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Marvair MGA3090-3180 Wall Mount AC I&O Manual 05/2023 Rev.14
Accessories:
The package may include other factory-supplied items (optional):
P/N Description
S/07846
CommStat 4 HVAC Controller, Solid State Lead/Lag Controller
K/40167
CommStat 10 HVAC Controller
50123
Digital thermostat. 1 stage heat, 1 stage cool. 7 day programmable. Fan switch: Auto &
On. Auto-change over. Keypad lockout. Non-volatile program memory.
Supply Grille
P/N Description
93189
MGA3090A, MGA3120A & MGA3150A: 42½” x 15
1
/
4
” (1,080 mm x 387 mm)
93190
MGA3180A: 54½” x 15½” (1,384 mm x 394 mm)
Return Grille
P/N Description
93188
MGA3090A, MGA3120A & MGA3150A: 42½” x 21½” (1,080 mm x 546 mm)
93191
MGA3180A: 54½” x 21½” (1,384 mm x 546 mm)
Lifting Eye Kit
P/N Description
K/40025
MGA3090A/3120A/3150A/3180A
Additional Items Needed:
Additional hardware and miscellaneous supplies (not furnished by Marvair
®
) are needed for installation.
The list below has the items typically needed for mounting a unit on a wood frame wall structure.
Concrete or fiberglass structures have different requirements. Marvair cannot recommend a specific
method of attaching the air conditioner to the building due to the wide variety of building types, code
requirements, wall construction and specific installation conditions. The installation of the air conditioner
to the building must take in to account all of these factors and follow best industry practices to provide
a safe and secure attachment to the building.
• Mounting bolts for unit mounting flanges. The length needed is typically the wall thickness plus
one inch (25 mm).
• Washers
• Hex nuts
• Silicone Sealer to seal around cracks and openings
• Minimum 5 conductor low voltage multicolored wire cable (i.e. thermostat wire)
• Appropriate electrical supplies such as conduit, electrical boxes, fittings, wire connectors, etc.
• High voltage wire, sized to handle the MCA (minimum circuit ampacity) listed on the data plate.
• Over-Current Protection Device sized in accordance with the MFS (maximum fuse size) listed on
the unit data plate.
WARNING FIRE HAZARD
Improper adjustment, alteration, service, maintenance or installation could cause serious injury,
death and/or property damage.
Installation or repairs made by unqualified persons could result in hazards to you and others.
Installation MUST conform with local codes or, in the absence of local codes, with codes of all
governmental authorities have jurisdiction.
The information contained in this manual is intended for use by a qualified service agency that is
experienced in such work, is familiar with all precautions and safety procedures required in such
work, and is equipped with the proper tools and test instruments.
