Explanation Of Thermostat Jumpers; Sample Wiring Diagrams - Daikin TSTATD4271C Installation And Maintenance Manual

Explanation of Thermostat Jumpers

Jumpers are located on the back of the thermostat.
Figure 7: Thermostat Jumpers
This jumper configures
the thermostat to control a
conventional gas/electric system
or a heat pump. If your system is
anything other than a heat pump,
leave this jumper set for GAS/
ELEC.*
* For some commercial heat
pumps, this jumper will need to
be set for GAS/ELEC. Consult the
commercial heat pump literature.
When J1 is configured to control
a heat pump:
This jumper (J2) must be set to
control the appropriate reversing
valve. If RV=O is chosen, the
W1/O/B terminal will energize in
cooling. If RV=B is chosen, the
W1/O/B terminal will energize in
heating.
When J1 is set for GAS/ELEC:
This jumper (J3) controls how
the thermostat will control the
Fan (G) terminal in heating
mode. When GAS is chosen,
the thermostat will not energize
the Fan (G) terminal in heating.
When ELEC is chosen the
thermostat will energize the fan
in heating.
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7-D P
ay rogrammable

Sample Wiring Diagrams

Table 2: Conventional Heating and Cooling Systems
3 Wire, Heat Only
Residential & Commercial 1 Stage Heating with no Fan.
R
C
W1/O/B
J1 =
J2 =
J3 =
4 Wire, Cool Only
Residential & Commercial 1 Stage Cooling.
R
C
Y1
J1 =
J2 =
J3 =
5 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial 1 Stage Cooling, with 1 stage Gas Heat.
R
C
W1/O/B
Y1
G
J1 =
J2 =
J3 =
5 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial 1 Stage Cooling, with 1 stage Electric Heat.
R
C
W1/O/B
Y1
G
J1 =
J2 =
J3 =
8 Wire, 2 Stage Cooling, 3 Stage Heat
Residential & Commercial 2 Stage Cooling, with 3 stage Gas Heat
R
C
W1/O/B
W2
W3
Y1
Y2
G
J1 =
J2 =
J3 =
7
C D T
ommerCial igiTal
24VAC Power
24VAC Common
1st Stage Heat
Gas/Elec
O (not used)
Gas
24VAC Power
24VAC Common
1st Stage CoolG Fan
Gas/Elec
O (not used)
Gas
24VAC Power
24VAC Common
1st Stage Heat
1st Stage Cool
Fan
Gas/Elec
O (not used)
Gas
24VAC Power
24VAC Common
1st Stage Heat
1st Stage Cool
Fan
Gas/Elec
O (not used)
Electric
24VAC Power
24VAC Common
1st Stage Heat
2nd Stage Heat
3rd Stage Heat
1st Stage Cool
2nd Stage Cool
Fan
Gas/Elec
O (not used)
Gas
IM 1227 • MODELS DC THERMOSTATS
hermosTaTs