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Marvair GAA A/C w/Gas Heat I&O Manual
06/2023 Rev.5
the coil in the front of the unit. Both the intake and exhaust air must not be impeded or restricted
by shrubbery or any other obstructions.
14. The power supply must have the appropriate voltage, phase and ampacity for the model selected.
Refer to the data plate on the unit for ampacity requirements. Voltage must be maintained above
minimum levels and below maximum levels shown below.
Electrical Rating Designations*
A
C
D
Nominal Voltage
208 / 230
208 / 230
460
Phase
1
3
3
Minimum Voltage
197
197
414
Maximum Voltage
253
253
506
*
Letters refer to model number code designations. Refer to Model Identification on page 5.
Table 2. Electrical Rating Designations
15. Marvair GAA air conditioners with gas heat may be used for heating and cooling in buildings
under construction provided that ALL installation procedures described in this manual are followed
including, but not limited to:
a. The unit must be properly vented,
b. The unit must be controlled by a thermostat,
c. The return air duct must be sealed to the unit,
d. The air filters must be in place,
e. The input rate and the temperature rise must be within the range shown on the data plate on
the unit,
f. The unit must be installed on the exterior of the building for providing outdoor air for
combustion, and
g. Return air temperature between 55° F ( 13° C ) and 80° F ( 27° C)
Upon the completion of the construction process, the unit, duct work and components must be
cleaned and the proper operation of the furnace verified including ignition, input rate, temperature
rise and venting as described in this manual.
