9
A70 UG 007 E - 0299
Output terminal functions
W1 Make-up or forced auxiliary
heating
Y1 Compressor 1 in cooling or
heating
Y2 Compressor 2 in cooling or
heating
G Fan starting
O Reversing valve supplied
with cooling
B Reversing valve supplied
with heating
R Independent power supply
24 V System 24 V power supply
24 V (C) 24 V common
LED 1 Free LED for status
LED 2 or to indicate function
CLK1 Used with remote clock
CLK2 for alternating set points
RS2 Used to connect the out-
door temp.sensor option
RS1 and/or remote ambient
temp. sensor option
RS+V Refer to instructions sup-
plied with the sensors.
Note 1: The R terminal can be used for
a second independent power supply.
If there is just one power supply,
bridging is provided between 24V
and R.
Note 2: This thermostat can operate
using 24VD C. The negative pole must
be connected to the 24V terminal (C).
Specifications
Nominal voltage 20-30 VAC, or
24 VDC nomi-
nal
Current amps (AC) 0.05 to 0.5 A
direct per out-
put with max.
peaks at 1A
Current amps (DC) 0 to 0.5 A
direct per out-
put with max.
peaks at 1A
Control range Heating: 5 to
30°C in 1°C
stages
Cooling:16 to
40°C in 1°C
steps
Ambient temperature
measurement range 0 to 48°C
Outdoor temperature
measurement range -48°C to 48°C
Precision ±0.5°C at 20°C
Minimum dead band 1°C between
heating and
cooling
modes.
Note : This thermostat contains elec-
tronic circuits which replace tradi-
tional mechanical contacts.
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