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Marvair ModPac Installation & Operation Manual
11/2017 Rev.8
EXPLODED VIEWS AND PARTS LISTS
Current parts lists and exploded views of the unit can be found on our web site at www.Marvair.com.
Click on the Service and Parts in the menu on the left hand side of the Home page. From the drop
down menu, select Exploded Views. Once here, you can select your air conditioner or heat pump.
The units are grouped by model and by the refrigerant – R-22 or R-410A.
APPENDIX A: Installation Instructions for Field Installed Electric Heat
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.
Duct Work
General Information
Note: The following instructions are for general guidance only. Due to the wide variety of installation
possibilities, specific instructions will not be given. When in doubt, follow standard and accepted
installation practices, or contact Airxcel Commercial Group for additional assistance.
Wall Openings
Measure the dimensions of the supply and return ports on the unit.
Cut the openings in the exterior wall for the supply and return.
IMPORTANT: All units with electric
heat must have 1" (25.4 mm) clearance on all four sides of the supply outlet duct flange on the
unit. The 1" (25.4 mm) clearance must extend on all sides of the supply duct for the first 3 feet
(1 meter) from the unit.
IMPORTANT: Airxcel Commercial Group requires a minimum of 1" (25.4 mm)
from the surface
of any supply ducts to combustible material for the first 3 feet (1 meter) of the duct.
Ducting
Extensions should be cut flush with the inside wall for applications without duct work.
Applications using duct work should be designed and installed in accordance with all applicable safety
codes and standards. Airxcel Commercial Group 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 the heater element. This includes proper supply duct sizing, sufficient quantity of supply
registers, adequate return and filter area. Ductwork must be of correct material and must be properly
insulated.