Trane CyberRow DX Installation, Operation And Maintenance Manual page 54

E² Controller
Factory>Group> Capacity Assist (Screen 3)
Each A/C unit in the group may be assigned local cut-in and
cut-out setpoints for its capacity assist operation. The values
entered are offsets which are applied to the control setpoints
established at the lead controller. Each unit in the group should
be assigned incrementally increasing/decreasing offsets for
cooling humidifying and dehumidifying so they will turn on one
at a time only if the unit(s) currently operating are unable to
satisfy the demand.
.
Display Description
Enter the delay
period for capacity
Assist Time
assist unit(s) to
begin operating.
Enter a
temperature
setpoint offset for
Cooling Cut in
cooling capacity
assist operation to
begin.
Enter a
temperature
setpoint offset for
Cut out
cooling capacity
assist operation to
stop.
Capacity Assist
Humid Cut in
Cut out
Dehum Cut in
Cut out
Factory>Group>Capacity Assist (Screen 4)
Display Description
Enter relative
humidity setpoint
offset for
Humid Cut in
humidifying
capacity assist
operation to begin
Enter relative
humidity setpoint
offset for
Cut out
humidifying
capacity assist
operation to stop
Enter relative
humidity setpoint
offset for
Dehum Cut in
dehumidifying
capacity assist
operation to begin
Enter relative
humidity setpoint
offset for
Cut out
dehumidifying
capacity assist
operation to stop
54
Variables Default
0 to 999 300
-99.9 to 99.9 300
-99.9 to 99.9 0.0
-4.0%
0.0%
4.0%
0.0%
Variables Default
-99.9 to 99.9 -4.0
-99.9 to 99.9 0.0
-99.9 to 99.9 -4.0
-99.9 to 99.9 0.0
Group Averaging
Use unit sensors when
in Standby or Assist
for Group Averaging
Temp/Hum Sensors
Static Pr Sensors
Factory>Group>Group Averaging (Screen 5)
Display Description
Temp/Hum Enter Yes for the unit to
Sensors respond to the local
sensors to enable Standby
or Capacity Assist
operation. Enter No for unit
Static Pr Sensors
to respond to the Group
sensors.
Group Alarm Setup
1-8: 000
17-24: 000
33-40: 000
Factory>Group>Group Alarm Setup (Screen 6)
This screen may be accessed on the controller for each unit to
be grouped. You may enter bitmask numbers to establish
which alarm conditions for that particular unit will initiate a
group internal alarm. The group alarms may be set before the
A/C units are wired together. When a group alarm condition is
detected by a unit it causes that unit to temporarily switch over
from Active to Off and if another unit is available in the group,
it may rotate into its place. A status massage Off by internal
alarm will appear in the Main screen of the unit that detected
the group alarm and switched off.
See "Custom Alarm Setup (Optional)," p. 46
how to select alarms using bitmask values. The Group Alarms
bitmask values are shown in the following tables. The settings
may be viewed at the Info level following the network sensors
screen. If an alarm condition appearing in the following tables
is detected, it needs to be reset at the units display terminal or
via the BMS for the unit to return to Active and resume
operation.
Table 21. Group Alarms 1 to 8
No. Description
1 Humidifier
2 Pump
3 Customer alarm 1
Circuit 1 high
4
pressure
Circuit 1 low
5
pressure
6 DX lockout
7 Humidifier lockout
Yes
Yes
Variables Default
0 = No
Yes
1 = Yes
0 = No
Yes
1 = Yes
9-16: 000
25-32: 000
for an overview of
Bit mask Default
1 0
2 0
4 0
8 0
16 0
32 0
64 0
AH-SVX015A-EN