Specifications

21
CONTROLS QUICK START
The following section will provide a quick user guide to set-
ting up and configuring the A series units with ComfortLink™
controls. See Basic Control Usage section on page 3 for infor-
mation on operating the control.
Two-Stage Constant Volume Units with
Mechanical Thermostat —
To configure the unit, per-
form the following:
1. The unit is shipped with the unit control disabled. Enable
the control by setting Local Machine Disable (Service
Test
→ STOP)toNo.
2. The type of control is configured under Configuration
→ UNIT → C.TYP.SetC.TYP to4(TSTAT2STG).
3. Remove jumpers from R-W2 and W2-W1 on TB4 in the
control box.
4. See Economizer Options section on page 22 for addition-
al economizer option configurations.
5. See Exhaust Options section on page 22 for additional
exhaust option configurations.
Two-Stage Constant Volume Units with Space
Sensor —
To configure the unit, perform the following:
1. The unit is shipped with the unit control disabled. Enable
the control by setting Local Machine Disable (Service
Test
→ STOP)toNo.
2. The type of control is configured under Configuration
→ UNIT → C.TYP. Set C.TYP to 6 (SPT 2 STG).
3. Under Configuration
→ SENS → SPT.S, enable the space
sensor by setting SPT.S to ENBL (enable).
4. Install jumpers between R-W2 and W2-W1 on TB4 in
the control box.
5. The space temperature set points are configured under the
Setpoints menu. The heating and cooling set points must
be configured. See the Heating Control and Cooling
Control sections on pages 41 and 30 for further descrip-
tion on these configurations. Configure the following set
points:
6. The degrees of demand from the space temperature set
points are configured under the Configuration
→ D.LV.T
submenu. See the Heating Control and Cooling Control
sections for further description on these configurations.
Configure the following set points:
7. Under Configuration
→ UNIT → CV.FN,setCV.FN to 1
for continuous fan or 0 for automatic fan.
8. To program time schedules, set SCH.N=1 under Config-
uration
→ CCN → SC.OV → SCH.N to configure the
control to use local schedules.
9. Under the Timeclock
→ SCH.L submenu, enter the
desired schedule. See Time Clock section for further
descriptions of these configurations.
10. Under the Configuration
→ CCN → SC.OV submenu, the
following schedules and overrides should be configured:
11. See Economizer Options section on page 22 for addition-
al economizer option configurations.
12. See Exhaust Options section on page 22 for additional
exhaust option configurations.
Variable Air Volume Units Using Return Air
Sensor or Space Temperature Sensor —
To con-
figure the unit, perform the following:
1. The unit is shipped with the unit control disabled. Enable
the control by setting Local Machine Disable (Service
Test
→ STOP)toNo.
2. The type of control is configured under Configuration
→ UNIT → C.TYP. Set C.TYP to 1 (VAV-RAT) for return
air sensor. Set C.TYP to 2 (VAV-SPT) for space tempera-
ture sensor.
NOTE: For VAV with a space sensor (VAV-SPT), under
Configuration
→ UNIT → SENS → SPT.S, enable the
space sensor by setting SPT.S to ENBL.
3. Install jumpers between R-W2 and W2-W1 on TB4 in
the control box.
4. The space temperature set points and the supply air set
points are configured under the Setpoints menu. The
heating and cooling set points must be configured. See
the Heating Control and Cooling Control sections for
further description on these configurations. Configure the
following set points:
5. To program time schedules, make sure SCH.N=1 under
Configuration
→ CCN → SC.OV → SCH.N to configure
the control to use local schedules.
6. Under the Timeclock
→ SCH.L submenu, enter the de-
sired schedule. See Time Clock section for further
descriptions of these configurations.
7. Under Configuration
→ SP → SP.SP, the Supply Duct
Static Pressure set point should be configured.
8. If Supply air temperature reset is desired, under the
Configuration
→ EDT.R submenu, the following set
points should be configured:
NOTE: Configure either RTIO and LIMT or RES.S. All three
are not used.
9. See the Economizer Options section on page 22 for addi-
tional economizer option configurations.
10. See the Exhaust Options section on page 22 for addition
exhaust option configurations.
OHSP Occupied Heat Setpoint
OCSP Occupied Cool Setpoint
UHSP Unoccupied Heat Setpoint
UCSP Unoccupied Cool Setpoint
GAP Heat-Cool Setpoint Gap
L.H.ON Demand Level Lo Heat On
H.H.ON DemandLevelHiHeatOn
L.H.OF Demand Level Lo Heat Off
L.C.ON Demand Level Lo Cool On
H.C.ON Demand Level Hi Cool On
L.C.OF Demand Level Lo Cool Off
O.T.L. Override time limit
SPT.O SPT override enabled?
T58.O T58 override enabled?
OHSP Occupied Heat Set point
OCSP Occupied Cool Set point
UHSP Unoccupied Heat Set point
V. C . O N VAV Occupied Cool On Delta
V. C . O F VAV Occupied Cool Off Delta
SASP Supply Air Set Point
SP.SP Static Pressure Set point
RS.CF EDT Reset Configuration
RTIO Reset Ratio (if RS.CF = 1 or 2)
LIMT Reset Limit (if RS.CF = 1 or 2)
RES.S EDT 4-20 mA Reset Input (if RS.CF =3)