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installation
FIGURE 2. Blower rotation
Mount unit with condenser/evaporator coil directly
behind return air grill or with at least 3" (76mm) of
air circulation clearance if adjacent to a bulkhead or
other obstructions. See Figure 3. Compressor should
be mounted away from return air grill if possible to
minimize sound level in cabin.
mounting brackets
The four mounting brackets provided should be
placed around edge of drain pan as equally spaced
as possible. Secure a/c unit to a flat level mounting
surface. Brackets with vibration isolators and sleeves
are provided. Customer is to supply screw or bolts.
See Figure 4.
condensate Drain
For installation of the condensate drain please see
Figure 4 and follow these instructions:
1. Remove the aft-most-facing drain pan slug (knock-
out) from the drain pan. To do this, use the supplied
fitting by inserting the hose barb side into the drain
hole and, with one quick strike of a rubber mallet,
knock out the slug. Remove slug from pan.
2. Screw supplied 1/2" (12.7mm) NPT PVC hose barb
into the threaded drain hole and tighten it securely.
3. Attach reinforced 5/8" (15.9mm) I.D. hose to the
hose barb and secure it with a stainless steel hose
clamp.
7
Dometic turbo a/c systems
4. Route condensate drain hose to a sealed conden-
sate or shower sump pump (see note below).
5. Drain hose must be routed downward to allow
water to flow via gravity downhill.
Very important! Do not terminate condensate
drain line within 3' (.91M) of any outlet of engine or
generator exhaust systems, nor in a compartment
housing an engine or generator, nor in a bilge, unless
the drain is connected properly to a sealed conden-
sate or shower sump pump. If drain line is not properly
installed, then dangerous fumes may travel up drain
line and contaminate living quarters.
air Filters
Air filters are necessary to remove air borne particu-
lates from the cabin air and to keep the evaporator coil
clean. One, and only one, air filter must be installed
for each air conditioner unit. Install the air filter either
on the a/c unit or in the return air (RA) grill. The a/c unit
air filter mounts in the slots in front of the evaporator
coil (behind the condenser coil). Or, the return air filter
attaches to the back of the RA grill. Clean the air filters
regularly per instructions in Owner's Control Manual.
Grills and transition boxes
Install the supply air grill as high as possible in a loca-
tion that will provide uniform air distribution through-
out the cabin; grill louvers should be directed upward.
The return air grill should be installed as low and close
to the a/c unit as possible to insure direct uninterrupt-
ed airflow to the evaporator. The return air grill should
have a minimum four inches 4"(101.6mm) of air circu-
lation clearance in front of it, free from any furniture or
other obstructions. See Figure 3.
In no instance should a supply air discharge be
directed towards a return air grill, as this will cause
the system to short cycle. Allow for adequate clear-
ance behind the supply air grill(s) for the transition box
and ducting connection. See Figure 5 for minimum
grill sizes.
Ducting
Good airflow is critical for the performance of the
entire system. It is highly dependent on the quality
of the ducting installation. The ducting should be run
enGlisH
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