Nortek V5BV-36WMAK User manual

NORTEK GLOBAL HVAC, LLC
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DC Inverter Multi VRF System
Owner's Manual
Heat Pump
Applicable Models:
V5BV-36WMAK
V5BV-48WMAK
V5BV-60WMAK
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zPlease read this owner’s manual carefully before operation and retain it for future reference
zSpecifications & illustrations subject to change without notice or incurring obligations

DC Inverter Multi VRF System
Preface
The DC Inverter Multi VRF System, with the most advanced technology in the world, uses eco-friendly
refrigerant R410A. For correct installation and operation, please read this manual carefully. Before reading
the manual, please note that:
(1) Multi VRF system conforms to design standard: ARI 210240-2008
(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 refernce.
(5) In case of malfunction, please check the following items and contact a qualified technician as soon
as possible.
1) Nameplate (model, cooling capacity, product code, manufacture 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 service
technician.
(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 system won’t be used for an extended period, turn off the power of
the complete unit. However, the system will require preheating the next time it is used.

Contents
1 Safety Precautions………………………………………………………………………………………………………………………………………………… 1
2 Product Introduction………………………………………………………………………………………………………………………………………………..3
2.1 Names of Main Parts.........................................................................................................................................3
2.2 Combinations of Indoor and Outdoor Units ...................................................................................................4
2.3 Operating Range................................................................................................................................................4
3 Preparation before Installation ....................................................................................................................................5
3.1 Standard Parts....................................................................................................................................................5
3.2 Installation Site...................................................................................................................................................6
3.3 Piping Work Requirements...............................................................................................................................7
4 Installation Instruction…………………………………………………………………………………………………………………………………………….8
4.1 Dimension of Outdoor Unit and Mounting Hole………………………………………………………………………………………..8
4.2 Connection Pipe.................................................................................................................................................9
4.3 Installation of Connection Pipe ......................................................................................................................13
4.4 Disassembly of Compressor Feet .................................................................................................................18
4.5 Vacuum Pumping, Refrigerant Adding…………………………………………………………………………………………………….19
4.6 Electric Wiring ..................................................................................................................................................21
5 Check Items after Installation and Test Operation .................................................................................................25
5.1 Check Items after Installation.........................................................................................................................25
5.2 Test operation and debugging………………………………………………………………………………………………………………….25
6 Common Malfunctions and Troubleshooting ..........................................................................................................30
7 Error Indication……………………………………………………………………………………………………………………………………………………..31
8 Function Setting of Outdoor Unit ..............................................................................................................................36
8.1 ODU Quiet Function ........................................................................................................................................36
8.2 Cool & Heat Function ......................................................................................................................................37
8.3 Forced Defrosting ............................................................................................................................................37
8.4 Restore Factory Defaults ................................................................................................................................38
8.5 Static Pressure Function.................................................................................................................................38
9 Maintenance and Care...............................................................................................................................................39
9.1 Outdoor Heat Exchanger................................................................................................................................39
9.2 Drain Pipe .........................................................................................................................................................39
9.3 Notice before Seasonal Use ..........................................................................................................................39
9.4 Maintenance after Seasonal Use ..................................................................................................................39
9.5 Parts Replacement ..........................................................................................................................................39
10 After-sales Service....................................................................................................................................................40

DC Inverter Multi VRF System
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1 Safety Precautions
WARNING NOTICE: Failure to comply with warning notice could result in property
damage, serious personal injury or death...
CAUTION NOTICE: Failure to comply with caution notice could result in property damage
or personal injury.
NOTICE: Failure to comply with notice could result
in property damage..
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(1)
Instructions for installation and use of this product are provided by the manufacturer.
(2)
Installation must be performed by qualified personnel only.
(3)
Please follow installation instructions as outlined in this manual.
(4)
Use appropriate pipe connection material and appropriate electrical cord as outlined in this manual.
(5) Before installation, check the power cord if it complies with the power supply requirement on the nameplate.
Make sure the power supply is safe.
(6) This air conditioner must be properly grounded through the receptacle to avoid electric shock. The ground
wire shouldn’t be connected to gas pipe, water pipe, lightning rod or telephone line.
(7) If refrigerant leaks while work is being carried out, ventilate the area. If the refrigerant comes in contact with a
flame, it produces toxic gas.
(8)
Do not power on until all installation work is complete.
(9) During installation, make sure that the refrigerant pipe is attached firmly before you run the compressor.
Do not operate the compressor with gas pipe and liquid pipe valve open.
This may cause abnormal pressure in the refrigeration cycle that leads
compressor damage or personal
injury.
(10) During the pump-down operation, make sure that the compressor is turned off before you remove the
refrigerant piping.
This may cause abnormal pressure in the refrigerant cycle that leads to
compressor damage or personal
injury.
(11) When installing the air conditioner, do not mix gases other than the specified refrigerant (R410A) to enter the
refrigerant cycle.
(12) If air or other gas enters the refrigerant cycle, the pressure inside the cycle will rise to an abnormally high
value and cause compressor damage or personal injury.
(13)
This appliance is not intended for use by persons (including c
hildren) with reduced physical, sensory or
mental capabilities, or lack of experience and knowledge,.
(14)
Children should be supervised to ensure that they do not play with the appliance.
(15)
If the supply cord is damaged, it must be with an appropriate size cord.
(16) When installing, approved parts and accessories must be used. Otherwise, it may result in water leakage,
electric shock or fire hazard.
(17) Diameter of power cord must be large enough. Damaged power cord or connecting wire must be replaced by
approved electric cable.
(18)
After the power cord is connected, please install the cover of electric box to avoid danger
(19)
Nitrogen must be charged according to technical requirements.
(20) For units with wired controllers, do not connect power supply until the wired controller is connected.
Otherwise, the wired controller may be damaged.
(21) When installation is finished, please check and make sure the drain pipe, pipeline and electric wire are all well
connected so as to avoid water leakage, refrigerant leakage, electric shock and fire hazard.
(22)
Do not insert fingers or objects into air outlet or return air grille.
(23) If you use gas heater or petroleum heater in the same room, please open the door or window to maintain
good air ventilation.

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(24)
Never start or stop the air conditioner by plugging or unplugging the power cord.
(25) Do not turn off the air conditioner until it runs for at least 5 minutes. Otherwise, the compressor oil return
system will malfunction.
(26)
Children are not allowed to operate the air conditioner.
(27)
Do not operate the air conditioner with wet hands.
(28) Please turn off and unplug your air conditioner before cleaning. Otherwise, it may cause electric shock or
personal injury.
(29)
Do not spray water on the air conditioner or it will cause malfunction or electric shock.
(30)
Do not expose the air conditioner directly to damp or corrosive environment.
(31) Connect power 8 hours before startup operation. Do not disconnect power when you want to stop the unit for
a short period of time, e.g. in one night. (This is may cause damage to the compressor.)
(32) Volatile liquid like paint thinner or gasoline will damage the appearance of air conditioner. (Please use soft dry
cloth or damp cloth with mild detergent to clean unit’s outer case.)
(33) Under cool mode, do not set the indoor temperature too low. Keep the difference between indoor temp and
outdoor temp within 5
ć
(9

).
(34)
If abnormal condition occurs (e.g. unpleasant smell), please turn off the unit at onc
e and disconnect power
supply.If the air conditioner continues to operate abnormally, it may
be damaged and cause electric shock or
fire hazard.). Contact a qualified HVAC technician.
(35) Do not repair the air conditioner by yourself. Improper repair will cause electric shock or fire hazard. Contact a
qualified HVAC technician for service.
(36) 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.

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2 Product Introduction
This equipment uses inverter compressor technology. This allows the compressor to
modulate at a range of 15%~100%...
2.1 Names of Main Parts
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V5BV-36WMAK
V5BV-48WMAK
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
V5BV-60WMAK

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Fig.1
No.
ķ
ĸ
Ĺ
ĺ
Ļ
Name Motor Fan blade
Electric box
assembly
Gas pipe valve
Liquid pipe
valve
2.2 Combinations of Indoor and Outdoor Units
 See below the number of indoor units that can be connected to the outdoor unit.
 The total capacity of indoor units should be within 50%~135% of that of the outdoor unit.
Model Min sets of connectable
IDUs
Max sets of connectable IDU
S
V5BV-36WMAK 2 7
V5BV-48WMAK 2 8
V5BV-60WMAK 2 13
 Outdoor DC Inverter Multi VRF System units can be connected to various indoor units.
As indoor units start or stop, outdoor unit will adjust as per required capacity. When all
indoor units stop, outdoor unit will be shut off.
2.3 Operating Range
Cooling Outdoor temperature: -5ć48ć(23~118)
Heating Outdoor temperature: -20ć27ć(-4~81)
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3 Preparation before Installation
NOTICE! Graphics here are only for reference. Please refer to actual products.
3.1 Standard Parts
Please use the supplied standard parts as required.
Parts for Outdoor Unit
No.
Name
Appearance
Qty
Remark
1
User Manual
1
2
Wiring (match with
resistance)
1
Must be connected to the
last IDU of communication
connection
3
Corrugated pipe
1
V5BV-36WMAK
V5BV-48WMAK
 Liquid side
connection pipe
1
This part is included in the
following models:
V5BV-60WMAK
 Gas side
connection pipe
1
This part is included in the
following models:
V5BV-60WMAK
6
Drainage hole cap

3
7
Drainage joint

1

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3.2 Installation Site
(1) Check the support structure to verify that it has sufficient load-carrying capacity to support the weight of the
unit, and it can be securely mounted.
(2)
Do not install where there is a danger of combustible gas leakage.
(3)
Do not install the unit near heat source, steam, or flammable gas.
(4)
Children should be kept away from unit.
(5)
Select a location which is out of children’s reach. Keep the unit away from children.
(6)
Unit should be installed so that air flow pattern is free of obstruction.
(7)
Be sure to leave sufficient space around the unit for service and maintenance..
(8)
Install the unit level. It should not tilt by more than 5°.
(9)
The unit should be mounted securely to withstand high wind potential for your location.
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(1) If possible, do not install the unit where it will be exposed to direct sunlight. (If necessary, install a blind that
does not interfere with the air flow.)
(2)
Install ODU in a place where it will be free from dirt or rain as much as possible.
(3)
Install ODU where it is convenient to connect IDU.
(4) ODU and IDU should be installed as close as possible to shorten the length of refrigerant pipe and reduce
bend angles.
(5) Install ODU where the condensate water can be drained out freely. Do not place animals and plants in the
path of the warm air.
(6) Check the support structure to verify that it has sufficient load-carrying capacity to support the weight of the
unit. Mount the unit securely to reduce vibration noise

If the ODU is totally surrounded by walls, please refer to the following figures for clearances:
Fig.2

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3.3 Piping Work Requirements
Refer to the table below for piping work requirements:

R410A Refrigerant System
Outer diameter (mm/inch) Wall thickness(mm/ inch)
Φ6.35(Φ1/4) ≥0.8(1/32)
Φ9.52(Φ3/8) ≥0.8(1/32)
Φ12.7(Φ1/2) ≥0.8(1/32)
Φ15.9(Φ5/8) ≥1.0(1/25)
Φ19.05(Φ3/4) ≥1.0(1/25)

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4 Installation Instruction
NOTICE! Graphics here are for reference only. Please refer to actual products.
4.1 Dimension of Outdoor Unit and Mounting Hole
Unit Outline and Installation Dimension:
Fig.3
Unit:mm(inch)
Model
A
B
C
D
E
V5BV-36WMAK
V5BV-48WMAK
900
(35-3/8)
340
(13-3/8)
1345
(53)
572
(22-1/2)
378
(15)
V5BV-60WMAK 940
(37)
320
(12 3/5)
1430
(56 2/7)
632
(24 7/8)
350
(14 7/8)
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4.2 Connection Pipe
4.2.1 Schematic Diagram of Piping Connection
Fig.4

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4.2.2 Allowable Length and Height Difference of Connection Pipe
Y type branch joint is used to connect indoor and outdoor units. Connecting method is shown
in the figure below:
NOTICE! Equivalent length of one Y-type branch is 0.5m(1-1/2 feet).
Fig.5 Allowable Length and Height Difference of Connection Pipe
Piping parameters of V5BV-36WMAKǃV5BV-48WMAKǃV5BV-60WMAK
Allowable value
Fitting pipe
m
feet
Total length of fitting pipe300
1000
L1+L2+L3+a+b+c+d
Length
from
farthest fitting pipe
120 120
400
L1+L2+L3+d
150 150
500
From the 1st branch to the farthest indoor pipe40
130
L2+L3+d
Height difference between ODU
and IDU
50 50
165
——
40 40
130
——
Height difference between IDUs15
50
——

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4.2.3 Dimension of Pipe (Main Pipe) from ODU to the 1st Indoor Branch
Dimension of pipe from ODU to the 1st indoor branch will be determined by the dimension of
outdoor connection pipe.
Fig. 6
Dimension of outdoor connection pipe:
Basic module
Pipe dimension
Gas pipe
(mm/inch)
Liquid pipe
(mm/inch)
V5BV-36WMAK
φ15.9
(φ5/8)
φ9.52
(φ3/8)
V5BV-48WMAK
φ15.9
(φ5/8)
φ9.52
(φ3/8)
V5BV-60WMAK Φ19.05
(φ3/4)
φ9.52
(φ3/8)
4.2.4 Selection of Indoor Branches
Select indoor branches according to the total capacity of downstream indoor units.

Fig.7

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Refrigerant system
Total capacity of downstream indoor units C (Btu/h)
Model
Y type branch
C< 68200
FQ01A
68200İCİ102400
FQ01B
102400
˘
C
İ
238800
FQ02
238800
˘
C
İ
460600
FQ03
460600
˘
C
FQ04
4.2.5 Dimension of Pipe between Indoor Branches
Select pipe between indoor branches according to the capacity of downstream indoor units; if
the capacity exceeds that of the outdoor unit, capacity of outdoor unit prevails.
Fig.8
Total capacity of downstream indoor units
C (Btu/h)
Pipe
(mm/inch)
Liquid pipe
(mm/inch)
C ≤19000
Φ12.7
(Φ1/2)
Φ6.35
(Φ1/4)
19000<C≤48500
Φ15.9
(5/8)
Φ9.52
(3/8)
48500<C≤76400
Φ19.05
(Φ3/4)
Φ9.52
(Φ3/8)

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4.2.6 Dimension of Pipe between Indoor Branch and IDU
Dimension of pipe between indoor branch and IDU should be consistent with the dimension of
indoor pipe.
Fig. 9
Rated capacity of IDU
C(Btu/h)
Gas pipe
(mm/inch)
Liquid pipe (mm
/inch)
C≤9600
Φ9.52
(Φ3/8)
Φ6.35
(Φ1/4)
9600<C≤17000 Φ12.7
(Φ1/2)
Φ6.35
(Φ1/4)
17000<C≤48000
Φ15.9
(Φ5/8)
Φ9.52
(Φ3/8)
48000<C≤55000
Φ19.05
(Φ3/4)
Φ9.52
(Φ3/8)
55000<C≤96000 Φ22.2
(Φ7/8)
Φ9.52
(Φ3/8)
NOTICE! If the distance between IDU and its nearest branch is over 10m(33feet), then the
liquid pipe of IDU (rated capacity ≤17000Btu/h) shall be enlarged.
4.3 Installation of Connection Pipe
(1) Observe the following during pipe connection: Connection pipe should be as short as possible. Height
difference between indoor and outdoor units should be as short as possible. Keep the number
of bends as
few as possible. Radius of curvature should be as large as possible.
(2) Weld the connection pipe between indoor and outdoor units. Strictly follow the requirements for welding
process. Rosin joint or pin hole is not allowed.
(3) When laying the pipe, be careful not to distort it. Radius of bending parts should be over 200mm(8inch). Note
that pipes cannot be repeatedly bent or stretched; otherwise it will become brittle and break. D
o not bend or
stretch the pipe for more than 3 times at the same position.

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4.3.1 Flaring Process
(1) Use pipe cutter to cut pipe to avoid misshaping.
(2) Keep the pipe downward in case cutting scraps get into the pipe. Clear away the burrs
after cutting.
(3) Remove the flared nut from the valve on both the indoor and outdoor units. Then use
flaring tool to fix the flared nut into the pipe (as shown in Fig.10).
(4) Check if the flared part is flaring evenly and if there is no crack.
Fig.10
4.3.2 Pipe Bending
(1) Extend the pipe by hand. Be careful not to crimp it.
(2) Do not bend the pipe more than 90°.
(3) If pipe is repeatedly bent or stretched, it will weaken making it more likely to break. Do
not bend or stretch the bend for over 3 times.
(4) For best results, cut insulation before bending, as shown in Fig.12. Bend pipe as needed and secure
insulation with tape.
Fig.11 Fig.12
4.3.3 Indoor Pipe Connection
(1) Remove pipe cover and pipe plug.
(2) Direct the flared part of copper pipe to the center of screwed joint. Twist on the flared nut
tightly by hand, as in Fig. 13. (Make sure indoor pipe is correctly connected. Improper alignment of
the center will prevent flared nut from being securely fastened. Thread of nut will get damaged if
not aligned correctly.)
(3) Use torque wrench to tighten the flared nut until the wrench gives out a click sound.
(Hold the handle of wrench at right angle to the pipe. as in Fig. 14)

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(1) Use sponge to wrap the un-insulated connection pipe and joint. Then secure the sponge tightly with plastic
tape.
(2) Connection pipe should not be supported by the unit.
(3) The bending angle of piping should not be too small; otherwise the piping might have cracks. Please use a
pipe bender to bend the pipe.
(4) When connecting IDU with connection pipe, do not pull on the pipe or pipe joints in case the capillary tube or
other tubes have cracks and cause leakage.

Fig.13 Fig.14
Pipe Diameter
Tightening Torque
6mm(1/4inch)
15-30N·m(11-22ft.-lb.)
9.5mm(3/8 inch)
35-40N·m(26-29ft.-lb.)
12.7mm(1/2 inch)
45-50N·m(33-37ft.-lb.)
16mm(5/8 inch)
60-65N·m(44-48ft.-lb.)
4.3.4 Outdoor Pipe Connection
Twist the flared nut on the connection pipe of outdoor valves. Twisting method is the same as
for indoor pipe connection.
According to customer requirement or space limit, outlet pipe can be installed from the front,
right or rear side.
Fig. 15

DC Inverter Multi VRF System
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
As shown in Fig.16 and Fig.17, open the outermost soundproof cotton and place a fire
barrier between compressor and straight pipe. Use a soldering gun to unsolder straight pipe 1
and straight pipe 2. Install connection pipe 1 and connection pipe 2 to the corresponding
position and then seal the apertures with welding rod. First weld the liquid side connection
pipe and then weld the gas side connection pipe. During welding, it’s necessary to use wet
gauze to wrap up the two cut-off valves. Make sure the flame won’t burn the soundproof
cotton or other components.

Fig. 16

Fig. 17







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4.3.5 Installation of Y-type Branch
(1) Y-type Branch
Fig. 18
(2) Y-type branch has several pipe sections with different dimensions, which facilitates
matching to various copper pipes. Use pipe cutter to cut in the middle of the pipe section and
remove burrs. See Fig. 17.
(3) Y-type branch must be installed vertically or horizontally.
Fig. 19

Branch shall be isolated by insulating material that can bear 120
ć(248
)or even higher temperature. The foam
attached to the branch is not considered as insulating material.
4.3.6 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(19-3/4inch) straight pipe section.
(3) Thermal insulation for pipeline
1) To avoid condensate or water leakage on the connection pipe, the gas pipe and liquid
pipe must be wrapped with thermal insulating material and adhesive.
2) Joints of indoor and outdoor unit should be wrapped with insulating material leaving no
gap between pipe and wall. See Fig. 20.