Indoor Venting-General Requirements - Pentair Pool Products MiniMax NT Series Operation & Installation Manual
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- Service manual (52 pages) ,
- Operation & installation manual (72 pages)
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Section III. Installation
INDOOR VENTING — General Requirements
The vent pipe must be the same size or larger. The MiniMax NT heaters 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 the length that is listed below in the tables.
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 8 feet and each 45-degree elbow in
the vent run reduces the maximum vent run by 4 feet. See the tables below for the maximum vent
lengths using 90-degree and 45-degree elbows.
The MiniMax NT is a "Category III" appliance and is an induced-draft pool and spa heater
which 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. Flue gases under positive pressure may escape into the dwelling with any cracks
or loose joints in the vent pipe, or improper vent installation. The vent pipe must be of a
sealed-seam construction, such as those listed for use with "Category III Appliances", and
for operating temperatures less than 400° F. The use of listed thimbles, roof jacks and/or
side vent terminals are required; and the proper clearances to combustible materials must
be maintained in accordance with type of vent pipe employed—in the absence of a clearance
recommendation by the vent pipe manufacturer, the requirements of the Uniform Mechanical
Code should be met. The ventilation air requirements for the MiniMax NT heater can be
found on page 16. 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 installations such as cold
climates. The MiniMax NT heater is suitable for through-the-
wall venting, see table and dimensions below.
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 vent pipes to a common exhaust
vent in multiple unit installations. Run separate vent pipes.
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P/N 472235
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Table 9.
F
E
Rev. D 12-22-04
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