Marvair 12 volt Manual

Marvair 12 volt Manual

Marvair's 12 Volt DC Air Conditioner Owner's Manual provides essential information for operating and maintaining the SMB05ACP model. It includes safety considerations, routine maintenance tips, and troubleshooting guidance for optimal performance. This manual is designed for boat owners and marine technicians, ensuring safe and efficient use of the air conditioning system. Key topics include thermostat setup, winterization procedures, and a detailed wiring diagram. The manual also features a comprehensive spare parts list for easy reference.

Key Points

  • Includes safety considerations for the Marvair SMB05ACP air conditioner.
  • Provides routine maintenance guidelines to ensure optimal performance.
  • Details troubleshooting steps for common issues with the air conditioning unit.
  • Offers winterization procedures for both in-water and out-of-water storage.
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Part #01514 9/09-3
Supercedes 5/09-2
Owner’s Manual
Chapter 1: Safety Considerations .............................................................................2
Chapter 2: Routine Maintenance ..............................................................................3
Chapter 3: General Description.................................................................................5
Chapter 4: Thermostats and Controllers ...................................................................6
Chapter 5: Winterizing the System ...........................................................................7
Chapter 6: Troubleshooting......................................................................................8
Chapter 7: Wiring Diagram.....................................................................................10
Chapter 8: Spare Parts List ....................................................................................11
Chapter 8: Warranty..............................................................................................12
Manufactured By:
Marvair
®
Division of AIRXCEL®, Inc.
P.O. Box 400 • Cordele, Georgia 31010
156 Seedling Drive • Cordele, Georgia 31015
Ph: 229-273-3636 • Fax: 229-273-5154
Email: marvair@airxcel.com
www.marvair.com
Marvair Marine UK
Unit B8 • Arena Business Centre • Holyrood Close
Poole, Dorset BH17 7FL.
+44 1202 606405
www.marvair.co.uk
Self-contained 12 Volt DC
Air Conditioner
Model SMB05ACP
SMB Air Conditioner
12 VDC Owner’s Manual 9/09 Page 2 of 13
Chapter 1 – Safety Considerations
Congratulations on your purchase of a marine air conditioner by Marvair
®
. Your air conditioner has
been designed to provide years of safe, dependable operation. These instructions contain a general
description on the operation of the unit, how set up thermostat, a list of routine maintenance items, basic
trouble shooting information, and the warranty.
The first thing we recommend for you to do is to write down the serial number of the unit. The number
can be found on the data label on the unit. Refer to them whenever you call upon your Marvair Marine
dealer regarding this unit.
Model No. SMB05ACP
Serial Number___________________
Safety Considerations
This is the safety alert symbol . When you see this symbol on the Marvair Marine unit and in the
instruction manuals be alert to the potential for personal injury. Understand the signal word DANGER,
WARNING and CAUTION. These words are used to identify levels of the seriousness of the hazard.
DANGER Failure to comply will result in death or severe personal injury and/or property damage.
WARNING Failure to comply could result in death or severe personal injury and/or property
damage.
CAUTION Failure to comply could result in minor personal injury and/or property damage.
IMPORTANT is used to point out helpful suggestions that will result in improved installation, reliability
or operation.
DANGER
Self-contained units or evaporators of split systems should never be installed in engine rooms or other
areas where fuel, battery or bilge vapors may be introduced to the living quarters on board.
These components do not meet federal requirements for ignition protection. Do not install in spaces
containing gasoline engines, tanks, LPG/CPG cylinders, valves, fuel line fittings, or regulators. Failure
to comply may result in injury or death.
Do not terminate condensate drain line within four feet of any outlet of engine or generator exhaust
systems, nor in a compartment housing an engine or generator.
Installation and servicing of this system can be hazardous due to system pressure and electrical
components. When working on this equipment, always observe precautions described in the literature,
tags and labels attached to the unit(s). Follow all safety codes.
Marvair recommends that you use only factory certified, EPA licensed refrigerant technicians and
qualified marine electricians. ABYC certification in both HVAC and Marine electrical trades is
desirable. In receiving these certifications, a technician and his employer has made a statement of
commitment to professional, technically proficient and reliable service.
CAUTION
Certain components will run at fairly high temperatures. Exercise care in working around operating
equipment. Do not touch operating machinery without the aid of qualified personnel, as referred to
above.
SMB Air Conditioner
12 VDC Owner’s Manual 9/09 Page 3 of 13
Chapter 2 - Routine Maintenance
Air Flow
Proper air flow is critical to the operation of the air conditioner. All grilles, both supply and return, must
never be blocked by objects such as bed linens, duffel bags, tackle boxes, etc.
Return Air Grille(s) and Filter(s)
Return air grilles are available in both aluminum and wood in standard configurations. They do not have
adjustable louvers and are available with and without filters. Return air filters should be cleaned
regularly. The filter shipped with your unit is located in front of the air coil can be cleaned with a
vacuum cleaner or rinsed with fresh water.
If your unit’s return air grille has a filter, be sure that your boat builder or installation technician has
removed the standard filter that comes with every unit in front of the evaporator (air) coil. Two filters
can unduly restrict air flow and in some cases, cause problems with performance. Use EITHER a return
air filter grille or the supplied filter, never both.
Depending upon the floor plan, your boat’s space constraints may dictate that a unit be installed in an
area that makes it difficult to access and clean the filter. If this is the case, and you do not have a return
air filter grille, you should consider removing the disposable unit filter and upgrading to a return air
filter grille.
NOTE: Blocking the return air grille of neglecting filter cleaning will result in a restriction of air flow.
After a period of time, ice will form on the evaporator coil and a resultant LOW PRESSURE FAULT
shutdown.
Supply Air Grille(s)
Some installations will have more than one supply air grille. Standard main supply air grilles are
generally made of aluminum or wood frames with two or four-way adjustable louvers. These may be
adjusted to direct air flow from the grille to ensure a uniform cabin temperature. Main supply air grilles
should never be closed at any time while the unit is running. The secondary supply air grille more
frequently will be a 4” (102mm) round plastic design, but they can also be of the aluminum or wood
frame standard configuration and are usually located out of the main salon, galley, dinette area. These
may, depending upon the style you or your boat manufacturer has chosen, be closable. During the day, it
may be closed should you like more air directed to the main living area. Consult with your local Marvair
Marine service representative if you are unsure which is the main supply grille on your boat. Closing off
the main supply air grille or secondary air grille, in some applications, may restrict air flow and cause
ice up of the evaporator in the cooling mode.
Condensate Pan and Lines
The condensate and lines can develop an algae type growth. Periodic inspection and treatment with a
mild solution of bleach and water poured into the condensate pan will keep the condensate pan and lines
clear.
Sea Water Strainer
The seawater strainer is available in several configurations – bronze or plastic. Yours has been sized in
accordance to system specifications for volume of water required. It is used to prevent debris such as
eelgrass, sea weed, leaves, etc., from passing through the system water lines and condensing coil. These
items could lodge themselves in the water supply causing several possible shutdown faults, and left
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End of Document
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FAQs of Marvair 12 volt Manual

What safety precautions should be taken when using the Marvair air conditioner?
Safety precautions include ensuring the unit is not installed in engine rooms or areas with fuel vapors, as these do not meet federal ignition protection requirements. It's crucial to keep the condensate drain line clear and to use only certified technicians for installation and servicing. Regular inspections and maintenance are recommended to prevent hazards associated with high temperatures and electrical components.
How do I maintain the air flow in the Marvair air conditioner?
Proper air flow is critical for the Marvair air conditioner. All supply and return air grilles must remain unobstructed by objects like linens or bags. Regular cleaning of return air filters is essential, and only one filter should be used at a time to avoid airflow restrictions. Neglecting these maintenance tasks can lead to ice formation on the evaporator coil and system shutdown.
What steps are involved in winterizing the Marvair air conditioner?
Winterizing the Marvair air conditioner involves different procedures based on whether the boat is in or out of the water. For in-water storage, a potable anti-freeze solution must be run through the system until it discharges overboard. If the boat is out of the water, draining the system and ensuring all components are free of water is necessary to prevent freezing damage.
What troubleshooting steps should I take if the unit does not operate?
If the Marvair air conditioner does not operate, first check the power supply and ensure that circuit breakers are not tripped. Verify the thermostat settings and check for any loose connections. If the blower runs but the compressor does not start, inspect the safety switches and check for refrigerant leaks.

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