Pentair MT125 - Page 25

460906 Rev. D 8/2020 MASTERTEMP 125 Pool and Spa Heater Installation and User’s Guide
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Figure 19. – Typical Metal Vent Pipe Installation (Vertical Venting)
4. Install vent pipe so that it can expand and contract
freely as the temperature changes. Support the vent
pipe according to applicable codes and the vent
manufacturer’s instructions. Pipe support must
allow the vent pipe free movement out and back,
from side to side, or up and down as necessary,
without putting a strain on the heater or vent body.
Slope horizontal pipe down to condensate trap
at least 2 cm per meter (1/4 in per foot). Install
approved condensate drains at low points where
condensate might collect. Plumb condensate drains
to a drain through hard piping or high temperature
tubing such as silicone rubber or EPDM rubber
– do not use vinyl or other low temperature
tubing. Follow drain manufacturer’s installation
instructions.
5. Use approved re stop for oor and ceiling penetrations. Use approved thimble for wall penetrations. Use a approved
roof ashing, roof jack, or roof thimble for all roof penetrations. Do not ll the space around the vent (that is, the
clear air space in the thimble or re stop) with insulation. The roof opening must be located so that the vent is
vertical.
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 and local code standards.
WARNING
Fire Hazard. Do not vent the heater directly into a masonry chimney. Installation into a masonry chimney must use a chimney
liner which must meet local code standards and all local code requirements.
WARNING
Risk of fire, carbon monoxide poisoning, or asphyxiation. It is recommended to use a CO Monitor and Fire Alarm in rooms
that contain gas fired appliances.
NOTE
After installation, installer must check for correct and safe operation of the heater.
6. Donotruntheheaterventintoacommonventwithanyotherappliance.
Approved
Te rmination
Cap
Storm Collar
Flashing
Firestop
Vent
Body
Metal Flue
Collar
Double Wall
Metal Vent Pipe
SupportVertical
Vent Pipe so
adapter does not
takeweight of
pipe. Dispose
of condensate
according to
local codes.
Double Wall
Metal Vent Te e
Condensate
Drain w/trap
500mm (min.)
* See note (C)
15 cm (6 in) min.
Clearamce to Combustible
materials
Section 1. Installation Instructions