Section III. Installation | 16 | |
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COMBUSTION AIR SUPPLY
For indoor installation, the heater location must provide sufficient air supply for proper combustion and ventilation of the surrounding area.
The requirements for the air supply specify that the room in which a heater is installed should be provided with two permanent air supply openings; one within 12 inches of the ceiling, the other within 12 inches of the floor. These openings shall directly, or through duct, connect to outdoor air.
Pentair Water Pool and Spa, Inc. does not recommend indoor installations that do not provide combustion air from outside the building.
Air Supply Requirements Guide for MiniMax NT LN Heaters
Net Free open Area for
Each Opening * (Square Inches)
Heater | Ducted from | Direct from |
Size | Outside | Outside |
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200 | 100 | 50 |
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250 | 125 | 63 |
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300 | 150 | 75 |
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400 | 200 | 100 |
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*Area indicated is for one of two openings; one at floor level and one at the ceiling.
NOTE: If using louvered type or screen type openings, check with Louver/Screen Manufacturers to correct for the Louver/Screen resistance.
Table 10.
CAUTION
Chemicals should not be stored near the heater installation. Combustion air can be contaminated by corrosive chemical fumes which can void the warranty.
VENT ADAPTORS
(FITS ALL MODELS)
The proper vent adaptor must be installed on the heater as shown below in Figure 9.
Product No. | Vent Dia. |
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460506 | 4 in. |
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460507 | 5 in. |
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Vent
Adaptor
1.Remove the six (6) retaining screws from the old exhaust grill and discard the screws, gasket, and exhaust grill as shown in Figure 10.
EXHAUST GRILL
SCREWS (6)
GASKET
Figure 10.
2.Install the Vent Adaptor as shown in Figure 11. Make sure the holes in the gasket, metal flange of the main vent assembly, and heater cover are aligned before securing into place using the six (6) screws provided in the Vent Adaptor Kit.
METAL FLANGE
SCREWS (6)
GASKET
Figure 9. | Figure 11. |
P/N 472089 | Rev. E |