This instruction manual provides operating instructions,
installation and service information for the MiniMax CH high
performance heater. The information in this manual applies to
the MiniMax CH 150, 200, 250, 300, 350, and 400 natural gas
and propane (LP) 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 CH. History
and experience has shown that most heater damage is caused by
improper installation practices.
The MiniMax CH 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.
1. Spa or hot tub water temperatures should never exceed
104° F (40° C). A temperature of 100° F (38° C) is
considered safe for a healthy adult. Special caution is
suggested for young children.
2. Drinking of alcoholic beverages before or during spa or hot
tub use can cause drowsiness which could lead to
unconsciousness and subsequently result in drowning.
3. Pregnant women beware! Soaking in water above 102° F
(39° C) can cause fetal damage during the first three months
of pregnancy (resulting in the birth of a brain-damaged or
deformed child). Pregnant women should stick to the
100° F (38° C) maximum rule.
Should overheating occur or the gas supply fail to shut off, turn off the manual gas control valve to the
appliance. Do not use this heater if any part has been under water. Immediately call a qualified service
technician to inspect the heater and to replace any part of control system and gas control which has been
To identify the heater, see rating plate on the inner front panel of the
heater. There are two designators for each heater, one is the Model
Number and the other is the Heater Identification Number (HIN).
a. Model Number:
character indicated: Input rating (Btu/hr) X 1000
b. Heater Identification Number (HIN):
The following example simplifies the identification system.
1) HTR : Heater
2) (150, 200, 250, 300, 400) : Input rating (Btu/hr) X 1000
3) CH : MiniMax CH
4) Blank : Standard Model
5) N M : Gas type (Natural gas) & Ignition Device
6) Options :
Blank: Standard Model
ASME: ASME Certified (Bronze Headers)
ASHI: ASME Certified Bronze Header & High Altitude Rating
HALT: High Altitude Rating
CAN: Canadian Compliance
CANH: Canadian Compliance and High Altitude
4. Before entering the spa or hot tub, the user should check the
water temperature with an accurate thermometer. Spa or
hot tub thermostats may err in regulating water temperatures
by as much as 4° F (2.2° C).
5. Persons with a medical history of heart disease, circulatory
problems, diabetes or blood pressure problems should obtain
their physician's advice before using spas or hot tubs.
6. Persons taking medication which induce drowsiness, such
as tranquilizers, antihistamines or anticoagulants should not
use spas or hot tubs.
Rev. C 1-22-04