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Marvair MAA/MGA Wall Mount AC Installation & Operation Manual
05/2023 Rev.21
Chapter 3 Installation
WARNING
Failure to observe and follow Warnings and Cautions and these Instructions could result
in death, bodily injury or property damage. Read this manual and follow its instructions
and adhere to all Cautions and Warnings in the manual and on the
A/C
unit.
3.1 Equipment Inspection
Concealed Damage
Inspect all cartons and packages upon receipt for damage in transit Remove cartons and check for
concealed damage.
Important: keep the unit upright at all times.
Remove access panels and examine
component parts. (Note: the "L"-shaped bottom bracket is screwed to the shipping pallet, against the
air conditioner. Remove it before replacing the side screen). Inspect refrigerant circuit for fractures or
breaks. The presence of refrigerant oil usually indicates a rupture. If damage is apparent, immediately
file a claim with the freight carrier.
Units that have been turned on their sides or tops may have concealed damage to compressor motor
mounts or to the oil system. If the unit is not upright, immediately file a claim for concealed damages
and follow these steps:
1. Set unit upright and allow to stand for 24 hours with primary power turned on.
2. Attempt to start the compressor after 24 hours.
3. If the compressor will not start, makes excessive noise, or will not pump, return the unit to the
freight carrier.
3.2 Installation Requirements
General
1. Inspect unit for completeness. Check for missing parts (e.g. hardware). Refer to the installation kit
information in section 2.3.
2. Remove access panels and check for loose wires. Tighten screw connections.
3. Complete and mail the warranty registration card.
You must consider all of the following when choosing the installation site:
1.
Noise.
Install the unit so that the least amount of noise will be transmitted to inhabited spaces.
2.
Condensate Drainage
. Condensate produced during operation must be discharged to a suitable
drain.
3.
Placement.
A) Place the unit in a shaded area, if possible.
B) Install it above ground for protection against flooding.
C) The unit exhausts air. Be sure that the airflow is not impeded by shrubbery or other obstructions.
D) When installing multiple units, please note the recommended clearances noted in Table 4.
4.
Airflow Requirements:
Note the maximum static pressure (Table 6). Keep duct lengths as short as possible. Do not obstruct
airflow through the unit.
Duct work should be designed and installed in accordance with
all
applicable safety codes and
standards. Marvair
®
strongly recommends referring to the current edition of the National Fire
Protection Association Standards 90A and 90B
before
designing and installing duct work.
The duct
system must be engineered to insure sufficient air flow through the unit to prevent over-heating of
