Combustion Air Supply - Pentair MT125 Installation And User Manual

After installation, installer must check for correct and safe operation of the heater.

COMBUSTION AIR SUPPLY

For indoor installation, the heater location must provide sufficient air supply for proper combustion and ventilation
of the surrounding area (in accordance with AS/NZS 5263.1.12:2019.The minimum 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 30 cm (12 in) of the ceiling, the other within 30 cm (12in) of the floor for combustion air, in accordance with the
AS/NZS 5601.1 as applicable, and any local codes that may apply. These openings shall directly, or through duct,
connect to outdoor air.
Pentair does not recommend indoor installations that do not provide combustion air from outside the building.
Minimum Net Free Open Area for Each Opening*
Model
125
*
Area indicated is for one of two openings; one at floor level and one at the ceiling.
Chemicals should not be stored near the heater installation. Combustion air can be contaminated by corrosive
chemical fumes which can void the warranty.
Corrosive Vapors and Possible Causes
Area
Chlorinated swimming
pools and spas
New construction and
remodeling areas
Beauty parlors
Refrigeration plants or
various industrial fin-
ishing and processing
plants
Dry cleaning and laundry
areas
460906 Rev. D 8/2020
Air Supply Requirements Guide the MasterTemp 125 Heater
(Square Inches/Centimeters)
All Air From Inside Building
Combustion
200 sq. in. 200 sq. in.
Table 8.
1290 sq. cm. 1290 sq. cm.
Pool or spa cleaning chemicals. Acids, such as hydrochloric or muriatic acid.
Glues and cements, construction adhesives, paints, varnishes, and paint and var-
nish strippers. Waxes and cleaners containing calcium or sodium chloride.
Permanent wave solutions, bleaches, aerosol cans containing chlorocarbons or
fluorocarbons.
Refrigerants, acids, glues and cements, construction adhesives.
Bleaches, detergents, or laundry soaps containing chlorine. Waxes and cleaners
containing chlorine, calcium or sodium chloride.
Section 1. Installation Instructions
NOTE
All Air From Outside Building
Vent Combustion
50 sq. in.
323 sq. cm.
CAUTION
Likely Contaminants
MASTERTEMP 125 Pool and Spa Heater Installation and User's Guide
Vent
50 sq. in.
323 sq. cm.
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