VAV Thermostat Controller
Specification and Installation Instructions
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Page | 9
Off
External Changeover
Sensor 10kΩ
Changeover Contact
Normally Cool
Changeover Contact
Normally Heat
External Temperature
Sensor 10kΩ
Differential Pressure Sensor
(0-10Vdc, PrSd=1-V if P=1)
Velocity Pressure Sensor
(0-10Vdc, PrSa 10V=Vnom)
Night Setback
Contact
33.
“Select AI2 Input Signal”
Default:
Range:
OFF
OFF, SENs, NoCl, NoHt, EtS, nSb, PrSd, PrSa
Select the input signal type for AI2 (analog input 2). Same options as in Step 32.
The AI1 input signal has priority over AI2. If you select the same input signal type as AI1, AI2 will not be functional.
34.
“Select AI3 Input Signal”
Default:
Range:
OFF
OFF, SENs, NoCl, NoHt, EtS, nSb, PrSd, PrSa
Select the input signal type for AI3 (analog input 3). Same options as in Step 32.
The AI1 and AI2 input signals have priority over AI3. If you select the same input signal type as AI1 or AI2, AI3 will not
be functional.
35.
“Extern Temper Sensor Offset”
Range:
Offset:
Increment:
0 to 50ºC
[41 to 122ºF]
Max. ± 5ºC
0.1ºC
[0.2ºF]
This option appears if you
’ve set one of the analog inputs to
EtS
(External temperature sensor) in Step 32, 33 or 34. When the
thermostat is connected to the appropriate analog input (AI1, AI2, or AI3), the display shows the temperature read by the
external temperature sensor. Adjust the offset by comparing it with a known value (e.g. thermometer). If the sensor is not
connected or short circuited, the display is blank “Error“.
36.
“CH Over SetPnt Temper”
Default:
Range:
Increment:
24ºC
[82ºF]
10 to 40ºC
[50 to 104ºF]
0.5ºC
[1ºF]
This option appears if you
’ve set one of the analog inputs to
SENs
(External changeover sensor) in Step 32, 33 or 34. Set the
desired changeover temperature setpoint. Please note that the heating mode activates when the temperature read by the
external sensor is above the Changeover Setpoint and cooling mode activates when the temperature read by the external
sensor is below the Changeover Setpoint.
37.
“NSB Delay Overide Minutes”
Default:
Range:
Increment:
120 minutes
0 to 180 minutes
15 minutes
This option appears if you
’ve set one of the analog inputs to
nSb
(Night Setback contact) in Step 32, 33 or 34. When in Night
Setback mode, the end user can override the Night Setback setpoints for the duration of this delay (refer to Operation Mode on
page 13). To disable Night Setback override, set the delay to 0. The moon symbol is displayed
to indicate “Night Setback”
mode.
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