Blue Ridge BM18M23C User manual

Multi Zone Outdoor
Installation Manual
IMPORTANT NOTE:
• Read this manual carefully before installing
or operating your new air conditioning unit.
Make sure to save this manual for future
reference.
• This manual only describes the installation
of outdoor unit. When installing the indoor
unit, refer to the installation manual of
indoor unit.

Table of Contents
Installation Manual
Safety Precautions.................................04
Accessories..................................................05
Installation Overview...........................06
Specications ............................................07
Outdoor Unit Installation ........................... 08
1
5
2
3
4

LN
MC MC
Refrigerant Piping Connection.........................11
Test Run .................................................................. 22
Using the Automatic Wiring/Piping
Correction Function....................................... 23
Wiring.................................................. 14
Wiring Diagrams.............................. 16
Refrigerant Handling.....................................19
Procedure.................................................................19
Refrigerant chart ...................................................21
Adding refrigerant ................................................21
6
9
10
7
8

Revised 5/14/2020
1
WARNING
WARNING
Page 4 
Safety Precautions
Read Safety Precautions Before Installation
Incorrect installation due to ignoring instructions can cause serious damage or injury.
The seriousness of potential damage or injuries is classied as either a WARNING or CAUTION.
Failure to observe a warning may result in death. The appliance must be installed in
accordance with national regulations.
Failure to observe a caution may result in injury or equipment damage.
This symbol indicates that you must never perform the action indicated.
1. Carefully read the Safety Precautions before installation.
2. For commercial applications, such as restaurant kitchens, server rooms, etc., the use of
specially designed air-conditioning units is highly recommended.
3. Only trained and certied technicians should install, repair and service this air conditioning
unit.
4. Improper installation may result in electrical shock, short circuit, leaks, re or other damage
to the equipment and personal property.
5. Strictly follow the installation instructions set forth in this manual.
6. Before you install the unit, consider strong winds, typhoons and earthquakes that might
aect your unit and locate it accordingly.
7. Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacturer.
8. This appliance is not intended for use by persons (including children) with reduced physical,
sensory or mental capabilities or lack of experience and knowledge, unless they have been
given supervision or instruction concerning use of the appliance by a person responsible for
their safety.
9. Children should be supervised to ensure that they do not play with the appliance.
10. An all-pole disconnect device must be incorporated in the high voltage wiring in accordance
with local and national electrical codes.
11. Any person who is involved with working on a refrigerant circuit should hold a current valid
certicate from an industry-accredited assessment authority.
12. Servicing shall only be performed as recommended by the equipment manufacturer.
13. Maintenance and repair should be carried out by qualied personnel.
14. Keep ventilation openings clear of obstruction.
15. Do not turn on the power until all work has been completed.
16. When moving or relocating the air conditioner, consult experienced service technicians for
disconnection and reinstallation of the unit.
CAUTION

Revised 5/14/2020
2
Optional Accessories
Page 5 
Accessories
The air conditioning system comes with the following accessories. Use all of the installation parts and
accessories to install the air conditioner. Improper installation may result in water leakage, electrical
shock and re, or equipment failure.
There are two types of remote controls: wired and wireless.
Select a remote controller based on customer preferences and requirements and install in an
appropriate place.
Refer to catalogues and technical literature for guidance on selecting a suitable remote
controller.
Name Shape Quantity
Installation plate 1
Plastic expansion sheath 5-8
(depending on models)
Self-Tapping Screw A ST 3.9X25 5-8
(depending on models)
Drain joint (some models) 1
Seal ring (some models) 1
Insulated copper
refrigerant lines
Liquid side
1/4”
Parts you must purchase.
Consult a technician for
the proper size.
3/8”
Gas side
3/8”
1/2”
5/8”
Owner’s manual 1
Installation manual 1
Refrigerant line adapter (packed with the indoor
or outdoor unit, depending on models)
NOTE: Pipe size may dier from appliance to
appliance. To meet dierent pipe size
requirements, sometimes the pipe connections
need an adapter installed on the outdoor unit .
Optional part
(1-5 pieces for outdoor
unit, depending on
models)

Revised 5/14/2020
3
1 2 3
456
Installation Overview
Installation
Overview
INSTALLATION ORDER
MC MC
LN
Install the indoor unit
(separate manual)
Install the outdoor unit
(Page 09)
Connect the refrigerant
pipes (Page 12)
Connect the wires
(Page 14)
Perform a test run
(Page 24)
Evacuate the
refrigeration system
(Page 21)
Page 6 

Revised 5/14/2020
Specications
4
Specications
Table 5.1
Number of units that can be used
together Connected units 1-5 units depending on model
Compressor stop/start frequency Stop time 3 min or more
Power source voltage
voltage uctuation within ±10% of rated voltage
voltage drop during start within ±15% of rated voltage
interval unbalance within ±3% of rated voltage
Table 5.2 Unit: feet.
2 Zone 3 Zone 4 Zone 5 Zone
Max. length for all rooms 131’ 197’ 262’ 262’
Max. length for one indoor unit 82’ 98’ 115’ 115’
Max. height dierent between indoor and outdoor unit 49’ 49’ 49’ 49’
Max. height dierent between indoor units 33’ 33’ 33’ 33’
Min. length 10’ per
zone
10’ per
zone
10’ per
zone
10’ per
zone
Page 7 
When installing multiple indoor units with a single outdoor unit, ensure that the length of the
refrigerant pipe and the drop height between the indoor and outdoor units meet the requirements
illustrated in the following diagram:
Indoor unit
Indoor unit
Indoor unit
Outdoor unit

Revised 5/14/2020
5
Outdoor Unit Installation
Outdoor Unit Installation Instructions
Outdoor Unit
Installation
Page 8 
Step 1: Select installation location.
The outdoor unit should be installed in the
location that meets the following requirements:
Place the outdoor unit as close to the indoor
unit as possible.
Ensure that there is enough room for
installation and maintenance.
The air inlet and outlet must not be
obstructed or exposed to strong wind.
Ensure the location of the unit will not be
subject to snowdrifts, accumulation of
leaves or other seasonal debris. If possible,
provide an awning for the unit that does not
obstruct airow or maintenance access.
The installation area must be dry and well
ventilated.
There must be enough room to install the
connecting pipes and cables and to access
them for maintenance.
Step 2: Install outdoor unit.
Fix the outdoor unit with anchor bolts (M10)
The area must be free of combustible gases
and chemicals.
The pipe length between the outdoor and
indoor unit may not exceed the maximum
allowable pipe length.
If possible, avoid installing the unit where
it is exposed to direct sunlight.
If possible, make sure the unit is located far
away from your neighbors’ property so that
the noise from the unit will not disturb them.
If the location is exposed to strong winds
(for example: near a seaside), the unit must
be placed against the wall to shelter it from
the wind. If necessary, use an awning with at
least 18” of clearance.
(See Fig. 6.1 & 6.2)
Install the indoor and outdoor units, cables
and wires at least 3 feet from televisions or
radios to prevent static or image distortion.
Depending on the radio waves, 3 feet may
not be enough to eliminate all interference.
Strong wind
Strong wind
Strong wind
>24”
Fix with bolts
CAUTION
• Be sure to remove any obstacles
that may block air circulation.
• Make sure you refer to Length
Specications (Table 5.2) to
ensure there is enough room for
installation and maintenance.
Fig 6.3
Fig 6.1
Fig 6.2

Revised 5/14/2020
Outdoor Unit
Installation
Page 9 
Outdoor Units Table 6.1:
BM18M23C, BM27M23C, BM36M23C,
BMHH18M22C, BMHH27M22C
BMHH36M22C, BM48M22C, BMHH48M22C
Multiple Outdoor Unit
installation clearance requirements
Top View All Condensers
(A, B = mount point dimensions)
W
H
W
H
A
B
D
10 feet or more
2 feet or more
5 feet
or more
10 inches or more
Model W D H A B
BM18M23C 33.27" 14.29" 27.64" 21.3" 13.8"
BM27M23C 37.2" 16.5" 31.9" 26.5" 15.9"
BM36M23C 37.2" 16.5" 31.9" 26.5" 15.9"
BM48M22C 37.5" 16.3" 52.5" 25" 15.9"
BMHH18M22C 37.2" 16.5" 31.9" 26.5" 15.9"
BMHH27M22C 37.2" 16.5" 31.9" 26.5" 15.9"
BMHH36M22C 37.5" 16.3" 52.5" 25" 15.9"
BMHH48M22C 37.5" 16.3" 52.5" 25" 15.9"

Revised 5/14/2020
NOTE: Be sure to maintain minimum clearanc-
es for optimum operation as shown below.
NOTE: Heat insulating tape should be used
on the drain joint to prevent freezing in colder
climates.
Drain Joint Installation (optional)
M
N
P
” from back wall
” on right
above
” on left
78” in front
Note: Drain joint will require additional clearance beneath the unit.
Condensation drains under the unit without installing the drain joint.
Outdoor Unit
Installation
Page 10 
1. Fit the rubber seal on the end of the drain joint
that will connect to the outdoor unit.
2. Insert the drain joint into the hole in the bas
pan of the unit.
3. Rotate the drain joint 90° until it clicks in place
facing the front of the unit.
4. Connect a drain hose extension (not included
to the drain joint to redirect water from the
unit during heating mode.
If the drain joint doesn’t come with a rubber seal
(see Fig. 6 .9 - B ), do the following:
1. Insert the drain joint into the hole in the bas
pan of the unit. The drain joint will click in
place.
2. Connect a drain hose extension (not included)
to the drain joint to redirect water from the
unit during heating mode.
You must drill a hole in the wall for the refriger-
ant piping, and the signal cable that will connect
the indoor and outdoor units.
1. Determine the location of the wall hole based
on the location of the outdoor unit.
2. Using a 2.5” hole bit, drill a hole in the wall.
3. Place the protective wall cu in the hole. This
protects the edges of the hole and helps seal
it when you nish the installation process.
The 24K indoor unit can only be connected with
a 36k or 48k condenser due to refrigerant pipe
diameter. Use connection A on the 36k and
connections A&B on the 48k. (See Fig. 6.10)
Fig 6.8
Fig 6.9 Fig 6.10
Seal
Drain joint
(A) (B)
Base pan hole of
outdoor unit
Seal
Notes On Drilling Hole In Wall
Note: 24K Indoor Units Only
NOTE: When drilling the wall hole, make sure
to avoid wires, plumbing, and other sensitive
components.
Table 6.3: Refrigerant line size multizone
air handlers (unit: inch)
Indoor Unit capacity
(Btu/h) Liquid Gas
9K 1/4" 3/8"
12K/18K 1/4" 1/2"
24K 3/8" 5/8"

Revised 5/14/2020
6
Refrigerant Piping Connection
Safety Precautions
Refrigerant Piping Connection Instructions
Refrigerant Piping
Connection
Page 11 
WARNING
• All eld piping must be completed by
a licensed technician and must comply
with the local and national regulations.
• When the air conditioner is installed
in a small room, measures must
be taken to prevent the refrigerant
concentration in the room from
exceeding the safety limit in the event
of refrigerant leakage. If the refrigerant
leaks and its concentration exceeds
its proper limit, hazards due to lack of
oxygen may result.
• When installing the refrigeration
system, ensure that air, dust, moisture
or foreign substances do not enter
the refrigerant circuit. Contamination
in the system may cause poor
operating capacity, high pressure in the
refrigeration cycle, explosion or injury.
• Ventilate the area immediately if
there is refrigerant leakage during the
installation. Leaked refrigerant gas
is both toxic and ammable. Ensure
there is no refrigerant leakage after
completing the installation work.
Step1: Cut pipes.
When preparing refrigerant pipes, take extra care
to cut and are them properly. This will ensure
ecient operation and minimize the need for
future maintenance.
1. Measure the distance between the indoor and
outdoor units.
2. Using a pipe cutter, cut the pipe a little longer
than the measured distance.
Step 2: Remove burrs.
Burrs can aect the air-tight seal of refrigerant
piping connection. They must be completely
removed.
1. Hold the pipe at a downward angle to prevent
burrs from falling into the pipe.
2. Using a reamer or deburring tool, remove all
burrs from the cut section of the pipe.
1. Make sure that the pipe is cut at a perfect
90° angle. Refer to Fig. 7.1 for examples of
bad cuts.
Oblique Rough Warped
90
°
CAUTION
• The branching pipe must be installed
horizontally. An angle of more than 10°
may cause malfunction.
• DO NOT install the connecting pipe
until both indoor and outdoor units
have been installed.
• Insulate both the gas and liquid piping
to prevent condensation.
CAUTION
DO NOT deform pipe while cutting. Be extra
careful not to damage, dent, or deform
the pipe while cutting. This will drastically
reduce the heating eciency of the unit.

Revised 5/14/2020
Refrigerant Piping
Connection
Page 12 
Table 7.1: Torque chart and aring guide
Pipe
Reamer
Point down
Fig 7.2
Fig 7.5
Step 3: Flare pipe ends.
Proper aring is essential to achieve an airtight
seal.
1. After removing burrs from cut pipe, seal
the ends with PVC tape to prevent foreign
materials from entering the pipe.
2. Sheath the pipe with insulating material.
3. Place are nuts on both ends of pipe. Make
sure they are facing in the right direction,
because you can’t put them on or change
their direction after aring. See Fig. 7.3.
4. Remove PVC tape from ends of pipe when
ready to perform aring work.
5. Clamp are form on the end of the pipe. The
end of the pipe must extend beyond the are
form.
6. Place aring tool onto the form.
7. Turn the handle of the aring tool clockwise
until the pipe is fully ared. Flare the pipe in
accordance with the dimensions shown in
table 7.1.
Step 4: Connect pipes.
Connect the copper pipes to the indoor unit rst,
then connect it to the outdoor unit. You should
rst connect the low-pressure pipe, then the
high-pressure pipe.
1. When connecting the are nuts, apply a thin
coat of refrigeration oil or approved refrigerant
sealant to the ared ends of the pipes.
2. Align the center of the two pipes that you will
connect.
3. Tighten the are nut as tightly as possible by
hand.
4. Using a spanner, grip the nut on the unit
tubing.
5. While rmly gripping the nut, use a torque
wrench to tighten the are nut according to
the torque values in Torque Requirements
below. Tighten once, loosen slightly, then
tighten again.
8. Remove the aring tool and are form, then
inspect the end of the pipe for cracks and
even aring.
Fig 7.3
Flare nut
Copper pipe
Fig 7.4
Flare for
m
Pipe
Pipe
gauge
Flaring
torque
Flare dimension
(A) (Unit: Inch)
Flare shape
Min. Max.
1/4" 14 ft/ lbs 0.33 0.34
3/8" 18 ft/ lbs 0.52 0.53
1/2" 26 ft/ lbs 0.64 0.65
5/8" 34 ft/ lbs 0.76 0.78
R0.4~0.8
45 °±2
90 °
±4
A
Fig 7.6
Indoor unit tubing Flare nut Pipe

Revised 5/14/2020
NOTE: DO NOT intertwine signal cable with
other wires. While bundling these items
together, do not intertwine or cross the signal
cable with any other wiring.
Refrigerant Piping
Connection
Page 13 
Fig 7.8
Torque Requirements
Outer Diameter of Pipe (inch) Tightening Torque (ft/lb) Add. Tightening Torque (ft/lb)
1/4" 11 ft/ lb 11.8 ft/ lb
3/8" 18.4 ft/ lb 19.18 ft/ lb
1/2" 25.8 ft/ lb 26.55 ft/ lb
5/8" 33.19 ft/ lb 34.67 ft/ lb
NOTE: Use both a spanner and a torque
wrench when connecting or disconnecting
pipes to/from the unit.
NOTE ON MINIMUM BEND RADIUS
Carefully bend the tubing in the middle
according to the diagram below. DO NOT
bend the tubing more than 90° or more
than 3 times.
Bend the pipe with thumb
min-radius 3.9”
6. After connecting the copper pipes to the
indoor unit, wrap the power cable, signal
cable and the piping together with binding
tape.
7. Thread this pipeline through the wall and
connect it to the outdoor unit.
8. Insulate all the piping, including the valves of
the outdoor unit.
Fig 7.7
CAUTION
• Fully wrap insulation around the piping.
Direct contact with the bare piping may
result in burns or frostbite.
• Make sure the pipe is properly
connected. Over tightening may
damage the bell mouth and under
tightening may lead to leakage.

Revised 5/14/2020
7
Wiring
Safety Precautions
Outdoor Unit Wiring
WARNING
• Be sure to disconnect the power supply
before working on the unit.
• All electrical wiring must be done
according to local and national
regulations.
• Electrical wiring must be done by
a qualied technician. Improper
connections may cause electrical
malfunction, injury and re.
• An independent circuit and single outlet
must be used for this unit.
DO NOT plug another appliance or
charger into the same outlet. If the
electrical circuit capacity is not enough
or there is a defect in the electrical
work, it can lead to shock, re, unit and
property damage.
• Connect the power cable to the
terminals and fasten it with a clamp. An
insecure connection may cause re.
• Make sure that all wiring is done
correctly and the control board cover is
properly installed. Failure to do so can
cause overheating at the connection
points, re, and electrical shock.
• Ensure that main supply connection
is made through a switch that
disconnects all poles, with contact gap
of a least 3mm (0.118”).
• DO NOT modify the length of the
power cord or use an extension cord. WARNING
Before performing any electrical or wiring work,
turn o the main power to the system.
TAKE NOTE OF FUSE SPECIFICATIONS
The air conditioner’s circuit board(PCB) is
designed with a fuse to provide overcurrent
protection. The specications of the fuse are
printed on the circuit board, such as:
Outdoor unit: T20A/250VAC (for
<24000Btu/h unit), T30A/250VAC (for
>24000Btu/h unit)
Wiring
CAUTION
• Connect the outdoor wires before
connecting the indoor wires.
• Make sure you ground the unit. The
grounding wire should be away from
gas pipes, water pipes, lightning rods,
telephone or other grounding wires.
Improper grounding may cause electrical
shock.
• DO NOT connect the unit with the power
source until all wiring and piping is
completed.
• Make sure that you do not cross
your electrical wiring with your signal
wiring, as this can cause distortion and
interference.
Page 14 
NOTE: The fuse is made of ceramic.

Revised 5/14/2020
NOTE: Gauge shown in Table 8.1 is for 50' run
or less. For longer runs, consult an electrician.
NOTE: While connecting the wires, please
strictly follow the wiring diagram (found inside
the electrical box cover).
Follow these instructions to prevent distortion
when the compressor starts:
• The unit must be connected to the main out-
let. Normally, the power supply must have a
low output impedance of 32 ohms.
• No other equipment should be connected to
the same power circuit.
• The unit’s power information can be found on
the rating sticker on the product.
1. Prepare the cable for connection
a. You must rst choose the right gauge wire
before preparing it for connection.
b. Refer to the table above for 50 foot and
under. For over 50 foot runs, consult an
electrician.
c. Using wire strippers, strip the rubber jack-
et from both ends of signal cable to reveal
about 6” of wire.
d. Strip the insulation from the ends of the
wires.
e. Using a wire crimper, crimp u-lugs on the
ends of the wires.
2. Remove the electric cover of the outdoor
unit. If there is no cover on the outdoor
unit, disassemble the bolts from the main-
tenance board and remove the protection
board. (See Fig. 8.1)
Wiring
Cover
Screw
3. Connect the u-lugs to the terminals Match
the wire colors/labels with the labels on
the terminal block, and rmly screw the
u-lug of each wire to its corresponding
terminal.
4. Clamp down the cable with designated
cable clamp.
5. Insulate unused wires with electrical tape.
Keep them away from any electrical or
metal parts.
6. Reinstall the cover of the electric control
box.
Page 15 
Table 8.1: Wire Gauge/ Amperage chart
Rated Current of
Appliance (A) Wire Gauge
13 - 18 14
18 - 25 12
25 - 30 10
30 - 50 8 Fig 8.1

Revised 5/14/2020
Wiring Diagrams
CAUTION
Connect the connective cables to the terminals, as identied, with their matching numbers on
the terminal block of the indoor and outdoor units. For example, in the US models shown in the
following diagram, Terminal 1(A) of the outdoor unit must connect with terminal 1 on the indoor
unit.
NOTE: Refer to the following gures if end-users wish to perform their own wiring.
Run the main power cord through the lower line-outlet of the cord clamp.
____ This symbol indicates eld wiring.
Wiring
TO A
1 2 3
TO B
1 2 3
L1 L2 1 (A)2(A) 3 (A)1(B)2(B)3(B)
POWER
Right
Ground
L1 L2 1 (A) 2 (A) 3 (A)1(B) 2 (B) 3 (B)
TO A
1 2 3
TO B
1 2 3
POWER
Wrong
Ground
L1 L2 1 (A) 2 (A) 3 (A)1(B) 2 (B) 3 (B)
TO A
1 2 3
TO B
POWER
1 2 3
Ground
Wrong
Page 16 
BM18M two zone condenser:
TO A
1 2 3
D
D
C
C
B
B
A
A
L1 L2 1(A)2(A) 3 (A)1(B)2(B)3(B)
L1 L2 1 (A)2(A) 3 (A)1(B)2(B)3(B)
TO B
1 2 3
POWER
L1 L2 1 (A)2(A) 3 (A)1(B)2(B)3(B)
Ground

Revised 5/14/2020
Wiring
TO A
1 2 3
TO B
1 2 3
TO C
1 2 3
1(B)2(B)3(B)1(C)2(C)3(C)
L1 L2 1(A)2(A)3(A)
1 (B)2(B)3(B)1(C)2(C)3(C)
L1 L2 1 (A)2(A)3(A)
1 (B) 2 (B)3(B)1(C) 2 (C)3(C)
L1 L2 1 (A) 2(A) 3 (A)
Ground POWER
TO A
1 2 3
TO B
1 2 3
TO C
1 2 3
TO D
1 2 3
1(B)2(B) 3 (B)1(C)2(C)3(C)1(D)2(D)3(D)
L1 L2 1(A)2(A)3(A)
1 (B)2(B)3(B)1(C)2(C)3(C)1(D)2(D)3(D)
L1 L2 1 (A)2(A)3(A)
1 (B)2(B)3(B)1(C)2(C)3(C)1(D)2(D)3(D)
L1 L2 1 (A)2(A)3(A)
POWER
Ground
Page 17 
BM27M three zone condenser
BM36M four zone condenser

Revised 5/14/2020
Wiring
TO E
1 2 3
TO C
1 2 3
TO D
1 2 3
TO A
1 2 3
TO B
1 2 3
Ground POWER
1 (A) 2 (A) 3 (A) 1 (B) 2 (B) 3 (B)
1 (C) 2 (C) 3 (C) 1 (D) 2 (D) 3 (D) 1 (E) 2 (E) 3 (E)
L1 L2
Page 18 
BM48M ve zone condenser

Revised 5/14/2020
CAUTION
After conrmation of the above conditions, follow these guidelines when performing wiring:
• Always have an individual power circuit specically for the air conditioner.
• Always follow the circuit diagram posted on the inside of the control cover.
• Screws fastening the wiring in the casing of electrical ttings may come loose during
transportation. Because loose screws may cause wire burn-out, check that the screws are
tightly fastened.
• Check the specications for the power source.
• Conrm that electrical capacity is sucient.
• Conrm that starting voltage is maintained at more than 90 percent of the rated voltage
marked on the name plate.
• Conrm that the cable thickness is as specied in the power source specications.
• Always install an earth leakage circuit breaker in wet or moist areas.
• The following can be caused by a drop in voltage: vibration of a magnetic switch, damaging
the contact point, broken fuses, and disturbance of normal functioning.
• An electrical disconnect from a power supply must be incorporated into the xed wiring. It
must have an air gap contact separation of at least 3mm in each active (phase) conductors.
• Before accessing terminals, all supply circuits must be disconnected.
Wiring
Page 19 

Revised 5/14/2020
Air Evacuation
8
Refrigerant handling:
Leak Test, Evacuation, and Refrigerant Charging
Tools needed:
Procedure:
1. Open King valves (see Fig. 9.1) Open both
King Valves fully until you hit the stopper.
Do not force.
2. Connect gauges Connect low pressure mani-
fold gauge hose to mini-split adapter; connect
mini-split adapter to low pressure lineset
valve A (see Fig. 9.2).
• Dry nitrogen tank and regulator
• R410a manifold gauge set
• 1/4" to 5/16" mini-split gauge adapter
(yellowjacket)
• Soap bubble solution sprayer
• Micron gauge
• Vacuum pump
3. Pressure test Connect nitrogen tank regu-
lator to charging hose on manifold gauges.
Pressurize lineset to 200 psi of dry nitrogen.
4. Check for leaks Spray soap bubbles on t-
tings at outdoor and indoor units to check for
bubbles/ leaks. If leaks are present, retorque
are nut. If leak is still present, release nitro-
gen, inspect and re-work are. Repeat. Once
there are no leaks, proceed to step 6.
5. Discharge nitrogen pressure from lineset A
and disconnect nitrogen tank.
6. Evacuate lines Connect micron gauge and
vaccum pump to the line valve A as shown in
Fig. 9.2.
7. Vacuum lineset to below 500 microns. Once
micron gauge slows to a stop (usually 200 -
400 microns) , close manifold valve and turn
o vacuum pump.
Manifold Gauge
Compound gauge
-76cmHg
Low pressure valve
Charge hose
High pressure valve
Charge hose
Vacuum pump
Pressure gauge
Low pressure valve
Page 20 
Fig 9.1
Fig 9.2