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20
Note (*): Combustion Air Intake Duct Connection Kit (Part Number 461031) for all MasterTemp heater models can be
purchased separately. See page 52 for parts list.
Each 90-degree elbow reduces the maximum horizontal PVC air intake duct run by 12 feet and each 45-
degree elbow in the PVC air intake duct run reduces the maximum run by 6 feet. See the Table 5 above for
the maximum lengths using 90-degree elbows.
Corrosive Vapors and Possible Causes
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MASTERTEMP
Pool and Spa Heater Installation and User's Guide
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NOTE
CAUTION
Chemicals should not be stored near the
heater installation. Combustion air can
be contaminated by corrosive chemical
fumes which can void the warranty.
s
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Table 6.
Section 3. Installation Instructions
Combustion 3 in. PVC Pipe
Inlet Air Intake Duct Requirements*
Combustion Air Intake 3 in. Pipe
(Vertical or Horizontal)
No. of 90° Elbows Maximum Length in Feet (M)
0
70 ft. (21.3 M)
1
58 ft. (17.7 M)
2
46 ft. (14.0 M)
3
34 ft. (10.4 M)
4
22 ft. ( 6.7 M)
Table 5.
WARNING!
DO NOT USE PVC PIPE FOR FLUE
EXHAUST VENT. FLUE EXHAUST
VENT TEMPERATURES CAN BE IN
EXCESS OF 400° F. FLUE EXHAUST
VENT MUST BE CATEGORY I or
CATEGORY III METAL VENT.
Rev. M 1-8-15
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