Specifications
9
ModPac II, 9/09-15
C) The unit exhausts air. Be sure that the airow is not impeded by shrubbery or other ob-
structions.
4.
Airow Requirements. Note the minimum CFM requirements (section 2.4). Keep duct
lengths as short as possible. Do not obstruct airow through the unit.
Applications using 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 sufcient air ow through the unit to
prevent over-heating of the heater element. This includes proper supply duct sizing, sufcient
quantity of supply registers, and adequate return and lter areas. Duct work must be of correct
material and must be properly insulated. Duct work must be constructed of galvanized steel
with a minimum thickness of .019". Duct work must be rmly attached, secured, and sealed
to prevent air leakage. See section 2.4 for additional duct work requirements.
5. Clearances. Clearances around the MODPac II™ air conditioner are required for service
access and for proper operation of the unit. For service, the minimum clearance from either
side and the front is 30". The minimum clearance from the top is 24".
For proper operation, especially during warm ambient temperatures, proper condenser air is
essential. The condenser air is brought into the condenser compartment through grilles on each
side of the unit. The condenser air is discharged through the coil at the front of the unit. It is
important that the inlet air not be restricted and that the discharge air not be "short circuited"
back into the side intakes.
6. Codes. Make sure your installation conforms to all applicable electrical, plumbing, building,
and municipal codes. Some codes may limit installation to single story structures.
7. Electrical Supply. The power supply must have the appropriate voltage, phase, and ampacity
for the model selected. Voltage must be maintained above minimum specied values listed
below. Refer to the data sticker on the unit for ampacity requirements.
Table 1. Voltage Limitations
Electrical Rating Designations* A C D
Nominal Voltage 208/230 208/230 460
Phase and Hertz 1/60 3/60 3/60
Minimum Voltage 197 187 414
Maximum Voltage 253 253 506
*Lettersrefertothesystemelectricalratinginthemodelnumberidentication.
Refer to page 5.
8. Ventilation System Set-Up:
Manual Fresh Air System (Conguration N). This is the standard ventilation system in
the ModPac™ air conditioner. Fresh air ventilation by means of a damper can provide up to
15% of rated air ow of outside air. The damper has four positions corresponding to 0, 5, 10
and 15% of rated air ow of outside air.
The damper only opens when the indoor fan is operating. Position the screw on the side of
the damper hood for the desired air ow.