50
J-300
16.2 North American J-315 and J-325 Convertible Power Models
(60 Hz)
This wiring diagram is used for all North American 120/240V 60 Hz
convertible power models.
Note: Optional 120/240 VAC 4-wire connection enhances heater output
from 1kW to 4kW.
Light DCU
1
2
3
4
5
6
7
8
9
10
POWER
EXP BAR EXP BAR
WHT
WHT
WHT
WHT
WHT
WHT
BLK
BLK
BLK
BLK
BLK
BLK
BLK
BLK
RED
RED
RED
*
RED
*
RED
*
RED
J2
J3
HILO
J20
J21
J12
J14
J16
J11
J15
J13
J17 J7 J8
J9
J10
J5
J6
F1
K5 K7 K8
JP1
Control
Panel
7
5
3
1
8
6
4
2
To circuit board
GRN
TB1
WHT
BLK
3
2
1
3
2
1
GROUND
GRN
TB1
WHT
BLK
RED
GROUND
C
OR
THERM
SWITCH
THERM
SWITCH
CLEARRAY
Heater
1.0 kW @ 120 VAC (3-wire connection)
4.0 kW @ 240 VAC (4-wire connection)
Pressure Switch
Hi-limit/Freeze Sensor
Temperature Sensor
F1
20A
250V
SC-20
Main Pump
Circ.
Pump
Transformer
120 VAC
Optional 4-Wire 240/120 VAC Convertible Heater Connection
1. Remove and discard the factory installed GFCI Cord.
2. Move RED* wire from TB1 position #1 to TB1 position #3 as shown below.
3. Permanently connect to the power supply. Use copper conductors ONLY. Wire size must be
appropriate per NEC and/or local codes.
4. If hot tub is to be operated on 30A service, make sure the jumper provided at location JP1 #1 & 2
on the circuit board is installed. If hot tub is to be operated on 40A service, remove the jumper
JP1 #1 & 2 on the circuit board.
J1 Logic Jumper Settings
JP1 1-2 ON = 30A Logic (4-wire 120/240 VAC
operation only)
JP1 1-2 OFF = 40A Logic (4-wire 120/240 VAC
operation only)
JP1 7-8 ON = °C Temperature Display
JP1 7-8 OFF = °F Temperature Display
This device complies with Part 15 of the
FCC rules. Operation is subject to the
following two conditions:
1. This device may not cause harmful
interference.
2. This device must accept any inteference
received including interference that may
cause undesired operation.
Control
Panel
WARNING, ELECTRICAL SHOCK HAZARD EXISTS! Always remove power to spa before wiring and/or configuring the circuit board
Hard
Wire
Only
Plug-in
GFCI
Cord (US
Models
Only) OR
Hard
Wire
EXTERNAL SERVICE PANEL
BOX DISCONNECT MEANS
MUST BE LOCATED NO CLOSER
THAN 5 FT. (1.52m) FROM THE
INSIDE WALLS OF THE SPA AND
WITHIN SIGHT OF SPA
MAIN POWER
ON//OFF SHUTOFF
SWITCH
Ports 1-10
power spa
lights, waterfall
lights and step
lights on
applicable
models
Mini-Din Cable provides
constant 12 VAC from
yellow transformer wires
Mini-Din Control
Panel Cable
(Located inside the heater for certain models)
(not offered
on all models)
Standard 120 VAC 3-Wire Connection (60 Hz, 1 Phase, 15A Service),
USE COPPER CONDUCTORS ONLY. WIRE SIZE MUST MEET NEC RECOMENDATIONS
AND/OR LOCAL CODES AND IS DETERMINED BY MAXIMUM CURRENT DRAW AND
LENGTH OF RUN.
Heater IN Heater OUT
LED Lighting
System DCU
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