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MASTERTEMP 125 Pool and Spa Heater Installation and User’s Guide
P/N 475114 Rev. F 8/2020
12 |
COMBUSTION AIR SUPPLY
For indoor installation, the heater location must provide sufficient air supply for proper combustion and
ventilation of the surrounding are in accordance with the European Standard Codes of Practice.
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 (12 in) of the floor for
combustion air, in accordance with the current European Standard Codes of Practice 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.
Table 4.
Air Supply Requirements Guide
for MasterTemp 125 Heater
Minimum Net Free Open Area for Each Opening*
(Square Inches/Centimeters)
Model
All Air From Inside Building
All Air From Outside Building
Combustion
Vent
Combustion
Vent
125
200 sq. in.
1290 cm
2
200 sq. in.
1290 cm
2
50 sq. in.
323 cm
2
.
50 sq. in.
323 cm
2
*
Area indicated is for one of two openings; one at floor level and one at the ceiling.
Corrosive Vapors and Possible Causes
Table 5.
CAUTION
Chemicals should not be stored near the
heater installation. Combustion air can
be contaminated by corrosive chemical
fumes which can void the warranty.
WARNING!
Fire Hazard. Do not run the heater vent into a common vent with any other appliance. Do not run the Special
Gas Vent into, through, or within any active vent such as a factory built or masonry chimney.
Area
Likely Contaminants
Chlorinated swimming
pools and spas
Pool or spa cleaning chemicals. Acids, such as hydrochloric or muriatic acid.
New construction and
remodeling areas
Glues and cements, construction adhesives, paints, varnishes, and paint and
varnish strippers. Waxes and cleaners containing calcium or sodium chloride.
Beauty parlors
Permanent wave solutions, bleaches, aerosol cans containing chlorocarbons or
fluorocarbons.
Refrigeration plants or
various industrial finishing
and processing plants
Refrigerants, acids, glues and cements, construction adhesives.
Dry cleaning and laundry
areas
Bleaches, detergents, or laundry soaps containing chlorine. Waxes and cleaners
containing chlorine, calcium or sodium chloride.
Section 1. Installation
HORIZONTAL OR VERTICAL VENTING - USING SINGLE-WALL STAINLESS GAS
VENT
(SEE FIGURES 17, 18, 19 ON PAGE 15 & FIGURE 20 ON PAGE 16)
Vent the heater either horizontally or vertically using an optional vent adapter of the 150 mm (6 in) or 102 mm (4 in) special
gas approved
stainless steel
vent pipes.
Installation must be in accordance with all local codes and ordinances/or the latest
edition of the local code standards and/or local codes. The heater, when installed, must be electrically grounded and bonded
in accordance with local codes.
Do not use a draft hood with this heater. Install the vent according to the vent manufacturer’s
detailed instructions.
Note:
Keep a 150 mm (6 in) minimum clearance between the vent pipe and combustible surfaces. Follow
the vent manufacturer’s instructions and code requirements. Do not place any insulating materials around the vent or inside
the required clear air space surrounding the vent. See Table 20 on page 16
for maximum permissible vent lengths.
CONTINUE TO NEXT PAGE.