AC-Series

AC Series
Air Conditioners
Operating and Installation Instructions
Professional Cooling Service
Read this manual carefully before installing. and using this unit. Contents 1. Safety Notes
2. Product Description
2.1.
Technical Specifications
5. Before using for the first time
5.1.
Pre-operational checks
6. Operation
3. Receiving and Unpacking
6.1.
Start-up and Self-Test
4. Installation
6.2.
Operation Mode
6.3.
Digital Display Panel
4.1.
Choosing the installation site
4.2.
Position of the components inside the
enclosure
4.3.
4.4.
Cutting out the enclosure
Semi-embedded – Side or Door Mounting
4.5.
Drainage consideration
4.6.
Electrical installation
4.7.
Protections
4.8.
Door Switch Interlock
7. Setting up parameters
8. Troubleshooting
8.1.
System Error Codes
8.2.
Other Fault Conditions
9. Maintenance
10. Warranty
11. Storage and Disposal
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1 Safety Notes
Read this manual carefully before installing and using this unit.
The installation and commissioning of this unit must only be performed by properly trained personnel who are familiar
with the operation of cooling devices.
Before connecting the unit, ensure that the electrical data on the nameplate matches the main electrical supply.
The AC unit should not be tipped and it’s recommended to keep it in an upright position for at least 1 hour before
attempting to operate it to allow proper lubrication of the compressor.
Air inlets and outlets should not be obstructed inside or outside the cabinet.
When installing the unit on a cabinet door, take into consideration that it could buckle.
Make sure the cabinet is securely attached to its base so that it does not come out of balance when opening the door.
The unit should always be moved or stored in an upright position.
Do not repair or replace any part of the unit or attempt any servicing unless specifically recommended in these
instructions.
Faulty components must only be replaced with genuine spare parts from Huarui.
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2 Product Description
This unit is specifically designed for cooling electronic temperature sensitive equipment in challenging environmental
conditions and is often used in outdoor enclosures in telecom, automation and IT equipment.
The unit has a closed loop cooling circuit, which maintains internal cabinet temperature between 20o to 40oC and keeps
air free of any contaminants from the environment.
Huarui Air Conditioners are designed for continuous duty operation and manufactured with high quality components
to ensure reliability for many years.
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Product Design Features
Digital Led display and keypad controller
RS485 communication port (Modbus-RTU) Modbus protocol
Dry contact alarm output, NO/NC
Available Configuration Software
Low dehumidification cooling function
Optional heating element
Optional hydrogen sensor
Anti-theft design without the cowling
Fit for harsh environment condition (T3), using R134a refrigerant
Internal fan
Controller
Evaporator
Heater
External fan
Compressor
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2.1 Technical Data
The unit label indicates the power rating, installation method and optional accessories.
HRUC A 0＊ ＊ / M / E / A / H＊ ＊
HRUC:
Outdoor enclosure cooling from Huarui
A:
Standard air conditioner
0＊ ＊ :
Cooling Capacity is ＊＊×100W（L35/L35)
M:
Series: M series；
E:
Installation: E: Semi-embedded Mounting
A:
Power: 230VAC 50/60Hz
H＊ ＊ :
Heating Capacity is ＊＊×100W（L35/L35）。(When using optional installed heater)
Remarks：
Installation types for M series: E- Semi-embedded Mounting, D- Door Mounting, and S-Side Mounting;
L and N series are standard NEMA 4 – IP55 and no additional cowling is required.
All data sheets are available in our website at www.itenclosuresystems.com
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3 Receiving and unpacking
The air Conditioner unit is delivered in a wooden case.
Before unpacking, please check that the box is not damaged, deformed, wet or the straps cut.
The box and the unit contain electronic and electric components and it should be handled with care during transport,
storage and manipulation.
Pay attention to the packaging marks
l
Please make sure the air conditioner is always kept in upward position
l
Avoid excessive tilting
l
Protect from moisture, water and rain
l
Recycle when possible the packaging material
l
Do no step on the box or place heavy objects on top
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4 Installation
4.1 Choosing the installation site
When choosing an installation site for the enclosure, please observe the following:
The installation site and the positioning of the cooling unit must be selected in such a way as to ensure good
ventilation, distances between units and distances between the unit and the wall must be at least 500mm (20”).
The Huarui cooling units N & L series are designed for indoor or outdoor use with a NEMA 4 – IP55 protection rating. No
additional cowling is necessary. Do not block airflow to the unit.
The M series could be fitted with cowling (rain hood) by the customer; make sure that inlet air and outlet air are not
obstructed. This is critical to maintain the best cooling efficiency.
The cooling unit must be installed and operated in a vertical position (maximum deviation: 3°).
The site must be free from excessive contamination and moisture, corrosive or inflammable gases.
The ambient temperature must not exceed 55°C and the humidity not higher than 95%
To avoid condensation, make sure all openings in the enclosure are airtight.
The unit is equipped with a drain hole and a nozzle, which could be connected to a hose (not provided).
Make sure the unit has been in an upright position for at least 60 minutes before operation.
4.2 Position of the components inside the enclosure
Do not position the components inside the cabinet too close to the air conditioner outlet in order to maintain an
optimal cooling airflow at all times. Try to arrange the equipment inside the cabinet in order to ensure even air
circulation. Do not direct the cool air directly to a warm air stream coming from an active electric device such a rectifier
or inverter in order to prevent an air short-circuit condition.
Air conditioner inlet and outlet openings should never be obstructed
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4.3 Cutting out the enclosure
•
Using the dimension drawings (see the unit correspondent datasheet), identify the valid lines and dimensions for
your installation type on the door or side of the cabinet.
•
Mark, drill and deburr the holes.
•
Make the cutout. The shadow part of the drawing should be cut off. Deburr the cutouts.
Be careful as sharp edges of cutouts and holes could cause injuries!
Example
Datasheet drilling and cutout
information example
(Refer to the model datasheet for
measurements correspondent to your
unit)
Please notice position of holes
Please notice outer dimensions and
Cutoff section marked as a shadow
Install the unit in the cabinet using M4
screws
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4.4 Semi embedded, Side or door mounting
Follow this instructions for M series fitting
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4.5 Drain consideration
Huarui Air Conditioners are equipped with a drain hole at the outside bottom of the unit.
A nozzle with screws is supplied with the unit.
A hose could be connected to it.
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4.6 Electrical Installation
Prepare the electrical wiring according to the manual
Terminal connector
电源端子二（已安装）
Power Terminal --二（Installed）
电源端子一（可拆卸）
Power Terminal --一（Dismountable）
1 2 3 4 5 6 7 8 9 10
Terminal descriptions.
No.
Symbol
Description
1
L
Live AC Power line
2
N
Neutral line or L2 in 240V 3 phases AC power
3
PE
Ground wire
4
T/R+
Positive pole of 485 Communication
5
T/R-
Negative pole of 485 Communication
6
NO
Normally open dry output contact
7
COM
Common of dry output contact
8
NC
Normally close dry output contact
9 and 10
I/O
Input contact or optional hydrogen sensor
contact
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4.7 Protection
Select a circuit breaker according to the maximum current indicated on the unit nameplate.
4.8 Door Interlock Switch
Terminals 9 and 10 could be connected to a door switch in order to stop the compressor when opening the cabinet,
this is recommended to avoid excessive moisture condensation.
Terminals 9 and 10 could also be used for an optional hydrogen leak sensor circuit supplied by Huarui.
5 Before using for the first time
5.1 Pre-operational checks
After the Air Conditioner is installed and the electrical connection is completed, please check the following:
Table7-1 Pre-operational checks
Serial number
Check items
1
Ensure that all four screws are securely tightened
2
Air inlets and outlets are not obstructed inside and outside the
cabinet and there is space for a good air flow
3
Power line is connected the right polarity
Alarm signal cables are connected correctly
4
Use a multimeter to check that supply voltage is normal and consistent
with the requirements on the nameplate
5
The unit has been in an upright position for at least 1 hour
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6 Operation
6.1 Start-up and Self-test
Once the air conditioner is running, if there is abnormal noise or vibration, please cut off power immediately and
contact Huarui technical support.
Once power is applied, the unit will initiate a self-test procedure for the first 30 seconds: internal fan operation,
temperature sensor, heater will be checked.
6.2 Operation mode
After the self-test the air conditioner will operate in: standby, cooling, heating or alarm
•
Standby mode:
The Huarui air conditioner is equipped with a temperature sensor, which constantly monitors and compares the
inside cabinet temperature with the default set point, which is 35o C. When the temperature inside the cabinet is
lower than the set point the compressor doesn’t run, the unit is in stand-by mode. Only the internal fan will run
and the display will show the inside enclosure temperature.
•
Cooling mode:
When the inside cabinet temperature is ≥ the set temperature, the compressor starts and the unit is in cooling
mode. The external fan also runs and the display shows
symbol
symbol, the compressor runs for 60 seconds, and the
is bright.
When the cabinet temperature is ≤ the set temperature minus the compressor hysteresis (default value 5o), and
the compressor uptime ≥ minimum running time (default 5 minutes), the systems stops cooling. At this point the
compressor turns off and the external fan will stop after a few seconds. The
external fan stops, the
•
symbol is off and when the
symbol is off.
Heating mode*:
If the cabinet inside temperature is ≤ heater start temperature set point (0oC), the heater switches on and the
symbol is bright.
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When the cabinet temperature is ≥ heater set point (0oC), plus heater stop hysteresis temperature (5 oC), the
heater stops and the
symbol turns off.
*If the unit is equipped with heater option
•
Alarm mode
In case of alarm, the display shows alternately the temperature and the alarm code. Go to troubleshooting section
for more information.
6.3 Digital Display Panel
Figure 4-1 the display panel diagram
Table 4-1 the meanings of lights on the display panel
LED
Description
Flashing during self test or setting mode
Light on when cooling
Light on when heating
Light on when external fan is running
Flashing when alarm is present
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7 Setting up parameters
To enter the programming mode press and hold the “M” key for 5 seconds, then scroll up or down with the "!"" keys
to select the parameter code, select a code and press “set” to read the parameter value, to set a new value use the
"!"" keys and press “set” again to retain the new value. Pressing “set” again will display the current state. At any
moment the “M” key could be depressed to exit the programming mode.
Some parameters are password protected; please contact customer service to obtain one.
Table 4-2 Setting Codes
Code
Parameter name
Default Value
Range
F01
Compressor start temperature
35
20～50oC
F02
Compressor stop hysteresis
temperature
5
2～8 oC
F03
Heater start temperature
0
-5～10 oC
F04
Heater stop hysteresis temperature
5
1～5 oC
F05
High temperature alarm
55
35～70 oC
F06
Low temperature alarm
-5
-15～15 oC
F07
Communication address
1
1～255
Remarks
This function is
only applicable
to models with
heater option
installed.
Address of the
unit in the
Modbus network
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8 Troubleshooting
Under normal operation, the display shows the internal air temperature. In case of alarm, the display shows alternately
the temperature and the alarm code as follows:
8.1 System error codes Table 4-3 Alarm Code
Code
number
E01
Code Name
Internal temperature
sensor fault
Description of fault
Return air temperature sensor
is short circuit or open circuit
Procedure
1- Use a multimeter to check
whether the return air
temperature sensor is short circuit
or open circuit.
2 - Check whether the return air
temperature sensor is loose.
E02
Evaporator
temperature sensor
alarm
Evaporator temperature sensor
is short circuit or open circuit
Check whether the evaporator
temperature sensor is short circuit
or open circuit.
E03
Condenser
temperature sensor
alarm
Condenser temperature sensor
is short circuit or open circuit
Check whether the condenser
temperature sensor is short circuit
or open circuit.
1- The internal fan is not
working properly.
1- Check Whether the internal fan
cables are loose.
2 - The evaporator temperature
has been below zero for more
than 15 minutes.
2- Check whether there is a
system refrigerant leak.
E04
Internal fan alarm
1- The external fan is not
working properly
E05
External fan alarm
2 -The condenser temperature
has been above 77oC for more
than15 minutes.
1- Check Whether the external fan
line is loose.
2 - Check whether there is a
system refrigerant leak.
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1- Lack of refrigerant
E06
Refrigerant leakage
alarm
2 - The evaporator temperature
sensor is loose.
1- Check whether there is a
system refrigerant leak.
2 - Check whether the evaporator
temperature sensor is loose.
E07
Low temperature
alarm
The cabinet temperature is
below the set value
The heater is running until the
alarm is cleared.
E08
High temperature
alarm
The cabinet temperature is
higher than the set value.
Open the cabinet door until the
alarm is cleared.
8.2 Other Fault Conditions
Table8-4 other fault analysis and processing
Fault state
Possible causes
Solutions
Power on the
switch, the cabinet
temperature is too
high but the air
conditioner is not
working.
1- Power failure or no power.
The air conditioner
is running but the
cooling effect is not
good.
1 - The cooling capacity of the air
conditioner is not match with the load.
1 - To add or choose another air
conditioner according to the load.
2 - The ambience temperature is too high.
2 - Ensure the machine is used in the
correct range.
2 - The cooling set temperature is higher
than the cabinet temperature.
3 - System fault.
1 - Check the power supply and the
electric circuit.
2 - Set cooling temperature
according to the needs.
3 - Please contact customer service
3 - Other system fault.
3 - Please contact customer service
The machine is 1-The cabinet temperature greater than or
stopping suddenly, equal to the cooling set temperature.
and the electric
2 - Other system fault.
system is normal.
1-Setting
cooling
temperature
according to the needs.
2 - Please contact customer service
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9 Maintenance
Warning: Disconnect all electrical connections before any kind of maintenance. The unit is maintenance free; however, the components in contact with the outside air should be cleaned periodically.
Depending on environmental conditions of the installation site, Huarui suggests the following verification points every
six months.
No.
Check items
Check methods
Procedure
1- Turn off the supply power
1
Cable
connections
2 - Pull gently the power line and other cables
to check if any wires or terminal screws are
loose.
Tighten the screws.
2
Voltage
Stability
Use the multimeter to check if input voltage
is within normal.
If the voltage is not within the
normal range, Please turn off
the power supply
immediately.
3
Mechanical
check
Use screwdriver to tighten the screws and
verify the AC unit is solidly attached to the
cabinet
Tighten the screws.
4
Sealing
It's important to seal the space between the
air conditioner unit and the cabinet to
prevent cool air from escaping and reduce
the chance of hot outside air seeping into the
cabinet.
Check for leaks around the edges between
the unit and the cabinet.
5
Fans
Verify the fans, inlet and outlets for signs of
dirt accumulation or other debris
Be sure to caulk the gap
between the unit and the
cabinet to seal the space
around it and reduce the
chance of leaks.
Fans could be cleaned with
compressed air and/or a
vacuum cleaner
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10 Warranty
Warranty Coverage and disclaimer
Huarui warrants the Air Conditioner unit to be free of any manufacturing or workmanship defects for twelve (12)
months from product up-running time or for a maximum of eighteen (18) months from the date of delivery. The
warranty does not cover damage to Huarui units caused by erroneous application, inappropriate maintenance,
abnormal environmental conditions, modifications or service done without authorization from Huarui, intentional
misuse or ordinary wear.
Huarui will repair or replace any unit that does not meet this warranty. The replacement or repair of the defective unit is
the exclusive remedy; liability does not extend to any other damages, incidental, consequential or otherwise. In case of
replacement a refurbished or new unit will be provided.
In order to return a unit please contacts our service department to obtain a Return Authorization Number (RAM).
The unit should be then returned in its original packaging or similar of same quality to our service center freight
prepaid and covered by adequate transport insurance.
11 Storage and disposal
During storage, the cooling unit must stand upright and ambient temperature should not exceed +70oC and relative
humidity should not exceed 95%. Keep away from corrosive gases and dust.
This AC unit contains refrigerant gas and at the end of the working life, the product must not be disposed of as urban
waste; it must be taken to a special local authority differentiated waste collection center or to a dealer providing this
service.
Suzhou Huarui Thermal Control Technology Co.,Ltd
IT Enclosure Systems
BuildingA2 ，No.2, Tian’e’dang Rd. Wuzhong Dis.
Suzhou China
8 Abri Du Bois, Chelsea, QC, J9B-1S7
http://www.huaruicooling.com
Tel: +86 512 66570332 - Fax:：+86 512 68792690
CANADA
http://www.itenclosuresystems.com
Tel: +1-819-866-3020 - Fax:：+1-819-483-1630
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