Installation - USSC Cavalier A9843L Installation And Operation Instructions Manual

The following formula can be used to determine the maximum
heater rating per the definition of unconfined space:
BTU/HR = (L1+L2) Ft x (W) Ft x (H) Ft x 1000
Consider two connecting rooms with an open area between,
with the following dimensions:(See Fig. 2, Example)
L1=15-1/2 Ft., L2=12 Ft., W=12 ft., H=8Ft
=52800 BTU/HR
If there were a door between the two rooms the calculation
would be based only on the room with the heater.
BTU/HR=(15-1/2) x (12) x (8) x 1000
=29760 BTU/HR
When installing the appliance directly on carpeting, tile or other combustible
material, other than wood flooring, the appliance must be installed on a metal or
wood panel extending the full width and depth of the appliance.
If the area in which the heater may be operated is smaller than that defined as an
unconfined space or if the building is of unusually tight construction, provide
adequate combustion and ventilation air by one of the methods described in the
National Fuel Gas Code, ANSI Z223.1, Section 5.3, or applicable local codes.
Ensure the minimum clearances shown in FIGURE 4 are maintained for
accessibility for purposes of servicing and proper operation. Left and right
clearances are determined when facing the front of the heater.
FIGURE 3. Minimum Clearances
50
50
50
36"
8"
8"
42"
L2 (12')
Top of heater....................................36"
Sides of heater....................................8"
4"
Front of heater..................................42"
Rear of heater.....................................4"
7

INSTALLATION

L1 (15-1/2')
FIGURE 2.
Maintain these clearances to
ensure adequate space
around air opening for
proper operation.
Minimum clearances to combustibles:
H (8')
W (12')