Thetford N300 - Manuel (Page 11)

Installation and Owner’s Manual 11
Assemble the Enclosure
1. Make sure the enclosure is 29.75 - 29.88 inches high x 20.50
- 20.63 inches wide x 21.38 inches deep.
2. Make sure the floor is solid and level.
- The floor must be metal or a wood panel and extend the full
width and depth of the enclosure.
- The floor must be able to support the weight of the
refrigerator and its contents.
3. Make sure there are no adjacent heat sources such as a
furnace vent, a hot water heater vent, etc.
4. If there is more than 1/2 inch between either side of the
refrigerator and the inside of the enclosure:
- Fill the space with fiberglass (batt-type) insulation or add a
baffle to eliminate the clearance.
- The rear of the batt-type insulation must be between 14
-15 inches from the face of the enclosure.
- Securely attach the batt-type insulation to the enclosure,
so that it remains in this position during refrigerator
installation, if it becomes wet, and in windy conditions.
Install the Lower and Upper Vents
1. Using the following chart, decide which vents and rough
opening (RO) sizes to use.
Certified Vent P/N RO Height RO Width
Upper Roof 622293 24 in. 5 1/4 in.
Exhaust Vent
Upper Side 617485 7 1/4 in. 18 in.
Exhaust Vent
Lower Side 617484 9 3/4 in. 19 3/8 in.
Intake Vent
Universal Upper 620505 6 3/16 in. 17 15/16 in.
and Lower Vent
2. Install the lower intake vent (See Art01629):
NOTE: The lower intake vent is also the service access opening
for the components on the rear of the refrigerator.
Ventilation Requirements
WARNING: The completed installation must:
- Make sure there is sufficient intake of fresh air for
combustion.
- Make sure the living space is completely isolated from
the combustion system of the refrigerator.
- Make sure there is complete and unrestricted ventilation
of the flue exhaust which, in gas mode, can produce
carbon monoxide. The breathing of carbon monoxide
fumes can cause dizziness, nausea, or in extreme
cases, death.
- Make sure the refrigerator is completely isolated from its
heat generating components through the correct use of
baffles and panel construction.
Certified installation needs one lower intake vent and one upper
exhaust vent. Install the upper exhaust vent either through the
roof or through the side wall of the vehicle exactly as written
in this manual. Any other installation method voids both the
certification and the factory warranty of the refrigerator.
The bottom of the opening for the lower intake vent, which is also
the service access door, must be even with or immediately below
the floor level. This allows any leaking propane gas to escape to
the outside and not to collect at floor level.
CSA International certification allows the refrigerator to have
zero (0) inch minimum clearance at the sides, rear, top, and
bottom. While there are no maximum clearances specified for
certification, the following maximum clearances are necessary for
correct refrigerator performance:
Bottom 0 inch min. 0 inch max.
Each Side 0 inch min 1/4 inch max.
Top 0 inch min. 1/4 inch max.
Rear 0 inch min. 1 inch max.
These clearances plus the lower and upper vents cause the
natural air draft that is necessary for good refrigeration. Cooler
air comes in through the lower intake vent, goes up around the
refrigerator coils where it removes the excess heat from the
refrigerator components, and goes out through the upper exhaust
vent. If this air flow is blocked or decreased, the refrigerator will
not cool correctly.
Each NORCOLD model is certified by CSA International for
correct ventilation. Install only the certified vents that are listed in
this manual.
All propane gas supply piping and fittings must obey local, state,
and national codes about type and size. These components
must also obey the current NFPA 501C section 2-4, and in
Canada with the current CAN 1-6.10 Standard.
!