Pentair MiniMax NT Heater User Manual
MiniMax® NT Heater
Digital Display Temperature Controller (DDTC)
Installation Instructions
IMPORTANT SAFETY INSTRUCTIONS
READ AND FOLLOW ALL INSTRUCTIONS
SAVE THESE INSTRUCTIONS
Table of Contents
SECTION I. INSTALLATION .............................................................................................................................. 2
SECTION II. WIRING ............................................................................................................................................ 2
SECTION III. INTRODUCTION OF DDTC ...........................................................................................................7
SECTION IV. SET UP ............................................................................................................................................. 8
SECTION V. LED INDICATORS .......................................................................................................................... 8
SECTION VI. TEMPERATURE SETTING ............................................................................................................ 9
SECTION VII. HEATING MODE SELECTION ...................................................................................................... 9
SECTION VIII. REMOTE CONTROL ....................................................................................................................... 9
SECTION IX. TROUBLE SHOOTING ..................................................................................................................10
SECTION X. MINIMAX NT HEATER DDTC RETROFIT KIT PARTS .......................................................... 12
This instruction is to be used with the DDTC Retrofit Kit (P/N 472377) to replace the 6800 Temperature
Controller for all Pentair Pool Products NT Heaters.
DANGER
FOR YOUR SAFETY – READ BEFORE OPERATING
This product must be installed and serviced by a professional service technician qualified in pool/spa heater
installation and maintenance. If you do not follow these instructions exactly, a fire or explosion may result,
causing property damage, personal injury or loss of life.
WARNING
Before installing this product, read and follow all warning notices and instructions which are included. Failure
to follow safety warnings and instructions can result in severe injury, death, or property damage.
Call (800) 831-7133 for additional free copies of this manual.
Important Notice
Attention Installer.
This manual contains important information about the installation, operation and safe use of this
product. This information should be given to the owner/operator of this equipment.
Pentair Pool Products
1620 Hawkins Ave., Sanford, NC 27330 • (919) 774-4151
10951 West Los Angeles Ave., Moorpark, CA 93021 • (805) 523-2400
Rev. B 1-20-04 1 P/N 472299
SECTION I. INSTALLATION
PANEL
DDTC COVER
BARRIER
(RAIN SHIELD)
DDTC PLATE
GASKET, DDTC PLATE
GASKET, DDTC COVER
1. Turn off the electrical power to the heater.
Figure 1.
2. Open the heater’s right door.
3. Disconnect all wires from the
6800 Temperature Controller.
4. Remove the left and right doors from the
heater if necessary.
5. Remove four screws on the cover of the
6800 Temperature Controller.
6. Remove the existing rain shield if any.
7. Install the mounting plate gasket before
putting DDTC board into the place,
see Figure 1 and Figure 2.
NOTE: Install mounting plate gasket before
installing face plate for DDTC board.
8. Install the cover gasket, DDTC cover, and
rain shield by using six screws, (six screws
are provided in the kit). See Figure 3.
9. NOTE: Apply some silicone between gasket and mounting frame to keep waterproof.
Do NOT over tighten screws on DDTC cover or gasket will be displaced.
10. Reconnect the wires per Section II. Wiring, below.
SECTION II. WIRING
1. Please see wiring diagram's, Figure 4 for MiniMax NT LN DV Heater, Figure 5 for
MiniMax NT DV Heater, and Figure 6 for MiniMax NT TSI LN Heater and follow the
instructions below exactly.
2. Reconnect the wire P4 to J4, P7 to J7, P9 to J9, P10 to J10, and P11 to J11 respectively
on the DDTC board.
3. Connect orange wire assembly from “FAN” of DDTC board to air pressure switch.
4. Disconnect the orange wire assembly from transformer to “24VAC” of Ignition Module.
5. Connect orange wire assembly (same wire as above #4) from “24VAC” of DDTC board to
“24VAC” of Ignition Module.
6. NOTE: Orange wire from transformer to module will no longer be used.
P/N 472299 2 Rev. B 1-20-04
Figure 2.
Apply silicone between the gasket
and rear-mounting frame.
Apply silicone between the gasket
and front-mounting frame.
Secure DDTC cover and rain
shield by using six screws.
Figure 3.
Rev. B 1-20-04 3 P/N 472299
FROM
TERM
BLOCK
120 VAC OR240 VAC
GRN
WHT
2
1
WHT
BLK
3
BLK
GREEN SCREW
ATTACH
GROUND
WIRE
HERE
GRN
(ON THE SIDE JACKET)
BLK
WHT
TRANSFORMER
BLOCK
TERM
ORG
PUR
RED
RED/WHT
BLK
BLK
WHT
WHT
1
2
WHT
BLK
WHT
CON-FEM(BLU)
FOR 120 VAC
BLU
YEL
BLK
CON-MAL(WHT)
BLK/WHT
WHT
BLK
3
WHT
BLK
4
5
BLK
WHT
GRN
GAS VALVE
MV
MV
RED
WHT
BLU
WHT
WHT
FOR 240 VAC
CON-FEM(BRN)
YEL
GRN
YEL
BLK
ORG
HOT SURFACE
PUR
IGNITOR
WHT
WHT
BLOWER
BURNER
WHT
P1
F1
WHT
IGN/120
BLU
IF ORIGINAL FACTORY WIRING MUST BE REPLACED,
INSTALLER MUST SUPPLY UL/CSA APPROVED WIRE
WITH 18 AWG, 600V, 105˚ C TEMP. RATING.
THERMAL FUSE WIRING MUST BE REPLACED WITH
INTERCONNECTING WIRING TO APPLIANCE MUST
CONFORM TO THE NATIONAL ELECTRICAL CODE OR
SUPERSEDE LOCAL(WIRING) CODES.
18 AWG, 600V, 150˚ C TEMP. RATING.
ORG
ORG
P2
IND
F2
24 VAC
IGN MODULE
GND
VAL
TH
IGN
L2
L1
IGN/240
YEL
BLK
WHT
WHT
FS
WHT
WHT
BLU
RED
RED
WHT
BLU
ORG
ORG
ORG
IGN MODULE
J10 J11
VLV
SW/HL/TFUSE
J4 J7
P4 P7 P10 P11
24V
24 VAC FAN
COM NO
ORG
TPROBE
ORG
AIR PRESS. SW.
DDTC
J9
J5
POOL
J8
COM
J6
SPA
WHT
P9
GRN
THERMAL FUSE
WHT
WHT
WHT
RED
RED
ORG
150˚F
HIGH LIMIT
BLK/WHT
115˚F
HIGH LIMIT
MiniMax NT LN Dual Voltage W/DDTC Wiring Diagram
WHT
ORG
SWITCH
WATER PRESSURE
BLK
RED/WHT
RED
ORG
GRN
TEMP.
WHT
WHT
FOR
SYSTEMS
REMOTE CONTROL
SEE INSTRUCTIONS
LOW GAS
PRESSURE SW.
Figure 4.
P/N 472299 4 Rev. B 1-20-04
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