6
Ultra-Aire MD33 Installation Instructions
www.InWallDehumidifier.com | (800) 533-7533
OPTIONAL ACCESSORIES
4037766
Surface Mount Kit
Available for masonry CMU or installations where the unit cannot be recessed into the wall.
4037767
2x4 Wall Mounting Bezel Kit
Available for 2x4 wall installations where the unit cannot be allowed to penetrate the opposite side wall.
4037768
Rear Panel Kit
Available for 2x4 wall installations where the unit will penetrate through the other side of the wall into an
unconditioned space.
4037714 Washable Filter
4039155 Washable Filter, 6-Pack
Important Precautions
• If used near a water source, be certain that there is no chance the unit could get splashed. Connecting the
unit to a dedicated circuit with Ground Fault Circuit Protection is recommended. Electrical wires must be
properly grounded, and with the capability to be disconnected to provide for service.
• The device is designed to be installed indoors in a space that is protected from rain and flooding.
• Tamper proof fasteners provide access to the front of the device for operation, maintenance and service.
• Avoid directing discharge air at occupants.
• DO NOT place sides, top or bottom of cabinet in direct contact with structural building members or
unwanted noise may result. Unit is designed to be suspended by side mounting flanges only.
• Drain hose must be routed with downward slope from unit drain connection to appropriate location. Consult
local building codes for acceptable condensate drain connections.
Location Considerations
• Install the unit on or inside of an interior wall and with direct connection to building electrical service.
A 15 Amp circuit must be provided. Install the unit in a location that is near a power supply.
• Electrical and plumbing rough-in must be provided to installation location, adhering to any applicable local
codes.
• Install the unit such that discharge air is directed away from thermostats and not installed inside of a wall
cavity that contains a thermostat.
• Install the unit in an area that is not near the A/C return or below a supply vent.
• The unit generates condensate. Install the unit with nearby access to a drain or determine if there will be a
need for a condensate pump.
• The unit will fit within 16
"
O.C. stud walls. If walls are more or less than 16
"
, consideration must be given to
providing additional support.
• Rough opening must be a minimum of 2
"
off the floor, 6
"
from the ceiling, and 10
"
from an inside corner.
• Check that there are no hidden wires or pipes inside the wall where unit is to be installed. Contact a certified
electrician or plumber before removing any wires or pipes inside the wall.
DEHUMIDIFIER SET UP
