3
SuperBus® 2000 Energy Saver Module
Wiring
Wiring
Some thermostats control heating and cooling, others con-
trol only heating. A heating/cooling thermostat uses four
wires and a heating-only thermostat usually has two.
Note
If the thermostat wire colors are different than those
described above, contact a qualified HVAC service
person for wiring information about the specific ther-
mostat you are working with. Be sure to give the ser-
vice person the manufacturer name and model
number of the thermostat.
To wire the ESM to a Concord panel:
1.
Remove AC panel power and disconnect the backup
battery.
2.
Turn off the thermostat and remove its cover.
3.
Route a 4-conductor, 22-gauge or larger, stranded wire
from the ESM to the panel.
4.
Connect terminals 3 through 6 to the panel as shown in
Figure 4.
Figure 4. ESM Wiring Connections to the Thermostat and
Concord Panel Terminals
5.
Route 22-gauge or larger, stranded wire from the ESM
to the thermostat.
To wire the ESM to the UltraGard panel:
1.
Turn the power switch to off, unplug the AC power
transformer, and disconnect the backup battery.
2.
Turn off the thermostat and remove its cover.
3.
Route a 4-conductor, 22-gauge or larger, stranded wire
from the ESM to the panel.
4.
Connect terminals 3 through 6 to the panel as shown in
Figure 5.
Figure 5. ESM Wiring Connections to the Thermostat and
UltraGard Panel Terminals
5.
Route 22-gauge or larger, stranded wire from the ESM
to the thermostat.
To connect a four-wire thermostat:
1.
Remove the red wire (or power feed) from the thermo-
stat and connect it to ESM terminal 1.
2.
Connect a wire from ESM terminal 2, to the thermostat
terminal where the red wire (or power feed) was con-
nected.
To connect a two-wire thermostat:
1.
Remove one of the wires from the thermostat and con-
nect it to ESM terminal 1.
2.
Connect a wire from ESM terminal 2, to the terminal
on the thermostat where the original wire had been con-
nected.
Table 2: Four-Wire Thermostat Color Code
Wire
Function
Red
Power feed to thermostat
Green
Fan control
Yellow
Cooling
White
Heating
1
2
5
ESM TERMINALS
CONCORD
PANEL TERMINALS
THERMOSTAT
TO FURNACE
+12
VDC
BUS
A
BUS
B
GND
8573G09A.DSF
3
4
6
3
4
5
6
12
13
14
15
6
1
2
3
4
5
ESM TERMINALS
ULTRAGARD
PANEL TERMINALS
THERMOSTAT
TO FURNACE
DC
OUT
BUS
A
BUS
B
GND
8557G30A.DS4
