Lennox Core Unit Controller Setup Manual page 62

Control
Parameter Screen Name
No
DACC STAGE
185
DIFFER
SRV OUTPT
186
CTRL MODE
SRV OUTPT SP
187
C02
SRV OUTPT SP
188
RH
SRV OUTPT SP
189
TEMP
SRV OUTPT DB
190
C02
Table 12. CORE Control System Unit Parameters
Parameter Short
Description
Min.
Discharge Air
Cooling Stage 2
Differential
Service Output
0
Control Mode
Service Output
Set Point for 0
Carbon Dioxide
Service Output
Set Point for 0
Relative Humidity
Service Output
Set Point -31
Temperature
Service Output
Deadband for 16
Carbon Dioxide
Control Value
Default Max.
2 20
0 127
996 2000
100 100
51 132
102 2000
62
Units Description
°F Discharge Air Cooling stage differential.
A55 Service Output Control Mode = X +
32*Y + 16*Z
Input source = X:
• 0 = None
• 1 = Compressor 1 duty cycle.
(Compressor crankcase heater
function.)
> On when outdoor air
temperature is less than
or equal to Parameter 189
and greater than or equal to
Parameter 192 seconds have
passed with compressor 1 off.
> Off when Outdoor Air
temperature is greater than
Parameter 189 plus 3°F (fixed
dead-band) or is less than
Parameter 192 seconds have
passed with compressor 1 off
• 2 = On when occupied.
• 3 = On when blower on,
• 4 = On when heating demand.
• 5 = On when cooling demand.
Option • 6 = On when heating or cooling
demand.
• 7 = System Relative Humidity (A55_
P298_5 RH)
• 8 = System Indoor Air Quality. (A55_
P298_3 IAQ)
• 9 = System Outdoor Air Temperature
(A55_P267_1/2 OAT)
• 10 = Energy Recovery System
• 11 = SCR Option for Electric Heat
Algorithm Y for input sources 7 - 9:
• 0 = Hysteresis loop (see sections
14.2 - 14.4)
• 1 = Window - On when input is in
range; (see sections 14.2 - 14.4)
• 2 = Delayed-on. (see sections 14.2
- 14.4)
• 3 = Delayed-off. (see sections 14.2
- 14.4)
Inversion Z:
• 0- Output not inverted.
• 1- Output inverted.
ppm A55 service relay output set point.
Service Output Set Point for Relative
%
Humidity
°F Service Output Set Point Temperature
A55 service relay output dead-band or
ppm
delay.