Marvair - Model GAH1024A-1060A -Wall-Mounted Air Conditioners with Gas Heat
The Marvair GAH Series comprises advanced wall-mounted air conditioners integrated with gas heat, tailored for diverse settings such as modular classrooms, relocatable offices, and various permanent buildings. These units come in two cabinet sizes, offering nominal cooling capacities ranging from 2 to 5 tons and heating inputs from 45,000 to 125,000 BTUH. Designed with energy efficiency and safety in mind, the GAH units comply with UL/CSA standards, ANSI/ASHRAE/IESNA 90.1.2010, and are ANSI/ARI Standard 390 rated. Their construction allows for both factory and field-installed options to optimize usage per specific applications. Not intended for residential use, these air conditioners are characterized by an EER of 1100 and boast 80% heating efficiency. Technological features include a patented tubular heat exchanger, inshot gas burners, and a direct spark ignition system with LED diagnostics, ensuring reliability in performance and ease in both installation and service.
General Description
Marvair GAH1024A - GAA1060A wall mounted air conditioners with gas heat are designed for use on a variety of applications including modular classrooms, relocatable offices and a multitude a permanent buildings. The GAH unit is manufactured in two cabinets with nominal cooling capacities of 2, 2-1/2, 3, 3-1/2, 4 and 5 tons and input heating capacities of 45,000; 67,500; 75,000; 90,000; 100,000 and 125,000 BTUHs.
The Marvair GAH series is available with a number of factory and field installed options and accessories that permit the user to optimize the unit for specific applications.
Safety Listed and Energy Certified
All Marvair air conditioners conform to UL/CSA standard 60335-1 and 60335-2-40 and CAN/CSA C22.2, No. 236-11 Ed.4. For energy efficiency and performance, the units are tested and rated in accordance to the current ANSI/ARI (Air-Conditioning and Refrigeration Institute) Standard 390 (Single Package Vertical Units). All units meet or exceed the efficiency requirements of ANSI/ASHRAE/IESNA 90.1.2010. Marvair GAA air conditioners are commercial units and are not intended for use in residential applications.
Economical Gas Heat
- Factory set up for natural gas with easy conversion in field to propane
- Natural gas high altitude pressure switch kit allows operation in sites from 6,000 to 10,000 ft. (1,830 m to 3,050 m)
- Propane high altitude pressure switch kit allows operation in sites from 6,000 to 10,000 ft. (1,830 m to 3,050 m)
- Vertical vent pipe kits
Ease of Installation
- Built-in mounting flanges eliminate need for side brackets
- Sloped top sheds water, minimizes chance of water leaks and eliminates the need for a rainhood
- Top flashing piece and bottom mounting bracket provided on all units
- Electrical knockouts on back and side
- Gas connection on the right side
- Power disconnect
Ease of Service
- Compressor and electrical box are easily accessible
- Refrigerant access values allow quick check of refrigerant pressures
- Easily accessible filter
- LED identifies operating status and simplifies service by flashing fault code in heating mode
- Copper tube, aluminum fin evaporator and condenser coils
Protection of Refrigeration System Components
- High and low pressure switches
- Compressor time delay
Low Ambient Operation in Cooling Mode
- Condenser fan cycles allowing cooling to 20°F (-7°C)
Patented Tubular Heat Exchanger with Integral Formed Dimple Turbulator
- Enhanced heat transfer for optimum efficiency
- Quiet – eliminates noise caused by expansion and contraction of internal baffles
Patented Inshot Gas Burners
- Quiet, clean burning gas inshot burners fire in a direct line with the orifice and the tube
- Unique carryover design (cross lighting from one burner to another) for immediate lighting
- Optional stainless steel burner
Direct Spark Ignition Control System with LED Flash
- Fault Indicator
- Thirty second purge of heat exchanger prior to ignition
- Three ignition trials before lockout
- Sixty second post purge at end of operating cycle prevents nuisance trips of rollout switch
- One hour automatic reset after lockout – eliminates need to manually recycle on lockout
- LED identifies operating status and simplifies service by flashing fault code