LX and LT Low NOx Pool/Spa Heater
Page 21
The National Electrical Code and most other
codes require that all metallic components of a pool
structure, including reinforcing steel, metal fittings and
above ground equipment be bonded together with a
solid copper conductor not smaller than a number 8
wire. The heater, along with pumps and other such
equipment must be connected to this bonding grid. A
special labeled bonding lug is provided on the right side
of the heater to accommodate this requirement.
6.4 Auxiliary Time Clock Wiring
Electrical wiring must be in accordance with the
latest edition of the National Eclectic Code (NEC),
ANSI/National Fire Protection Association (NFPA)
70, unless local code requirements indicate otherwise.
If you install a time clock to control the filter
pump operation, it is recommended that the time clock
have its own low voltage (Fireman’s) switch to turn
off the heater before turning off the pump . The switch
should shut off the heater about 15 minutes before the
filter pump shuts off. This will allow for a more
efficient operation by removing any residual heat
contained in the heat exchanger back to the pool.
To install a time clock auxiliary switch into the
heater circuit, follow these instructions (see Figure 22):
1.
Remove heater door.
2.
Remove the two screws securing the raceway
cover. They are located on the bottom flange of
the cover at the corners.
3.
Slide the raceway cover down to expose the
raceway.
4.
Remove the factory installed jumper wire and tag
from the terminal strip (see Figure 22).
5.
Connect the low voltage wires from the time
clock auxiliary switch to the two terminals. Use
American Wire Gage (AWG) No. 14 gauge
stranded copper wire with a temperature rating
of 221°F (105°C) or greater (see Figure 23).
If your time clock simply interrupts the high
voltage power supply or has a high voltage output,
do
not
connect the power supply of the heater to the
output side of the clock
. Doing so will prevent the
blower from purging the residual heat from the heater
when the heater turns off. This situation will damage
the heater. The blower must be allowed to run for 45
seconds after the heater shuts off.
6.5 Remote Operation
The LX Low NOx pool/spa heater controls can
be wired for remote operation. All Jandy AquaLink
RS Control Systems will permit the heater to be
operated by remote control. If you are setting up a
new pool or spa system, call your local Jandy distribu-
tor or the Customer Service Department for informa-
tion on the correct RS Control System to meet your
needs.
To maintain full functionality of an existing RS
Control System when connecting to an LX Low NOx
heater, first determine the revision level the pro-
grammed chip in the RS Control System's Power
Center Board. To check the revision level of the chip,
press and hold the reset button on the side of the
indoor control panel for 10 seconds then release it. A
number will appear on the display for approximately 5
seconds. This first number can be ignored. After the
first number disappears, a second number will appear
in the display window. It will consist of 4 digits fol-
lowed by a revision level ("#### REV _"). If the
revision level displayed here is at "I" or higher it will
accommodate an LX Low NOx heater without any
modification. If the chip is at a revision "H" or lower
the chip will have to be replaced with a newer version,
or to install the control without modification see
information later in this section. An alternate method
for determining the revision level of the programmed
chip in your RS control, is described in steps 1-4
below. An updated chip can be obtained through Jandy
by ordering the PPD Kit. Instructions for changing the
chip are in the kit.
Do not connect more than two wires to any of
the terminals in the RS Control System when connect-
ing peripheral devices. If connecting the LX Low NOx
heater to the RS Control System creates this situation,
then a Multiplexing PCB kit must be used. Call your
distributor or Waterpik Technologies to order the kit.
Figure 23. Typical Time Clock Wiring
Figure 22. Remove Jumper from Terminal Block
LEFT SIDE OF
RACEWAY
REMOVE JUMPER
WIRE
TERMINAL BLOCK
