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27
Table 40B — Air Quantity Limits (50AJ,AK,AW,AY,A2,A3,A4,A5)
*Operation at these levels may be limited by entering evaporator air wet bulb temperatures.
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. For wiring information, refer
to unit wiring diagrams in the Major System Components sec-
tion on page 101.
Two-Stage Constant Volume Units with
Mechanical Thermostat —
To configure the unit, per-
form the following:
1. The type of control is configured under
Configuration
UNIT
C.TYP
. Set
C.TYP
to 4 (TSTAT 2 STG).
2. Remove jumpers from R-W2 and W2-W1 on TB4 in the
control box.
3. See Economizer Options section on page 28 for addition-
al economizer option configurations.
4. See Exhaust Options section on page 29 for additional
exhaust option configurations.
Two-Stage Constant Volume Units with Space
Sensor —
To configure the unit, perform the following:
1. The type of control is configured under
Configuration
UNIT
C.TYP
.
Set
C.TYP
to 6 (SPT 2 STG).
2. Under
Configuration
UNIT
SENS
SPT.S
, enable
the space sensor by setting
SPT.S
to ENBL (enable).
3. Install jumpers between R-W2 and W2-W1 on TB4 in
the control box.
4. The space temperature set points are configured under the
Setpoints
menu. The heating and cooling set points may
be configured. See the Heating Control and Cooling
Control sections on pages 50 and 37 for further descrip-
tion on these configurations. The following set points
may be configured:
5. 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.
The following set points may be configured:
6. Under
Configuration
UNIT
CV.FN
, set
CV.FN
to 1
for continuous fan or 0 for automatic fan.
7. To program time schedules, set
SCH.N
=1 under
Config-
uration
CCN
SC.OV
SCH.N
to configure the
control to use local schedules.
8. Under the
Timeclock
SCH.L
submenu, enter the
desired schedule. See Time Clock Configuration section
on page 75 for further description of these configurations.
9. Under the
Configuration
CCN
SC.OV
submenu, the
following schedules and overrides should be configured:
10. See Economizer Options section on page 28 for addition-
al economizer option configurations.
11. See Exhaust Options section on page 29 for additional
exhaust option configurations.
UNIT
COOLING
ELECTRIC HEAT
Min CFM
Max CFM*
Min CFM
Max CFM
50AJ,AW,A2,A3020
6,000
10,000
6,000
15,000
50AK,AY,A4,A5020
4,000
10,000
50AJ,AW,A2,A3025
7,500
12,500
50AK,AY,A4,A5025
5,000
12,500
50AJ,AW,A2,A4027
8,100
13,500
50AK,AY,A3,A5027
5,400
13,500
50AJ,AW,A2,A4030
9,000
15,000
50AK,AY,A3,A5030
6,000
15,000
50AJ,AW,A2,A4035
10,500
17,500
50AJ,AW036
10,500
17,500
50AK,AY,A3,A5035
7,000
17,500
50AK,AY036
7,000
17,500
50AJ,AW,A2,A4040
12,000
20,000
10,500
20,000
50AJ,AW041
12,000
20,000
50AK,AY,A3,A5040
8,000
20,000
50AK,AY041
8,000
20,000
50AJ,AW,A2,A4050
13,500
20,000
50AK,AY,A3,A5050
10,000
20,000
50AJ,AW051
18,000
27,000
15,000
27,000
50AJ,AW,A2,A4060
18,000
27,000
50AK,AY051
12,000
27,000
50AK,AY,A3,A5060
12,000
27,000
IMPORTANT: The
Comfort
Link controls provide the user
with numerous configuration options such as set points,
demand levels, reset, and many others. If the building
owner or design engineer has not provided specific recom-
mendations for these configuration settings, it is suggested
that the installer do not make changes to the default factory
settings. The factory-configured default values are appro-
priate for many applications.
IMPORTANT: The unit is shipped with the unit control
disabled. Enable the control by setting Local Machine Dis-
able (
Service Test
STOP
) to No.
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?
Summary of Contents for WEATHERMAKER 48/50AJ
Page 103: ...103 Fig 15 Typical Main Control Box Wiring Schematic 48 50AJ AK AW AY Units cont a48 8355 ...
Page 104: ...104 Fig 16 Typical Main Control Box Wiring Schematic 48 50A2 A3 A4 A5 Units a48 8355 ...
Page 105: ...105 TO NEXT PAGE Fig 17 Typical Auxiliary Control Box Wiring Schematic A48 7294 ...
Page 106: ...106 Fig 17 Typical Auxiliary Control Box Wiring Schematic cont a48 8356 ...
Page 107: ...107 Fig 18 Typical 2 Stage Gas Heat Wiring Schematic Size 051 and 060 Units Shown a48 8357 ...
Page 113: ...113 Fig 22 Typical Power Schematic 48 50A2 A3 A4 A5060 Unit Shown ...
Page 114: ...114 SW1 SW2 OR DEHUMIDIFY SWITCH Fig 23 Typical Controls Option Wiring Schematic a48 8361 ...
Page 115: ...115 Fig 24 Typical Small Chassis Component Location Size 020 035 Units a48 8362 ...
Page 116: ...116 Fig 25 Typical Large Chassis Component Locations Size 036 060 Units A48 7302 ...
Page 169: ...169 APPENDIX C VFD INFORMATION cont Fig F Internal Enclosure Fan Replacement A48 7716 ...