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MASTERTEMP
™
Pool and Spa Heater Installation and User’s Guide P/N 475106 Rev. D 1/2016
16
| Section
NOTE *: Vent must be at least 2.4 m (8 ft) away from
nearest vertical surface. Vents extending 1.5 m (5 ft)
or more above the roof must be braced or guyed.
Consult your local code officials for detailed information.
CAUTION
Chemicals should not be stored near the heater
installation. Combustion air can be contaminated by
corrosive chemical fumes which can void the
warranty.
Table 4.
FLUEING MUST BE IN ACCORDANCE WITH EUROPEAN STANDARD CODES OF PRACTICE. Always vent
the heater to the outdoors (see above
NOTE
*). Vent the heater vertically using double wall vent connector pipe. Locate the
heater so as to minimize the length of horizontal venting and the number of vent elbows required. Horizontal vent runs
must slope to allow exhaust condensate to drain and it is recommended to have a condensate drain as described in the
venting installation instructions.
2. Installation
Combustion PVC Air Intake 76 mm (3”) Pipe
(Vertical or Horizontal)
No. of 90° Elbows
Maximum Length in Meters (Ft)
0
21 M (70 ft.)
1
18 M (58 ft.)
2
14 M (46 ft.)
3
10 M (34 ft.)
4
7 M (22 ft.)
914 mm
min. (36”)
305 mm
min. (12”)
152 mm
min. (6”)
305 mm min. (12”)
914 mm
min. (36”)
76 mm (3”) PVC pipe
Combustion Air Intake
76 mm (3”) PVC pipe
COMBUSTION AIR SUPPLY
(CONTINUED)
Air Supply Requirements Guide for MasterTemp
™
Heaters
Direct Air Intake Duct with 76 mm (3 in - UK) PVC Pipe (Indoor Installation)
VENT INSTALLATION –
INDOOR INSTALLATION OR OUTDOOR SHELTER
Figure 21.
For indoor heater installations where combustion air supply might be insufficient, the MasterTemp Heater is certified for a direct air
intake duct using a 76 mm (3 in - UK) PVC pipe (Pentair P/N 461031). If outside air is drawn through the PVC duct directly into the
heater, the PVC pipe can be installed in accordance with the following requirements: The air intake opening MUST be installed at least
30.5 cm (12 in.) above the roof line or normal snow levels for free air flow. The Category I or III exhaust vent termination cap must have
at least 1.8 m (6 ft.) minimum vertical clearance from air intake duct. (See Figure 21 below).
WARNING!
WARNING!
WARNING!
WARNING!
WARNING!
DO NOT USE PVC PIPE FOR FLUE EXHAUST VENT. FLUE EXHAUST VENT TEMPERATURES CAN BE IN EXCESS OF 204° C.
FLUE EXHAUST VENT MUST BE CATEGORY I or CATEGORY III METAL VENT.
NOTE
Each 90-degree elbow
reduces the maximum
horizontal PVC air
intake duct run by 3.6
m (12 ft.) and each 45-
degree elbow in the
PVC air intake duct
run reduces the
maximum run by 1.8
m (6 ft.). See the Table
above for the
maximum lengths
using 90-degree
elbows.
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
200
200 sq. in.
1290 cm
2
200 sq. in.
1290 cm
2
50 sq. in.
323 cm
2
50 sq. in.
323 cm
2
300
325 sq. in.
2097 cm
2
325 sq. in.
2097 cm
2
80 sq. in.
516 cm
2
80 sq. in.
516 cm
2
400
400 sq. in.
2580 cm
2
.
400 sq. in.
2580 cm
2
100 sq. in.
645 cm
2
100 sq. in.
645 cm
2
*
Area indicated is for one of two openings; one at floor level and one at the ceiling.