Pentair 175K BTU/HR Installation And User Manual page 22

22
The allowable vent runs for each vent pipe diameter are different and can not be exceeded.
Each 90-degree elbow reduces the maximum horizontal vent run by 12 feet and each 45-degree elbow in
the vent run reduces the maximum vent run by 6 feet. See Table 7 on page 21 for the maximum vent lengths
using 90-degree and 45-degree elbows.
2. Install the metal Flue Collar in the Vent Body
of the heater (located under the outside vent
cover). Fasten the metal Flue Collar to the Vent
Body with two #10 sheet metal screws. Use
high temperature silicone RTV to seal the Flue
Collar to the Vent Body. Before connecting
the metal Flue Collar to the Vent Body, wet a
clean cloth or paper towel with isopropyl alcohol
(rubbing alcohol) and vigorously wipe the socket
of the Vent Body. Immediately wipe the
cleaned surfaces dry with a clean cloth or
paper towel. Repeat for the exterior of the 4"
end of the metal Flue Collar. Attach the metal
Flue Collar to the Vent Body using the RTV
supplied with the kit, following the vent
manufacturer's instructions (included with kit).
3. Attach the vent pipe to the metal Flue Collar
with sheet-metal screws.
WARNING
Risk of fire or asphyxiation if vent is not
assembled according to manufacturer's
instructions or if vent parts from different
manufacturers are mixed. Vent parts from different
manufacturers ARE NOT interchangeable. Mixing
parts from more than one manufacturer may cause
leaks or damage to vent. When assembling a vent,
pick one manufacturer and be sure that all vent parts
come from that manufacturer and are specified by
the manufacturer for your system. Follow
manufacturer's instructions, local code requirements,
National Fuel Gas Code requirements (U.S.) or
standards CSA B149.1 and B149.2 (Canada)
carefully during assembly and installation.
®
MASTERTEMP Pool and Spa Heater Installation and User's Guide
Section 3. Installation Instructions
NOTE
Min. 10 Ft.
6" Minimum
Clearance to
Combustible
Materials
Class B Double Wall
Metal Vent Pipe
Metal Flue
Collar
Vent
Body
Typical Metal Vent Pipe Installation - U.S.
Figure 12. –
(Vertical – Negative Pressure)
Min. 2 Ft.
Min. 10 Ft. (3.3 M)
(.7 M)
6" (15 cm) Minimum
Clearance to Combustible
Materials
Type B Double Wall
Metal Vent Pipe
Vent
Body
Condensate
Drain w/trap
Typical Metal Vent Pipe Installation - Canada
Figure 13. –
(Vertical – Negative Pressure)
Listed
Termination
Cap
Storm Collar
Flashing
Firestop
Support Vertical
Vent Pipe so
adapter does not
take weight of
pipe.
Listed
Termination
Cap
Storm Collar
Flashing
Firestop
Metal Flue
Type B Double Wall
Collar
Metal Vent Tee
Support Vertical
Vent Pipe so
adapter does not
take weight of
pipe. Dispose
of condensate
according to
local codes.
Rev. M 1-8-15