18
ULTRATEMP ETI™ Hybrid Heater Installation and User’s Guide
Connecting the Heater to the EasyTouch
®
Control System Load Center via
the RS-485 Connector
Switch the main power off to the EasyTouch
load center before servicing.
The UltraTemp
ETi™ Hybrid Heater can be
controlled by an EasyTouch system via the RS-485
communication cable.
The transfer of this data takes several seconds and
causes a delay from when the command is given from
the EasyTouch indoor control panel until the heater
physically responds. This happens automatically but
may take 1-2 minutes to complete.
Note: Heater control board set points will be
shown as “N/A” and will be functionaly disabled.
For more information, refer to the EasyTouch
User’s Guide (P/N 520584) or the EasyTouch
Wireless System User’s Guide (P/N 520688).
Connection from heater board to the EasyTouch
system is via the optional four-wire cable (P/N
520199).
To connect the heater board cable to the
EasyTouch load center:
1. Turn off the main system power before making any
connections.
2. Unlatch the EasyTouch load center front door
spring latches, and open the front door.
3. Remove the cover-panel screws securing the
high voltage cover-panel, and remove it from the
enclosure.
4. Loosen the two control panel access screws and
fold down the outdoor control panel.
5. Insert the four-wire cable into plastic grommet on
the bottom of the enclosure and route the wire up
through the low voltage raceway to the Personality
board.
6. Strip back the cable conductors ¼-in (6.4 mm).
Insert the wires into the J20 COM PORT screw
terminals located on the left side of the Personality
board. Secure the wires with the screws. For wiring
details, refer to the pin configuration as shown on
page 19.
Note: Multiple wires may be inserted into
single screw terminal.
7. Close the control panel and secure it with the two
access screws.
8. Install the high voltage panel cover and secure it
with the two retaining screws.
9. Close the load center front door and secure with
the two latches.
10. Switch power on to the load center.
Personality Board
Low Voltage
Raceway
Plastic
Grommet
Access
Screw
Cover
Panel
Screw
(Cover Panel
not shown)
Automation Load Center
