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To connect the LX Low NOx to your RS control
system, follow the steps listed below (See Fig. 24).
1. Turn off the power to both the heater and the RS
control.
2 Open the RS Power Center enclosure and
remove the front dead panel.
NOTE: Only a revision "I", or higher, program
chip in the RS system will support the LX Low
NOx heater interface.
3. Remove the two screws holding the bezel in
place. Turn the bezel over to view the circuit
board on the back.
4. Locate the programmed chip on the Power
Center Board (the larger square chip in the lower
right corner of the circuit board). In the center of
the chip is the revision letter. If the revision letter
is "I" or higher go to step 5. If the revision level is
"H" or lower, replace the chip. Directions for
removal and installation of the chip are provided
in the new PPD Kit .
NOTE: If ordering a new programmed chip, be
sure to order the part number printed on the
chip currently in your RS control.
5. Use 22 gauge 4-conductor wire (Jandy part #
4278) to run between the heater and the RS
control, and match the wire color order.
6. The wires coming from the LX Low NOx heater
can be “doubled up” on the red terminal bar with
the four wires coming from the indoor controller.
NOTE: If you need to install more than two
wires in each terminal, order a Jandy Multiplex
PCB Kit, which includes the Multiplex Board
(Jandy part # 6584). Never put more than two
wires into each of the pins of the terminal bar.
7. On the heater's electronic control board, verify
that the water temperature sensor is connected
(J4-1 & J4-2), and that jumper is in place on W0.
8. Check all wiring, then apply power to both the
heater and the RS control system. Operation can
be verified in either Service or Auto mode. See
your RS Control System manual for instructions
about operation.
When the LX Low NOx heater is first powered,
the display on the control will show "RS ONLINE". If
there is an RS control connected to the heater, it will
sense the RS unit and remain online. If an RS system
is not connected to the LX Low NOx heater via the
four conductor line, the message "RS ONLINE" will
disappear after 15 seconds. When the display shows
"RS ONLINE" all functionality of the control on the
heater is disabled. The heater functions can be con-
trolled only at the RS unit. However, sensor data is
displayed at both the heater and the RS unit.
To temporarily use the heater controls, use the
selector button to turn the heater from either "Pool" or
"Spa" to "Off". The "RS ONLINE" indicator will
disappear from the heater display. All functionality has
now been returned to the control on the heater. In this
mode the RS unit is no longer controlling the heater.
To return the functionality to the RS unit, use a thin
object, such as a paper clip or tooth pick, to depress
the button marked "RS SERVICE".
An interrupt (on/off) type remote can be con-
nected by removing the jumper wire on the terminal
block located in the control compartment (see Figure
21) and connecting the two wires from the remote to
the two terminals on the terminal block. This type of
remote control will turn the heater on or off, but will
not perform any other function.
This type of connection may be used to connect
a Jandy AquaLink RS Control System utilizing any
revision level programmed control chip. The control
will automatically turn the heater on and off and will
display the pool water temperature, but all other
functionality and display information will be inactive.
When using this type of connection, remember to set
the LX heater's control to either "Pool" or "Spa" and
set the corresponding thermostat control to maximum.
Consult with our Service Department for ques-
tions about installing remote controls manufactured by
companies other than Jandy.
Figure 24. Wiring an LX Low-NOx to a Jandy RS
Remote
RS CONTROL
POWER
CENTER
22 GAUGE,
4 CONDUCTOR
LX CONTROL
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