4
2.1 - New Installation
Run cable to a hole at the selected wall location for the thermo-
stat and pull about 75 mm of wire through the opening. Color-
coded thermostat cable with at least one conductor for each
wiring terminal is recommended. Good service practice recom-
mends selecting a cable with one or two extra conductors than
the immediate application requires.
If using remote temperature sensor(s), refer to the mounting ins-
tructions included with the device for wiring cable requirements.
Route cable away from sources of electrical interference.
2.2 - Mount subbase or wallplate
The subbase or wallplate can be mounted on a horizontal outlet
box or directly on the wall.
For a wall installation, hold subbase or wallplate in position and
mark holes for the screws. See figure 1. Screws and wall plugs
must be obtained locally. Be careful that the wires do not fall
back into the wall opening. Set aside subbase or wallplate.
2.3 - Set subbase DIP switches
The Subbase provides the Thermostat with an interface to the
single zone HVAC system. See Table 1 for DIP switch settings.
The subbase DIP switches are located on the front and to the
right of the wiring terminals. See Fig.2. Set the DIP switches for
the system being controlled.
Table 1 - Subbase DIP switch settings
a. No effect on 2 heat/1 cool Thermostats/ 2ET04700324.
b. Factory setting.
c. No effect on heat pump subbases : 2ET04700324/424.
2.4 - Set thermostat mini-jumper
Note : This operation must be done prior to installing the
batteries. If batteries are installed prior to this operation,
remove battery for 15 minutes and begin.
The thermostat is factory-set for conventional system control. If
using with a heat pump 2ET04700324 or 424, locate the mini-
jumper on the back of the display. See Fig. 3. Pull the mini-jum-
per off the two CONV pins and move to the two HEAT PUMP
pins. This changes the thermostat to the heat pump algorithm.
If you wish to change the control of the thermostat because a
new subbase has been purchased, remove battery for 15
minutes, change mini-jumper position, and re-install battery.
2.5 - Set display DIP switches
The thermostat DIP switches provide the thermostat with an
interface to the single zone HVAC system. See Table 2 for DIP
switch settings. The display DIP switches are located on the
back of the thermostat. See Fig. 4. Set the DIP switches for the
desired thermostat features and the system being controlled.
CA1
CA2
CA3 CA4
CA5
LED1 LED2 COM
Y1
G
RC
RH
B
A3
A2
A1
W2
Y2
T
T
Switch
Setting
Function
1a
ONb
2 stages heat
OFF
1 stage heat
2a
ONb
2 stages cool
OFF
1 stage cool
ONb
Proportional plus integral (P+I)
3
control (droopless)
OFF
Proportional control (allows droop)
4c
ONb
Energizes fan on cool only
OFF
Energizes fan on heat and cool
5
ONb
Use internal sensor
OFF
Use remote sensor
2 - Installation
CA1
CA2
CA3
CA4 CA5
LED1 LED2 COM
Y1
G
RC
RH
B
A3
A2
A1
W2
Y2
T
T
0
N
1
2
3
4
5
4
1
T7300 ONLY
HEAT PUMP
CONV
0
N
1
2
3
4
5
°
C
24
CON
OFF
°
F - TEMP
12 HR. TIME
INT - FAN
ON - KEYBD
0
N
°
F - TEMP
12 HR. TIME
INT - F
A
N
ON - KEYBD
1
2
T7300 ONLY
HEAT PUMP
CONV
0
N
1
2
3
4
5
°
C
24
CON
OFF
°
F - TEMP
12 HR. TIME
INT - FAN
ON - KEYBD
0
N
1
2
3
4
5
°
C
24
CON
OFF
°
F -
TEMP
12 HR.
TIME
INT
- F
A
N
ON - KEYBD
Fig. 1
Fig. 2 - Subbase DIP switches
Fig. 3 - Setting thermostat mini-jumper
Fig. 4 - Display DIP switches
