Page 1
INSTALLATION/OPERATION
INSTRUCTIONS
©2018 Lennox Industries Inc.
Dallas, Texas, USA
THIS MANUAL MUST BE LEFT WITH THE
OWNER FOR FUTURE REFERENCE
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage,
personal injury or loss of life.
Installation and service must be performed by a licensed professional HVAC installer, service agency
or the gas supplier.
Failure to follow safety warnings and these instructions exactly could result in property damage, dangerous operation, serious injury, or death.
Any additions, changes, or conversions required in
order for the appliance to satisfactorily meet the application needs must be made by a licensed professional HVAC installer (or equivalent) using factoryspecifi ed parts.
Do not use this system if any part has been under
water. A fl ood-damaged appliance is extremely dan-
gerous. Immediately call a licensed professional
HVAC service technician (or equivalent) to inspect
the system and to replace all controls and electrical
parts that have been wet, or to replace the system, if
deemed necessary.
Mini-VRF Heat Pump
VPA***H4-2P
VRF SYSTEMS
OUTDOOR UNITS
507641-07
04/2018
CAUTION
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves and
protective clothing.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting
of refrigerant (CFC’s and HCFC’s) as of July 1, 1992.
Approved methods of recovery, recycling or reclaiming
must be followed. Fines and/or incarceration may be
levied for non-compliance.
General
The Mini-VRF heat pump outdoor units are matched
with up to nine indoor units to create a VRF (variable
refrigerant fl ow) system that uses R-410A refrigerant.
Refer to the Product Specifi cation bulletin (EHB) for
the proper use of these heat pumps with matching
indoor units, branch boxes, branch pipes, line sets
and controls.
These instructions are intended as a general guide
and do not supersede local or national codes in any
way. Authorities having jurisdiction should be consulted before installation.
Shipping and Packing List
Check the components for shipping damage. If you
fi nd any damage, immediately contact the last carrier. Package 1 of 1 contains the following:
1 - Assembled Mini-VRF heat pump outdoor unit
1 - Outdoor unit installation instruction
1
Page 2
Safety Requirements
!
WARNING
ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD.
Do not touch the unit or the controller if your hands are wet.
Do not operate appliances with an open fl ame near the unit.
Do not replace a fuse with a fuse of a different rating. Do not use a jumper wire to replace a fuse. Do not insert
your hands, tools or any other item into the air intake or air outlet at either the indoor or outdoor unit.
Do not allow children to operate the system.
Model Number Identifi cation
V P A 036 H 4 M - 2 P
Brand/Family
V = Variable Refrigerant Flow (VRF)
Voltage
P = 208/230V-1 phase-60hz
Unit Type
P = Heat Pump Outdoor Unit
Minor Design Sequence
1 = 1st Revision
Major Design Sequence
A = 1st Generation
2 = 2nd Revision
3 = 3rd Revision
Refrigerant Circuits
Nominal Cooling Capacity - Tons
M = Multiple Circuits
036 = 3 Tons
048 = 4 Tons
060 = 5 Tons
Refrigerant Type
4 = R-410A
Cooling Effi ciency
H = High Effi ciency
NOTE - Lennox VRF and Lennox Mini-Split products are similar in appearance to each other. Refer to the unit’s model
number to determine if the unit is a VRF (V) or Mini-Split (M) unit. It is not possible to mix the two types of equipment
on any system.
System Piping
CAUTION
VRF system piping is customized for each installation.
The Lennox VRF Selection Software (LVSS) piping
report is an engineered design that must be followed.
The piping diagram or diagrams included within the LVSS
report have been prepared based on the information
provided to the Lennox VRF applications department.
When the indicated lengths change from the fi gures
stated within the report, it is imperative that prior to the
commencement of the refrigerant pipe work installation,
Lennox VRF applications department are informed of
these proposed changes.
CAUTION
Upon receipt of this new information the Lennox VRF
applications department will confi rm any changes that
may be applicable to this installation. If changes are
required, a new piping diagram will be produced and will
supersede all other previously provided documents.
Failure to provide this information regarding changes
to the original design may lead to insuffi cient capacity,
equipment failure, warranty being made void and the
refusal to commission the system.
2
Page 3
Dimensions - Inches (mm)
CORNER WEIGHTS CENTER OF GRAVITY
Model No. AA BB CC DD EE FF
lbs. kg lbs. kg lbs. kg lbs. kg in. mm in. mm
All Models 40 18 63 29 72 33 45 21 21-5/8 549 7-3/8 187
13-3/4
(349)
AA
12-5/8
(321)
DD
3/4
(19)
23-5/8 (600)
CENTER OF
GRAVITY
EE
TOP VIEW
FF
6
(152)
BB
14-1/4
(362)
CC
15-3/4
(400)
52-1/4
(1327)
35-3/8 (899)
FRONT VIEW
3
Page 4
Installation Clearances - inches (mm)
Single Unit Installation
(Wall or Partition)
12
(305)
Minimum
Air inlet
NOTE - 24 in. (610 mm) clearance required on top of unit.
Parallel Units Side by Side
Air Inlet
Front of Unit
79 (2007)
Minimum
(Wall or Partition)
12 (305) Minimum
Air Outlet
24
(610)
Minimum
(Service
Clearance)
NOTE - If unit is surrounded on three
or four sides by walls or partitions
that are taller than 10 ft. (3 m), call
Lennox VRF Applications group to
discuss additional requirements.
12 (305) Minimum
24
(610)
Minimum
79 (2007)
Minimum
(Service Clearance)
Front of Units
Parallel Units Back to Back, Facing and Front to Back
Back to Back Facing Units Front to Back
79
(2007)
Min.
20
(508)
Min.
118
(2997)
Min.
118
(2997)
Min.
(Wall or Partition)
12
(305)
Min.
(Wall or Partition)
4
Page 5
Unit Placement
WARNING
Use the provided and specifi ed components when
installing equipment. Failure to do so may result in
unit falling, water leaking or electrical shocks, causing personal injury or equipment or property damage.
Check stability of unit support. If sup port is not
capable of carrying weight of the unit, unit may fall
causing personal injury or equipment damage.
Safely dispose of packing materials, which include
nails, wood and other sharp objects, as well as
plastic wrapping. Children playing with plastic wrap
or bags risk the danger of suffocation.
Outdoor Unit Positioning Considerations
In addition to clearances, the following items should
be considered when setting the outdoor unit:
• Some local governments have adopted sound
ordinances based on the unit’s sound level registered from the adjacent property, not from the
property where the unit is installed. Install the
unit as far as possible from the property line.
• Glass has a very high level of sound transmission. When possible, do not install the unit directly outside a window.
• Avoid installing the unit in areas exposed to extreme voltage variations (such as factories).
• Install unit level.
• Install the unit high enough above the ground or
roof to allow adequate drainage of defrost water and prevent ice or snow build-up (required for
heat pumps).
• The unit base should be elevated above the
depth of average snows. In heavy snow areas,
do not locate the unit where drifting will occur.
• When installed in areas where low ambient temperatures exist, locate unit so winter prevailing
winds do not blow directly into outdoor unit.
• Locate unit away from overhanging roof lines
which would allow water or ice to drop on, or in
front of, coil or into unit.
• Allow suffi cient space around unit for proper op-
eration and maintenance.
• Install the outdoor unit a minimum of 3 feet away
from any antenna, power cord (line), radio, telephone, security system, or intercom. Electrical
interference and radio frequencies from any of
these sources may affect operation.
IMPORTANT
Exhaust vents from dryers, water heaters and
furnaces should be directed away from the
outdoor unit. Prolonged exposure to exhaust
gases and the chemicals contained within them
may cause condensation to form on the steel
cabinet and other metal components of the outdoor unit. This will diminish unit performance
and longevity.
Lifting the Unit
• Do not hold the air inlet grille while lifting the unit.
This could result in damage to the cabinet.
• Do not touch the fan blades with your hands or
other objects while lifting the unit.
Installation
IMPORTANT
Roof Damage!
This system contains both refrigerant and
oil. Some rubber roofi ng material may absorb
oil. This will cause the rubber to swell when
it comes into contact with oil. The rubber will
then bubble and could cause leaks. Protect the
roof surface to avoid exposure to refrigerant
and oil during service and installation.
Failure to follow this notice could result in damage to roof surface.
SLAB OR ROOF MOUNTING
Install the unit a minimum of 4 inches (102 mm)
above the roof or ground surface to avoid ice build-up
around the unit. Locate the unit above a load bearing
wall or area of the roof that can adequately support
the unit. Consult local codes for rooftop applications.
• Use a fi eld-provided slab or frame as specifi ed in
the Product Specifi cations (EHB) bulletin.
• Install the unit in an upright and level position.
• If the unit coil cannot be installed away from
prevailing winter winds, a wind barrier should
be constructed. Size barrier at least the same
height and width as outdoor unit. Install barrier
12 inches (305 mm) minimum from the sides of
the unit in the direction of prevailing winds.
5
Page 6
Securing Outdoor Unit to Slab or Frame
• Brackets are provided at the base of the outdoor
unit so that it can be secured to a fi eld-provided
slab or frame.
• Use lag bolts or equivalent to secure the outdoor
unit to the slab or frame. Figure 1.
FIELD-PROVIDED
ANCHOR BOLTS (4)
(Two on each side)
Condensate Drains
• The bottom of the outdoor unit is equipped with
multiple drain holes to route water away from the
unit during a defrost cycle. See fi gure 3.
• If water produced during the defrost cycle is not
drained away from the unit before it re-freezes,
the drain may be blocked by ice.
• Protect drain holes to avoid access to the inside
of the unit by bugs and other pests.
• Use a fi eld-provided base pan if required for the
application.
DRAIN HOLE
Figure 1. Securing Outdoor Unit to Slab
Securing Outdoor Unit to Wall-Mounted Brackets
• Units can be secured to fi eld-provided wall-
mounted brackets as long as the following
conditions are met.
• Use lag bolts or equivalent to secure the outdoor
unit to the wall-mounted brackets. Figure 2.
• Maintain proper air fl ow clearances.
NOTE - Minimum rear clearance can be 6 inches
(152 mm) when mounted on brackets and with
no obstructions on the other three sides.
12 in
305 mm
Air Inlet
Air Outlet
DRAIN HOLE
BOTTOM VIEW
Figure 3. Factory-Provided Drains
NOTE - Minimum rear clearance can be 6 inches
(152 mm) when mounted on brackets and with no
obstructions on the other three sides.
Figure 2. Unit on Wall-Mounted Brackets
6
Page 7
Cold Climate Considerations
CAUTION
When operating the heat pump in a low outdoor
ambient temperature, be sure to follow the instructions
described below.
- To prevent exposure to wind, install the outdoor unit
with its suction side facing the wall.
- Never install the outdoor unit at a site where the
suction side may be exposed directly to wind.
- To prevent exposure to wind, install a wind barrier on
the air discharge side of the outdoor unit.
- In heavy snowfall areas, select an installation site
where the snow will not affect the unit.
Snow and Ice Protection
• Install the unit high enough above the ground or
roof to allow adequate drainage of defrost water
and prevent ice or snow build-up.
• Carefully consider how to manage defrost water
disposal to prevent ice from blocking walkways
or creating a safety hazard near the outdoor unit.
• In heavy snow areas, do not locate the unit
where drifting will occur. The unit base should
be elevated above the depth of average snows.
Locate unit away from overhanging roof lines
which would allow water or ice to drop on, or in
front of, coil or into unit.
• There must be unobstructed air fl ow around the
air inlet and the air outlet.
• The unit must not be installed in areas where a
fl ammable gas leak may occur.
NOTE - VPA***H4-2P units have a factory-installed
base pan heater.
Protective
canopy
Pedestal
(stand)
Air Outlet
12 in
305 mm
Air Inlet
610 mm
Front ViewSide View
Protective
canopy
24 in
Pedestal
(stand)
Figure 4. Unit on Pedestal (Stand) Above Snow
Line
12 in
305 mm
Air Inlet
79 in
2007 mm
Air Outlet
Figure 5. Air Flow Obstructed by Snow
7
Page 8
12 in
305 mm
Air Inlet
Air Outlet
NOTE - Minimum rear clearance can be 6 inches
(152 mm) when mounted on brackets and with no
obstructions on the other three sides.
Prevailing Winds Protection
If unit coil cannot be installed away from prevailing
winter winds, some method of protecting the
coil is required. Minimum clearances from wind
barrier must be observed at all times. Common
application examples are:
• Construct a wind barrier. Size barrier at least the
same height and width as outdoor unit. Install a
barrier 12 inches (305 mm) minimum from the
sides of the unit in the direction of prevailing
winds.
• Install outdoor unit in dog house-style shelter.
• Install outdoor unit in alcove, under roof
overhang.
Prevailing Winter Winds from Air Inlet Side
Wind Barrier
Inlet Air
12” (305mm)
Min. Distance
Figure 6. Unit on Brackets Above Snow Line
12 in
305 mm
79” (2007mm)
Discharge Air
Wind Barrier
Prevailing Winter Winds From Air Discharge Side
Min. Distance
Figure 8. Unit with Wind Barrier
24 in
610 mm
24 in
610 mm
12 in
305 mm
Figure 7. Avoid Defrost Water Ice Hazard
NOTE - Minimum clearances apply.
Figure 9. Unit Inside of Mechanical Enclosure
8
Page 9
Buried Refrigerant Pipe Protection
• All refrigerant lines must be insulated
regardless of if it is buried.
• In addition to insulating each line of piping,
buried lines must rest inside a sealed,
watertight conduit.
• The conduit must be designed so it cannot
collect and retain water.
Structure
NOTE - Minimum clearances apply.
Figure 10. Unit installed in Alcove
Insulated Refrigerant Pipes
Watertight seal
Conduit
Watertight seal
Watertight seal
Figure 11. Buried Refrigerant Pipe Protection
9
Page 10
Installing the Unit Inside of Building
Mini-VRF outdoor units may be installed indoors if
the following guidelines are followed.
• Refer to Figure 12 for critical clearances.
• If fi eld-fabricating ductwork to directly discharge
air outdoors, use the dimensions shown in Figure 15 as a guide.
• Include inspection doors in discharge ductwork
within 12 inches (305 mm) of the unit.
• Do not restrict access to the unit’s electrical
service panel.
• Allow enough space between the unit and exterior wall to allow for coil service.
• Provide a drain pan underneath the unit to prevent condensation leaks.
• Contact VRF Applications support for guidance
for your application.
email: vrftechsupport@lennoxind.com
phone: 844-GET-VRF1 (844-438-8731)
Supply air inlet
requirements
1721.06 sq.in.
Air inlet
or
CFM = 4100
NOTES- Louver angle should not exceed 15°.
24 in. (610 mm) clearance
required on top of unit.
Makeup air requirements are equal
to or greater than discharge air
volume. Size makeup air openings
appropriately to supply adequate air
for the outdoor unit.
Unit clearances apply.
Check fan load amps (FLA), during
Forced Cooling operation, after
installation.
Install a field-supplied drain pan
under the unit.
Coil
Minimum
12
(305)
Air Inlet
Front of Unit
Air Outlet
(Wall or Partition)
12 (305) Minimum
36
(914)
Minimum
(Service
Clearance)
Obstructions
(610)
Minimum
(Service
Clearance)
55
(1397)
Before
Adjacent
24
Figure 12. Inside Installation Clearances
Top View
10
Page 11
Unit
Rear
Supply air inlet
requirements
1721.06 sq.in.
or
CFM = 4100
Exterior Wall
Discharge Air Opening
NOTES- Louver angle should not exceed 15°.
24 in. (610 mm) clearance required on top of unit.
Makeup air requirements are equal to or greater than discharge air volume. Size makeup air openings
appropriately to supply adequate air for the outdoor unit.
Unit clearances apply.
Check fan load amps (FLA), during Forced Cooling operation, after installation.
Install a field-supplied drain pan under the unit.
Figure 13. Louvered Discharge Opening Considerations
36
(914)
Minimum
(Service
Clearance)
55
(1397)
Before
Adjacent
Obstructions
11
Page 12
Unit
Rear
Exterior Wall
Field-Supplied Duct
Field-supplied foam
insulating tape
NOTES- Louver angle should not exceed 15°.
24 in. (610 mm) clearance required on top of unit.
Makeup air requirements are equal to or greater than discharge air
volume. Size makeup air openings appropriately to supply adequate
air for the outdoor unit.
Unit clearances apply.
Check fan load amps (FLA), during Forced Cooling operation, after
installation.
Install a field-supplied drain pan under the unit.
Figure 14. Ducted Discharge Considerations
2”
1-5/8”
Inspection Door
within 12 inches
(305 mm) of unit
Supply air inlet
requirements
1721.06 sq.in.
or
CFM = 4100
Inspection Door
within 12 inches
(305 mm) of unit
3/4”
20-3/8”
44”
2-5/8”
Figure 15. Unit Front Dimensions
12
NOTE - Do not block access
to service panel
Page 13
Refrigerant Piping Connections
WARNING
Refrigerant leaks are unlikely; however, if a
refrigerant leak occurs, open a door or windows to
dilute the refrigerant in the room. Turn off the unit
and all other appliances that may cause a spark.
Call a licensed professional HVAC technician (or
equivalent) to repair the leak.
Use only R410A refrigerant to charge this system.
Use of other refrigerant or gas will damage the
equipment.
Do not allow air or other contaminants to enter
system during installation of refrigerant piping.
Contaminants will result in lower system capacity
and abnormally high operating pressures and may
result in system failure or explosion.
Insulate all refrigerant piping.
Refrigerant pipes may be very hot during unit
operation. Do not allow contact between wiring
and bare copper pipes.
After refrigerant piping connections have been
completed, check the system for leaks per
commissioning instructions.
REMOVE COVER PLATE
TO FACILITATE PIPING.
UNIT FRONT UNIT SIDE
Figure 16. Refrigerant Piping / Wiring Inlets
Table 1 lists the connection sizes at the outdoor
unit. The connections are made using the provided
brass fl are nuts at the end of the refrigerant piping
connections. Both liquid and gas (vapor) lines must
be individually insulated.
Table 1. Refrigerant Piping Connections
Model Liquid Line Gas (Vapor) Line
VPA036H4
VPA048H4
VPA060H4
3/8 in. 3/4 in.
Both liquid and gas (vapor) lines must be individually
insulated.
Field piping consists of two fi eld-provided copper re-
frigerant lines connected to the outdoor unit. These
lines carry the liquid and vapor refrigerant to and
from the indoor unit(s).
• The three-ton VPA036H4 can provide cooling to
as many as fi ve indoor units.
• The four-ton VPA048H4 can serve up to seven
indoor units.
• The fi ve-ton VPA060H4 can serve up to nine in-
door units.
Refrigerant piping and wiring connections can be
brought into the outdoor unit through openings provided in the front and side of the unit. See Figure 16.
13
Page 14
When multiple indoor units are served by a single
outdoor unit, the refrigerant piping must be connected using either branch box(es) or individual branch
pipes. Optional branch box V8MIDB01 and branch
pipes V8IDBP01 and V8IDBP02 are ordered separately.
Each branch box can be used to connect a maximum
of four indoor units to the outdoor unit. When the system includes fi ve, six, seven, or eight indoor units,
two branch boxes must be used. When the system
includes nine indoor units, three branch boxes must
be used.
From
Outdoor
Unit
A minimum of 39 inches (991 mm) of straight pipe
into the branch box.
A minimum of 20 inches (508 mm) of straight pipe
out of the branch box. See Figure 17.
When using branch pipes to connect multiple indoor
units with a single outdoor unit, each indoor unit requires a separate branch pipe to connect both the
liquid and gas (vapor) line to the system. Install these
optional devices per the installation instructions provided with them. See the piping schematics on the
following pages.
To
Indoor
Unit
First Elbow or Branch
Pipe Connection
>39” (991 mm)
Branch
Box
Figure 17. Straight Pipe In and Out
>20”
(508 mm)
14
Page 15
NOTE - Always slide a fl are nut onto the fi eld-provided
refrigerant piping before fl aring the lines.
1. The seal on the unit refrigerant piping connections
should remain in place until the last possible moment.
This will prevent dust or water from getting into the
refrigerant piping before it is connected.
2. Remove the fl are nuts from the connections on the
unit and discard the seal from each of the piping
connections.
3. Slide the fl are nuts onto the ends of the fi eld-provided
refrigerant piping before using a suitable fl aring tool to
fl are the end of the copper pipe.
4. Apply recommended R-410A refrigerant lubricant to
the outside of the fl ared refrigerant lines (Figure 18-
A).
5. Align the threaded connections with the fl ared
refrigerant lines. Tighten the fl are nuts lightly at fi rst to
obtain a smooth match (Figure 18-B).
IMPORTANT
The compressor in this unit contains PVE
oil (Polyvinylether). PVE oil is formulated for
hydrofl uorocarbon (HFC) refrigerants, such as R-
410a, which this system contains. While it may have
some miscibility properties with mineral-based oil
and POE oil (Polyolester), it is not recommended to
mix PVE oil with any other type of refrigerant oil.
6. Once snug, continue another half-turn on each
nut which should create a leak-free joint. A torque
wrench may be used to tighten fl are nuts using table
2 recommendations. See Figure 19. Do not over-
tighten a fl ared joint. Flared connections should
always be accessible and must be insulated to
prevent condensation.
7. Branch pipe connections may be brazed. It is
necessary to purge the pipes with nitrogen during
brazing to avoid oxidation which may block the
refrigerant piping.
IMPORTANT
Always use two wrenches when tightening fl are
nuts to avoid twisting refrigerant piping. DO
NOT over-tighten fl are nuts.
Torque
Wrench
Backup
To Indoor Unit
To Outdoor unit
Figure 19. Tighten Flare Nut
Table 2. Flare Nut Torque Recommendations
No torque wrench
Outside
Diameter
Inches
3/8” 26 ft.-lb. (35 N-m) 1/2 turn
3/4” 60 ft.-lb. (81 N-m) 1 turn
8. After refrigerant piping has been installed and checked
for leaks, apply insulation over all fl ared connections.
See Figure 20.
UNIT
BASE
Figure 20. Insulate Flared Connections
Recommended
Torque
Finger tighten and
use an appropriately
sized wrench to turn
INSULATE ALL FLARED CONNECTIONS
TO PREVENT CONDENSATION
Wrench
available
an additional:
A
CANT ON THE OUTSIDE OF
B
Figure 18. Making Connections
(Male to Female Connection)
THE FLARE
MALE FLARE
CONNECTION
15
Page 16
Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference - With Branch Pipe
NOTE - See Refrigerant Pipe Selection Table to size Main Outdoor Pipe.
L1
First Branch Pipe
Maximum Height Difference
Outdoor Unit to Indoor Unit
Mini-VRF
Heat Pump
Outdoor unit
L3
Description Designation
Main Outdoor Pipe - from outdoor unit to fi rst branch pipe L1
Main Indoor Pipe - from branch pipe to branch pipe L3, L4, L5, L6
Indoor Unit Pipe - from branch pipe to indoor unit L2, A, B, C, D, E
L2
Maximum Piping Equivalent Length
Maximum Piping Equivalent Length
from First Branch Pipe to farthest Indoor Unit
L4
A
B
L5
6
L
C
D
E
Indoor Units
Maximum Height Difference
Indoor Unit to Indoor Unit
Length and Maximum Height Difference Maximum Permitted Length Piping
L1+L2+L3+L4+L5+L6
+A+B+C+D+E
L1+L3+L4+L5+L6+E
Pipe Length
Maximum
Height
Difference
Total Piping Length (Actual) 328 ft. (100 m)
Actual Length
Maximum Piping Length
Equivalent Length
Pipe length (from the fi rst line branch pipe to farthest
indoor unit)
Pipe length (from the indoor unit to the nearest branch
pipe)
Indoor Unit to Outdoor Unit
Maximum Height Difference
Outdoor Unit Up 98.4 ft. (30 m) - - -
Outdoor Unit
Down
148 ft. (45 m) (VPA036-048)
196 ft. (60 m) (VPA060)
164 ft. (50 m) (VPA036-048)
230 ft. (70 m) (VPA060)
65.6 ft. (20 m) L3+L4+L5+L6+E
49.2 ft. (15 m) L2,A,B,C,D,E
65.6 ft. (20 m) - - -
Indoor Unit to Indoor Unit Maximum Height Difference 26.2 ft. (8 m) - - -
NOTE - Each branch pipe equals 20 in. (508 mm) equivalent straight pipe length.
16
Page 17
Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference - With Branch Box
NOTE - See Refrigerant Pipe Selection Table to size Main Outdoor Pipe.
Description Designation
Main Outdoor Pipe - from outdoor unit to branch box L1
Indoor Unit Pipe - from Branch Box(es) to indoor units A, B, C, D
Mini-VRF
Heat Pump
Outdoor unit
L1
NOTE - Branch Box(es) should be placed between the Outdoor Unit and Indoor Units.
Branch Boxes cannot be connected in series.
NOTE - In applications requiring more than one Branch Box,
call Lennox VRF Applications Department for assistance.
Branch Box
D
20m
≤
Maximum Height Difference
Outdoor Unit to Indoor Unit
AB
C
8m
≤
Maximum Height Difference
Indoor Unit to Indoor Unit
Indoor unit
Length and Maximum Height Difference Maximum Permitted Length Piping
Total Piping Length (Actual) 328 ft. (100 m) L1+A+B+C+D
148 ft. (45 m) (VPA036-048)
196 ft. (60 m) (VPA060)
164 ft. (50 m) (VPA036-048)
230 ft. (70 m) (VPA060)
L1+A, L1+B,
L1+C, L1+D
A, B, C, D
≤ 65.6 ft. (20 m) each
Pipe Length
Maximum
Height
Difference
Actual Length
Maximum Piping Length
Equivalent Length
Pipe length (from the Branch Box to each indoor unit) 65.6 ft. (20 m)
Indoor Unit to Outdoor Unit
Maximum Height Difference
Indoor Unit to Indoor Unit Maximum Height Difference 26.2 ft. (8 m) - - -
Outdoor Unit Up 65.6 ft. (20 m) - - -
Outdoor Unit Down 65.6 ft. (20 m) - - -
17
Page 18
Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference - With Branch Box
NOTE - See Refrigerant Pipe Selection Table to size Main Outdoor Pipe.
Description Designation
Main Outdoor Pipe - from outdoor unit to fi rst Branch Pipe L1
Mini-VRF
Heat Pump
Outdoor unit
Main Indoor Pipe - from Branch Pipe to each Branch
Box(es)
Indoor Unit Pipe - from Branch Box(es) to indoor units A, B, C, D, E, F
NOTE - Branch Box(es) should be placed between the Outdoor Unit and Indoor Units.
Branch Boxes cannot be connected in series.
NOTE - Refer to tables to ensure compliance with maximum piping distances.
L3, L4
Branch Box
F
E
L1
L3
Branch Box
L4
D
20m
≤
Maximum Height Difference
Outdoor Unit to Indoor Unit
AB
C
8m
≤
Maximum Height Difference
Indoor Unit to Indoor Unit
Indoor unit
Length and Maximum Height Difference Maximum Permitted Length Piping
Total Piping Length (Actual) 328 ft. (100 m) L1+A+B+C+D+E+F+L3+L4
Pipe Length
Maximum
Height
Difference
Maximum Piping Length
Pipe length from the fi rst Branch Pipe to each indoor
unit.
Indoor Unit to Outdoor Unit
Maximum Height Difference
Indoor Unit to Indoor Unit Maximum Height
Difference
Actual Length
Equivalent
Length
Outdoor Unit
Up
Outdoor Unit
Down
18
148 ft. (45 m) (VPA036-048)
196 ft. (60 m) (VPA060)
164 ft. (50 m) (VPA036-048)
230 ft. (70 m) (VPA060)
65.6 ft. (20 m)
65.6 ft. (20 m) - - -
65.6 ft. (20 m) - - -
26.2 ft. (8 m) - - -
L1+L4+A, L1+L4+B,
L1+L4+C, L1+L4+D,
L1+L3+E, L1+L3+F
L4+A, L4+B, L4+C, L4+D,
L3+E, L3+F
≤ 65.6 ft. (20 m) each
Page 19
Maximum Permitted Refrigerant Pipe Length and Maximum Height Difference - With Branch Box
NOTE - See Refrigerant Pipe Selection Table to size Main Outdoor Pipe.
Description Designation
Main Outdoor Pipe - from outdoor unit to fi rst Branch Pipe L1
Main Indoor Pipe - from Branch Pipe to each Branch
L3, L4, L5, L6
Box(es) or Branch Pipe
Indoor Unit Pipe - from Branch Box(es) to indoor units A, B, C, D, E, F. G. H
NOTE - Branch Box(es) should be placed between the Outdoor Unit and Indoor Units.
Mini-VRF
Heat Pump
Outdoor unit
Branch Boxes cannot be connected in series.
NOTE - Refer to tables to ensure compliance with maximum piping distances.
L3
Branch Box
H
E
Indoor Unit to Indoor Unit
L1
Maximum Height Difference
Outdoor Unit to Indoor Unit
L4
AB
L6
L5
Branch Box
Branch Box
F
D
C
Maximum Height Difference
Indoor unit
Length and Maximum Height Difference Maximum Permitted Length Piping
L1+A+B+C+D+E+F+G+
H+L3+L4+L5+L6
L1+L4+L6+A, L1+L4+L6+B,
L1+L4+L6+C, L1+L4+L6+D,
L1+L4+L5+E, L1+L4+L5+F,
L1+L3+H, L1+L3+G
Pipe Length
Total Piping Length (Actual) 328 ft. (100 m)
Actual
Length
Maximum Piping Length
Equivalent
Length
148 ft. (45 m) (VPA036-048)
196 ft. (60 m) (VPA060)
164 ft. (50 m) (VPA036-048)
230 ft. (70 m) (VPA060)
L4+L6+A, L4+L6+B, L4+L6+C,
Pipe length from the fi rst Branch Pipe to each
indoor unit.
65.6 ft. (20 m)
L4+L6+D, L4+L5+E, L4+L5+F,
L3+H, L3+G
≤ 65.6 ft. (20 m) each
Maximum
Height
Difference
Outdoor
Indoor Unit to Outdoor Unit
Maximum Height Difference
Unit Up
Outdoor
Unit Down
Indoor Unit to Indoor Unit Maximum Height
Difference
65.6 ft. (20 m) - - -
65.6 ft. (20 m) - - -
26.2 ft. (8 m) - - -
G
19
Page 20
Refrigerant Pipe Selection
MAIN OUTDOOR UNIT PIPE (L1) DIAMETER AND PIPE LENGTH BASED ON TOTAL CAPACITY
Model No. Capacity Liquid Pipe Length
Main
Gas Pipe
Diameter
Required
Main
Liquid Pipe
Diameter
Required
Maximum
Number of
Indoor Units
Total Capacity
of Indoor Units
Combination
Ratio Range
Less than 148 ft. (45 m) 5/8 in.
VPA036H4 3 Ton
3/8 in. 5 45 to 130%
More than 148 ft. (45 m) 3/4 in.
Less than 148 ft. (45 m) 5/8 in.
VPA048H4 4 Ton
3/8 in. 7 45 to 130%
More than 148 ft. (45 m) 3/4 in.
Less than 148 ft. (45 m) 3/4 in.
VPA060H4 5 Ton
3/8 in. 9 45 to 130%
More than 148 ft. (45 m) 7/8 in. V8IDBP02
NOTES:
Use appropriate reducer/adapter (not provided) at the outdoor unit pipe connections to meet the piping size requirements.
INDOOR MAIN PIPE SELECTION (L3, L4, L5, L6)
Downstream Indoor Unit
Gas Pipe Diameter Liquid Pipe Diameter Indoor Unit Branch Pipe
Capacity (Buth)
A < 56,700 5/8 in. 3/8 in. V8IDBP01
56,700 < A < 78,500 3/4 in. 3/8 in. V8IDBP01
Indoor Unit
Branch Pipe
V8IDBP01
V8IDBP01
INDOOR PIPE SELECTION (L2, A, B, C, D, E, F, G, H)
Indoor Unit Type Indoor Unit Size Gas Pipe Diameter Liquid Pipe Diameter
V22A Compact 360° Cassette 007, 009, 012, 015 1/2 in. 1/4 in.
009, 012, 015 1/2 in. 1/4 in.
V33A Standard/High Effi ciency 360°
Cassette
018, 024, 030,
5/8 in. 3/8 in.
036, 048
012, 015 1/2 in. 1/4 in.
VCFA Ceiling/Floor Mount Non-Ducted
018, 024, 030,
5/8 in. 3/8 in.
036, 048, 054
VHIA Concealed High Static Ducted 024, 030, 036, 048 5/8 in. 3/8 in.
007, 009, 012, 015 1/2 in. 1/4 in.
VMDA Concealed Medium Static Ducted
018, 024, 030,
5/8 in. 3/8 in.
036, 048
VVCA Vertical Air Handler
018, 024, 030,
036, 048, 054
5/8 in. 3/8 in.
007, 009, 012, 015 1/2 in. 1/4 in.
VWMA Wall-Mounted Non-Ducted
018, 024, 030 5/8 in. 3/8 in.
NOTES:
If the total capacity of the indoor units is greater than 100% of the capacity of the outdoor unit, individual indoor unit capacities will be reduced.
20
Page 21
• The seal on the unit refrigerant piping connections should remain in place until the last possible moment. This will prevent dust or water
from getting into the refrigerant piping before it
is connected.
• Flow the pipework with dry (oxygen-free) nitrogen (2.9 psig or 3 CFH) during brazing to avoid
oxidation which may block the refrigerant piping.
• Do not use anti-oxidants when brazing.
• Do not use fl ux when brazing copper-to-copper
piping. Use phosphor copper brazing fi ller alloy
(BCuP) which does not require fl ux. Flux has a
harmful effect on refrigerant pipe.
• Use a wet cloth to insulate the shut-off v alve during brazing.
• Use dedicated gauges and hoses with R-410A
equipment.
Pressure Test
• Follow the pressure test specifi cations in table 1
for pressure test.
• Use oxygen-free nitrogen to pressure test to 647
psig and hold for 1 hour.
Evacuate System
• Follow the Lennox pressure test specifi cations
in table 1 and the triple evacuation process described on this page to pressure test and evacuate the system.
• Use a vacuum pump capable of evacuating to
lower than 500 Microns (0.5 Torr).
• Do not open any of the outdoor unit shut-off
valves (possible max 5 valves). The outdoor unit
does not need to be evacuated.
• Evacuate the system to 500 Microns (0.5 Torr), or
below, for 4 hours.
12 3 4 5
66
1 - Refrigerant pipe
2 - Part to be brazed
3 - Reducer
4 - Isolation valve
5 - Pressure-regulating valve
6 - Oxygen-free nitrogen
IMPORTANT
Use only oxygen-free nitrogen (OFN).
Table 3. Pressure Test Specifi cations
1 3 bar 44 psig minimum of 10 minutes
2 15 bar 220 psig minimum of 10 minutes
3 32 bar 470 psig minimum of 10 minutes
4 44 bar 647 psig 1 hour. Stress test to
prove the integrity of the
complete installation.
5 32 bar 470 psig 24 hours. Lower system
pressure test, after
confi rmation No. 4 was
successfully completed.
Triple Evacuation Procedure
A Micron or Torr gauge must be used for this
procedure.
1. Discharge the oxygen-free nitrogen and evacuate
the system to a reading of 8000 Microns (8 Torr)
using all service valves.
2. Break the vacuum by allowing nitrogen into the
three inter-connecting pipework port connections
(low pressure gas pipe, high pressure gas pipe
and liquid line pipe) until a positive pressure is
achieved.
3. Evacuate the system to a reading of 5000
Microns (5 Torr).
4. Break the vacuum by allowing nitrogen into the
three inter-connecting pipework port connections
(low pressure gas pipe, high pressure gas pipe
and liquid line pipe) until a positive pressure is
achieved
5. Evacuate the system to a minimum reading of
500 Microns (0.5 Torr).
6. For a moisture free system, ensure the vacuum
is held without movement for a minimum of 4
hours.
7. If pressure loss is detected, carry out steps 2
through 6 until no pressure loss is observed.
Figure 21. Brazing Best Practices
21
Page 22
Additional Refrigerant Charge
When refrigerant piping connections have been
completed, it will be necessary to adjust the system
refrigerant charge based on the diameter and length
of the liquid line pipe between the outdoor and indoor
unit(s).
Table 4 lists the refrigerant piping sizes along with
the refrigerant adjustment required per foot of liquid
line pipe.
This system is suitable for use with R-410A
refrigerant only.
1. Calculate the additional refrigerant charge using
the diameter and length of the liquid pipe (only)
using Table 4 below.
2. Calculate the additional refrigerant charge for
each liquid line branch pipe kit.
3. If the ratio of VMDB or V33B Indoor unit capacity
exceeds 80% of all indoor units, use Table 5 to
determine the additional refrigerant charge to
add.
4. Total all calculations.
5. Add the calculated additional refrigerant to the
system.
Liquid Line Length Calculation
Calculate additional refrigerant charge using the diameter and length of the liquid pipe.
Table 4. Refrigerant Charge Adjustment
Liquid Line
Pipe Size
Additional Refrigerant Per Foot of
Pipe Length
1/4 in. 0.015 lb.
3/8 in. 0.040 lb.
1/2 in. 0.080 lb.
5/8 in. 0.120 lb.
3/4 in. 0.181 lb.
7/8 in. 0.255 lb.
Branch Pipe Kit Calculation
Add 1.60 ft. (488 mm) per EACH liquid line branch pipe (incoming pipe size only) for additional charge calculation.
Refrigerant Flow
Example: The branch pipe kit
has an incoming pipe size of 7/8”
and outgoing pipe sizes of 3/8”
and 5/8”. Use only the incoming
pipe size of 7/8” to calculate the
additional refrigerant charge for
this branch pipe kit.
Incoming Pipe
Only use this pipe size to
determine the amount of
additional refrigerant charge for
EACH liquid line branch pipe.
Table 5. VMDB or V33B Indoor Unit Capacity Ratio over 80% of All Indoor Units
Additional Charge Amount
Outdoor Unit
Module
Pounds of additional refrigerant
if ratio of VMDB Indoor units
exceeds 80% of all indoor units.
VPA036H4M-2P 1.76 2.64
VPA048H4M-2P 2.31 3.30
VPA060H4M-2P 2.75 3.30
Pounds of additional refrigerant
if ratio of V33B indoor units
exceeds 80% of all indoor units.
22
Page 23
Wiring Connections
WARNING
Isolate the power supply before accessing unit electrical
terminals.
Install unit so that unit disconnect is accessible.
Follow all local and national codes, as well as this
installation instruction, during installation. Do NOT
overload electrical circuit, as this may lead to failure
and possible fi re.
Use specifi ed wiring and cable to make electrical
connections. Clamp cables securely and make sure
that connections are tight to avoid strain on wiring.
Insecure wiring connections may result in equipment
failure and risk of fi re.
Wiring must be installed so that all cover plates can be
securely closed.
Do not attempt to repair a damaged power cord.
Do not modify the power cord in any way. Do not
attempt to extend the length of the power cord or use
an extension cord with this appliance. Do not share the
single power outlet with any other appliances.
In the U.S.A., wiring must conform with current local
codes and the current National Electric Code (NEC).
In Canada, wiring must conform with current local
codes and the current Canadian Electrical Code
(CEC).
Refer to unit nameplate for minimum circuit ampacity
and maximum overcurrent protection size.
NOTE - Three-conductor, stranded, shielded cable
must be used for the communication wiring. This is
necessary to ensure proper system communication
and operation.
NOTE - The outdoor unit requires a separate circuit
breaker and power supply.
CAUTION
This unit must be properly grounded and protected
by a circuit breaker. The ground wire for the unit must
not be connected to a gas or water pipe, a lightning
conductor or a telephone ground wire.
Do not connect power wires to the outdoor unit until
all other wiring and piping connections have been
completed.
Install all wiring at least 3 feet away from televisions,
radios or other electronic devices in order to avoid the
possibility of interference with the unit operation.
Do not install the unit near a lighting appliance that
includes a ballast. The ballast may affect remote
control operation.
Separate power wiring supplies must be provided for
the outdoor unit and indoor unit(s).
Do not cross-connect refrigerant piping or signal wires
between VRF systems. Each VRF system must be
piped and wired separately.
Each indoor unit must have its own electrical disconnect.
Do not run signal wire and power wire in the same
conduit; keep distance between the two conduits per
local codes. (Make sure to set address of outdoor unit
in case of parallel multi-outdoor units.
Take care when making fi nal power and control cable
connections. Cross connection will result in damage
to unit’s main board.
Only apply power to the system after performing all
of the pre-commissioning steps.
Power Terminal Strip
L1 L2
1. Select the appropriate electrical inlet into the
outdoor unit. Local and national codes apply.
2. Locate the terminal strip in the outdoor unit
control box. Connect the power wiring (sized per
NEC/CEC and local codes) and communications
cable (3-conductor, shielded cable) per Figure
22. Refer to unit nameplate for rated voltage.
IMPORTANT
DO NOT adjust DIP switch settings. Settings may only
be adjusted by a trained technician as part of the commissioning procedures.
NOTE - Use 18 GA 3-Conductor, Stranded,
Shielded Communication Cable
23
208/230V 60Hz 1Ph
Power Supply
Communication Terminal Strip
K1 K2 E O A X Y E P Q E H1 H2 E
Outdoor
Unit
Informa-
tion Circuit
To LVM,
BACnet, or
LON
system
To Pulse
Meter
Indoor
Unit
Informa-
tion
Circuit
To LVM,
BACnet,
or LON
system
System
Commu-
nication
Circuit
To
Indoor
Units
Figure 22. Wiring Terminals
Not Used
Page 24
4
1
2
5
3
NO .
12
13
14
15
16
17
18
19
FAN-TOP
FAN-BOTTOM
SV5
HEATER1
STF1
SV6
HEATER3
BLACK
GRAY
BLUE
BLACK
RED
CT1
SW3 Function Definition:
Heating priority mode
Factory default
Cooling priority mode
First running
priority mode
Only response to
heating mode
Only response to
cooling mode
3
3
MAIN BOARD
CT1
L1
L2
CODE
)TINUROODTUO(MARGAIDGNIRIW
POWER DRIVER
V
U
W
PARTNAME
BOARD
U
V
W
NO .
P
N
A3
A2
A1
0
Typical wiring diagram. Refer to wiring diagram on the unit for actual wiring.
TR
ORP-H
L-PRO
T5
T3
T4
VEE
Communition
CN6
ToIndoor unit
centralcontroller
CN8
ToIndoor unit
communication
(Reserved)
connection panel
Tooutdoor
Topulse meter
unitmonitor
Note: Use a 18 GA., stranded, 3-conductor, shielded
control wire and ensure the shielding layer is grounded.
ENC2 function definition
Outdoor unit network
address dial-up
Only 0-7 used
SW4 Function Definition:
Manually addressing
Factory default
Automatically addressing
Error Code For Outdoor Unit
Error description
Communication error between
indoor unit and outdoor unit
T3 or T4 errortemperature sensor
Power voltage out of range
DC Fan error
Compressor discharge temperature
sensor error
EEPROM error
EEPROM not match main chip
E.9.
DC fan error more than 5 minutes
in Heat mode (T3>24
2 times of E6 in 10 minutes
Hi-pressure switch trip
Low-pressure switch trip
Input current overload
High compressor discharge temperature
High condenser temperature
Fan output and feedback speed mismatch
High indoor coil temperature
High radiator temperature
(Reserved)
DC bus voltage less than 200V for 5S
Communication error between compressor
module and main board
3 times of L0 or L1 in 60 minutes
Compressor module error
DC bus low voltage
DC bus high voltage
Compressor MCE error
Low compressor speed
Compressor power out of phase
Compressor speed difference >15Hz
between adjacent 2 second
Compressor speed difference >15Hz
between the actual and the setting speed
Outdoor unit (heat pump)
Signal wire of
indoor/outdoor units
Figure 23. Typical Unit Wiring Diagram
PQE
Local
Controller
V0STAT54P-2
Indoor unit
Y
12V
QPE
X
18 GA., 3-conductor,
stranded, shielded control wire
(polarity sensitive)
Figure 24. Typical Low-Voltage Field Wiring
Local
Controller
V0STAT51P-2
Indoor unit
E
QPE
12V
E
Y
X
Indoor unit
QPE
Local
Controller
V0STAT54P-2
Y
12V
X
E
Cable Shield
(to ground)
24
Page 25
Incoming Electrical Supply
Power(208/230V 1PH 60Hz)
Incoming Electrical Supply
Outdoor unit
L2L1
J- Box
Power wire between indoor units
Figure 25. Typical 208/230V Power Wiring
Outdoor unit
Indoor unit
QP E
L2L1
Indoor unit
DE
C
BA
L2L1
J- Box
QP E
BACDE
Indoor unit
L2L1
J- Box
QP E
PQE
BA C DE
Refrigerant piping
(PQE)
Ground cable shield
DO NOT connect to E
P Q
Install a terminating resistor at the last indoor unit (terminals P and Q) of the daisy chain.
All shields of shielded cable connect to GROUND terminal, not to E.
18 GA., stranded, 3-conductor, shielded control wire (polarity sensitive).
Typical Wiring Diagram, NEC/CEC and Local Codes apply.
Figure 26. Typical Communication Wiring
25
Page 26
Outdoor unit
Branch box
Note: Branch box does not require
power or communication wiring
(PQE)
Refrigerant piping
Ground cable shield
DO NOT connect to E
P Q
Install a terminating resistor at the last indoor unit (terminals P and Q) of the daisy chain.
All shields of shielded cable connect to GROUND terminal, not to E.
18 GA., stranded, 3-conductor, shielded control w ire (polarity sensitive).
Typical Wiring Diagram, NEC/CEC and Local Codes apply.
Figure 27. Typical Communication Wiring
Outdoor unit
Refrigerant piping
NOTE - Branch box does not require
power or communication wiring
(PQE)
Ground cable shield
DO NOT connect to E
P Q
Install a terminating resistor at the last indoor unit (terminals P and Q) of the daisy chain.
Branch box
Refrigerant
piping
Branch box
All shields of shielded cable connect to GROUND terminal, not to E.
18 GA., stranded, 3-conductor, shielded control w ire (polarity sensitive).
Typical Wiring Diagram, NEC/CEC and Local Codes apply.
Figure 28. Typical Communication Wiring
26
Page 27
Outdoor unit
Refrigerant piping
Branch box
(PQE)
Ground cable shield
DO NOT connect to E
P Q
Install a terminating resistor at the last indoor unit (terminals P and Q) of the daisy chain.
All shields of shielded cable connect to GROUND terminal, not to E.
18 GA., stranded, 3-conductor, shielded control wire (polarity sensitive).
Typical Wiring Diagram, NEC/CEC and Local Codes apply.
Figure 29. Typical Communication Wiring
Network Address and Commissioning
After the system has been installed, the outdoor unit
will automatically assign addresses to all connected
indoor units. These addresses may be modifi ed
using an optional remote control as part of the
commissioning procedure.
NOTE - Branch box does not require
power or communication wiring
Branch box
Refrigerant
piping
Branch box
DIP switch 1 on SW-4 on the outdoor unit main
control is factory-set to ON.
27
Page 28
SW2 Query Instructions
No**. Parameter description Parameter value*
0 Normal display
1 Operating mode (0 - off, 2 - cooling, 3 - heating, 4 - forced cooling)
2 Operating fan speed 1 through 7, 0 - stop
The total capacity requirements of the
3
indoor unit
The capacity requirement of the revised
4
external unit
5 T3 (Condenser temperature) Actual value in C
6 T4 (Outdoor ambient temperature) Actual value in C
T5 (Compressor discharge
7
temperature)
8 Reserved Reserved
9 Opening of EEV Actual value*8P
10 Unit current Amps
11 1/10 of DC bus voltage
T2/T2B average temperature
12
T2 - Heat/T2B Cooling
13 Total number of the indoor units
14 Number of the operating indoor unit Number of IDUs calling for certain mode
15 Model code 10 - 3 Ton; 14 - 4 Ton; 17 - 5 Ton
16 Priority mode
Version of the fi rmware
17
The last fault or protection code
18
19 --
If all indoor units off, it will show the quantity of all indoor units; if the outdoor
unit is in time delay, it will show 0; if the outdoor unit is running, it will show
compressor speed.
This number is related to indoor capacity (Horsepower) and indoor room
temperature and setpoint.
This is a number revised by outdoor ambient temperature based on the previous
number No. 3
If T5>99, it will only show the front two digits of the actual temperature. For
example, it will show "10." when T5 is 105.
(When system operates cooling, it shows T2B; when system operates heating, it
shows T2.)
T2 and T2B Average Operating IDU Coil Temp sensor In degrees C
0 - Heating priority; 1 - Cooling priority; 2 - First running priority ; 3 - Heating only;
4 - Cooling only
End
* Units of temperature are shown as °C, units of pressure are shown as MPa.
** No refers to number of presses of SW2 button.
Figure 30. SW2 Spot Check Query
28
Loading...