Heatcontroller VMH 24 SD User Manual
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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