Pentair MiniMax Guide D'installation Et D'utilisation page 36

PowerMax (contd.)
3 6
VENTING
The vent pipe must be the same size or larger than what is indicated in Table 1p, page A-9. The Commercial
PowerMax heaters are side discharged and are capable of a 360-degree discharge rotation and operate with a
positive vent static pressure and with a vent gas temperature less than 400 F. The total length of the horizontal run
must not exceed an equivalent of 35 feet for model 525, 30 feet for model 750, and 25 feet for model 900. For all
cases, each 90-degree elbow reduces the maximum horizontal vent run by 5 feet and each 45-degree elbow in the
vent run reduces the maximum vent run by 2 feet. The Commercial PowerMax induced-draft pool and spa heater
uses positive pressure to push flue gases through the vent pipe to the outside. This requires a completely sealed vent
system--single wall vent pipe with sealed-seams and joints may be used. Flue gases under positive pressure may
escape into the dwelling with any cracks or loose joints in the vent pipe, or improper vent installation. It
is recommended that vent runs over 18 feet be insulated to reduce condensation related problems and/or the use of
a condensate trap in the vent run close to the heater may be necessary in certain installation such as cold climates.
The Commercial PowerMax is suitable for through-the-wall venting. (Refer to page A-13).
Recommended sources for Side-wall vent hood terminals include: The Field Controls Co. {2308 Airport Road,
Kingston, NC 28501, (800) 742-8368} and Tjernlund Products Inc. {1601 Ninth Street, White Bear Lake, MN
55110, (800) 255-4208}--consult manufacturer for model information and availability.
CAUTION
Do NOT combine exhaust pipes to a common exhaust in multiple unit installations. Run separate vent pipes.
A-12
P/N 470880 Rev. K 5-31-06