MasterTemp Pool and Spa Heater P/N 474131 Rev. M 8/2020
36
LOW VOLTAGE
RACEWAY
HigHigh
High Voltage Cover Panel Tabs (3)
Front door
Hi
High Voltage Cover Panel slots (3)
Flip down the Outdoor Control Panel to ac
-
Circuit board and low
voltage compartment
Loosen Outdoor Control Panel
Retaining screws
To connect the MasterTemp heater to the load center:
BEFORE REMOVING THE HIGH VOLTAGE COVER PANEL FROM THE
LOAD CENTER OR POWER CENTER ENCLOSURE SWITCH OFF THE
POWER AT THE HOUSE MAIN CIRCUIT BREAKER BOX.
1. Switch OFF AC power to the enclosure at the main house panel circuit breaker.
2. Unlatch the front door latch and open the front door. Remove the two retaining screws from the High Voltage Cover
Panel and remove the panel.
See Figure 35.
3. Loosen the two retaining screws securing from the top edge of the Outdoor Control Panel. Fold down the Outdoor
Control Panel to access the circuit board sockets connectors for the electrical connections.
Connecting the RS-485 Cable from the Heater to the Load Center
Note: Use a 22 AWG four conductor low voltage RS-485 cable to connect to the MasterTemp heater to the
IntelliCenter Control System Load Center:
4. Run the RS-485 cable from the heater’s control board RS-485 COM port terminal connector to the Load Center or
Power Center. See wiring connection
Figure 36
on next page.
5. Insert the cable into the one of the plastic grommet fittings, located on the lower left side of the enclosure and pull the
cable up through the low voltage to the circuit board, as shown below.
6. Strip back the outer jacket four inches. Strip back each conductor ¼-inch.
7.
IntelliCenter Control System COM Port (J4 or J5):
Insert the conductors into the COM Port screw terminals located
on the top of the IntelliCenter Control System circuit board (see diagram below). Secure the conductors with the screws.
For wiring details, refer to the pin configuration shown below. Note: Multiple conductors may be inserted into a single
screw terminal.
Figure 35
Section 1. Installation
