Table 40B -- Air Quantity Limits (50AJ,AK,AW,AY,A2,A3,A4,A5)
UNIT COOLING ELECTRIC HEAT
Min CFM Max CFM
50AJ,AW, A2,A3020
50A K,AY,A4,A5020
50AJ,AW, A2,A3025
50A K,AY,A4,A5025
50AJ,AW, A2,A4027
50A K,AY,A3,A5027
50AJ,AW, A2,A4030
50A K,AY,A3,A5030
50AJ,AW, A2,A4035
50AJ,AW036
50A K,AY,A3,A5035
50AK,AY036
50AJ,AW, A2,A4040
50AJ,AW041
50A K,AY,A3,A5040
50AK,AY041
50AJ,AW, A2,A4050
50A K,AY,A3,A5050
50AJ,AW051
50AJ,AW, A2,A4060
50AK,AY051
50A K,AY,A3,A5060
Min CFM
6,000
4,000
7,500
5,000
8,100
5,400
9,000
6,000
10,500
10,500
7,000
7,000
12,000
12,000
8,000
8,000
13,500
10,000
18,000
18,000
12,000
12,000
Max CFM*
10,000
10,000
12,500
12,500
13,500
13,500
15,000
15,000
17,500
17,500
17,500
17,500
20,000
20,000
20,000
20,000
20,000
20,000
27,000
27,000
27,000
27,000
*Operation at these levels may be limited by entering evaporator air wet bulb temperatures.
6,000
10,500
15,000
15,000
20,000
27,000
CONTROLS QUICK START
The following section will provide a quick user guide to set-
ting up and configuring the A Series units with (_l_fortLink TM
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.
IMPORTANT: The (_nfortLink 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.
Two-Stage Constant Volume Units with
Mechanical Thermostat E 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 E To configure the unit, perform the following:
1. The type of control is configured under (bnfiguration
--+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
5.
6.
7.
10.
11.
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:
OHSP Occupied Heat Setpoint
O(SP Occupied Cool Setpoint
UHSP Unoccupied Heat Setpoint
U_SP Unoccupied Cool Setpoint
GAP Heat-Cool Setpoint Gap
The degrees of demand from the space temperature set
points are configured under the (bnfiguration--+D.LET
submenu. See the Heating Control and Cooling Control
sections for further description on these configurations.
The following set points may be configured:
L.H.ON
H.H.ON
L.H.OF
L.C.ON
H.C.ON
L.C.OF
Demand Level Lo Heat On
Demand Level Hi Heat On
Demand Level Lo Heat Off
Demand Level Lo Cool On
Demand Level Hi Cool On
Demand Level Lo Cool Off
Under (bnfiguration-+UNIT_'V..FN, set CV.FN to 1
for continuous fan or 0 for automatic fan.
To program thne schedules, set SCH.N=I under (bnfig-
uration_CCN-+SCOV--+SCH.N to configure the
control to use local schedules.
8. Under the Timeclock-+SCI-I.L submenu, enter the
desired schedule. See Time Clock Configuration section
on page 75 for further description of these configurations.
9. Under the Configuration_'CN-cSC.OV submenu, the
following schedules and overrides should be configured:
O.T.L Ovemde time limit
SPT.O SPT override enabled?
7"58.0 T58 ovemde enabled?
See Economizer Options section on page 28 for addition-
al economizer option configurations.
See Exhaust Options section on page 29 for additional
exhaust option configurations.
27
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