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Rev. C 11-1-01 P/N 471593
23
MINIMAX NT LOW NOx PENTAIR TEMPERATURE CONTROLLER 7800
(See Figure 21, for keypad and Pentair Temperature Controller layout details.)
GENERAL
The MiniMax NT Low NOx Pentair Temperature Controller 7800 is the heart of the
control system. It controls all functions of the heater after first verifying that all safety
controls are functioning normally. If a malfunction is detected, the Pentair Temperature
Controller 7800 will flag the error with both the RED “Service” LED lighting and a
corresponding LCD icon appearing on the Pentair Temperature Controller 7800, pin
pointing the affected safety control(s). NOTE: The exception is the AUX (REMOTE)
LCD icon which appears when a REMOTE Control (or Remote Switch) is connected to
the Pentair Temperature Controller 7800, which overrides the “POOL” and “SPA” keypads
on the control, giving “ON” selection control to the REMOTE.
BASIC THERMOSTAT OPERATION
The Pentair Temperature Controller 7800 comes pre-programmed for use with the spa
temperature set at 104° F. and the pool temperature set for 78° F.— and with default
display mode set to display degrees F. (this may be adjusted to display in degrees C. with jumper on back of board), see
Figure 21.
You need not do anything further to enjoy your heater other than set it in the pool or spa mode by depressing the key
located under the corresponding “POOL” or “SPA” LED light. The LED above the selection will light and the
corresponding “POOL” or “SPA” LCD icon on the display will appear.
NORMAL OPERATION (NO REMOTE)
Each temperature setting in either POOL or SPA mode is settable independently.
If the Factory’s presetting of 78° F. for “Pool” and 104° F. for “Spa” is not desirable, you may adjust these settings. See
page 24 for changing the Factory Temperature Settings. To set the temperature while in SPA mode press the TEMP UP
key (with UP arrow) to increase or TEMP DOWN (with DOWN arrow) to decrease the set temperature to that desired.
NOTE: The left hand display indicates the current real-time temperature. To set the temperature for POOL mode, first
switch to POOL mode by depressing the “POOL” key and repeat the temperature setting procedure in this example. The
Pentair Temperature Controller 7800 remembers the last set temperature for both the POOL and SPA mode and you may
cycle between the two settings with the POOL and SPA selector keys.
In NORMAL operation, pressing the MODE key allows you the cycle between the right-hand display showing the SET
TEMP for the currently active POOL or SPA or the TIME.
Thermostat (Programming & Layout)
DAY ICON
TFUSEAUXFANPRESSH-LMTIGN
DISPLAY IN TIME MODE ONLY
POWER
SERVICE
SYSTEM
HEAT
OFF SPAPOOL
TEMP
TEMP
CURRENT TEMP
SET TEMP/TIME
NORMAL
FLASH IN PROGRAM MODE
KEYPAD SWITCHES
ALTERNATE DISPLAY
SET
MODE
ALTERNATE DISPLAY C or F.
FAULT CONDITION LCD ICONS
POOL OR SPA
(DISPLAY ALTERNATELY
ON LCD TO SHOW ACTIVE SELECTION)
PROGRAM
STEP
F = FAHRENHEIT
C = CELSIUS
P = P.M.
BLANK = A.M.
F = FAHRENHEIT
C = CELSIUS
(Pentair Temperature Controller 7800 Layout)
This icon is not a fault icon
but instead indicates a remote
switching device is connected
to the Pentair Temperature
Controller 7800, and has
overriding selection control
of Pentair Temperature
Controller 7800.
Figure 21.