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Installation Manual - B-VMHxxAV-1
AIR-HANDLER
Installation Manual
Safety precutions & Installation
INSTALLATION MANUAL
Mini-Split Air-Handler
IMPORTANT NOTE:
Read this manual carefully before
installing or operating your new
air conditioning unit. Make sure to
save this manual for future reference.
AIR CONDITIONER
Model
B-VMH18, 24AV-1 Series
517.787.2100 • www.marsdelivers.com
North America Products
EN
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Table of Contents
Related Manuals for Mars Comfort-Aire Century B-VMH AV-1 Series
Summary of Contents for Mars Comfort-Aire Century B-VMH AV-1 Series
- Page 1 Installation Manual - B-VMHxxAV-1 AIR-HANDLER AIR CONDITIONER Installation Manual Safety precutions & Installation INSTALLATION MANUAL Mini-Split Air-Handler Model B-VMH18, 24AV-1 Series IMPORTANT NOTE: Read this manual carefully before installing or operating your new air conditioning unit. Make sure to North America Products save this manual for future reference.
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Page 2: Read This Manual
Installation Manual - B-VMHxxAV-1 INSTALLATION MANUAL SAFETY PRECAUTIONS ACCESSORIES INDOOR UNIT INSTALLATION REFRIGERANT PIPING CONNECTION INSTALLATION OF ELECTRIC AUXILIARY HEAT MODULE (ONLY FOR HEAT FUNCTION MODELS) CONFIRMATION OF INDOOR UNIT OUTDOOR UNIT INSTALLATION WIRING SPECIFICATION AIR EVACUATION NOTE ON ADDING REFRIGERANT TEST RUN Read this manual Inside you’ll find many helpful hints on how to use and maintain your air conditioner properly. -
Page 3: Safety Precautions
Installation Manual - B-VMHxxAV-1 SAFETY PRECAUTIONS Intended Use The following safety guidelines are intended to prevent unforeseen risks or damage from unsafe or incorrect operation of the appliance. Please check the packaging and appliance on arrival to make sure everything is intact to ensure safe operation. If you find any damage, please contact the retailer or dealer. - Page 4 Installation Manual - B-VMHxxAV-1 WARNINGS FOR PRODUCT USE • If an abnormal situation arises (like a burning smell), immediately turn off the unit and disconnect the power. Call your dealer for instructions to avoid electric shock, fire or injury. • Do not insert fingers, rods or other objects into the air inlet or outlet. This may cause injury, since the fan may be rotating at high speeds.
- Page 5 Installation Manual - B-VMHxxAV-1 • If connecting power to fixed wiring, an all-pole disconnection device which has at least 3mm clearances in all poles, and have a leakage current that may exceed 10mA, the residual current device(RCD) having a rated residual operating current not exceeding 30mA, and disconnection must be incorporated in the fixed wiring in accordance with the wiring rules.
- Page 6 Installation Manual - B-VMHxxAV-1 NOTE ABOUT FUSE SPECIFICATIONS • The air conditioner’s circuit board (PCB) may be designed with a fuse to provide overcurrent protection. This fuse must be replaces with identical component. • The specifications of the fuse, if equipped, are printed on the circuit board, examples of such are T5A/250VAC and T10A/250VAC.
- Page 7 Installation Manual - B-VMHxxAV-1 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 fire, or equipment failure. Accessories (Packed with the indoor unit) Manual Remote controller (optional)
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Page 8: Indoor Unit Installation
Installation Manual - B-VMHxxAV-1 INDOOR UNIT INSTALLATION CAUTION Install the indoor and outdoor units, cables and wires at least 1m (3-1/5′) from televisions or radios to prevent static or image distortion. Depending on the appliances, a 1m (3-1/5′) distance may not be sufficient. -
Page 9: Horizontal Installations
Installation Manual - B-VMHxxAV-1 WARNING There must be an airtight seal between the bottom of the air handler and the return air plenum. Use fiberglass sealing strips, foil duct tape, caulking, or equivalent sealing method between the plenum and the air handler cabinet to ensure a tight seal. Return air must not be drawn from a room where this air handler or any gas-fueled appliance (i.e., water heater), or carbon monoxide-producing device (i.e., wood fireplace) is installed. - Page 10 Installation Manual - B-VMHxxAV-1 Indoor unit parts installation size (unit: mm/inch) Model A Model(Btu/h) 12K~24K Dimensions 1143 Length of A inch Length of B inch Length of C inch 17-1/2 Length of D inch 15-3/4 Length of E inch 10-1/4 Recommended size of filter (unit: mm/inch) Model(Btu/h)
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Page 11: Installation Position Requirements
Installation Manual - B-VMHxxAV-1 Installation Position Requirements Vertical installations Horizontal installations NOTICE FOR DUCT CONNECTIONS： It should be assembled It should be insulated It should be Flexible It should be fabricated accordance to the and use a Vapor Barrier. suspension mounted and installed in instructions. - Page 12 Installation Manual - B-VMHxxAV-1 CAUTION A field-fabricated secondary drain pan, with a drain pipe to the outside of the building, is required in all installations over a finished living space or in any area that may be damaged by overflow from the main drain pan.
- Page 13 Installation Manual - B-VMHxxAV-1 Connecting the wire and pipes(pipes and drainage pipes) Vertical down Horizontal right Please follow these steps to perform installation and installation: Step 1 Open the upper cover. Step 2 Open the cover of the electronic control box. Step 3 Connect the wire according to the wiring diagram.
- Page 14 Installation Manual - B-VMHxxAV-1 Step 4 Step 5 Indication of the position of each Unplug temperature sensors T1,T2 from temperature temperature sensor the control board. of the evaporator, confirm your T1: Room temperature sensor model. T2: Evaporator central sensor plug 18-24K model NOTICE •...
- Page 15 Installation Manual - B-VMHxxAV-1 Step 6 Step 9 Take out the evaporator and drain pan and rotate 180° Reinstall T1, T2 sensor plug and tie up the sensor wires. (when your equipment need to be vertical downed configuration). Cut the foam gasket.
- Page 16 Installation Manual - B-VMHxxAV-1 Step 10 The evaporator is assembled in place. Step 11 Step 13 Use cable ties to fix the room temperature sensor as shown in the figure. Connect the wire according to the wiring diagram. cable Step 14 ties Reassenble the upper cover and Reinstall the filter, filter cover plate.
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Page 17: Vertical Discharge
Installation Manual - B-VMHxxAV-1 NOTICE ON PURCHASING PIPES Installation requires pvc pipe or other suitable material per local and national codes, which can be obtained at your local hardware store or dealer. WARNING • After removal of drain pan plug(s), check drain hole(s) to verify that drain opening is fully open and free of any debris. -
Page 18: Refrigerant Piping Connection
Installation Manual - B-VMHxxAV-1 REFRIGERANT PIPING CONNECTION WARNING All field 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. -
Page 19: Connection Instructions-Refrigerant Piping
Installation Manual - B-VMHxxAV-1 Connection Instructions—Refrigerant Piping Step 1: Cut pipes Step 2: Remove burrs When preparing refrigerant pipes, take Burrs can affect the air-tight seal of refrigerant piping extra care to cut and flare them properly. connection. They must be completely removed. This will ensure efficient operation and minimize the need for future maintenance. -
Page 20: Step 4: Connect Pipes
Installation Manual - B-VMHxxAV-1 Outdoor unit Liquid side piping (Smaller diameter) • Clamp flare from on the end of the pipe. The end of the pipe must extend beyond the flare form. (Bigger Flare form Pipe • Place flaring tool onto the form. Torque wrench •... - Page 21 Installation Manual - B-VMHxxAV-1 CAUTION • Thread this pipeline through the wall and connect it to the outdoor unit. Check to make sure there is no refrigerant • Insulate all the piping, including the valves of leak after completing the installation work. the outdoor unit.
- Page 22 Installation Manual - B-VMHxxAV-1 INSTALLATION OF ELECTRIC AUXILIARY HEAT MODULE (ONLY FOR HEAT FUNCTION MODELS) NOTICE Installation must be performed by an licensed contractor. Please make necessary precaution when performing the installation operation. Accessories Preparations for Installation Before installation, please confirm the electric Name Quantity Name...
- Page 23 Installation Manual - B-VMHxxAV-1 Step 3 Step 5 Remove the terminal block and power wires, Tighten the mounting screws. loosen the screws, and remove the electric auxiliary heating cover. screws. Step 6 Wire according to the wiring nameplate. Step 4 Apply the wiring diagram to the inside cover wiring is completed for future reference and Install the electric auxiliary heating assembly...
- Page 24 Installation Manual - B-VMHxxAV-1 CONFIRMATION OF INDOOR UNIT NOTICE Electric auxiliary heating wiring diagram packed with the accessories. If branch circuit wire lenght exceeds 100 ft, consult NEC 210-19a to determine maximum wire length. Use 2% voltage drop. After the electric heating wiring is connected, please confirm before power on: •...
- Page 25 Installation Manual - B-VMHxxAV-1...
- Page 26 Installation Manual - B-VMHxxAV-1 Electric auxiliary heating wiring diagram...
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Page 27: Outdoor Unit Installation
Installation Manual - B-VMHxxAV-1 OUTDOOR UNIT INSTALLATION NOTICE Install the unit by following local switchs and regulations , there may be differ slightly between different regions. Select the installation location of outdoor units Before installing the outdoor unit, you must choose an appropriate location. The following are standards that will help you choose an appropriate location for the unit. - Page 28 Installation Manual - B-VMHxxAV-1 Install drain fitting(Heat pump unit only) Base pan hole of outdoor unit Step 1： Find out the base pan hole of outdoor unit. Seal Step 2： Fit the rubber seal on the end of the drain fitting that will connect to the ●...
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Page 29: Anchor Outdoor Unit
Installation Manual - B-VMHxxAV-1 Anchor outdoor unit The outdoor unit can be anchored to the ground or to a wall-mounted bracket with bolt(M10). Prepare the installation base of the unit according to the dimensions below. Outdoor Unit Types and Specifications Front view Top view Outdoor Unit Dimensions... - Page 30 Installation Manual - B-VMHxxAV-1 If you will install the unit on the ground If you will install the unit on a wall-mounted bracket, or on a concrete mounting platform, DO THE FOLLOWING: DO THE FOLLOWING: Mark the positions for four expansion bolts Mark the position of bracket holes based on ●...
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Page 31: Wiring Precautions
Installation Manual - B-VMHxxAV-1 WIRING PRECAUTIONS WARNING BEFORE PERFORMING ANY ELECTRICAL WORK, READ THESE WARNINGS. All wiring must comply with local and national Do not let wires touch or rest against ● ● electrical codes, regulations and must be installed refrigerant tubing, the compressor, or any by a licensed electrician. -
Page 32: Outdoor Unit Wiring
Installation Manual - B-VMHxxAV-1 OUTDOOR UNIT WIRING WARNING Before performing any electrical or wiring work, turn off the main power to the system. Step 1: Prepare the cable for connection. 4. Clamp down the cable with the cable clamp. 5. Insulate unused wires with electrical tape. 1. -
Page 33: Indoor Unit Wiring
Installation Manual - B-VMHxxAV-1 INDOOR UNIT WIRING CAUTION • While connecting the wires, please strictly follow the wiring diagram. • The refrigerant circuit can become very hot. Keep the interconnection cable away from the copper tube. Step 1: Prepare the cable for connection. Type B Using wire strippers, strip the insulating jacket from both ends of the signal cable to reveal... - Page 34 Installation Manual - B-VMHxxAV-1 SPECIFIC WIRING METHODS WARNING Please refer to the wiring nameplate for the wiring method. Do not connect the power cord to the communication line, as this may damage the system. Connection method A: Connection method B: Refer to the wiring method of internal and To use a 24V thermostat, you need to refer to the external machine communication and wired...
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Page 35: Condensate Overflow Switch
Installation Manual - B-VMHxxAV-1 Connection method C: Condensate overflow switch: Cooling and Fixed-speed Type Only System The unit will accommodate a remote condensate Wiring Diagram: overflow switch. To enable, remove jumper J1, and connect the installer provided condensate overflow device to CN5 per below. When an overflow condition is present, the device should open connection signaling the unit to turn o the system. -
Page 36: Led Display
Installation Manual - B-VMHxxAV-1 Dehumidification control wiring Control logic Indoor unit connector Connector Purpose Dehumidification control requires external Humidistat at DH and R. Set S4-2 as OFF. When the humidity rises and exceeds the set value of the Humidistat, the 24V signal of DH changes to 0V, the cooling system starts the dehumidification operation, and the air volume drops to 80% of the nominal cooling air volume. -
Page 37: Dip Switch Definitions
Installation Manual - B-VMHxxAV-1 DIP switch definitions Function Rotary switch... - Page 38 Installation Manual - B-VMHxxAV-1 Function DIP switch settings: Function combination table of SW1-1 and SW1-4: The 24V thermostat mode needs to refer Control type Stand alone or full system to the following settings: Free match Free match Wired Full system controller Full system Thermostat...
- Page 39 Installation Manual - B-VMHxxAV-1 Table A 24V Tstat, S1+S2 S3 ( ) S3 ( Control Scenario Wired Controller S1+S2 Full 24V Outdoor unit DIP Switch setting Metering device location Address DIP switch: Determined by dial code S2 1-10K 2-5.1K Address dialing S1+S2: When the user uses the Dial code selection Website address centralized controller, the address dialing is...
- Page 40 Installation Manual - B-VMHxxAV-1 Air volume table 24V thermostat Wired controller Air flow External Static volume Capacity Fan speed Electric heater kit Pressure Range DIP Switch 24V terminal engaged DIP Switch Mode (CFM) Cooling Turbo — SW3-4=ON Y2/Y — Cool Cooling High —...
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Page 41: Air Evacuation
Installation Manual - B-VMHxxAV-1 AIR EVACUATION NOTICE When opening valve stems, turn the hexagonal wrench until it hits against the stopper. Do not try to force the valve to open further. Close the Low Pressure side of the manifold Preparations and precautions gauge, and turn off the vacuum pump. -
Page 42: Note On Adding Refrigerant
Installation Manual - B-VMHxxAV-1 NOTE ON ADDING REFRIGERANT CAUTION DO NOT mix refrigerant types. Some systems require additional charging depending on pipe lengths. The standard pipe length varies according to local regulations. For example, in North America, the standard pipe length is 7.5m (25’). In other areas, the standard pipe length is 5m (16‘). -
Page 43: Before Test Run
Installation Manual - B-VMHxxAV-1 TEST RUN CAUTION Failure to perform the test run may result in unit damage, property damage, or personal injury. 5. For the Outdoor Unit Before test run a. Check to see if the refrigeration system is leaking. - Page 44 Installation Manual - B-VMHxxAV-1 THIS PAGE IS LEFT INTENTIONALLY LEFT BLANK...
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- Page 47 If for any reason the replacement part/product is no longer available during for normal use and maintenance for ten (10) years from the date of purchase the warranty period, MARS shall have the right to allow a credit in the by the original consumer for the original installation. This Express Limited...
- Page 48 Installation Manual - B-VMHxxAV-1 1/2023...