Pentair Pool Products MASTERTEMP 250K BTU/HR Installation And User Manual page 11

NOTICE: Combustion air contaminated by corrosive
chemical fumes can damage the heater and will void the
warranty (See Table 1 below).
HEATER CLEARANCES –
OUTDOOR SHELTER (Canada) or INDOOR (U.S.)
The following clearances must be maintained from com-
bustible surfaces:
TOP......................................3 ft. (1 m)
EXHAUST SIDE ................6 in. (15 cm)
HEADER SIDE...................18 in. (.5 m)
DOOR PANELS* .............12 in. (30 cm)
Note (*) For service access it is recommended to leave at
least 24 in. clearance for one of the door panels.
The heater is design certified by CSA International for
installation on combustible flooring. For installation on
carpeting, the heater must be mounted on a metal or
wood panel that extends at least three inches (10cm)
beyond the base of the heater. If the heater is installed
in a closet or alcove, the entire floor shall be covered by
the panel. On an outdoor shelter installation, the exhaust
discharges into a vent pipe. Orient the heater so that the
vent pipe does not interfere with adjustment of the operat-
ing controls. The control panel located on the top panel can
be rotated to any of the three sides of the heater for easy
access. However, the control panel must not be located on
the side where the vent is located.
Table 1: Corrosive Vapors and Possible Causes
Area
Chlorinated swimming
pools and spas
New construction and
remodeling areas
Beauty parlors
Refrigeration plants or
various industrial
finishing and processing
plants
Dry cleaning and
laundry areas
COMBUSTION AND VENTILATION AIR SUPPLY
For shelter installation, the heater requires air supply open-
ings for ventilation and combustion. The minimum require-
ments are for two (2) openings: one 12 inches (30cm)
Likely Contaminants
Pool or spa cleaning
chemicals. Acids, such as
hydrochloric or muriatic acid
Glues and cements,
construction adhesives,
paints, varnishes, and
paint and varnish 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
from the ceiling for ventilation air and one 12 inches
(30cm) from the floor for combustion air, in accordance
with the latest edition of ANSI Z223.1, or the National Fuel
Gas code, the CSA B149.1, Natural Gas and Propane
Installation Codes, as applicable, and any local codes that
may apply.
The minimum net free area in square inches are as follows:
Table 2: Combustion and Ventilation Air Requirements
All Air From
Inside Building
Model Combustion
100 sq. in.
200
645 sq. cm. 645 sq. cm. 323 sq. cm. 323 sq. cm.
125 sq. in.
250
807 sq. cm. 807 sq. cm. 403 sq. cm. 403 sq. cm.
150 sq. in.
300
969 sq. cm. 969 sq. cm. 485 sq. cm. 485 sq. cm.
200 sq. in.
400
1290 sq. cm. 1290 sq. cm. 645 sq. cm. 645 sq. cm.
OUTDOOR SHELTER VENT INSTALLATION
(Canada) or INDOOR INSTALLATION (U.S.)
Always vent the heater to the outdoors.
• Vent it horizontally or vertically using a Special Gas
Vent, (see Table 4, Page 14), or
• Vent it vertically using Type "B" double wall vent con-
nector pipe.
Locate the heater so as to minimize the length of hori-
zontal venting and the number of vent elbows required.
Horizontal vent runs must slope up 1/4" per foot (2cm/M)
from the heater to allow exhaust condensate to drain and
must have a condensate drain as described in the venting
installation instructions.
V V Vent Bod y y
Clean and RTV
This Surface
Combustion
Chamber
Flue Collar
FIGURE 11: Flue Collar
11
All Air From
Outside Building
Vent Combustion
100 sq. in. 50 sq. in.
125 sq. in. 63 sq. in.
150 sq. in. 75 sq. in.
200 sq. in. 100 sq. in.
Clean the Interior Surface
4" x 8" Metal
Flue Collar
Vent
50 sq. in.
63 sq. in.
75 sq. in.
100 sq. in.
Vent Pipe