Nortek Global HVAC, LLC Multi Variable Heat Pump Duct Type Indoor Unit

Nortek Global HVAC, LLC  Multi Variable Heat Pump Duct Type Indoor Unit
Nortek Global HVAC, LLC
Multi Variable Heat Pump
Duct Type Indoor Unit
Owner's Manual
Heat Pump
Models:
BDDL-2.2(07)SAK
BDDL-2.8(09)SAK
BDDL-3.6(12)SAK
BDDL-4.1(14)SAK
BDDL-5.6(18)SAK
BDDL-6.3(22)SAK
„ Please read this owner’s manual carefully before operation and retain it for future reference
„ Specifications & illustrations subject to change without notice or incurring obligations.
Preface
For correct installation and operation, please read all instructions carefully. Before reading the
instructions, please be aware of the following items:
WARNING
DANGER: Failure to comply may result in severe personal injury, property
damage and/or death
CAUTION
CAUTION: Failure to comply may result in personal injury and/or property
damage
NOTICE is used to address practices not related to personal injury.
WARNING
˄1˅Instructions for installation and use of this product are provided by the manufacturer.
˄2˅Installation must be performed in accordance with the requirements of NEC and CEC by authorized
personnel only.
˄3˅For the safe operation of this unit, please read and follow the instructions carefully.
˄4˅During operation, total capacity of indoor units should not exceed the total capacity of outdoor units,
otherwise, poor cooling or heating performance may result.
˄5˅Direct operators or maintainers should keep this manual for future reference.
˄6˅If this unit fails to operate normally, please contact a qualified conractor as soon as possible and provide
the following information:
1) Content on the nameplate(model number,cooling capacity, serial number and manufacture date.
2) Malfunction details(before and after the malfunction occured.
˄7˅Each unit has been strictly tested and proved before shipment. In order to prevent units from being
damaged or malfunctioing because of improper service, please do not disassemble the unit by yourself. If
you need to maintenance or service, please contact a qualified contractor.
˄8˅All graphics in this manual are for reference only. Manuals are subject to change by manufacturer without
prior notice.
User Notice
z This appliance is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge. Children
should not be allowed to play on or near this appliance..
z DISPOSAL: Do not dispose this product as unsorted household waste. Please dispose
y
or recycle responsibly.
Contents
1 Safety Precautions .................................................................................................................. 1
2 Product Introduction ................................................................................................................ 2
2.1 Names of Key Components ............................................................................................. 2
2.2 Rated Working Condition ................................................................................................. 3
2.3 Unit Functions .................................................................................................................. 3
3 Installation Preparations ......................................................................................................... 4
3.1 Standard Fittings .............................................................................................................. 4
3.2 Selecting a Location for Installation ................................................................................. 5
3.3 Requirements for Communication Line............................................................................ 5
3.4 Electric Installation ........................................................................................................... 7
4 Installation Instructions............................................................................................................ 8
4.1 Installation of Indoor Unit ................................................................................................. 8
4.2 Refrigerant Pipe Connection .......................................................................................... 10
4.3 Drainage Pipe Installation and Drainage System Testing ............................................. 10
4.4 Installation of Air Duct .................................................................................................... 13
4.5 Installation of Wired Controller ....................................................................................... 15
5 Wiring Work ........................................................................................................................... 15
5.1 Connection of Wire and Patch Board Terminal ............................................................. 16
5.2 Power Cord Connection ................................................................................................. 16
5.3 Connection of Communication Wire between Indoor Unit and Outdoor Unit(or indoor unit)
.................................................................................................................................................... 17
5.4 Connect Communication Wire of Wired Controller ........................................................ 17
5.5 Connection of Wired Controller and Indoor Units Network ............................................ 18
6 Routine Maintenance ............................................................................................................ 20
6.1 Cleaning of Filter ............................................................................................................ 20
6.2 Preseason Maintenance ................................................................................................ 20
6.3 Post-Seasonal Maintenance .......................................................................................... 20
7 Table of Error Codes for Indoor Unit..................................................................................... 20
8 Troubleshooting .................................................................................................................... 21
Multi Variable Heat Pump Duct Type Indoor Unit
1 Safety Precautions
WARNING
(1) Follow this instruction to complete the installation work. Please read this manual carefully before unit
startup and service.
(2) Wire size of power cord should be large enough.The damaged power cord and connection wire should be
replaced by exclusive cable.
(3) ) After connecting the power cord, please affix the electric box cover properly.
(4) Never fail to comply with the nitrogen charge requirements.Charge nitrogen when welding pipes.
(5) Never short-circuit or cancel the pressure switch to prevent unit damage.
(6) Connect the wired controller before energization; otherwise wired controller could be damaged.
(7) Before using the unit, please check if the piping and wiring are correct to avoid water leakage, refrigerant
leakage, electric shock, or fire etc.
(8) Do not insert fingers or objects into air outlet/inlet grille.
(9) Open the door and window and keep good ventilation in the room to avoid oxygen deficit when the gas/oil
heating equipment is used.
(10) Never start up or shut off the air conditioner by plugging or unplugging the power cord.
(11) Let the unit run for at least five minutes after startup; otherwise it will affect oil return of the compressor.
(12) Do not allow children operate this unit.
(13) Do not operate this unit with wet hands.
(14) Turn off the unit or cut off the power supply before cleaning, otherwise electric shock or injury may occur.
(15) Never spray or flush water towards unit, otherwise malfunction or electric shock may occur.
(16) Do not expose the unit to the wet or corrosive conditions.
(17) Under cooling mode, please don't set the room temperature too low. Keep the temperature difference
between indoor and outdoor unit within 5°C (9°F).
(18) User is not allowed to repair the unit. Fault service may cause electric shock or fire. Please contact a
qualified service technician for help.
(19) Before installation, please check if the power supply matches the requirements specified on the nameplate.
(20) Installation should be conducted by dealer or qualified personnel. Please do not attempt to install the unit
yourself. Faulty installation may result in water leakage, electric shock, fire etc.
1
Multi Variable Heat Pump Duct Type Indoor Unit
(21) Be sure to use the appropriate accessories and parts to prevent the water leakage, electric shock and fire.
(22) Make sure the unit can be grounded properly and securely to avoid electric shock. Please do not connect the
ground wire to gas pipe, water pipe, lightning rod or telephone line.
(23) Connect power to the unit 8 hours before operation. Do not cut off the power when it will not be used for a
short period of time, i.e. overnight (to protect the compressor).
(24) If refrigerant leakage occurs during installation, please ventilate immediately. Toxic gas will resuslt if the
refrigerant gas meets spark or open flame.
(25) Volatile liquid, such as paint thinner or gasoline will damage the unit appearance.Only use soft cloth with a
little mild detergent to clean the outer casing of unit.
(26) If anything abnormal occurs (such as burning smell), please power off the unit and cut off the main power
supply, and then immediately contact a licensed contractor. If the problem persists, the unit might be
damaged and lead to electric shock or fire.
Manufacturer will not assume responsibility for any personal injury or property loss caused by
improper installation, improper debugging, unnecessary repair, or not following the instructions of
this manual.
2 Product Introduction
2.1 Names of Key Components
No.
ķ
ĸ
Ĺ
Name
Air Outlet
Air-return Opening
Drain Pipe
2
Multi Variable Heat Pump Duct Type Indoor Unit
2.2 Rated Working Condition
Indoor Side Condition
Outdoor Side Condition
Dry Bulb Tempഒ (°F)
Wet Bulb Tempഒ (°F)
Dry Bulb Tempഒ (°F)
Wet Bulb
Tempഒ (°F)
Rated Cooling
27(80.6)
19(66.2)
35(95)
24(75.2)
Rated Heating
20(68.0)
15(59.0)
7(44.6)
6(42.8)
Indoor Unit Working Temperature Range:16~32°C(60.8~89.6 °F).
2.3 Unit Functions
Unit Functions
Wired Controller
WRC1(Standard)
Remote Controller
RC(Optional)
Operation Mode (Cooling, Heating,
Fan, Dehumidifying)
Fan Speed Adjustment
Temperature Adjustment
X-fan Function
Quiet Function
Sleep Function
Save Function
E-heater Function
Memory Function
Absence Function
Timer Function
Low Temp Dehumidify Function
Filter Cleaning Reminder Function
I Feel
Light Function
Swing
Note!
ķ √: included, X: not included
ĸ Please refer to the user manual of Wired Controller or Remote Controller for more
details.
3
Multi Variable Heat Pump Duct Type Indoor Unit
3 Installation Preparations
Note!
Illustrations are for reference only. Please refer to actual products. Unspecified
measure unit is mm/inch.
3.1 Standard Fittings
Please use the supplied standard fittings listed below as instructed.
No.
Name
Illustration
Q'ty
Usage
1
Wired Controller
1
To control the indoor unit
2
M4X25 Screw
(Cross recessed small pan
head screw)
3
To mount the wired controller
3
Drain Hose Assembly
1
To connect with the hard
PVC drain pipe
4
Special Nut
1
To be used for connecting
the refrigerant pipe
5
M10X8 Nut with Washer
4
To be used with the hanger
bolt for installing the unit.
6
M10 Nut (M10X8.4 Nut)
4
To be used with the hanger
bolt for installing the unit.
7
M10 Washer (Spring Washer
M10X2.6)
4
To be used with the hanger
bolt for installing the unit.
8
Insulation
1
To insulate the gas pipe
9
Insulation
1
To insulate the liquid pipe
10
Sponge
2
To insulate the drain pipe
11
Fastener
8
To fasten the sponge
12
paper pattern for installation
(cardboard template)
1
Locate the drill hole on
ceiling
4
Multi Variable Heat Pump Duct Type Indoor Unit
3.2 Selecting a Location for Installation
˄1˅The appliance shall not be installed in the laundry.
˄2˅The supporting structure to be used must have a sufficient load carrying capacity to
support the weight of the unit.
˄3˅Drain pipe can drain water out easily.
˄4˅There is no obstacle at inlet or outlet that might impede good air circulation.
˄5˅There should be sufficient space around the unit for maintenance access. Please see
diagram below.
˄6˅Keep the unit away from heat source, inflammable gas, and smoke.
˄7˅This is a concealed ceiling type unit.
˄8˅Indoor unit, outdoor unit, power cord and electric wire should stay at least 1m (36 inch)
from the TV set and radio. Electrical appliances may cause electromagnetic
interference. (Strong electromagnetic interference will require clearances more than
1m (36 in.)
Unit: mm/inch
Fig 3.2
˄1˅ The unit shall be installed in accordance with national standards and local regulations.
˄2˅ Only qualified personnel can perform installation. Please contact local dealer before installation..
˄3˅ Make sure all the installation work completed before energizing.
3.3 Requirements for Communication Line
Note:
If the unit is installed in or near a strong electromagnetic field, shielded wire
must be used for the communication wire between indoor unit and controller. Twisted
pair line with shielding function must be used on the communication wire between
indoor units and indoor unit(s) to outdoor unit.
3.3.1 Select communication line for indoor unit and wired controller
5
Multi Variable Heat Pump Duct Type Indoor Unit
Fig 3.3.1
Wire type
Light/normal PVC
hose
Total length of
communication wire
between indoor unit and
wired controller (m/feet)
L≤250(850)
Wire diameter
(AWG)
2×18~2×16
Wire standard
Remark
IEC
60227-5:2007
1. Total length of
communication cable can't
exceed 250m (850feet).
2. The cord shall be
Circular cord (the cords
shall be twisted together).
3. If unit is installed in or
near a strong
electromagnetic field use
shielded wire.
3.3.2 Select communication line for indoor unit and outdoor unit
Fig 3.3.2
Wire type
Light/Ordinary
polyvinyl chloride
sheathed cord.
(60227 IEC 52
/60227 IEC 53)
Total length of
communication wire
between indoor unit
and indoor
unit(outdoor unit)
(m/feet)
L≤1000(3280)
Wire diameter
(AWG)
≥2×18
6
Wire
standard
Remark
1. If the wire diameter is enlarged
to 18AWG, the total
communication cable length can
reach 1500m (4920 feet).
IIEC
2. The cord shall be Circular cord
60227-5:20
(the cords shall be twisted
07
together).
3.If unit is installed inor near
strong electromagnetic field , use
shielded wire.
Multi Variable Heat Pump Duct Type Indoor Unit
3.4 Electric Installation
Model
MCA(A)
MOP(A)
BDDL-2.2(07)SAK
0.25
0.45
BDDL-2.8(09)SAK
0.25
0.45
0.38
0.68
0.38
0.68
BDDL-5.6(18)SAK
0.63
1.13
BDDL-6.3(22)SAK
0.63
1.13
BDDL-3.6(12)SAK
BDDL-4.1(14)SAK
Power Supply
208~230V-1ph-60Hz
(1) Use copper wire only as unit’s power cord. Operating temperature should be within its
rated value.
(2) If the power cord is more than 15m (49feet) long, proportionally increase the sectional
area of power cord to avoid overload.
(3) Above selection requirements: Power cord size is based on BV single-core wire (2~4pc)
at 40°C (104°F) ambient temperature when laying across plastic pipe. Air switch is D type
and used at 40°C (104°F). If actual installation condition varies, please lower the capacity
according to the specifications of power cord and air switch provided by manufacturer.
(4) Install cut-off device near the unit. The minimum distance between each stage of cut-off
device should be 3mm (1/8 inch)(The same for both indoor unit and outdoor unit).
7
Multi Variable Heat Pump Duct Type Indoor Unit
4 Installation Instructions
Note!
This series duct type unit is only for one room.
4.1 Installation of Indoor Unit
4.1.1 Dimensions
Equip with an inspection hatch after lifting the unit. For the convenience of maintenance, the
service port should be on one side of the electric box and below unit’s lower level.
Below are the outline dimension applicable to indoor units of
BDDL-2.2(07)SAK~BDDL-6.3(22)SAK.
Fig 4.1.1
Unit: mm/inch
Below are dimensions of A, B, C, etc. for different models:
Model
A
B
C
D
E
F
G
H
I
742
(29-1/4)
491
(19-3/8)
700
(27-1/2)
615
(24-1/4)
200
(7-7/8)
121
(4-3/4)
528
(20-3/4)
161
(6-3/8)
580
(22-7/8)
942
(37-1/8)
491
(19-3/8)
900
(39-3/8)
615
(24-1/4)
200
(7-7/8)
121
(4-3/4)
728
(28-5/8)
161
(6-3/8)
780
(30-3/4)
1142
(45)
491
(19-3/8)
1100
(43-1/4)
615
(24-1/4)
200
(7-7/8)
121
(4-3/4)
928
(36-1/2)
161
(6-3/8)
980
(38-5/8)
BDDL-2.2(07)SAK
BDDL-2.8(09)SAK
BDDL-3.6(12)SAK
BDDL-4.1(14)SAK
BDDL-5.6(18)SAK
BDDL-6.3(22)SAK
4.1.2 Suspend the indoor unit.2 Suspend the indoor unit
˄1˅Drill bolt holes and install bolts
1) Attach the cardboard template on the installation position. Drill 4 holes according to the
cardboard as shown in Fig. 4.1.3. The diameter of hole should match the diameter
8
Multi Variable Heat Pump Duct Type Indoor Unit
of expansion bolt and the depth is 60-70mm (2-3/8~2-3/4 inch), as shown in Fig
4.1.4.
Fig 4.1.3
Fig 4.1.4
2) Insert the M10 expansion bolt into the hole and drive the nail into the bolt, as shown
in Fig4.1.5.
Note:
The length of bolt depends on the installation height of the unit. Bolts are field supplied.
Fig 4.1.5
˄2˅Install the indoor unit temporarily
Assemble suspension bolt on the expansion bolt. Attach the hanger bracket to the
suspension bolt. Be sure to secure it by using a nut and washer on upper and lower sides of
the hanger bracket. The washer plate will prevent the washer from falling.
˄3˅Using the cardbord templat.
Refer to cardboard template for ceiling opening dimension. The center of ceiling opening
is indicated. Mount the template to the unit with 4 screws and secure the corners of the
waterspout at the drainage pipe with screws.
˄4˅Adjust the unit to the right position.
˄5˅Make sure the unit is level
The indoor unit is equipped with a built-in water pump and float switch. Verify the unit is
level.
Fig 4.1.6
9
Multi Variable Heat Pump Duct Type Indoor Unit
˄6˅Remove the washer locating plate and then tighten the nut on it.
˄7˅Remove the cardboard template.
Fig 4.1.7
4.2 Refrigerant Pipe Connection
˄1˅Align the flaring port of copper pipe to the center of screwed joint and then tighten
the flaring nut by hand as shown in Fig. 4.2.
˄2˅Tighten the flaring nut with torque wrench.
Fig.4.2
˄3˅Use pipe bender when bending the pipe to avoid too small of an angle.
˄4˅Wrap the connection pipe and joint with sponge and then secure it with tape.
4.3 Drainage Pipe Installation and Drainage System Testing
4.3.1 Notice for Installation of Drain Pipe
˄1˅The drainage pipe should be as short as possible.The downward slope should be
at least 1%~2% in order to drain condensate water smoothly.
˄2˅The diameter of drainage hose should be larger than or equal to the diameter of
drainage pipe joint.
˄3˅Install drainage pipe according to the following Fig. and apply insulation to the
drainage pipe. Improper installation may lead to water leakage
˄4˅Normal hard PVC pipe can be used as the drainage pipe. During connection, insert
the end of PVC pipe into the drainage hole and then tighten it with drainage hole
and wire binder. Do not connect the drainage pipe and drainage hole with glue.
10
Multi Variable Heat Pump Duct Type Indoor Unit
˄5˅When a drainage pipelines are used for several units, the position of pipeline
should be about 100mm (4 inch) lower than the drainage port of each unit. In this
case, thicker pipes should be applied.
Fig 4.3.1
4.3.2 Drainage pipe installation
˄1˅Insert the drain hose into the drain hole and tighten it with tape, as shown in Fig
4.3.2.
˄2˅Tighten the pipe clamp, with the distance between screw nut and hose smaller than
4mm(1/8inch).
ķ metal clamp(accessory)
ĸ drain hose(accessory)
˄3˅Use sealing plate to insulate the pipe clamp and hose, as shown in Fig.4.3.3.
ķ metal clamp(accessory)
ĸ thermal sponge(accessory)
˄4˅When connecting several drain pipes, follow the instruction as shown in Fig 4.3.4.
Choose the drain collecting
g pipe that matches unit capacity.
y
Fig 4.3.4
˄5˅Install the trap as shown in Fig 4.3.5.
˄6˅Install one trap for each unit.
˄7˅Sufficient clearance should be maintained for access to trap for service and
cleaning.
11
Multi Variable Heat Pump Duct Type Indoor Unit
Fig 4.3.5
˄8˅The horizontal pipe can be connected to vertical pipe in the same level. Select the
connection way as shown in following.
Fig. 4.3.6: Connection of drainage pipe joints
Fig. 4.3.7: Connection of downspout elbow
Fig. 4.3.8: Inserting pipe connection
Fig 4.3.6
Fig 4.3.7
Fig4.3.8
˄9˅The installation height of raising pipe for drainage should be lower than 850mm
(34inch). The downwardslope of raising pipe should be at least 1%~2%. If the
raising pipe is vertical with the unit, the raising height should be less than 800mm
(32inch).
Fig 4.3.9
(10) Drain pipes should have a downward slope of at least 1%~2%. To prevent pipes from
sagging, install hanger bracket at intervals of 1000~1500mm (39~59 inch).
Fig 4.3.10
4.3.3 Test of Drainage System
˄1˅After the electrical installation is finished, perform test of the drainage system.
˄2˅During the test, check that water flows correctly through the pipeline and that
there’s no water leakage at the junction.
˄3˅If this unit is installed inr a new building, we suggest you perform the test before
installing the ceiling.
12
Multi Variable Heat Pump Duct Type Indoor Unit
4.4 Installation of Air Duct
Note:
˄1˅There should be insulating layer on air-out duct, air-return duct and fresh air duct to
avoid heat loss and moisture. Attach a nail on the air duct and then add thermal
sponge with a layer of tin. Fasten it with a nail cover and then seal the junction with
tin tape.You can use other materials that have good insulation value.
˄2˅Each air-out duct and air-return duct should be secured on a pre-made board with
iron frame. The junction of air duct should be sealed well in order to prevent air
leakage.
˄3˅The design and construction of air duct should comply with national requirements.
˄4˅Manufacturer suggests the air-return duct to be more than 150mm (6 inch) away
from the wall. Add a filter to the air-return opening.
˄5˅Please consider noise and vibration dampening for the design and construction of
air duct. For quieter conditions air duct openings should be installed in areas away
from living or working spaces. For example, do not install an air return directly
above a desk or sitting area.
4.4.1 Installation of Air-out Duct
˄1˅Installation of the Rectangular Duct
Fig 4.4.1
No.
1
2
3
4
Name
Hanger Rod
Return Air Duct
Canvas Duct
Return Air Inlet
No.
5
6
7
8
˄2˅Installation of Circular Duct
Fig 4.4.2
13
Name
Static Pressure Box
Filter Screen
Main Supply Air Duct
Supply Air Outlet
Multi Variable Heat Pump Duct Type Indoor Unit
No.
1
2
3
4
5
Name
Return Air Duct
Canvas Duct
Return Air Inlet
Hanger Rod
Supply Air Outlet
No.
6
7
8
9
Name
Transition Pipe
Supply Air Duct
Diffuser
Diffuser Connector
4.4.2 Shape and Size of Air Outlet and Air-return Opening
˄1˅Range of Capacity BDDL-2.2(07)SAK~BDDL-6.3(22)SAK.
Fig 4.4.3 Air Outlet
Fig 4.4.4
Model
BDDL-2.2(07)SAK
BDDL-2.8(09)SAK
BDDL-3.6(12)SAK
BDDL-4.1(14)SAK
BDDL-5.6(18)SAK
BDDL-6.3(22)SAK
Air-return Opening
Size of Air Outlet
Size of Air-return Opening
A(mm/inch)
B(mm/inch)
C(mm/inch)
D(mm/inch)
121(4-3/4)
528(20-3/4)
580(22-7/8)
161(6-3/8)
121(4-3/4)
728(28-5/8)
780(30-3/4)
161(6-3/8)
121(4-3/4)
928(36-1/2)
980(38-5/8)
161(6-3/8)
4.4.3 Installation of the Return Air Duct
˄1˅The default installation location of the rectangular flange is at the back and the
return air cover plate is at the bottom, as shown in Fig 4.4.7.
Fig 4.4.7
(2) If bottom return air is desired, just switch the rectangular flange and the return air
cover plate.
14
Multi Variable Heat Pump Duct Type Indoor Unit
(3) Connect one end of the return air duct to the return air outlet with rivets and the other
to the return air louver. For the sake of the convenience to freely adjust the height,
use a canvas duct, which can be reinforced and folded with 8# iron wire.
(4) More noise is likely to be produced in the bottom return air mode than the rear return
air mode. A static pressure box will minimize the noise.
(5) The installation method can be configured to match the requiremens of the building
g 4.4.8.
and maintenance etc., as shown in Fig.
Fig 4.4.8
Table 5 Installation of the return air duct
No.
Name
No.
Name
1
Return Air Inlet (with filter)
4
Indoor unit
2
Canvas Duct
5
Supply Air Duct
3
Return Air Duct
6
Grille
4.5 Installation of Wired Controller
Please refer to User Manual of Wired Controller for the installation details.
NOTICE! When installation is finished, the unit must be tested and debugged before
operation. Please refer to Instruction Manual of ODU for auto addressing and
debugging details.
5 Wiring Work
WARNING
Before accessing access terminals, all supply circuits must be disconnected.
˄1˅ Units must be grounded securely, or it may cause electric shock.
˄2˅ Please carefully read the wiring diagram . Faulty wiring could cause malfunction or
damage the unit.
˄3˅ The unit should have dedicated power supply.
˄4˅ The wiring should be in accordance with related regulations.
˄5˅ Install circuit breaker for branch circuit according to related regulations and electrical
standards.
15
Multi Variable Heat Pump Duct Type Indoor Unit
˄6˅ Keep cable away from refrigerant pipings, compressor and fan motor.
˄7˅ The communication wires should be separated from power cord and connection wire
between indoor unit and outdoor unit.
˄8˅ Adjust the static pressure with wired controller according to site requirements.
5.1 Connection of Wire and Patch Board Terminal
˄1˅Single wire connection (as shown in Fig. 5.1.1)
1) Strip about 25mm (1 inch) insulation of the wire end with wire stripper.
2) Remove the wiring screws on the terminal board.
3) Shape the tail of wire into ring with needle nose plier. Ring should match the size of
the terminal screw.
4) Use the screwdriver tighten the terminal.
˄2˅Stranded wire connection (as shown in fig 5.1.2)
1) Strip about 10mm(3/8 inch) insulation of the end wire stripper.
2) Remove the wiring screws on terminal board.
3) Insert the wire into the ring tongue terminal and tighten with crimping tool.
4) Use the screwdriver to tighten the terminal.
Fig 5.1.1
Fig 5.1.2
5.2 Power Cord Connection
NOTICE! All indoor units must have dedicated power supply so that they can be
powered ON/OFF at the same time.
Fig 5.2
16
Multi Variable Heat Pump Duct Type Indoor Unit
z For units with single-phase power supply.
˄1˅Detach the electric box lid.
˄2˅Lead the power cord through the wiring holes.
˄3˅Connect the power cord to terminal "L1, L2,
".
˄4˅Secure the power card with wiring clamp.
˄5˅The wire diameter of power cord can’t be less than 18AWG.
5.3 Connection of Communication Wire between Indoor Unit and Outdoor
Unit(or indoor unit)
˄1˅Detach the electric box lid.
˄2˅Lead the Communication cable through the wiring holes.
˄3˅Connect the communication wire to terminal D1 and D2 of indoor 4-bit wiring board,
as shown in Fig. 5.3.1.
Fig 5.3.1
Fig 5.3.2
(4) Secure the communication cable with clamp of electric box.
(5) For more reliable communication, connect the terminal resistor to the most
downstream IDU of the communication bus (terminal D1 and D2), as shown in Fig,
5.3.2, a terminal resistor is provided with each ODU.
5.4 Connect Communication Wire of Wired Controller
˄1˅
˄2˅
˄3˅
˄4˅
˄5˅
Open electric box cover of indoor unit.
Lead the communication wire through the rubber ring.
Connect the communication wire to terminal H1 and H2 of indoor 4-bit wiring board.
Secure the communication wire with wire clip on the electric box.
Wiring instructions of remote receiving light board and wired controller:
1) Fig 5.4.1 shows the installation of wired controller.
17
Multi Variable Heat Pump Duct Type Indoor Unit
Fig 5.4.1
Fig 5.4.2
2) Fig 5.4.2 shows the installation of remote controller.
3) Wired controller and receiving light board can be used on same unit. When
operating through a remote controller, both wired controller and the receiving light
g
g 5.4.3.
board can receive the signals,
as shown in Fig.
Fig 5.4.3
5.5 Connection of Wired Controller and Indoor Units Network
˄1˅ Communication wire of indoor unit to outdoor unit (or indoor unit) is connected to
D1,D2.
˄2˅ Wired controller is connected to H1,H2.
˄3˅ One indoor unit can connect two wired controllers. One must be set as master and one
as slave.
˄4˅ One wired controller can control 16 indoor units maximum at the same time. (as
shown in Fig. 5.5)
˄1˅The indoor units must be the same type if they are controlled by a single wired controller.
˄2˅When the indoor unit is controlled by two wired controllers, the addresses of the two wired
controllers should have different address settings. Address 1 is for main controller. Address 2 is for
slave controller. Detailed setting please refer to the instruction manual of wired controller.
18
Multi Variable Heat Pump Duct Type Indoor Unit
Fig 5.5
19
Multi Variable Heat Pump Duct Type Indoor Unit
6 Routine Maintenance
˄1˅Turn off the unit and cut off the main power supply when cleaning the air
conditioner to avoid electric shock or injury.
˄2˅Use a ladder or other stable platform when cleaning the unit.
˄3˅Do not clean the unit with hot water whose temperature is higher than 45°C
(113°F) to prevent fading or warping.
˄4˅Do not dry the filters over open flame to avoid warping.
˄5˅Clean the filter with a damp cloth with mild detergent.
˄6˅Please contact after a qualified service technician if there is a malfunction.
6.1 Cleaning of Filter
˄1˅Remove the filters from inlet of IDU. Use a vacuum cleaner to remove dust. If the
filters are dirty, wash them with warm water and mild detergent. Dry the filters in the
shade.
˄2˅If the unit is used in a very dusty environment, please clean it more frequently.
(about every two weeks).
6.2 Preseason Maintenance
˄1˅Check if the air inlet and air outlet of indoor and outdoor unit are blocked.
˄2˅Check if securely grounded.
˄3˅Check if all the power cords and communication cables are securely connected.
˄4˅Check if any error code displayed after turning on power.
6.3 Post-Seasonal Maintenance
˄1˅Set the unit in fan mode for half a day on a sunny day to dry the inner parts of unit;
˄2˅When the unit won’t be used for a long period of time, please turn off power supply
to save energy. The characters on the wired controller screen will disappear after
turning off the power supply.
7 Table of Error Codes for Indoor Unit
Error
Code
Content
Error
Code
L0
Indoor Unit Error
L9
L1
Indoor Fan Protection
LA
L2
E-heater Protection
LH
Low Air Quanlity Warning
dA
L3
Water Full Protection
LC
Outdoor-Indoor Incompatibility
Error
dH
L4
Wired Controller Power
Supply Error
d1
Indoor Unit PC-Board Error
dC
Content
Quantity Of Group Control
Indoor Units Setting Error
Indoor Units Incompatibility
Error
20
Error
Code
Content
d8
Water Temperature
Sensor Error
d9
Jumper Cap Error
Indoor Unit
Hardware Address
Error
Wired Controller
PC-Board Error
Capacity DIP
Switch Setting
Error.
Multi Variable Heat Pump Duct Type Indoor Unit
L5
Anti-Frosting
Protection
d3
Ambient Temperature Sensor
Error
dL
L7
No Master Indoor Unit
Error
d4
Inlet Pipe Temperature Sensor
Error
dE
L8
Power Insufficiency
Protection
d6
Outlet Pipe Temperature
Sensor Error
db
Outlet Air
Temperature
Sensor Error
Indoor Unit CO2
Sensor
Error
Special Code:
Field Debugging
Code
8 Troubleshooting
The air conditioner should not be serviced by users. Faulty repair may cause electric
shock or fire, so please contact an authorized service center for professional service. Check
the following before calling for service help.
Phenomenon
The unit won’t start
The unit runs for a short while
then stops.
Troubleshooting
ķ
ĸ
Ĺ
ĺ
Power supply is not connected.
Circuit breaker tripping caused by electrical short.
Input voltage is too low.
Defect of main PC-board.
ķ The inlet or outlet of ODU or IDU are blocked.
Poor cooling effect
ķ
ĸ
Ĺ
ĺ
Ļ
ļ
The filter is dirty.
Too heavy heat load of room(e.g. too many people)
Doors or windows are open.
Inlet or outlet of IDU are blocked.
Thermostat setting temperature is too high.
Refrigerant charge is low (e.g. refrigerant leakage)
Poor heating effect
ķ
ĸ
Ĺ
ĺ
The filter is dirty.
Doors or windows are open.
Thermostat setting temperature is too low.
Refrigerant charge is low (e.g. refrigerant leakage)
Indoor fan doesn’t start
up during heating
ķ At starting, the IDU fan could not operate till the heat exchange
warms ups, to prevent delivery of cool air.
ĸ Unit is defrosting. The IDU fan stopped due to system switch to
cooling mode to prevent delivery of cool air. It will resume
operating after defrosting.
Note:If air conditioner still fails to work normally after checking and handling as described
above, please stop using it immediately and contact local service center for assistance.
21
Specifications & illustrations subject to change without notice
or incurring obligations.
O’Fallon, MO (12/15) © Nortek Global HVAC, LLC 2015.
All Rights Reserved. 551E-1215
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