Cruisair Cuddy dc Installation And Operation Manual Download

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English

L-2028 Installation

These space allowances are suggested minimums. Enough
space should be allocated for installation and serviceability.
See Figure 2 at the back of this manual for space allowances
and unit dimensions.

How It Works

The air conditioning unit consists of four main components
and a refrigerant gas circulating through the system. The
BLOWER draws warm cabin air across the fins on the
EVAPORATOR where the heat from the air is transferred to
the refrigerant in the evaporator coil. As the refrigerant
evaporates from a liquid into a gas it absorbs the heat from
the cabin air. The COMPRESSOR then compresses the
refrigerant gas and pumps it through the outer tube in the
CONDENSER COIL. The seawater pump circulates cool
seawater through the inner tube in the condenser coil, this
cools the refrigerant in the outer tube and condenses it from a
gas into a liquid. The heat from the refrigerant is exchanged to
the seawater and discharged overboard. The liquid refrigerant
is then passed through the EVAPORATOR COIL and the
cycle repeats. Removing heat from the cabin air lowers its
temperature. The cooled air is blown through the ducting and
out the supply air grill(s). See Figure 3 at the back of this
manual for component identification.

Mounting Brackets

The air conditioning unit is supplied with a base pan that also
serves as a condensate pan. Mounting clip brackets and
screws (4) are provided to secure the base pan onto a flat,
horizontal surface. See Figure 4 at the back of this manual.

Condensate Drains

The condensate drain pan is 1¾" high with two drain loca-
tions. During conditions of high humidity, condensate may be
produced at a rate of approximately ½ gallon (1.9 liters) per
hour. With this in mind, it is important to route condensate
drains downward to a sump pump. It is not recommended to
route condensate drains to the bilge. After the condensate
drain installation is complete, test the installation by pouring a
quart of water into the pan and checking for good flow.

For installation of the condensate drain (refer to Figure 5 at
the back of this manual):

1. Remove the aft facing watertight plug from the base pan

of the air conditioning unit.

2. Slip the solid washer and the liquid-seal washer onto the

PVC fitting in that order.

3. Connect the fitting through the exposed hole in the base

pan with the locking nut.

4. Securely tighten with two (2) wrenches to provide a

proper seal.

5. Attach a 5/8" (16mm) I.D. reinforced hose to the hose

barb and secure with stainless steel hose clamps.

6. Install the condensate drain hose downhill from the unit

and aft to a sump - hose should have a trap.

7. Two drain fittings may be used and the hoses teed

together provided there is a minimum 2" (51mm) drop
from the bottom of the base pan to the tee connection.

Note:

Do not terminate condensate drain line within 3 feet (91cm) 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.

Blower Assembly

Horizontal or vertical supply air discharge may be acheived by
rotating the blower. Its design allows the blower to be rotated
by removing the screws holding the blower plate to the
evaporator coil shroud. Rotate the blower to allow the most
direct flow of air to the supply air grill.

To rotate the 10-16K

blowers, remove the two plastic plugs for access to the
mounting screws.

Supply & Return Air Grills

and Transition Boxes

As previously indicated, install the supply air grille(s) as high
as possible and the return air grille as low and close to the air
conditioning unit as possible to insure direct uninterrupted
airflow to the evaporator. In no instance should the supply are
grille discharge be directed towards the return air grille, as this
will cause the system to short cycle.

The cut out for the 3" (76mm) round supply air grille for the
3.5K unit is 3" (76mm) in diameter and the flange is 3

(99mm) in diameter. The cut out for the 4" (102mm) round
supply air grille for the 5K unit is 4" (102mm) in diameter and
the flange is 5½" (140mm) in diameter. The cut out for the
rectangular supply air transition box used with the 10 & 12K
units is 11

" (295mm) by 5

" (148 mm) and for the 16K unit

it is 13

" (346mm) by 5

" (148 mm). Connect the 6"

(152mm) or 7" (178mm) oblong duct ring to the transition box
by first placing the ring on the box and tracing the hole. Cut
the oblong hole out of the box. Secure the ring to the box with
rivets (trim ¼" [6mm] from ring flanges if necessary). Com-
pletely seal the joint between ring and box with silicone. A
minimum clearance of 3" (76mm) plus the duct diameter size
is required behind the grille for attaching the ducting (see
earlier section, “

Spacing Allowance and Unit Dimensions”).

The cut outs for the return air grilles are as follows: 7-5/8"
(194mm) square for the 3.5K & 5K units, 11-5/8" (295mm)
square for the 10K & 12K units, and 13-5/8" (346mm) x 11-5/
8" (295mm) (width x height) for the 16K unit. The return air
grille should have a minimum of 4" (107mm) of clearance in
front of it, free from any furniture or other obstructions. The
return air filter, mounted to the front of the evaporator,