salt spray
Package bump IEC 60068-2-29
8. Safety
Page 7
9. Accessory
9-1. Power cable
9-2. Function cable
HEX050QA Heat Exchanger Instruction Manual
10. 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 8
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