INSTALLATION, OPERATION
& MAINTENANCE MANUAL
VMH 09/12/18/24 SD
Inverter Single Zone
Ductless Mini-Split
Heat Controller • 1900 Wellworth Ave. • Jackson, MI 49203 • (517)787-2100 • www.heatcontroller.com
VMH 09/12/18/24 SD Inverter Mini-Split Heat Controller
TABLE OF CONTENTS
Safety Precautions
Warnings and Cautions ....................................................................................................... 3
Installation Instructions
Installation Location Selection ..........................................................................................4-5
Accessories ......................................................................................................................... 6
Indoor unit installation .......................................................................................................7-8
Outdoor unit installation ....................................................................................................... 9
Refrigerant Pipe Connection
Refrigerant line set installation .......................................................................................... 10
Leak test, evaluation and release of refrigerant ................................................................ 11
Electrical Work
Electrical Precautions ........................................................................................................ 11
Unit wiring .......................................................................................................................... 12
Initial Start Up and Checks
Indoor/outdoor communictation cable ............................................................................... 13
Outdoor power/communication wiring ............................................................................... 14
Field charging and nal inspection .................................................................................... 15
!
Caution
• Contact an authorized service technician for repair or maintenance of this unit
• Contact an authorized installed for installation of this unit.
• Installation work must be performed in accordance with local and national electrical codes and
standards by authorized personnel only
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Heat Controller VMH 09/12/18/24 SD Inverter Mini-Split
• Read the follow SAFETY PRECAUTIONS carefully before installation.
• Electrical work must be performed by a licensed electrician. Be sure to use the correct rating of the power
cord and main circuit for the model to be installed.
• Incorrect installation due to ignoring the instruction will cause harm or damage.
n The seriousness is classied by the following indications.
WARNING!
!
CAUTION!
!
The items to be followed are classied by the symbols:
This symbol indicates the possibility of death or serious injury.
This symbol indicates the possibility of injury or damage to property.
This symbol denotes item that is PROHIBITED from doing.
WARNING!
!
1) Do not install without an authorized servicer/installer.
2) Install according to this installation instruction. If installation is defective, it can cause water leakage, or
electrical shock/re.
3) Use the supplied accessories and specied parts for installation.
4) Install the indoor unit on a wall strong enough to hold the unit’s weight. Install the outdoor unit on a
raised concrete pad or blocks to provide a solid, level foundation. In a location with high winds, anchor
the unit and provide an air bafe. In snowy areas (for heat pump models), install the outdoor unit on a
raised platform higher than drifting snow. Provide snow vents.
5) For electrical work, follow local and national electric codes and these installation instructions. An
independent circuit and single outlet must be used. If electrical circuit capacity is not enough or defects
are found in electrical work, it will cause electrical shock or re.
6) Use the specied cable and connect tightly. Clamp the cable so that no external force will stress the
connections. Loose wiring may overheat at the connection points and create a possible re hazard.
7) Wiring routing must be properly arranged so that control board cover is xed properly. If control board
cover is not xed perfectly, it will cause overheating at connection point of terminal, re or electrical shock.
8) When charging the unit, take care not to let air/substances other than the specied refrigerant
go into refrigeration cycle. Otherwise, it will cause lower capacity, abnormal high pressure in the
refrigeration cycle, explosion and injury.
9) Do not modify the length of the power supply cord or use an extension cord, and do not share
the single outlet with other electrical appliances. Otherwise, it will cause re or electrical shock.
CAUTION!
!
1) This equipment must be grounded It may cause electrical shock if grounding work doesn’t comply with
local/national electric codes.
2) Do not install the unit at place where leakage of ammable gas may occur. If gas leaks and
accumulates near the unit, it may cause re.
3) Carry out drainage piping as mentioned in installation instructions. If not done correctly, water may
enter the room and damage personal belongings.
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VMH 09/12/18/24 SD Inverter Mini-Split Heat Controller
Selecting installation place
Choose a location that places the outdoor unit as close to the indoor unit as
possible. The maximum unit separation and vertical lift (compressor above the
evaporator) must be taking into account. Do not exceed allowable refrigerant
line lengths.
Indoor unit
• Unit must be installed in a location that does not obstruct the ow of air
and ensures clearances are maintained. (Fig. 1)
• The site must support the weight of the unit.
• The site must be easily accessible for cleaning or replacement of the air
lter, maintenance and service.
• The indoor unit should be mounted as high up on the wall toward the
ceiling, leaving a minimum of 6” (150mm) of space between the ceiling
and the top of the indoor unit. (Fig. 1)
• Due to the possibility of electronic interference with other devices, it is
recommended that there should be at least to 3 ft (1 meter) between the
unit and other devices/appliances such as televisions or radios.
• The unit should be installed away from possible exposure to re, smoke,
of ammable gases and be protected from direct sunlight (sunlight can
interfere with the signal between the unit and the remote controller.
Outdoor unit
• If installation location allows the unit to be exposed to strong winds (such
as coastal applications), ensure that the unit has a wind barrier. This will
assist with preventing strong gusts of wind from entering the unit’s cabinet
and interfering with the fan operation. (Fig. 3 and Fig. 4)
More than 6in.(15cm)
More than 5in.(12cm)
More than
12in.(30cm)
More than
10ft.(200cm)
More than 5in.(12cm)
More than 6.5ft.(2.0cm)
Fig. 1
More than 12in.(30cm)
More than 24in.(60cm)
Fig. 2
Fig. 3
Strong
wind
Incorrect
Correct
Barrier
Strong
wind
Fig. 4
wind gusts
Correct
Incorrect
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Heat Controller VMH 09/12/18/24 SD Inverter Mini-Split
• Avoid areas where water, snow, or ice may fall from the roof onto the unit.
• In climates where snow is a consideration, locate the unit away from areas prone to drifting.
• Ensure the location of the unit will not be subject to snow drifts, heavy accumulation of snow or leaves or other seasonal debris. If
unavailable, provide an awning for the unit. (Fig. 5 and Fig. 6)
1. An awning can be built over the outdoor unit to prevent direct sunlight, rain exposure, or snowfall.
2. Ensure that the awning does not impede the unit’s required clearances or obstruct air ow.
3. The awning should be at least 2 ft. (0.6m) away from the top of the unit’s housing.
• Ensure free ow of air into and out of the unit. All air inlet/outlets should be free of obstructions such as walls and shrubs. Minimum
clearances should be maintained. (Fig. 2)
• During heating and defrost modes (heat pump models only), the condensate should be properly drained away from the unit. Use the
included drain joint and seal along with locally purchased hose to do so. (Fig. 8)
• Do not locate two or more units in any way that will block discharge air from one unit to another. Be certain that hot air from one unit
will not blow into a nearby unit to prevent recirculation or discharge air. (Fig. 7)
Rooftop installation
• If the outdoor unit is installed on a roof structure, be sure to level the unit.
• Ensure the roof structure and anchoring method are adequate for the unit location.
• Consult local codes regarding rooftop mounting.
• If the outdoor unit is installed on roof structures or external walls, this may result in excessive noise and vibration, and may also be
considered a non-serviceable installation.
• Oil traps must be made in the refrigerant line set (every 10 ft.) when the outdoor unit is located above the indoor unit.
Fig. 5 Fig. 6
More than 1ft (30cm)
More than 2ft (60cm)
More than 1ft (30cm)
Fence or
Obstacles
More than 2ft (60cm)
More than 2.5ft (70cm)
(Service space)
Fig. 7
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VMH 09/12/18/24 SD Inverter Mini-Split Heat Controller
Accessories
Number Name of Accessories Qty/unit
1 Wall Bracket 1
2 Plastic Dry Wall Anchor 5-8 depending on model
3 Self-tapping Screw A ST 3.9X25 5-8 depending on model
4 Seal (heat pump models only) 1 (Part 202720090001)
5 Drain Elbow (heat pump models only) 1 (Part 201101020011)
6 Remote Controller (with 2 AAA batteries) 1
7 Self-tapping Screw B ST2.9X10 2
8 Remote controller holder
9 Nano silver air lter (eld installed, not shown) 2
Note: Except for the parts provided above, all other parts needed for installation must be purchased
.
1
Tools needed for installation:
Level gauge
Screwdriver
Electric drill, Hole core drill o 2.5”(65mm)
Flaring tool set
Adjustable wrench
Refrigerant leak detector or a bottle of soap water
Vacuum pump
Gauge manifold
Thermometer
Multimeter
Pipe cutter
Tape Measure
Cable to wire units
Refrigerant line set for R-410A
Micron gauge
Allen wrench set (metric)
Remote Controller
6
Mounting screw
ST2.9x10-C-H
7
8
Air Filter
Remote Controller
holder
Additional drain pipe
Insulation
Seal
Drain Elbow
“U” bend (cable)
Fig. 8
• This illustration is for explanation purposes only.
• Copper lines must be insulated independently.
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Heat Controller VMH 09/12/18/24 SD Inverter Mini-Split
Wall Bracket should be
Indoor unit installation
ush with the interior wall
1. Wall Bracket Mounting
A. There are two tabs on the back of the
indoor unit that hold the wall bracket onto
the unit. Press them down with a at head
screwdriver to release the wall bracket from
the back of the unit.
B. Mount the wall bracket ush on structural parts
(studs) of the wall with proper unit clearances
Model R L H Hole Diameter
VMH 09 (4.3in) 110mm (7.1in) 180mm
VMH 12 (4.3in) 110mm (5.5in) 140mm
VMH 18 (5.3in) 135mm (10.2in) 260mm
(1.8in)
45mm
Fig. 9
02.56 in
(65mm)
in consideration. (Fig. 1 and Fig. 9)
NOTE: Any space between the unit and the
wall may cause noise or vibration.
C. Screw the wall bracket onto the wall with
type “A” self-tapping screws. If the wall
is made of brick, concrete or the like, drill
1/4” (5mm) diameter pilot holes in the wall.
Use anchors in conjunction with mounting
screws.
NOTE:
• Drill holes in the wall according to the stud
Model R L H Hole Diameter
VMH 24
(10.8in)
275mm
(10.8in)
275mm
(1.8in)
45mm
02.56 in
(65mm)
locations and corresponding mounting points
on the actual wall bracket that comes with your
unit. Wall brackets may vary by model and
specications are subject to change.
• It is important to use all screws provided to
seure the wall bracket to the wall.
2. Create Opening for refrigerant and
condensate lines
A. Determine hole position according to the
wall bracket that comes with your unit, the
unit’s required clearances (Fig. 1) and which
direction (left/right) the lines will be routed
from the back of your unit (Fig. 14). Drill
2.5”(65mm) hole angled downward (approx.
45°) toward the outdoors. (Fig. 11).
NOTE: Ensure that neither studs nor plumbing
are located directly behine the propsed hole
location.
B. Always use a conduit to route the piping
though the hole in the wall. Properly seal
the hole after routing the pipes through to
prevent debris, insects, or small animals
from entering.
3. Condensate Drainage
A. Run the drain hose sloping downward. Do not
install the drain hose as illustrated in Fig.12.
B. When extending the drain hose, with locally
purchased hose, insulate the connection
with armaex or similar pipe insulation
material. (Fig. 13)
Fig. 10
Indoor
Fig. 11
Do not block water ow by a rise
Pipe Insulation
Drain hose
Wall Cap
Wall
Outdoor
45°
Do not put the end of
drain hose into water
Wall
Extension drainhose
Fig. 12
7
Fig. 13
VMH 09/12/18/24 SD Inverter Mini-Split Heat Controller
4. Refrigerant Line Installation
A. Remove the knockout from the desired side
of the unit that the line set will be routed from.
The lines from the unit can be routed either
left or right, left back or right back (Fig. 14).
Right
Clamp
Knockout
Left
Left Back
Right back
Fig. 14
Top Flange
Bottom Flange
Fig. 15
Spacer
B. Remove the clamp (Fig. 14) before attempt-
ing the bend the line set to prevent kinks.
The clamp may be replaced and used to hold
the line set in place, but this depends on the
routing direction of the line set and whether it
is needed, taking into account the line’s bend
radius.
C. Loosley run the line set connections from the
indoor unit through the hole in the wall.
D. Hang the unit onto the top anges of the wall
bracket. Ensure the unit is properly seated.
(Fig. 15)
E. Keep the unit away from the wall to prevent
the line set from being kinked or crushed, use
a piece of styrofoam as a spacer between the
back of the unit and the wall. (Fig. 16)
F. Feed the condensate drain line and refriger-
ant line set through the hole such that the unit
can sit ush against the wall then remove the
spacer.
G. Push the bottom of the unit up and onto the
lower anges of the wall bracket. Ensure that
unit is properly sealed.
H. Be sure that the overall installation of the
indoor unit and installation plate and ush
against the wall and level.
Knockout
5. Piping and insulating
A. Bundle the tubing, connecting cable*, and drain
hose with tape or wire ties as shown in (Fig.17).
B. Be sure to arrange the drain line such that it
is at the lowest point within the bundle as they
exit the unit and hole in the wall to the outdoors. (Fig. 17)
C. Because the condensed water from rear of
the indoor unit is gathered in the ponding. Do
not put anything else in this area.
E. Insulated the liquid line and suction lines
separately.
8
*Connecting
Drain line
Indoor Unit
Cable
Fig. 16
Ponding box
Line set
Tape/wire tie
Fig. 17
Heat Controller VMH 09/12/18/24 SD Inverter Mini-Split
Outdoor Unit Installation
• Install the outdoor unit on a rigid base such a
concrete slab to prevent increasing noise level and
vibration.
• Use a raised concrete pad or concrete blocks to
provide a solid, level surface. Securely anchor the
unit down with bolts.
• In a snowy area, slab should be higher than drifting
snow.
• See outdoor installation location information on page.
4 for more details and acquired clearances.
Air inlet
Anchoring outdoor unit
Anchor the outdoor unit to the concrete slab with lag
bolts or similiar size, may vary by model.
NOTE: Lag bolts are eld provided and do not come
with the unit.
Refer to unit’s mounting footprint for mounting hole
locations A & B. (Fig. 18)
Model
VMH 09
VMH 12
VMH18
VMH 24
W H D W1 A B
29.9 in.
(760 mm)
33.3 in.
(845 mm)
36.7 in.
(900 mm)
11.2 in.
(285 mm)
12.6 in.
(320 mm)
12.9 in.
(315 mm)
23.2 in.
(590 mm)
27.6 in.
(700 mm)
35.1 in.
(860 mm)
Condensate Drainage
• For heat pump models only.
• Condensate and defrosted water, created by the
unit operating in heat mode, should be routed
and drained away from the unit.
• Fit the seal onto the drain elbow, then insert the
drain elbow into the hole on the base pan of the
outdoor unit, rotate it 90° to secure into place.
(Fig. 19)
• Connect a locally purchased drain and insulated
hose to the hose barb end of the elbow.
• Route the hose to drain location away from
the unit.
32.4 in.
(823 mm)
35.7 in.
(908 mm)
40 in.
(980 mm)
Seal
Air inlet
20.9 in.
(530 mm)
22.0 in.
(560 mm)
24.1 in.
(590 mm)
Drain elbow
Air outlet
W1
Fig. 18
11.4 in.
(290 mm)
13.2 in.
(335 mm)
13.6 in.
(333 mm)
Base pan hole of
outdoor unit
Note:
Some models may have more then one drain hole in
the base of the unit.
Fig. 19
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VMH 09/12/18/24 SD Inverter Mini-Split Heat Controller
Refrigerant Line Set Installation
Refrigerant Line Set Installation
1. Purchase line sets through a Heat Controller
distributor with consideration of the minimum and
maximum line lengths. (Fig, 20)
2. Ductless mini-splits require both-liquid and
suction-lines to be insulated.
3. Connections are made via are nuts.
4. The number of bends and length of refrigerant
lines determine the pressure drop which affects
capacity and efciency of the system, as well
as oil return. Minimize the length and number of
bends when possible during installation.
5. Minimum line set length must be maintained,
even if the installation does not require it. Extra
length that is unnecessary can be coiled up near
the outdoor unit (Do not to block air inlets/outlets).
6. Choose a location that places the outdoor unit as
close to the indoor unit as possible to minimize
line set lengths.
7. Use only clean, refrigerant grade tubing suitable
for R-410A.
8. Avoid installing refrigerant lines on wet/rainy
days.
9. Always keep tube ends sealed until the nal
connections are to be made.
10. If line sets are being made at the time of
installation, rather than being purchased, be sure
to:
• Remove burrs from cut ends of the tubing
• Use tube benders to prevent kinking.
• Ensure tube cuts are square in relation to the
end of the tube.
• Use the proper diameter tube and are nut
sizes recommended by the manufacturer.
• Insulate both lines with Amraex of equivalent
with a wall thickness if at least 3/8”. Although
the liquid line does not have to be insulated, it
is recommended.
Refrigerant Piping
Liquid Side-Gas Side Inch 1/4 - 3/8 1/4 - 1/2 3/8 - 5/8
Max. Refrigerant Pipe
Length Unit Separation*
Max. Level
Difference/Vertical Lift**
*Minimum pipe length must not be less that 10 feet.
** Trap rises every 10 feet (5-7m) with a ‘p’ trap when outdoor unit is mounted above
the indoor unit.
Ft.
(m)
Ft.
(m)
• Use copper tubing suitable to withstand
pressures for R-410A refrigerant. We
recommend a min. wall thickness of 0.027in.
(0.7mm).
11. The tube size should always be the same
diameter as the connections provided at the
service valves of the outdoor unit.
Note: On some models, a reducer or an
expander may be shipped with the indoor unit
in order to adapt the line set connection to
the proper size to mate with the indoor unit’s
connection. Be sure to check for this part, should
you discover that the outdoor units service valve
sizes differ from the indoor unit. If this part is
shipped with the indoor unit, then it is required to
be used.
12.Up sizing/downsizing the refrigerant lines/
connections can result in inadequate oil return to
the compressor or excessive refrigerant return
and will void the warranty.
13.Do not over torque the connections, excessive
force can break the are nut.
14. When routing the line set between the outdoor
and indoor units:
A. Support the tubing adequately to avoid sags
that can trap the oil.
B. Isolate the tubing so it does not transmit
noise from vibration into the structure of the
building.
C. Avoid sharp edges that could cut the tubes.
D. Trap rises every 10 ft. (5-7m) with a ‘p’ trap.
When outdoor unit mounted above
indoor unit.
Fig. 20
Model No.
VMH 09 VMH 12/18 VMH 24
82 (25)
33 (10)
10
82 (25)/
98 (30)
33 (10)/
66 (20)
98 (30)
66 (20)
Heat Controller VMH 09/12/18/24 SD Inverter Mini-Split
Leak Test, Evacuation & Release of Refrigerant
The recommended procedure for leak test, evacuation,
WARNING
It is illegal to discharge refrigerant into the
atmosphere. Use proper reclaiming methods
and equipment when working on the refrigerant
containing parts of the unit. Service should be
performed by a QUALIFIED service agency and
certied technicians.
The condensing unit is supplied with a R-410a
factory approximately 25 ft. (7.6m) of line charge,
sufcient for most matching evaporator units.
Charge must be added for interconnecting tubing.
See Field Charging Section of this manual.
The unit’s service valves are shipped in the closed
position and should not be opened until nal
connections and evacuation are completed.
and release of refrigerant is outlined below:
1. Complete the nal piping connections to the indoor
and outdoor units using high temperature brazing
alloy.
2. Connect a charging manifold to the service ports
provided at the service valves.
3. Pressurize the lines and evaporator with nitrogen
and leak check all connections with soap bubbles.
Repair as necessary any faulty joints. If brazing is
required be sure to RELEASE THE NITROGEN
FIRST. Re-test as needed.
4. Connect a vacuum pump to the manifold center
connection, start the pump and open the manifold
valves.
5. Evacuate to 500 microns or less for a minimum of
30 minutes. Close the manifold valves and shut off
the pump. Note the vacuum reading and wait 15
minutes. Take a new vacuum reading. A reading
of 800 microns or higher indicates the presence of
moisture or a leak.
6. Repair as necessary and repeat steps 3, 4 & 5.
7. Conrm that manifold valves are closed and
disconnect the vacuum pump.
8. Remove the caps from the services valves. Open
the valves to the fully ‘back-seat’ position. Replace
service valve caps and tighten.
Electrical Precautions
CAUTION
1. Refer to the unit’s rating plate for power supply voltage. Ensure adequate electrical supply
is available.
2. Ensure the air conditioner is properly grounded.
3. Connect wiring to the unit according to the electrical diagram located on the unit.
4. All wiring must comply with local and national electrical codes and be installed by a qualied electrician.
5. An individual branch circuit must be available.
6. Properly size the HACR breaker/fuse based on nameplate date.
7. Improper connections and inadequate grounding can cause injury or death.
8. Connect all wiring tightly. Loose wiring may cause overheating at connection points and
create a possible re hazard.
9. Match terminal strip numbers/labels and colors between indoor and outdoor wiring. Erroneous wiring may cause re/shock.
10. Always use strain reliefs and outdoor cable cover to protect wiring.
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VMH 09/12/18/24 SD Inverter Mini-Split Heat Controller
Unit Wiring
The contractor is to provide an individual branch
WARNING
• Before performing any electrical work, ensure
all power is off. Electrical shock may occur.
• All outdoor unit’s capacitor’s to discharge
otherwise electrical shock hazard may occur.
• Ensure the unit is properly grounded.
circuit for over current protection for the unit as
required by code. Some codes may require a
disconnect between the indoor and outdoor unit.
Run power supply wiring through a weatherproof
disconnect box and conduit to the unit connection.
Disconnects are required to be within sight and
easy reach of the unit (usually within 3 feet).
Circuit breakers and disconnect switches should
be properly sized based on the required codes and
the unit’s nameplate requirements. (Fig.21)
ELECTRICAL WIRING
AND SUPPLY VOLTAGE:
All electrical wiring must be done according to
local codes. Additionally installations in the USA,
must conform to the current National Electric Code
(NEC) and Installations in Canada must conform to
current Canadian Electric Code (CEC). Nameplate
data indicates the operating voltage, phase,
ampacity, maximum over current protection, and
minimum voltage.
Model BTUH/H 9 12 18 24
POWER
(outdoor)
CIRCUIT BREAKER/FUSE (A) 15 15 20 25
MINIMUM CIRCUIT AMPACITY 9 9 13 15
NOTE: Subject to change. Always refer to unit’s nameplate.
PHASE 1 Phase 1 Phase 1 Phase 1 Phase
VOLT 208/230V 208/230V 208/230V 208/230V
Check the unit wiring diagram for the number of
conductors required. Ensure that the proper AWG
(gauge) and type of wired is used to comply with
code and the unit’s nameplate. Route neatly and
protect from sharp edges and damage.
Inadequate wiring and/or improper electrical
supply will likely result in failure of the compressor
and other electrical components and voids the
warranty.
Fig. 21
Power supply cord
Power supply
1 o 208-230V~60Hz
Branch circuit breaker
12
Heat Controller VMH 09/12/18/24 SD Inverter Mini-Split
Electrical Work
INdOOR/OUTdOOR
COMMUNICATINg CAbLE
Indoor Wiring
1. Wiring must conform to local and national electric
codes
2. Lift the indoor unit’s panel up, remove the
electrical box cover by loosening the screw as
shown in (Fig.22).
3. Connect each conductor to the terminal of the
indoor unit (L1, L2, S and Ground) based on the
labels of each terminal (Fig. 23).
4. Use strain relief to secure the cable (Fig. 23).
5. Ensure the wire color and location to and from
each terminal are identical between the indoor
and outdoor terminal strips.
6. Wrap any loose cables not connected with
terminals with electrical tape, so that they will not
touch any electrical components.
7. Refer to the wiring diagram located on the
outdoor unit and/or under the front panel of the
indoor unit for proper wiring
8. Heat Controller recommends using 600V THHN
14AWG/4 conductor unshielded stranded copper
cable, however local and national codes for wire
should always be followed based on your specic
application.
Terminal block of indoor unit
To outdoor unit To outdoor unit
Fig. 22
Panel
Electrical box cover
or
Fig. 23
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VMH 09/12/18/24 SD Inverter Mini-Split Heat Controller
Electrical Work
Outdoor unit power and
communication cable wiring
1. Remove the electrical control cover from the
outdoor unit (Fig. 24).
2. Connect power supply wires to the right side of
the outdoor unit’s terminal strip. (Fig. 25)
3. Connect the green/yellow ground from the power
supply wire to ground terminal. (Fig. 25)
4. Connect the communication cable from the
indoor unit to the outdoor unit’s terminal strip on
the left side. (Fig. 25)
5. Connect the ground wire of the communication
cable to the ground terminal. (Fig. 25)
6. To prevent water from entering in the unit, form a
loop in the cable (Fig. 26).
7. Insulate any unused conductors with electrical
tape, so that they do not touch any other
exposed electrical or metal parts.
Outdoor Unit
To power supply
Over 1 3/5in. (40mm)
Conduit panel
Connecting cable
Power supply cord
Cover control
Fig. 24
Fig. 25
Terminal block of outdoor unit
Fig. 26
Air inlet(side)
Air outlet
Air inlet(rear)
Cover
Screw
Loop the cable
T o i n d o o r u n i t To power supply
OR
T o i n d o o r u n i t To power supply
14
Heat Controller VMH 09/12/18/24 SD Inverter Mini-Split
Initial Start-Up & Checks
Operation of the unit will depend on the setting of
the thermostat on the unit or the remote control.
Refer to the owner’s manual and remote control
manual for operating instructions.
IMPORTANT!
All panels must be installed, main power turned on
and the wiring, refrigerant lines, and condensate
drain lines properly connected before operating the
unit.
Test-Run / Initial Start-up
1. Press the ON/OFF button on the remote control
to turn the unit on.
2. Press the mode button on the remote control to
check that each mode (Cool, Heat*, Auto, Dry
and Fan only) works properly.
3. When the ambient temperature is too low (below
62°F/16°C) to run the unit in cooling mode to
check the system, the unit can be placed in
manual operation.
4. To place the unit in manual operation, gently
lift up the lower left and right sides of the front
panel unit it opens and clicks into a locked
position where it props itself open.
5. Under the unit’s front panel the cover to the
indoor electrical terminal strip has an oval
shaped opening labeled “AUTO/COOL”.
Through this opening, the “AUTO/COOL” button
can be accessed with a long, thin object, such
as a pen/athead screwdriver.
6. Press the “AUTO/COOL” button and manual
operation will begin.
7. Manual operation will allow the unit to run for 30
minutes while any nal inspections are made.
FIELd CHARgINg
Unit performance, efciency, and life depends,
to a large extent, on a proper system charge.
Time spent on getting the charge right at start-up
will payoff in the long run. Operating conditions
such as voltage, air ow, evaporator coil size,
and indoor and outdoor temperature and humidity
all have an effect on the system pressures and
superheat conditions.
Condensing units are factory charged for the
outdoor and indoor unit with 25ft. (7.6m) of
refrigerant lines. Charge must be added for the
interconnecting tubing.
These units should be critically charged to ensure
proper performance. Some systems may require
additional charging of refrigerant, depending on
line set lengths.
R = T X (L-25)ft
R(oz): Additional refrigerant to be charged
L(ft): The length of the refrigerant line
T(oz): The quantity of the charged refrigerant
per additional foot.
Model
oz/ft 0.16 0.32
09, 12, 18 24
FINAL INSPECTION
Do a nal visual inspection of the entire installation.
Complete any nal details and clean up.
Manual control button
o AUTO/COOL
Fig. 27
Review Unit and Remote Control Operation with
the homeowner/user.
Ensure homeowner/user is provided with all
manuals, warranty cards, etc.
15
VMH 09/12/18/24 SD Inverter Mini-Split Heat Controller
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12/2013
16
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