NORTEK GLOBAL HVAC, LLC V5 HR Heat Recovery Cooling and

NORTEK GLOBAL HVAC, LLC  V5 HR Heat Recovery Cooling and
NORTEK GLOBAL HVAC, LLC
V5 HR Heat Recovery Cooling and
Heating Mode Exchanger
Owner's Manual
Heat Recovery
Models:
V5BV-R1K
V5BV-R4K
V5BV-R8K
z Please read this owner’s manual carefully before operation and retain it for future reference
z Specifications & illustrations subject to change without notice or incurring obligations
Preface
For correct installation and operation, please read this manual carefully. Before reading the
manual, please note that:
(1) The design standard of multi VRF system conforms to national standard.
(2) To ensure safety when operating this system, please strictly follow the instructions in this
manual.
(3) The total capacity of running indoor units must not exceed that of the outdoor units.
(4) Make sure that this manual is kept for future reference.
(5) In case of malfunction, please check the following items and contact a qualified service
technician as soon as possible.
1˅ Air conditioner’s nameplate (model, cooling capacity, product code, ship date)
2˅ Malfunction status (detail description of conditions before and after malfunction occurs)
(6) All units have been strictly tested and proved to be qualified before shipment. To avoid
damage or operation failure which may be caused by improper service, please contact a
qualified technician for service or maintenance.
(7) All graphics and information in this manual are only for reference. Manufacturer reserves
the right for changes in terms of sales or production at any time and without prior notice.
(8) Under standby status, the unit will use a little power when not running for normal
communication and preheating of refrigerant. If the unit won’t be used for an extend period
of time, turn off the power of the complete unit. However, the compressor will require
preheating the next time it is used
Children are not allowed to play on or near this equipment
Correct Disposal of this product: This marking indicates that this product
should not be disposed with other household wastes. To prevent possible harm to
the environment or human health from uncontrolled waste disposal, recycle it
responsibly.
Contents
1 Safety Precautions ............................................................................................................................. 1
2 Product Introduction ......................................................................................................................... 2
2.1 Names of Main Parts ........................................................................................................................... 2
2.2 Parameter table˖ ................................................................................................................................ 3
3 Preparation before installation ......................................................................................................... 3
3.1 Standard Accessory ............................................................................................................................. 3
3.2 Installation Site...................................................................................................................................... 4
3.3 Selection Requirement for Communication Wire ............................................................................ 4
3.4 Wiring Requirement ............................................................................................................................. 6
4 Installation Instruction ...................................................................................................................... 6
4.1 Installation of Cooling and Heating Mode Exchanger..................................................................... 6
4.1.1 Dimension of Outdoor Unit and Mounting Hole Position ......................................................................... 6
4.1.2 Bolt Installation ............................................................................................................................................... 9
4.1.3 Hang unit ....................................................................................................................................................... 10
4.1.4 Horizontal alignment .................................................................................................................................... 11
4.2 Pipe Connection ................................................................................................................................. 12
4.2.1 Precautions for the Installation of Connection Pipe ................................................................................ 12
4.2.2 Selection of Y-type branch .......................................................................................................................... 13
4.2.3 Thermal insulation for pipeline ................................................................................................................... 14
4.2.4 Support and protection of pipeline ............................................................................................................ 14
4.2.5 Connection of indoor unit ............................................................................................................................ 15
4.2.6 Branch selection of indoor unit of mode exchanger (“C1”) .................................................................... 17
4.2.7 Piping size between mode exchanger and downstream indoor unit (“k”) ........................................... 17
4.3 Drainage Hose Installation and Test................................................................................................ 17
4.3.1 Precautions ................................................................................................................................................... 17
4.3.2 Installation of Drainage Hose ..................................................................................................................... 18
5 Cable Connection ............................................................................................................................ 20
5.1 Wiring Board Connection .................................................................................................................. 21
Attach the terminal to the board. ............................................................................................................ 21
5.2 Connect Power Cord.......................................................................................................................... 22
5.3 Connect Communication Wire of Indoor Unit and Outdoor Unit ................................................. 23
6 Routine Maintenance ...................................................................................................................... 25
6.1 Preseason Checklist .......................................................................................................................... 25
6.2 Post Seasonal Maintenance ............................................................................................................. 25
7 Troubleshooting .............................................................................................................................. 26
V5 HR Heat Recovery Cooling and Heating Mode Exchanger
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 sufficient to handle voltage. A damaged power cord and connection
wire should be replaced by appropriate size cable.
(3)
After connecting the power cord, please secure the electric box cover properly in order to avoid accident.
(4)
Never fail to comply with the nitrogen charge requirements. Charge nitrogen when welding pipes.
(5)
Never short circiut or cancel the pressure switch to prevent unit damage.
(6)
Connect the wired controller before energization, otherwise wired controller cannot be used.
(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 supplied heating equipment is used.
(10) Never start up or shut off the air conditioner by directly plugging or unplugging the power cord.
(11) Turn off the unit after it runs at least five minutes; otherwise it may damage 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 humid or corrosive conditions.
(17) Under cooling mode, please don't set the room temperature too low and keep the temperature difference
between indoor and outdoor unit within 5嘙C (41嘙F).
(18) User is not allowed to repair the unit. Faulty 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 requirements specified on the nameplate. \
(20) Installation should be conducted by dealer or qualified personnel. Please do not attempt to install the
unit by yourself. Improper handling may result in water leakage, electric shock or fire etc .
(21) Be sure to use the aproved accessories and parts to prevent the water leakage, electric shock and fire.
(22) Make sure the unit can be grounded properly and 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 if the unit 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 result if the
refrigerant gas contacts 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 happens (such as burning smell), please power off the unit and cut off the m ain
power supply, and then immediately contact a qualified service technician. If unit continues to run, it
might be damaged and lead to electric shock or fire.
Manufacturer will not assume responsibility for any personal injury or property loss caused by
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
improper installation, improper test running, unnecessary repair,or not following the instructions of this
manual.
2 Product Introduction
2.1 Names of Main Parts
One-to-one Cooling and Heating Mode Exchanger
One-to-more Cooling and Heating Mode Exchanger
No.
ķ
ĸ
Ĺ
Name
Connection pipe of
outdoor unit
Drainage pipe
Connection pipe of
indoor unit
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
2.2 Parameter table˖
Model
Unit
NCHS1B(U)
NCHS4B(U)
NCHS8B(U)
Rated voltage
V
208-230V
208-230V
208-230V
Max. quantity of connecting indoor
unit
-
8
32
64
Max. branch quantity of
connecting indoor unit
-
1
4
8
Max. quantity of connecting indoor
unit for each branch
-
8
8
8
Max. total capacity of connecting
indoor unit for each branch
kW(kBtu/h)
14(47.77)
14(47.77)
14(47.77)
Total capacity of connecting
indoor unit for mode convertor
kW(kBtu/h)
14(47.77)
45(153.55)
68(232.03)
Size of high pressure gas pipe
(mode convertor connects outdoor
unit)
mm(inch)
16(5/8)
22(7/8)
22(7/8)
Size of low pressure gas pipe
(mode convertor connects outdoor
unit)
mm(inch)
22(7/8)
28(1-1/8)
28(1-1/8)
Size of liquid pipe (mode
convertor connects outdoor unit)
mm(inch)
9.52(3/8)
12(1/2)
16(5/8)
Size of liquid pipe (mode
convertor connects indoor unit)
mm(inch)
16(5/8)
16(5/8)
16(5/8)
Size of gas pipe (mode convertor
connects indoor unit)
mm(inch)
9.52(3/8)
9.52(3/8)
9.52(3/8)
3 Preparation before installation
Cautionʽ
ʽ
The product photos are only for reference. The unit for size is mm, except otherwise stated.
3.1 Standard Accessory
Please use below provided standard parts according to requirement.
No.
Name
1
Photo
Q’ty
Purpose
M10X8
Nut with washer M10X8
4
Used for hanging indoor unit
2
Nut M10
(hexagon nut M10X8.4)
4
Used for hanging indoor unit
3
Washer 10
(spring washer M10X2.6)
4
Used for hanging indoor unit
4
High-tenperature fastener
8
Wrap sponges at the
connection position
5
Installation template
1
Use for drilling holes at the
ceiling
6
M4X12
(green bonding screw M4X12)
1
use for connecting the
earthing cord
/
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
The packed attachments should be subject to actual objects. If there are any alterations, there will
be no further notice.
3.2 Installation Site
(1) Make sure the hanging parts can hold the weight of unit.
(2) Water can be drained out from the drainage hose conveniently.
(3) No obstacles at outlet and inlets. Keep the air ventilation in good condition.
(4) For indoor unit (as shown in below fig) and the space used for maintenance should be ensured.
(5) Please keep the unit away from those positions where there’s thermal source, inflammable gas
and smog.
(6) The unit is the cassette type (concealed type).
(7) Indoor unit, outdoor unit, power cord and connection cord should be kept 1m (39.37inch) above
away from TV and radio for preventing graphic interference and noise. (Even the distance is 1m
(39.37inch), if there’s strong electric wave, there’s still noise).
Unit˖mm(inch)
Fig. 3.1
Caution:
ķ The installation of the unit must comply with national and local safety regulations.
ĸ Users can’t install the unit, because the installation quality will affect the operation. After
purchasing the unit, please contact with dealer. The unit must be installed and debug ged by
professional installer.
Ĺ The unit can be put through power only after all installation work is finished.
3.3 Selection Requirement for Communication Wire
Caution:
If the unit is installed at the place where there’s strong electromagnetic interference, the
communication wire between indoor unit and wired controller must adopt shield wire, and the
communication wire between indoor unit and indoor unit (outdoor unit) must adopt twisted wire with
shielding function.
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
Communicaton Wire between mode exchanger and indoor unit, outdoor unit:
Fig.3.2
Type of wire
Total length of
communication wire between
indoor unit and another
indoor/outdoor unit: L/m(inch)
Wire size
Remarks
ķ If the wire diameter is enlarged to 2
×AWG16, the total communication
length can reach 1500m
Light/Ordinary
polyvinyl chloride
sheathed cord
(4921-1/4feet).
L≤1000(3280-5/6)
AWG16~AWG18 ĸ The cord shall be Circular cord (the
cores shall be twisted together).
Ĺ If unit is installed in places with intense
magnetic field or strong interference, it
is necessary to use shielded wire.
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
3.4 Wiring Requirement
Model
Power
Fuse Capacity(A)
Minimum Circuit
Ampacity(A)
Maximum
Overcurrent
Protection(A)
V5BV-R1K
208-230V 1Ph 60Hz
15
10
15
V5BV-R4K
208-230V 1Ph 60Hz
15
10
15
V5BV-R8K
208-230V 1Ph 60Hz
15
10
15
Caution:
ķ Above circuit breaker and power cord specification are selected according to the max power
(max current).
ĸ Specification of power cord is based on the working condition where ambient temperatu re is
40°C (104°FeF) and multi-core copper cable (working temperature is 90eC ˄194eF˅, e.g.
power cable with YJV cross-linked copper, insulated PE and PVC sheath) is lying on the
surface of slot. If working condition changes, please adjust the specification according to
national standard.
Ĺ Specification of circuit breaker is based on the working condition where ambient temperature
of circuit breaker is 40eC (104eF). If working condition changes, please adjust the
specification according to national standard.
ĺ When installing the cut-off device next to the unit, the min space between every two levels of
cut-off device should be 3mm (1/8inch) (for indoor unit and outdoor unit).
4 Installation Instruction
4.1 Installation of Cooling and Heating Mode Exchanger
4.1.1 Dimension of Outdoor Unit and Mounting Hole Position
When installing the unit, include a maintenance port (access opening) should be reserved at the
electric box side of unit for maintenance. The position of maintenance port should be lower than the
lower side of unit.
The mode exchanger shall be installed near the maintenance port or air return of indoor unit. (Note:
if it is installed near the air return, please make sure it will not affect air return or indoor unit maintenance
access).
The following pictures illustrate the installation of maintenance port and mode exchanger:
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
Fig. 4.1
Fig. 4.2
Fig. 4.3
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
If space restrictions require, include a separate maintenance port for mode exchanger.
Fig. 4.4
Unit outline dimension˖mm (inch)
V5BV-R1Koutline and installation dimension
Fig. 4.5
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
V5BV-R4Koutline and installation dimension
Fig. 4.6
V5BV-R8Koutline and installation dimension
Fig. 4.7
4.1.2 Bolt Installation
(1) Attach the installation template at the installation position. Drill 4 holes at the installation position
basing on the installation template as shown in Fig. 4.8. Please refer to the diameter of
expansion bolt for the diameter of hole with depth of 60-70mm (2-1/2 – 2-3/4inch). As shown in
Fig. 4.9.
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
Fig. 4.8
Fig. 4.9
(1) Insert M10 expansion bolt into hole, and then set the iron nail into bolt. As
shown in Fig. 4.10.
Caution:
The length of bolt should be selected according to the height of room. Bolt should be purchased by
the installer.
Fig. 4.10
4.1.3 Hang unit
Hang the unit at the bolt on the ceiling of room. Please use special nut for securing the unit.
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
LQFK
I
2:1
≤48mm
I
Fig. 4.11
Caution:
ķ Before operation, please prepare all pipelines (connection pipe, drainage hose) and wires
(connection wire for wired controller, connection wire for indoor unit).
ĸ When drilling holes on ceiling (air return outlet or air outlet), you may need to reinforce the
ceiling to prevent vibration.
Ĺ If the strength of the ceiling is not sufficient for the weight of the unit, please install a beam
bracket, and then put the unit on the beam bracket.
4.1.4 Horizontal alignment
Be sure to install the unit at the proper angle. The unit should be level from front to back. From right
to left the unit should slope at a 1 degree angle for condensate drainage. See Fig. 4.12.
Fig. 4.12
Cautions for Installation
(1) The mode exchanger must be installed by using hanger rod. During installation, the components
must be kept vertically upright according to the indicated direction;
(2) During installation, sufficient clearance should be maintained for service or removal of
components. The pipe should not be jammed between the components.
(3) The distance of the component to the indoor unit along the pipe shall not be more than
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
5000mm (16 feet);
(4) The component must be installed in a straight line to the inlet pipe and branch pipe (See
schematics below):
ME UNIT
Plan view
Branch pipe
Wrong connection
ME UNIT
Branch pipe
Plan view
Branch pipe
ME UNIT
Top view
Right connection
Fig. 4.13
4.2 Pipe Connection
4.2.1 Precautions for the Installation of Connection Pipe
(1) Please comply with the following rules during pipe connection: Connection pipe should be as
short as possible. The height difference between indoor and outdoor units should also be short
as possible. Keep the pipe bends as few as possible and the bend radius as large as possible.
(2) Install the connection pipes by welding. Please strictly follow the requirements for welding
process. Rosin joints, weak joints or pin holes are not allowed.
(3) When laying the pipe, be careful not to distort it. Radius of bending parts must be over 200mm
(8inch). Please do not bend or stretch the pipes frequently, otherwise the pipes will become
brittle. A pipe shall not be bent or stretched for more than 3 times at the same position.
(4) Please use torque wrench to connect the union nut of indoor unit. See below fig.
Fig. 4.14
1) Align the flared outlet of copper pipe with the center of screw, and then tighten the flared nut
by hand.
2) Use torque wrench to tighten the flared nut until you hear it click.
3) Wrap the connection pipe (not insulated) and joint with sponge and then use plastic adhesive
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
tape to secure it.
4) Support the connection pipe with bracket.
5) If the degree of curvature of pipe is too small, the pipe may break. Installer should use pipe
bender to bend the pipe.
6) When connecting pipe to indoor unit, do not forcibly pull on the pipe. Otherwise, capillary or
other pipes of indoor unit may be broken.
4.2.2 Selection of Y-type branch
When connecting an outdoor unit to multiple mode exchanger, the Y-type branch should be used.
(1) Y-type branch
Fig. 4.15
(2) Y-type branch has several pipe sections with different size, which facilitates matching with
various copper pipe sizes. Use pipe cutter to cut in the middle of the section that is the proper
size and remove burrs. See the following figure.
(3) Y-type branch must be installed vertically or horizontally.
Fig. 4.16
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
(4) Branch must be insulated with material that can withstand at least 120eC (248eF). The
attached foam of branch cannot be used as insulating material.
4.2.3 Thermal insulation for pipeline
(1) For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.
(2) At the branch inlet, leave at least 500mm (18 inches) straight pipe section. For FQ04 branch,
leave at least 800mm (32 inches) straight pipe section.
(3) Thermal insulation for pipeline
1) To avoid condensate or water leak on the connection pipe, the gas pipe and liquid pipe must
be wrapped with thermal insulating material and secured by adhesive tape.
2) Thermal insulating material shall be able to withstand the pipe temperature: For heat pump
unit, liquid pipe should withstand at least 70eC (158eF) and gas pipe should withstand at
least 120eC (248eF). For cooling only unit, both liquid pipe and gas pipe should withstand
at least 70eC (158eF). Example: Polyethylene foam (rated to at least 120eC(248eF));
foaming polyethylene (rated to at least 100eC(212eF))
3) Joints of indoor and outdoor unit should be wrapped with insulating material leaving no gap.
See Fig. 4.17.
Fig. 4.17
4) Thermal insulating material of branches should be the same as that of the pipeline. The
attached foam of branches cannot be used as insulating material.
5) When wrapping the tape, each layer should overlap ½ of the width of the previous layer.
Don’t wrap the tape too tightly or the insulation effect will be weakened.
6) After wrapping the pipe, apply sealing material to completely seal the hole in the wall.
4.2.4 Support and protection of pipeline
(1) Support should be made for hanging connection pipe. Distance between each support cannot be
over 1m (39 in.).
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
(2) Precaution should be made against accidental damage of outdoor pipeline. If pipeline exceeds
1m (39 in.), a pinch plate should be added for protection.
Schematic diagram of piping connection˖
4.2.5 Connection of indoor unit
4.2.5.1 Connection for single indoor unit with capacity of less than 14kW (48MBH)
Each branch is to connect to a set of indoor units of the same type. If a branch does not connect to
an indoor unit, make sure that the welding is reliable and will no leak refrigerant.
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
4.2.5.2 Connecting method for indoor unit with capacity of over 14 kW (48MBH)
When connecting to the indoor unit with capacity of over 14 kW (48MBH), do not connect with only
one branch; two branches must be used controlled by the same mainboard for parallel connection.
Parallel connection can be arranged as below: branch 1 and branch 2 are connected in parallel, branch
3 and branch 4 are connected in parallel, branch 5 and branch 6 are connected in parallel, branch 7 and
branch 8 are connected in parallel. No other connection arrangement can be used. Note: after
connection, manually set the SA2 dip switch of corresponding mainboard, and turn off dip switch in first
position.
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
Connecting method is as shown in the picture:
4.2.6 Branch selection of indoor unit of mode exchanger (“C1”)
R410A
refrigerant system
Y-type branch
capacity of downstream indoor
units: X /kW(MBH)
Model
14.0(47.77)˘Xİ28.0(95.54)
FQ01B/A
4.2.7 Piping size between mode exchanger and downstream indoor unit (“k”)
Size of connection pipe between indoor branch and indoor unit should be consistent with the
connection pipe of indoor unit.
Piping between indoor branch and indoor unit Āk”
Rated capacity of indoor units:
c/kW(MBH)
Size of connection pipe between indoor branch and indoor unit
Gas pipe /mm(inch)
Liquid pipe /mm(inch)
14.2(48.45)˘c İ22.4(76.43)
Φ19.05(3/4)
Φ9.52(3/8)
22.4(76.43)˘cİ28.0(95.54)
Φ22.2(7/8)
Φ9.52(3/8)
4.3 Drainage Hose Installation and Test
4.3.1 Precautions
(1) Drainage hose should be as short as possible. The drainage hose should be installed at least at
1%̚2% gradient for draining the condensate water.
(2) The drainage hose must be larger than or equal to the size of drainage piping.
(3) Install the drainage hose according to below figure and apply thermal insulation. Improper
installation may lead to.
(4) Use normal hard PVC pipe for the drainage pipeline. Insert the end part of PVC pipe into the
drainage hole, and then tighten it with drainage hose and tie line. Do not use adhesive glue to
connect drainage hole and drainage hose.
(5) When the pipeline is used for multiple units, the position for the common pipeline should be
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
lower than the drain outlet of every unit 100mm (4 in.). If this is the case, thick pipes should be
use.
Fig. 4.18
Fig. 4.19
4.3.2 Installation of Drainage Hose
(1) Insert the drainage hose into drain outlet and then secure it with adhesive tape.
(2) Tighten the pipe clamp to make the distance between screw cap and hose less than 4mm (3/16
in.).
ķ Metal clip (accessory)
ĸ Drainage hose (accessory)
(3) Apply thermal insulation for Pipe clamp and hose with gasket.˄apply the thermal insulation after
the drainage system test is finished as shown in Fig. 4.20..
Fig. 4.20
ķ Metal clip (accessory)
ĸ Insulating sponge (accessory)
(4) When multiple drainage pipe s are connected together, install as shown in Fig. 4.21.
Fig. 4.21
(5) For the indoor unit with high pressure at the drainage pipe outlet, water trap must be installed.
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
Fig. 4.22
(6) Install the U-trap as shown in Fig. 4.23.
(7) One U-trap should be installed for each unit.
(8) When installing U-trap leave sufficient clearance for cleaning and maintenance
Fig. 4.23
(9)
Horizontal pipe can’t be connected to the vertical pipe. Please see below figure for the
connection method:
Fig. 4.24: Three-way connection of drainage hose joint as shown;
Fig. 4.25: Down elbow connection as shown;
Fig. 4.26: Set into horizontal pipe as shown.
Fig. 4.24
Fig. 4.25
Fig. 4.26
(10) Drainage pipe should kept 1%̚2% gradient downwards. Therefore, install a support
bracket every 1000-1500mm (3-5 ft.).
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
(39.37-59.06inch)
Fig.4.27
5 Cable Connection
Caution:
ķ
Air conditioner must be grounded to prevent damage.
ĸ
Before connecting wires, please check the voltage on the nameplate and then connect wires
according to wiring diagram. Improper wire connection may lead to malfunction or damage to
the air conditioner.
Ĺ
Power capacity should be sufficient and the section area of wires should be 2.5 mm 2
(0.0039inch2) or more.
ĺ
Air conditioner should have dedicated power supply.
Ļ
Wire according to standards and codes to ensure normal operation.
ļ
Install dedicated circuit breaker.
Ľ
All wiring must use pressure terminal or single wire. Do not connect stranded wire to the
wiring board directly.
ľ
Do not let cable contact refrigerant pipe, compressor or fan.
Ŀ
Do not tamper with the internal wiring of air conditioner. Manufacturer will not be responsible
for the damage or malfunction if wiring has been modified.
ŀ
If there’s strong electromagnetic field, use twisted shielding wire. When connecting wires,
please note that the metal shielding layer of twisted pair wire must be grounded (case) to
prevent malfunction due to electromagnetic interference.
䢈Communication wire must be separated from power cord and outdoor/indoor unit connection
wires.
䢉When higher pressure is needed for the project, please adjust it with wired controller. The
appliance shall be installed in accordance with national wiring standards. If the supply cord is
damaged, it must be replaced with an appropriate size cable.
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
5.1 Wiring Board Connection
(1) Connect single wire (as shown in Fig. 5.1).
1) Strip the insulation layer at the end of the single wire about 25mm (1 in.) with wire stripper to
expose the single-core wire.
2) Use screwdriver to remove the terminal screw on wiring terminal board.
3) Bend the end of single wire with.
4) Attach wire to terminal board with screw.
(2) Connect stranded wire (as shown in fig. 5.2).
1) Strip the insulation layer at the end of the stranded wire about 10mm (3/8 in.).
2) Remove the screws on the wiring board of air conditioner with screwdriver.
3) Use crimping tool or pliers to attach round terminal to every strand of wire.
Attach the terminal to the board.
4) Attach the terminal to the board.
Fig. 5.1
Fig. 5.2
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
5.2 Connect Power Cord
Caution: Each mode exchanger in the same system must be supplied power uniformly.
Fig. 5.3
Note: The maximum quantity “n” of indoor unit is determined by the capacity of indoor unit, please
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V5 HR Heat Recovery Cooling and Heating Mode Exchanger
refer to capacity of unit.
(1) Use single-phase power air conditioner
1) Remove electric box cover of indoor unit.
2) Lead the power cord through rubber ring.
3) Connect power cord to ĀL1, L2ā terminal and grounding screw. Please use the green screw to
connect the ground cord. The location is showing in the Fig 5.4
Fig. 5.4
4) Secure the power cord with wire- clamp.
5.3 Connect Communication Wire of Indoor Unit and Outdoor Unit
(1) Open electric box cover of indoor unit.
(2) Lead the communication wire through rubber ring.
(3) Connect communication wire to wiring board OD (D1, D2) of outdoor unit of mode exchanger.
(4) Connect communication wire lead from D1 and D2 terminal of 4-bit wiring board of indoor unit to
wiring board ID1 (1D1, 1D2) of indoor unit of mode exchanger; ID2 (2D1, 2D2ĂĂID-n (nD1,
nD2)ˈnİ8, As shown in Fig. 5.5
23
V5 HR Heat Recovery Cooling and Heating Mode Exchanger
Fig. 5.6
Fig. 5.5
(5) Secure the communication wire with wire clamp.
(6) In order to ensure the reliability of communication between indoor unit and outdoor unit, add a
matched resistance (included in the packing bag) on the wiring board at the last connected mode
exchanger. The matched resistance should be connected among terminal screw D1 and D2.
(7) When mode converter connects to the indoor unit with capacity of over 14kW (48MBH), it only
requires to connect the indoor unit to one of the two corresponding branches. Note that the first
place in the SA2 dip switch for corresponding mainboard of are set to off position.
Fig. 5.7
24
V5 HR Heat Recovery Cooling and Heating Mode Exchanger
6 Routine Maintenance
Caution:
ķ Turn off air conditioner and shut off main power before cleaning.
ĸ Use a ladder or other solid support to reach air conditioner for cleaning.
Ĺ Do not use hot water over 45eC(113eF) to clean the surface of air conditioner. This may
cause discoloration or warping.
ĺ Do not dry the filter over open flame. Otherwise, the filter may catch fire or be warped.
Ļ Volatile liquid, such as paint thinner or gasoline, may damage the air conditioner. (Only use
soft dry cloth or damp cloth dipped with mild detergent to clean the filter of air conditioner.
ļ For more complicated maintenance contact a qualified technician.
6.1 Preseason Checklist
(1) Check if air inlets and air outlets of indoor and outdoor units are blocked;
(2) Check whether ground connection is secure;
(3) Check whether the wires are connected securely;
(4) After turning power, check to see if display on controller is working.
6.2 Post Seasonal Maintenance
(1) Run the air conditioner at fan mode on a sunny day for about 12 hours to dry the internal parts of
unit.
(2) If the air conditioner won’t be used for an extend period of long time, please cut off the power to
save energy. After cutting off the power, the characters on the screen of wire controller will
disappear.
25
V5 HR Heat Recovery Cooling and Heating Mode Exchanger
7 Troubleshooting
If the air conditioner malfunctions, please check below items before calling for service:
Malfunction
Causes
Power supply hasn’t been connected
Short circuit or tripped breaker
Voltage is too low
Unit is turned off at control panel
Malfunction of control loop wiring
Air conditioner can’t be started up
ķ
ĸ
Ĺ
ĺ
Ļ
Air conditioner can operate, but it
will stop after a while
ķ There’s an obstruction in front of condenser
ĸ Control loop is malfunctioning
Ĺ In cooling mode outdoor ambient temperature must be below 43e
C(109.4eF)
Poor cooling performance
ķ
ĸ
Ĺ
ĺ
Ļ
ļ
Air filter is dirty or blocked
There is a heat source or too many people in the room
Door or window is open
There are obstacles at air inlet or air outlet
Thermostat is set too high or refrigerant is leaking
Room temperature sensor is malfunctioning
Poor heating performance
ķ
ĸ
Ĺ
ĺ
Ļ
ļ
Air filter is dirty or blocked
Door or window is not closed well
Thermostat is set too low
Refrigerant is leaking
Outdoor ambient temperature is below -5eC(23eF)
Control wiring is malfunctioning
Indoor fan can’t be started up
under heating mode
ķ
ĸ
Ĺ
ĺ
The tube temperature sensor is not properly installed
Tube temperature sensor is not inserted correctly
Wires for tube temperature sensor are broken
Capacitor is short circuiting
Caution˖
˖
After checking above items, if the air conditioner still can’t operate normally, please turn off the air
conditioner immediately and then contact a qualified maintenance technician.
26
Specifications & illustrations subject to change without notice
or incurring obligations.
O’Fallon, MO (12/15) © Nortek Global HVAC, LLC 2015.
All Rights Reserved. 549E-1215
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