Congratulations on your purchase of a MiniMax NT high performance heating system. Proper installation
and service of your new heating system and correct chemical maintenance of the water will ensure years
of enjoyment. The MiniMax NT is a compact, lightweight, efficient, induced-draft, gas fired high
performance pool and spa heater that can be directly connected to schedule 40 PVC pipe. The MiniMax NT
also comes equipped with the Pentair multifunction temperature controller which shows, at a glance,
the proper functioning of the heater. All MiniMax NT heaters are designed with a direct ignition device,
HSI (hot-surface ignition), which eliminates the need for a standing pilot. The MiniMax NT requires an
external power source (120/240 VAC 60 Hz) to operate.
This instruction manual provides operating instructions, installation and service information for the
MiniMax NT high performance heater. The information in this manual applies to all MiniMax NT models.
It is very important that the owner/installer read and understand the section covering installation
instructions, and recognize the local and state codes before installing the MiniMax NT. History and
experience has shown that most heater damage is caused by improper installation practices.
...For the installer and operator of the MiniMax NT pool and spa heater. The manufacturer's warranty may
be void if, for any reason, the heater is improperly installed and/or operated. Be sure to follow the
instructions set forth in this manual. If you need any more information, or if you have any questions
regarding to this pool heater, please contact Pentair Water Pool and Spa, Inc. at (800) 831-7133.
The MiniMax NT pool heater is sold with a limited factory warranty. Specific details are described on the
warranty registration card which is included with the product. Return the warranty registration card after
filling in the serial number from the rating plate inside the heater.
Pentair Pool Products' high standards of excellence include a policy of continuous product improvement
resulting in your state-of-the-art heater. We reserve the right to make improvements which change the
specifications of the heater without incurring an obligation to update the current heater equipment.
These heaters are designed for the heating of swimming pools and spas, and should never be used as
space heating boilers, general purpose water heaters, in non-stationary installations, or for the
heating of salt water. The manufacturer's warranty may be void if, for any reason, the heater is
improperly installed and/or operated. Be sure to follow the instructions set forth in this manual.
OPERATING THIS HEATER CONTINUOUSLY AT WATER TEMPERATURE BELOW 68° F. WILL CAUSE
HARMFUL CONDENSATION AND WILL DAMAGE THE HEATER AND VOID THE WARRANTY. Do not use
the heater to protect pools or spas from freezing if the final maintenance temperature desired is below
68° F., as this will cause condensation related problems.
Rev. D 12-22-04
Pool and Spa Heaters