Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS - Manual (Page 8)

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CAUTION: Some pleated filters are too
restrictive and could cause air flow problems.
For convenience and flexibility, you can direct the combustion air
inlet from either the back or right side of the pool heater. To
arrange the combustion air inlet for side entry, follow the steps
below.
1. Remove the metal panel from the pool heater’s side wall
(see Figure 4).
2. Remove screws from the air filter/bracket assembly.
3. Move the filter/bracket assembly from the rear of the pool
heater to the side opening (see Figure 5).
4. Attach the filter/bracket assembly to the pool heater’s side
using the pre-drilled screw holes.
5. Attach the metal panel to the rear combustion air opening
to seal it off.
Figure 4 – Metal Panel Covering Side Combustion Air Inlet
Figure 5 – Moving Air Filter/Bracket Assembly from Rear
of Pool Heater to Side
Combustion Air Options
This pool heater has four combustion air options.
1. Outside Combustion Air, No Ducts
You can direct outside combustion air to this pool heater using
either one or two permanent openings.
One Opening
The opening must have a minimum free area of one square
inch per 3000 Btu input (7cm
2 per kW). You must locate this
opening within 12" (30cm) of the top of the enclosure.
Figure 6 – Outside Combustion Air - Single Opening
Two Openings
The combustion air opening must have a minimum free area of
one square inch per 4000 Btu/hr input (5.5cm
2 per kW). You
must locate this opening within 12" (30cm) of the bottom of
the enclosure.
The ventilation air opening must have a minimum free area of
one square inch per 4000 Btu/hr input (5.5cm
2 per kW). You
must locate this opening within 12" (30cm) of the top of the
enclosure.
Commercial Pool Heaters
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