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27
CONTROLS QUICK START
The following section will provide a quick user guide to set-
ting up and configuring the A Series units with
Comfort
Link™
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
) to No.
2. The type of control is configured under
Configuration
→
UNIT
→
C.TYP
. Set
C.TYP
to 4 (TSTAT 2 STG).
3. Remove jumpers from R-W2 and W2-W1 on TB4 in the
control box.
4. See Economizer Options section on page 28 for addition-
al economizer option configurations.
5. See Exhaust Options section on page 28 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
) to No.
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 47 and 36 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
, set
CV.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 28 for addition-
al economizer option configurations.
12. See Exhaust Options section on page 28 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
) to No.
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 28 for addi-
tional economizer option configurations.
10. See the Exhaust Options section on page 28 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
Demand Level Hi Heat On
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.ON
VAV Occupied Cool On Delta
V.C.OF
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)
Summary of Contents for WEATHERMAKER 48AJ020
Page 95: ...95 Fig 13 Typical Main Control Box Wiring Schematic A48 7787 ...
Page 96: ...96 TO NEXT PAGE Fig 14 Auxiliary Control Box Wiring Schematic A48 7294 ...
Page 98: ...98 Fig 15 Typical 2 Stage Gas Heat Wiring Schematic Size 051 and 060 Units Shown A48 6866 ...
Page 102: ...102 TO NEXT PAGE Fig 18 Typical Power Schematic Size 051 and 060 Units Shown A48 7298 ...
Page 104: ...104 Fig 19 Controls Option Wiring Schematic A48 7810 ...
Page 105: ...105 Fig 20 Small Chassis Component Location Size 020 035 Units A48 7301 ...
Page 106: ...106 Fig 21 Large Chassis Component Locations Size 036 060 Units A48 7302 ...