Electric Heater User Manual
Connect the L1 of the power supply to the black wire, the
L2 or neutral lead to the red wire, and the ground wire to
the green wire (See Figure 23).
A time clock controlling the filter pump should have a low-
voltage Fireman’s Switch that switches off the heater at
least 15 minutes before shutting off the pump.
FIREMAN’S SWITCH CONNECTION
NOTICE: If, while there is line voltage connected to the
heater, you touch either line voltage terminal with any
24VAC wire that is connected to the control board (includ-
ing the Fireman’s Switch jumper), you will immediately
destroy the control board and void the warranty.
NOTICE: When using a timer and Fireman’s Switch, the
heater’s power supply should come from the load side of
the timer. The Fireman’s Switch completes the circuit for
the low voltage safety switches. It DOES NOT get any line
voltage power from the power supply.
Connect the Fireman’s switch to the heater as follows:
1. Turn off power to heater at main circuit breaker panel.
2. Unbolt and remove the upper jacket halves (see Figure
3, Page 5).
3. Open control box cover (see Figure 24).
4. Remove the factory-installed jumper between the
Fireman’s Switch terminals (see Figure 25).
5. Connect the wires between the Fireman’s Switch termi-
nals on the heater and those on the time clock using
18 gauge wire with a minimum 3/64” (1.2mm) thick
insulation rated for a temperature rise of at least
105°C. Route the wires out through the knockout on
the bottom of the Control Box. Use a 90° conduit el
and conduit run out through the cutout on the Lower
Enclosure, next to the Junction Box (see Figure 23).
21
Wire into bottom
of Junction-box
in Flexible Conduit
Wiring Harness
to Control Box
120/240V: Black
to Black (L1)
120V: White to Red (L2) or
240V: Red to Red (L2)
Green (Ground)
to
Green (Ground)
Bonding Wire
Bonding
Wire
Bonding Lug
View From Below
(Exterior)
View From Above
(Interior)
Cutout for
Conduit from
Fireman's Switch
P
R
E
S
S
T
A
B
V
E
N
T
P
IL
O
T
O
F
F
OFF
O
N
ON
GND
L1
GROUND (GND)
L2
JUNCTION
BOX
L1
L2
BM
FL
F1
L1
TRANS
F
I
R
E
M
A
N
S
S
W
I
T
C
H
Fireman’s Switch
Completes the heater
24 Volt AC Control
Board Circuit.
DO NOT connect this
circuit to Line Voltage!
YY
R
W
G
Y
Y
TERMINAL BOARD
TRANS
TRANS
FUSE
FUSE
L2
Time Clock or Remote
(Purchase Separately —
Supplies Power to
Circulator Pump)
24VAC
24VAC
BK
O
O
BK
W
R
BK
R
W
12 Pin
Receptacle
VAL
TH
IND
GND
24VAC
24VAC
FS
THERMISTOR
OPERATING CONTROL
DISABLE TOGGLE
ENABLE TOGGLE
CONTROL CENTER
SPA CONTROL
VERSION 1 PAD
MEMBRANE PAD
CONNECTION
9
1
J6
FIGURE 24: Open Control Box Cover
FIGURE 25: Fireman’s Switch Connections
FIGURE 23: Field Wiring