Taco PC705-2, Instruction Sheet

Page: 7 / 12

7 of 12
Reference Applications PC 705-2
Drawing 3/705-2: Radiant Floor Heating, High Temperature heating with DHW generation Drawing 4/705-2: Radiant Floor Heating, High Temperature heating with 2 boilers and DHW generation
120 V
(ac)
T
Outdoor Sensor
T
T
Outdoor Sensor
Boiler
Sensor
Supply Sensor
Priority Zone
Switc
h
set to
ON
Priority Zone
Switc
h
set to
OFF
Boiler
Sensor
(optional)
120 V
(ac)
T
Outdoor Sensor
T
T
T
T
T
T
T
Outdoor Sensor
Boiler
Sensor
Supply Sensor
Priority Zone
Switc
h
set to
ON
Priority Zone
Switc
h
set to
OFF
Boiler
Sensor
(optional)
T
T
PO
WER
Zone 3
Zone 2
Zone 1
INPUT
END
SWITCH
ZR
X
X
ZC
Zone 3
Zone 2
Zone 1
T
aco Zone Control SR 503-EXP
Boiler Pump
Boiler
Pump
Injection
Pump
Injection
Pump
DHW T
ank
PO
WER
Zone 3
Zone 2
Zone 1
INPUT
END
SWITCH
ZR
X
X
ZC
Zone 3
Zone 2
Zone 1
T
aco Zone Control SR 503-EXP
A
Expansion Switc
h
set to
Master
Mode Switc
h
set to
Normal
Expansion Switc
h
set to
Sla
ve
Mode Switc
h
set to
Normal
PC
705-2
PC
702-1
PC
700-2
DHW T
ank
PO
WER
Zone 3
Zone 2
Zone 1
INPUT
END
SWITCH
ZR
X
X
ZC
Zone 3
Zone 2
Zone 1
T
aco Zone Control SR 503-EXP
PO
WER
Zone 4
Zone 3
Zone 2
Zone 1
INPUT
END
SWITCH
ZR
X
X
ZC
Zone 4
Zone 3
Zone 2
Zone 1
T
aco Zone Control SR 506-EXP
Zone 5
Zone 6
Zone 5
Zone 6
A
Expansion Switc
h
set to
Master
Mode Switc
h
set to
Reset
Expansion Switc
h
set to
Sla
ve
Mode Switc
h
set to
Normal
PC
705-2
*
*
* Same po
w
er
supply circuit m
ust
be used
* Same po
w
er
supply circuit m
ust
be used