Airxcel MAXXFAN DOME Series User manual

MAXXFAN DOME
INSTALLATION INSTRUCTIONS,
INFORMATION AND OPERATING GUIDE
FOR MODELS 3810, 3812
READ AND SAVE THESE INSTRUCTIONS
NOTE: Refer to Installation Instructions, Information and Operation Guides regarding the
model you have purchased.
The MAXXFAN Dome fan is an exhaust fan only.
The MAXXFAN Dome fan installs into a 6 1/4 inch diameter opening.
To determine if your roof opening is correctly sized, simply remove the interior ceiling
garnish trim ring of your existing roof vent and measure the ceiling opening or verify the
opening is large enough by sliding the MAXXFAN Dome sleeve into the opening.
The MAXXFAN Dome is designed for a minimum roof thickness of 1 inch to a maximum of
6 inches.
The MAXXFAN Dome fan requires a minimum 12 Volt DC, 2 amp service. Confirm that the
circuit you intend to use will accommodate the additional load. Circuit must be fused and
use appropriate gauge stranded wire for electrical connections.
WARNING! TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY
TO PERSONS, OBSERVE THE FOLLOWING:
a) Use this unit in the manner intended by AIRXCEL, INC. If you have questions,
contact the manufacturer.
b) Before servicing or cleaning unit, switch power off at service panel and lock the
service disconnecting means to prevent power from being switched on
accidentally. When the service disconnecting means cannot be locked, securely
fasten a prominent warning device, such as a tag, to the service panel.
CAUTION! FOR GENERAL VENTILATION USE ONLY. DO NOT USE TO
EXHAUST HAZARDOUS OR EXPLOSIVE MATERIALS AND VAPORS.
P/N: 11A90041Z 08-09-2019

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INSTALLATION INSTRUCTIONS
WARNING! TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO
PERSONS, OBSERVE THE FOLLOWING:
Installation work and electrical wiring must be done by qualified persons(s) in accordance with
all applicable codes and standards, including fire-rated construction.
STEP 1
The MAXXFAN Dome fan requires a
minimum 6 1/4 inch diameter roof opening. If
you are replacing another type already
installed, remove the old existing roof vent.
Remove all old roof sealant for a minimum
of 2” entirely around the roof opening.
STEP 2
Prior to installing the MAXXFAN Dome in
the roof opening, apply a continuous strip of
BUTYL tape or equivalent to the underside
of the flange in the groove provided.
CAUTION! When installing your
MAXXFAN Dome fan, only use a
caulking/sealant compatible with the
flange (plastic product) and the roof
surface. DO NOT use materials
containing solvents such as or similar to
Xylene, Toluene, Methyl Ethyl Ketone
(MEK), Acetate or Acetone as they can
damage the flange. Also, Polysulfide
(Thiokol) type sealants must be avoided.
If in doubt, please contact the
manufacturer of your RV.
STEP 3
When inserting the MAXXFAN Dome fan
into the roof opening:
•orient the fan with the button toward
the front of the coach.
•ensure that the fan wires are hanging
to the inside of the coach.
Center the fan in the opening.
Using the eight (8) screws provided, attach
the flange to the roof at each dimple location
along the flange.
Note: Opening the fan lid gives better
access to the flange for assembling the
screws.
Screw into the dimple to pierce the flange,
making sure not to overtighten the screws to
avoid cracking the flange.
STEP 4
After the MAXXFAN Dome fan has been
installed, remove the excess BUTYL caulk
that may have squeezed out. Using a sealer
such as Dicor self-leveling lap sealant or
similar caulking, apply a daub over every
exposed screw head. In addition, apply a
bead (approximately 3/16” dia.) along the
outside edge of the flange all the way
around the fan.
THIS COMPLETES THE ROOF TOP
PORTION OF THE INSTALLATION

CAUTION! Disconnect main vehicle power before connecting 12
volt DC power to the MAXXFAN Dome exhaust fan.
STEP 5
•If the roof is thicker than 1 inch the extension sleeve must
be used.
•A roof that is 6 inches thick will use the full-length
extension sleeve without trimming.
•If the roof is between 1 inch and 6 inches, the extension
sleeve may need to be trimmed.
•Measure the distance from the vehicle ceiling to the base
of the MAXXFAN Dome fan. Cut the extension sleeve
longer than the dimension measured to accommodate the
depth of the garnish ring. Refer to table below for
additional length required.
NOTE: Mark and cut the extension sleeve per figure 5
shown above.
VEHICLE ROOF
THICKNESS
LENGTH TO ADD TO
CEILING THICKNESS
MEASUREMENT
LED
NON-LED
1 1/8 to 5 7/8 inch
15/16 inch
1/2 inch
VEHICLE
ROOF
THICKNESS
SLEEVE LENGTH TO CUTOFF
LED
NON-LED
6.0
NONE (use full
length sleeve)
NONE (use full
length sleeve)
1.0 inch
Not Applicable,
Sleeve not
used
Not Applicable,
Sleeve not used

STEP 6 Non-LED MAXXFAN Dome
Using the supplied wire splices, connect the
Positive (+) 12VDC supply wire to the
MAXXFAN Dome fan wire marked “POS
12VDC” and the Negative (-) 12VDC supply
wire to the MAXXFAN Dome fan wire
marked “Neg. 12VDC”.
•If the sleeve is needed, insert the
sleeve into the garnish ring positioning
the notch in the sleeve to line up the
wiring.
•Raise the garnish ring to the ceiling
ensuring that the garnish ring is
centered over the fan opening.
•If using the sleeve, the sleeve will
overlap the base that extends in the
opening. This will help center the
garnish ring in the opening.
•Ensure that the wires are not pinched.
The wires should be routed on the
outside of the sleeve. The excess wire
should lay in the garnish ring to keep
them contained.
•Secure the garnish ring to the ceiling
with the four (4) screws provided in the
small parts package.
•Reconnect the main vehicle power to
the MAXXFAN Dome.
This completes the installation of
the MAXXFAN Dome exhaust fan.

STEP 7 LED MAXXFAN Dome
Using the supplied wire nuts, connect the
Positive (+) 12VDC supply wire to the
MAXXFAN Dome fan wire and the LED light
wire marked “POS 12VDC” and the
Negative (-) 12VDC supply wire to the
MAXXFAN Dome fan wire and the LED light
wire marked “Neg. 12VDC”.
•If the sleeve is needed, insert the
sleeve into the garnish ring positioning
the notch in the sleeve to line up the
wiring.
•Raise the garnish ring to the ceiling
ensuring that the garnish ring is
centered over the fan opening.
•If using the sleeve, the sleeve will
overlap the base that extends in the
opening. This will help center the
garnish ring in the opening.
•Ensure that the wires are not pinched.
The wires should be routed on the
outside of the sleeve. The excess wire
and wire nuts should lay in the garnish
ring to keep them contained.
•Secure the garnish ring to the ceiling
with the four (4) screws provided in the
small parts package.
•Reconnect the main vehicle power to
the MAXXFAN Dome.
This completes the installation of
the MAXXFAN Dome fan.

OPERATION OF YOUR
MAXXFAN Dome fan
•To open the MAXXFAN Dome lid push
the button on the handle to dis-engage
the clip and slide the handle up till the
clip engages the upper opening.
•To close the lid, push the button on the
handle to dis-engage the clip and pull
the handle down till the clip engages
the lower opening.
•Operation of your MAXXFAN Dome
simply entails pushing the ON/OFF
button on the fan to activate the
exhaust fan.
•The optional LED lighting on the
garnish ring is operated by the push
button on the garnish ring. The LED
lighting and fan operate independently
•Close the lid to impede infiltration of air
when exhaust fan is not in use.
•The MAXXFAN Dome fan should not
be operated with the lid closed.
USER INSTRUCTIONS SERVICING
Cleaning of your MAXXFAN Dome may be
achieved with mild soap and water only. The
screen can be removed for cleaning by
removing the four (4) screws.
Before removing the screen for cleaning,
ensure the fan is turned to the OFF position.
CAUTION: Do not operate the fan with
the screen removed.
The MAXXFAN Dome fan has a 5 amp
fuse. To access the fuse, turn the fuse cap
to the left to remove the cap. Replace the
fuse with a 5 amp, type GMA fast acting
fuse. Replace the fuse cap to secure the
fuse in the fuse holder.
Should you have questions, please contact
AIRXCEL / MAXXAIR VENTILATION
SOLUTIONS Customer Service at
316.832.4357.
For WARRANTY information, please visit
www.airxcel.com/maxxair.

PLACE CONSUMER LABEL HERE
For additional product information please visit www.AIRXCEL.com
AIRCEL, INC. –RV Products Division / MAXXAIR
3050 N. St. Francis St. ●Wichita, KS 67219 ●316.832.3400