Dometic 641515.301 Installation Instructions Manual page 7

FIG. 10
Step b
Use As
Packaged
b. If distance is 3"-4", install ducts as received.
See FIG. 10.
c. If distance is 4"-6", use optional 318556.000
Duct Adaptor and 3100895.006 Bolt Kit.
7. Install ceiling template by sliding lower duct over
upper duct. See FIG. 11.
FIG. 11
Unit Return Air
Opening
Hold Ceiling Template With
One Hand And Install 3
Mounting Bolts Finger Tight
8. Hold the ceiling template with one hand and with
the other, install the three (8" x 1/4-20) mount-
ing bolts through the template and into the base
pan.
a. Finger-tighten the bolts and check alignment.
There should be an equal opening on each
side and the rear fl ange must be tight against
the roof opening.
b. EVENLY tighten the three bolts to a torque
of 40 to 50 inch pounds. This will compress
the roof gasket to approximately 1/2". The
bolts are self locking so over tightening is
not necessary.
Upper Discharge
Air Duct
Step a
Remove At
Perforation
Lower Discharge
Air Duct
Slide Lower Air
Discharge Duct
Over Upper Duct
Roof Gas-
ket
641515, 641516, 641535, 651515 & 651516 Installation Instructions
If bolts are left loose there may not be an ad-
equate roof seal or if over tightened, damage
may occur to the unit base or ceiling template.
Tighten to torque specifi cations listed in this
manual.
H. Wiring The System
Reach up into the return air opening and pull the re-
maining wires down.
1. Connection Of Low Voltage Wires
Disconnect the positive (+) 12 volt DC terminal
at the supply battery. Damage to equipment
could occur if the 12 volt DC is not shut off.
a. Route Remote Temperature Sensor cable, if
applicable, and attach it to the connector that
matches its color in the control box.
b. Connect the previously run 12 VDC to the red
and black wires protruding from the control box.
(In multiple zone installations, this needs to be
done at only one zone.) Connect +12 VDC to
the red wire; –12 VDC to the black wire.
c. Connect the previously run furnace thermostat
wires (if applicable) to the blue wires protrud-
ing from the control box. The polarity of these
connections does not matter.
d. Connect the previously run Energy Manage-
ment System wires (if applicable) to the yellow
wires protruding from the control box. The po-
larity of these connections does not matter.
e. Terminate the 4-conductor control cable(s)
protruding into the 14-1/4" x 14-1/4" (±1/8")
roof opening. The cable(s) must be terminated
with a telephone RJ-11-6C4P connector. Refer
to the crimp tool manufacturer for crimping
instructions.
Important:
RJ-11-6C4P connectors must be installed
as shown in FIG. 4, 5 & 6.
f. Plug the control cable(s) into the telephone
jack(s) on the control box. (It does not matter
which one.)
g. Locate the ambient sensor plug coming from
the unit, and attach it to the connector that
matches its color on circuit board in the control
box.
2. Connection Of 120 Volt Power Supply
Disconnect 120 volt AC. Failure to follow
these instructions could create a shock haz-
ard causing death or severe personal injury.
7