Appendix A: RTU Open Points/Properties
66 RTU Open
Unoccupied High SPT Alarm Limit
– The value that the space temperature must
exceed to generate a
D:
in the unoccupied mode. There is a
fixed hysteresis of 1° F for return to normal.
R:
90°F
-60 to 250°F
Supply Air Temperature Alarm
– The value that the supply air temperature must drop below to
generate a
D:
. There is a fixed hysteresis of 1° F for return to
normal.
R:
45°F
-60 to 250°F
– The value that the supply air temperature must exceed to
generate a
D:
. There is a fixed hysteresis of 1° F for return to
normal.
R:
120°F
-60 to 250°F
Low Space Humidity Alarm Limit
– The value that the relative humidity must drop
below to generate a Low Space Humidity Alarm. Requires a space relative humidity
transmitter and
>
>
(or
)
set to
D:
.
R:
30%
0 – 99 %
High Space Humidity Alarm Limit
– The value that the relative humidity must rise
above to generate a High Space Humidity Alarm. Requires a space relative humidity
transmitter and
>
>
(or
)
set to
D:
.
R:
70%
0 – 99 %
Occupied High CO2 Alarm Limit
– The value that the CO
2
sensor must exceed to
generate an
in the occupied mode. There is a fixed hysteresis of 100ppm
for return to normal. Requires a space CO2 sensor and
>
>
(or
)
set to
D:
.
R:
1200ppm
0 to 9999 ppm
Service Configuration
i-Vu / Field Assistant:
BACview:
>
>
>
Options:
– The type of equipment that the RTU Open is controlling.
– Standard rooftop air handling unit.
– Heat Pump application, uses reversing valve output to control heating
and cooling.
D:
– Carrier Heat Pump application only.
R:
Heat/Cool
Heat/Cool
HP O/B Ctrl
HP Y1/W1 Ctrl
