Climate RENTAL SOLUTIONS PA 28 User manual

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INSTRUCTION MANUAL
PA 28 AND PA 45 PACKAGED UNIT

INSTRUCTION MANUAL PA 28 AND PA 45 PACKAGED UNIT
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TABLE OF CONTENTS
FOREWORD ...........................................................................................................3
INTRODUCTION.....................................................................................................3
EQUIPMENT INSTALLATION ................................................................................4
OPERATION CONSIDERATIONS ..........................................................................6
MAINTENANCE CONSIDERATIONS.....................................................................7
ELECTRIC OPERATION ........................................................................................7
FAILURE INPUT AND PROTECTION ALARMING..............................................12
MAINTENANCE....................................................................................................13
COMMUNICATION PROTOCOL ..........................................................................13

INSTRUCTION MANUAL PA 28 AND PA 45 PACKAGED UNIT
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FOREWORD
Thank you for choosing us. Please read the manual carefully before you install and use our products. We preserve
the rights to change the contents of this manual. We shall not be responsible for the loss and failure caused in the
process of installation due to not conforming to this manual.
INTRODUCTION
Rooftop Packaged Unit series include 12 optional models. Everyone has been through wide market research and
long time actual operation in system, structure and control, ensuring that every model can be designed on the basis
of best price.
The series of units are applied in the industrial and commercial elds such as hotel, supermarkets, authorized dealing
shop, o󰀩ce building and factory workshop. They perfectly connect many characteristic of large-sized central a/c,
such as convenience, comfort, high-grade and the simplicity and exibility of split units. The new design makes use
of the space module, the features of small-sized commercial modern building space, making the cool and heat air
spread into every room averagely to form “Zero” temperature di󰀨erence. Besides, outdoor fresh air can be absorbed.
The air path can connect with indoor ornament which is completely hidden and doesn’t occupy any space. It has
become a new generation of products of central a/c and traditional commercial a/c.
CHARACTERISTIC AND MERITS
1. Various products and wide application
The series of Rooftop packaged units include many di󰀨erent specications which can completely meet the
demand of home and commercial places’ requirement and o󰀨er you a comfortable and pleasant environment.
2. Complete air system, simple and hygiene, less components, easy maintenance
The exible and concise design makes the maintenance very simple. Disassembling several bolts from any side
of the unit can repair any part of the unit.
3. Intelligent controller
Microcomputer intelligent controller can reach four control modes : cooling, dehumidifying, andventilation. It also
has the functions of timing on-o󰀨 and failure display.
4. Excellent performance
World well-known brand of main parts are used. To guarantee the rational match of the unit, strict performance
testing is done. Besides the unit runs steady and the vibration and noise are e󰀨ectively controlled by the use of
multi-vane pitch centrifugal fan, world-known high e󰀩ciency compressor and the elaborative-designed controller,
motor, etc.
5. Quiet operation and convenient maintenance
Reach the lowest noise of the a/c room. The a/c units are placed far from the a/c area which meets the demand
of indoor low noise to the greatest degree. The adoption of high e󰀩ciency and low noise centrifugal fan makes
the quiet operation come true.

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EQUIPMENT INSTALLATION
INSTALLATION NOTICE
The equipment installation must be completed by professionals. Installation by non-professional sta󰀨 may lead to
improper operation, even failure. Take necessary protection to the unit when moving the units. It is not allowed to
make forcible operation to damage the units.
UNIT INSTALLATION
1. The installation location should make the hot air through condenser not to be absorbed back to the unit or absorb
hot air which comes from another unit. Besides, enough space should be kept for unit maintenance.
2. Barrier should not exist to block the air discharge and air suction in the passage of air discharge and air suction
of the units.
3. There should be good ventilation at the location of unit installation so as to take away the heat air blown from the
unit and bring in the air at a lower temperature.
4. The unit should be installed on a base which is rm and at, 50~100mm higher than the plane. Enough strength
should be kept to support the weight of the unit and the vibration when running.
5. The unit should be installed horizontally to decrease the vibration, lower the noise and make the condensing
water discharge smooth. The condensing water discharge vent of the unit must have water seal whose height
should be more than 50mm.
6. Keep the installation away from the dirty or oily place so as not to block the heat ex-changer.
7. Following space is suggested during installation.
No. 18 21 28 36 50 62 72 88 105 140 175 210
A500 1200 1200 1600 1600 2000 2000 2500 2500 2500 2500 2500
B 500 500 500 500 500 800 800 1200 1200 1200 1200 1200
C500 2000 2000 2000 2000 2000 2000 2500 2500 2500 2500 2500
D 300 1200 1200 1600 1600 2000 2000 2500 2500 2500 2500 2500

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DUCT INSTALLATION
1. Usually two air supply ducts: Rectangle air duct and circular one.
2. Rectangle air duct can connect the air supply inlet of the indoor unit by exible connection.
3. For circular duct, add a transition duct to the air inlet of indoor unit, and be connected separately to air di󰀨user,
(referring to the drawing),the air inlet velocity of air di󰀨user should be the same to meet the requirement.
4. Suggest using silencer box in the air supply duct of the heavy airow unit to lower noise.
5. If adopting fresh air, the fresh air entrance is better to choose the place where the air is clean and there is no
pollution. As for the outdoor air entrance, rain-proof shutter and lter should be installed and at the fresh air
section, air ow adjuster should be installed. It is suitable when the fresh air quantity makes up 10% of the total
air quantity.
Model Name
1 Main pipe
2Branch pipe
3 Air supply pipe
AIR DUCT HEAT PRESERVATION
Air supply and air return pipes should both have heat preservation. First of all, stick the nail on the air duct and then
attach the cotton preservation with tin foil paper. Fasten it with nails and seal the connection with tin foil adhesive
tape.
Model Name
1Galvanized plate
2 Nail
3 Cotton preservation
4 Tin foil
5 Nail cover
6 Adhesive tape
Remarks:
• Every air supply pipe and return air pipe should have iron bracket fastened on the oor prefabricated board. The
air duct connector should be sealed tight by adhesive tape.
• It is recommended that the air return margin should keep the wall 150mm far.
ELECTRIC APPLIANCE INSTALLATION
1. The power supply capacity must meet the a/c requirement. The voltage at the side of the power supply incoming
line inside the a/c unit should remain within +10% rating and the power supply frequency is within 2%.
2. Cut the power supply at electric wire connection. Forbidden to operate with electricity.
3. To protect the sta󰀨 and avoid the danger of electric shock caused by leakage, the unit body should have good
and reliable grounding protection setting to prevent the electric shock accident. It also needs check the ground-
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INSTRUCTION MANUAL PA 28 AND PA 45 PACKAGED UNIT
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ing line very often to guarantee a good grounding(grounding resistance should not exceed 4 ohm)
4. The layout of power supply routing must conform to the national standard and the unit body must have good
grounding to avoid the danger caused by insulation failure. The indoor suspending routing adopts electric spe-
cialized PVC conduit tube and PVC connection wire box with cover (not use recycling material connection wire
box) Wiring conduit should at and erect and be xed. Threading pipe should not use right angle elbow plumbing,
but use proper siphon spring bend. The radius of the syphon should be more than four times as long as the di-
ameter of the conduit. Drape should not occur after bending the threading pipe. Lay the connection box properly
so as to easy maintenance and wire changeover.
5. The communication wire (Temp. Probe connection wire) and the power supply source should be laid separately
to prevent interruption.
OPERATION AND COMMISSIONING
1. Inspection before operation Read the wiring diagram and make sure that wiring and communication wiring are
correct and meet requirements. Make sure that the unit has ground wire protection.
2. First Time Operation
After a complete inspection of the whole system, a trial operation can be conducted.
• Connect the power and watch the thermostat. If the wiring controller does not display “search the power”, the unit
cannot start until wiring controller displays normally.
• Listen carefully if there is any strange sound of the unit, or if the compressor or fan operates normally. Disconnect
power to check the unit if there is strange sound.
• Examine the temperature of each room to see if the temperature changes are normal. Modify the air valves of
duct of each room to meet airow volume requirement of each room. Set the work condition and then examine
it to meet the requirement.
• Keep trial operating for some time (about 3 days).
OPERATION CONSIDERATIONS
INSPECTION BEFORE OPERATION
1. Read the wiring diagram and nameplate, make sure that wiring and power are correct and meet requirements,
otherwise not operate.
2. Inspect the connection of wires are enough rm. Make sure that the unit has good ground wire protection.
3. The power supply capacity must meet the a/c requirement. The voltage at the side of the power supply incoming
line inside the a/c unit should remain within +10% rating and the power supply frequency is within 2%.
4. Make sure that the 3 phase of main power supply is correct. Cut the power supply at electric wire connection.
Forbidden to operate with electricity.
5. Make sure that the setting data of controller are correct.
6. Not operate or cut any valves arbitrarily.
7. The communication wire (Temp. Probe connection wire) and the power supply source should be laid separately
to prevent interruption
8. The installation location should be clean, dry and make the hot air through condenser not to be absorbed back
to the unit or absorb hot air which comes from another unit. Besides, enough space should be kept for unit main-
tenance.
9. The unit should be installed horizontally to decrease the vibration, lower the noise and make the condensing
water discharge smooth. The condensing water discharge vent of the unit must have water seal whose height
should be more than 50mm.
10. Check the lter and make sure it is not blocked.

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FIRST TIME OPERATION
After a complete inspection of the whole system, a trial operation can be conducted.
1. Connect the power and watch the thermostat. If the wiring controller does not display, the unit cannot start until
wiring controller displays normally.
2. Listen carefully if there is any strange sound of the unit, or if the compressor or fan operates normally. Disconnect
power to check the unit if there is strange sound.
3. Examine the temperature of each room to see if the temperature changes are normal. Modify the air valves of
duct of each room to meet airow volume requirement of each room. Set the work condition and then examine
it to meet the requirement.
4. Keep trial operating for some time (about three days).
MAINTENANCE CONSIDERATIONS
1. The on-o󰀨 of the unit per hour should not exceed four times, otherwise the service life of the unit will decrease.
2. The surroundings of the units should keep clean and tidy. Clean the leaves and rubbish absorbed by the n on
time.
3. Clean the air return lter once three months to guarantee the quality of the air.
4. Check if the condensing water pipe is smooth regularly. Make sure the drainage is clear.
5. Not allowed to reset the unit by force without any reason of the trouble if something is wrong with the unit. Con-
tact the agent or the technician.
6. All diameters have been setup at the ex-work of the units. If the customer needs to adjust the diameter, please
contact the agent and the technician. It is not allowed to adjust the diameter automatically.
ELECTRIC OPERATION
OPERATION INSTRUCTION
1. Interface introduction

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2. Symbol introduction.
Symbol Meaning Symbol Meaning
Supply air mode Power on
Cooling Time
Heating Failure warning
3. Button introduction
Symbol Meaning Specication
HOME
1. At checking or setting interface, press it and back to main interface;
2. When setting parameter, press it and cancel setting;
3. Press it for long time and display the info of the main version;
UP
1. In main interface, press it and increase the setting temp, quickly increase
the setting parameter by pressing it for long time;
2. Any interface, if “▲” display, press it and enter last page;
3. In parameter setting, press is and increase the parameter, quickly increase
the parameter by pressing It for long time;
DOWN
1. In main interface, press it and decrease the setting temp, quickly decrease
the parameter by pressing it for long time;
2. Any interface, if “0” display, press it and enter next page;
3. In parameter setting, press it and decrease the parameter, quickly decrease
the parameter by pressing it for long time;
ENT
1. In main interface, press it to reset the failure have removed;
2. When setting parameter, press it conrm the setting and turn to next
parameter setting;
3. In main interface press “ENT”“SET” for long time and enter password
interface, input the passwords and enter factory setting interface;
4. In factory parameter setting interface, press it and enter relevant setting
interface;
SET
1. In main interface, press it and enter user setting interface;
2. In setting interface, press it and enter setting status; if no parameter need to
be set, no action.
3. In main interface, press “ENT”“SET” for long time and enter password
interface, input the passwords and enter factory setting interface;
4. In factory parameter setting interface, press it and enter relevant setting
interface;
ALARM 1. In main interface, press it and enter failure checking interface;
POWER 1. Any interface, press it to power on/o󰀨 unit;

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2. Display NAV map

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3. Electrify display
The welcome page will display for 10 sec, it display the unit information and the version of the display, press any
key to cancel and enter main interface.
4. Main interface
Turn to main interface after electrify for 10 sec, as below picture:
*The rst line show the working status: is Supply air, is Cooling, is Heating, means unit is working,
is Failure;
*The second line is temperature;
*The third line show the time and setting temp, press “ ” “ ” can adjust the setting parameter at this interface,
press “ ” conrm the adjustment. If no, press “ ” and waiting for 5 sec, system will conrm the setting.
5. Power on/o󰀨
In main interface, press “ ” enter operating status, top right corner display “ ”, mode symbol display on top
line; when unit is working, in main interface press “ ” to shut o󰀨 the unit, “ ” disappear.
6. User parameter setting
In main interface press “ ” enter “Main Menu” interface, press “ ” enter setting status, press “ ” enter the
relevant interface, if press “ ”, no action and turn to next function interface, “Main Menu” is as below:
In setting status, press “ ” to adjust the value, press “ ”,“ ” to turn the page; for value setting, press “ ”,“ ”
to change the value, user can quickly change the value by press “ ”,“ ” for long time. Press “ ” after setting.

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Conrm the adjustment. After nish all of the setting, press “ ” back to Main interface. User setting is as below:
Item Value Unit Default Remark
Temp set 5.0~50.0 ºC 25.0 Set the temperature
Self-start when
electrify O󰀨/On -- O󰀨 Self-start when electrify
Force defrost O󰀨/On -- O󰀨 Not consider the time interval, force enter the defrost
Contrast set 20~50 -- 32 Set the contrast
Time set -- -- -- Set the time
Timing set -- -- -- --
Language Chinese -- Chinese --
7. Check the input and output
In“Main Menu” interface, user can enter the relevant interface to check the ambient status, device status and
failure protection status as below:
When the status checking, press “ ” back to last menu, press “ ” for long time back to main interface.
8. Time set
In“User setting”interface, enter “Time set” interface; The rst line show the time, press “ ” move the cursor,
press “ ” “ ” to change the value.
9. Timing set
In “User setting” interface, enter “Timing set” interface. Press “ ” enter setting interface, press “ ” to select the
timing date and timing on/o󰀨, press “ ” “ ” to change the value; press “ ” to select the setting parameter: Date
→ Timing on, hour set → Timing on, minute set → Timing o󰀨, hour set → Timing o󰀨, minute set; when set the
power on date, the date will icker, press “ ” to active the date, press “ ” to cancel setting; when set the time,
press “ ” “ ” to adjust the value; press “ ” to conrm the setting, press “ ” back to last menu.
If the time set is 00:00, it means not activate the timing function.

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10. Failure cascading
Input point of failure cascading, in order to detect external alarm signal, such as re and so on.
FAILURE INPUT AND PROTECTION ALARMING
FAILURE LIST
All ports are normally closed according system set, if the port makes a loop with COM(Public port) of the relevant
socket, it means ok; or it means failure. If you need to shield this switch input fault, only need to short of jumpers of
the corresponding failure ports. System will display the error code when error happen. (*means the parameter can
be set).
Failure Condition Delay Duration Corresponding
action Reset Remark
Supply fan error
Blower overload Any time 0 sec 2 sec Shut o󰀨 unit Manual
If error exist before unit turn on,
fail to turn on, alarm alarming
and display error;
HP protection Any time 0 sec 2 sec Shut o󰀨 corresponding
comp Manual
If error exist before unit turn on,
fail to start comp, alarming and
display error;
LP protection When comp
start *120 sec 2 sec Shut o󰀨 corresponding comp Manual Delay check after comp turn on, alarming and display error;
Condenser Fan
overload Any time 0 sec 2 sec Shut o󰀨 all comp Manual
If error exist before unit turn on,
fail to start comp, alarming and
display error;
Supply T.High When system
start 0 sec 2 sec Shut o󰀨 all E-heater Auto
Check when heating, if temp
di󰀨 between inlet and outlet is
3ºC, reset
Supply T.low When system
start 0 sec 2 sec Shut o󰀨 all comp Auto
Check when cooling, if temp
di󰀨 between inlet and outlet is
3ºC, reset, comp restart 10 min
delay.
Insu󰀨 heat When start
heating 0 sec 10 min Shut o󰀨 unit Auto / Manual
Check when heating,keep the
set temp of supply air for 10
min, protect turn o󰀨, reset if
temp di󰀨 between inlet and
outlet, or manual recovery.
Return T. sensor Any time 0 sec 2 sec Shut o󰀨 unit Auto After reset
Supply T. sensor Any time 0 sec 2 sec Alarming Auto No action
Ambient T.
sensor Any time 0 sec 2 sec Alarming Auto
If error happen, not considering
temp di󰀨 when defrost, not
considering start logic when
heating;
Fin sensor Any time 0 sec 2 sec
Alarming, condenser
fan turn to compressor
link control
Auto

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FAILURE CHECKING
The failure will display automatically when failure happen. User can check the unreset error info by pressing “ ” in
main interface.
RESET FAILURE
1. Press “ ” to reset the failures when the unit is working;
2. All of the failure can be reset by power o󰀨.
Before reset the failure, pls conrm the external failure is removed. Or failure can’t be reset.
MAINTENANCE
1. The on-o󰀨 of the unit per hour should not exceed four times, otherwise the service life of the unit will decrease.
2. The surroundings of the units should keep clean and tidy. Clean the leaves and rubbish absorbed by the n on
time.
3. Clean the air return lter once three months to guarantee the quality of the air.
4. Check if the condensing water pipe is smooth regularly. Make sure the drainage is clear.
5. Not allowed to reset the unit by force without any reason of the trouble if something is wrong with the unit. Con-
tact the agent or the technician.
6. All diameters have been setup at the ex-work of the units. If the customer needs to adjust the diameter, please
contact the agent and the technician. It is not allowed to adjust the diameter automatically.
COMMUNICATION PROTOCOL
BASIC PARAMETER
Communication band rate: 9600
Data bits: 8
Stop bits: 1
Check bit: None
Temperature and humidity deal value: Real value 10:1
Relay output: 0=OFF 1=ON
Failure input: 1=Failure 0=Normal
Figure input: 1=Abnormal 0=Normal
NO&NC 0=NC 1=NO
Default ID is “1”
Communication protocol: MODBUS-RTU
INSTRUCTIONS OF 485 SERIAL PORTS EXPANSION COMMUNICATION
Overview
This serial ports expansion board is specically designed for our company. Usually it can only be used with our
control panel. Through it, a 485 serial port can be expanded into two 485 serial ports, realizing a serial port’s board
connects two communicators or a monitor and a communicator simultaneously, etc.

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Wiring connection
D16: serial port 1 indicator, ashing when communicating;
D17: serial port 2 indicator, ashing when communicating;
D18: serial port 3 indicator, ashing when communicating;
12V GND of serial port 1 is power supply of control panel, with anti-reverse function;
12V GND of serial port 2 and 3 are output of 12V GND of serial port 1, with anti-reverse function.
Wiring principle
Serial port 1 connects with control panel and address is xed at 1;
Serial port 3 connects with screen and address is xed at 1; via serial port 3, set network address of serial port 2;
Serial port 2 connects with monitor.
Network address setting
1. DIP setting
When network address is set at 1 -15, network address can be set via DIP of control panel.
Network address DIP1 DIP2 DIP3 DIP4
1 ON OFF OFF OFF
2 OFF ON OFF OFF
3 ON ON OFF OFF
4 OFF OFF ON OFF
5 ON OFF ON OFF
6 OFF ON ON OFF
7 ON ON ON OFF
8 OFF OFF OFF OFF
9 ON OFF OFF ON
10 OFF ON OFF ON
11 ON ON OFF ON
12 OFF OFF ON ON
13 ON OFF ON ON
14 OFF ON ON ON
15 ON ON ON ON

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2. Software setting
SL485 serial port expansion board can also set network address of serial port 2 through software. At this point,
all DIP must be in the “OFF” state. Its wiring connection is as follows :
Electrify SL485 serial port expansion board and double-click “ ” icon to open address setting software, as
shown below:
If the computer’s serial port number is not COM1, set it to the corresponding port number; ll network address
number you want to set in the address bar and press the “Setting” button; if the indicator ashes once (red), it
means the address is set successfully.
After nishing the setting, you can also push “Read” button to read its current network address.

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Note:
1. The whole network system can connect 32 SL485 serial port expansion boards as most.
2. Setting address via software will be valid when all DIP are in the OFF state;
3. It’s band rate is 9600.