28
RT-SVX50M-EN
opens the 24 Vac ground and opens all of the cooling
contactors.
Heating Operation
Standard unit operation for heating will continue on units
equipped with a two-speed indoor fan. During heat mode,
all units configured with staged electric or gas heat will heat
the supply air and space as normal utilizing full speed
indoor fan.
Emergency Stop
This input de-energizes the 24 Vac output from the phase
monitor and can be activated by opening a field supplied
device connected to the LTB.
JADE Controls - Low Leak
Economizer Sequence of
Operation
Table 5. Dry bulb operation no DCV (CO
2
sensor) - 2 speed fan
DCV
OA Good to
economize?
Y1-I Y2-I FAN SPD Y1-O Y2-O
Occupied Unoccupied
None No
Off Off Low 0-v/Off 0-v/Off MIN POS L Closed
On Off Low 24-v/On 0-v/Off MIN POS L Closed
On On
High
24-v/On 24-v/On MIN POS H Closed
None Yes
Off Off Low 0-v/Off 0-v/Off MIN POS L Closed
On Off Low 0-v/Off 0-v/Off
MIN POS L to Full-Open Closed to Full-Open
On On
High
DELAY 24-v/On
(a)
0-v/Off
(b)
MIN POS H to Full-Open Closed to Full-Open
(a)
With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second stage cooling by
turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.
(b)
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on 2nd stage of mechanical cooling Y2-O after the delay if the call for Y1-I and Y2-I have not been
satisfied.
Table 6. Dry bulb operation with DCV (CO
2
sensor) - 2 speed fan
DCV
OA Good to
economize?
Y1-I Y2-I FAN SPD Y1-O Y2-O
Occupied Unoccupied
Below set
No
Off Off Low 0-v/Off 0-v/Off VENTMIN L Closed
On Off Low 24-v/On 0-v/Off VENTMIN L Closed
On On
High
24-v/On 24-v/On VENTMIN H Closed
Yes
Off Off Low 0-v/Off 0-v/Off VENTMIN L Closed
On Off Low 0-v/Off 0-v/Off
VENTMIN L to Full-Open Closed to Full-Open
On On
High
24-v/On
0-v/Off
(a)
VENTMIN H to Full-Open Closed to Full-Open
Above set
No
Off Off Low 0-v/Off 0-v/Off VENTMIN L to VENTMAX Closed
On Off Low 24-v/On 0-v/Off VENTMIN L to VENTMAX Closed
On On
High
24-v/On 24-v/On VENTMIN H to VENTMAX Closed
Yes
Off Off Low 0-v/Off 0-v/Off VENTMIN L to VENTMAX Closed
On Off Low 0-v/Off 0-v/Off
VENTMIN L to Full-Open Closed to Full-Open
On On
High
DELAY 24-v/On
(b)
0-v/Off
(a)
VENTMIN H to Full-Open Closed to Full-Open
(a)
With stage 3 delay (STG3 DLY) in Advanced setup menu can turn on 2nd stage of mechanical cooling Y2-O after the delay if the call for Y1-I and Y2-I have not been
satisfied.
(b)
With 2SP FAN DELAY (Advanced Setup Menu) when in the economizing mode there is a delay for the high speed fan to try to satisfy the call for second stage cooling by
turning on the fan to high and opening the OA damper 100% before the first stage mechanical cooling is enabled.
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