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SiUS331708EA
Outline of Control (Indoor Unit)
Functions and Control
84
6.15 2-Step Thermostat Processing (CXTQ-TA Models)
Outline
The thermostat ON/OFF of the indoor unit is controlled in accordance with Thermostat step 1. The
gas furnace ON/OFF is controlled in accordance with Thermostat step 2.
When gas furnace operation requiring ON signal or water heater ON signal is sent from the outdoor
unit, gas furnace ON/OFF is controlled in accordance with Thermostat step 1.
Detail
Notes:
∗
1.
S
value varies automatically based on the room temperature trend.
∗
2. Ton +
S
> –
B
(°C), Toff +
S
<
A
(°C)
∗
3. For parameters, refer to page 97.
∗
4.
A
and
B
values vary automatically based on the field setting 12(22)-2.
∗
5. If, directly after a change in conditions, it is such that the thermostat could be either ON or OFF
(controlled temperature is within ranges
A
and
B
), the thermostat will be switched to ON.
&
•
No errors (except errors in which the system keeps operating)
has occurred.
•
Remote controller ON
•
Initial setting for communication completed
• Thermostat step 1: OFF
• Thermostat step 2: OFF
Other conditions
Perform the processing in
the following chart. (
∗
5)
(1) Cooling
(2) Heating
Thermostat step 2
Thermostat step 1
ON
OFF
ON
OFF
2+
S
(
∗
1)
4+
S
(
∗
1)
A
(
∗
4)
B
(
∗
4)
Controlled temperature
(Tcon)(˚C)
Set temperature (Ts’)
Thermostat step 2
Thermostat step 1
ON
OFF
ON
OFF
Toff+
S
(
∗
1,2,3)
Ton+
S
(
∗
1,2,3)
A
(
∗
4)
B
(
∗
4)
Set temperature (Ts’)
Controlled
temperature
(Tcon)(˚C)
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