Lennox Prodigy M2 Application Manual page 75

Control Parameter
No. Name Min.
Reheat_
4.24 0
Control
0
4.25 Reheat_SP
0
Reheat_ 1
4.26
RH_DB 1
81
4.27 FC_LAL_SP
80
5.01 SMK_Alarm 0
Error_Timed_ 8
5.02
Off_Delay 64
5.03 Display_Temp 0
Control Value
Default Max.
Units
Block 4 Cooling Parameters (continued)
0 7 Option
60 100 Counts
60 100 P:%RH
3 10 Counts
3 10 P:%RH
120 136 Counts
55 45 Y:DegF
Block 5 Miscellaneous Parameters
0 7 Option
38 225 Counts
304 1800 C:Sec.
0 1 Option
17. Electronic Configure To Order (ECTO) Control Parameters
Description
Reheat Control Mode
0− No reheat.
1− Supermarket reheat using De−Humidistat (Tstat mode only)
2− Supermarket reheat using RH sensor.
3− Humiditrol reheat. Conditions: Blower must be energized, Must
be occupied, At least one previous cooling demand.
4− RH measurement / display. No Supermarket or Humiditrol re-
heat.
5− Humiditrol reheat. Conditions: At least one previous cooling
demand.
6− Humiditrol reheat. Conditions: Blower must be energized, Must
be occupied.
7− Humiditrol reheat. Conditions: None
Percent relative humidity where supermarket or Humiditrol reheat
demand is energized. Used of Reheat option 2,3,5,6,or 7. Reheat is
de−energized at setpoint – deadband (ECTO 4.26).
If value = 100, Humiditrol reheat is controlled by
the digital input A55_P299−8 Digital Input 4 only.
Energized input signal calls for reheat demand.
L Connection Network RH setpoint will
override this setpoint. (Such as from NCP).
Reheat RH deadband.
Used of Reheat option 2,3,5,6,or 7. Reheat is on when RH>=ECTO
4.25 and off when RH< ECTO 4.25 – ECTO 4.26.
Free−cooling Low Ambient Lockout Setpoint.
When outdoor air is suitable for free cooling and an economizer is
present, the compressor will not run when ambient is below this val-
ue. A value of 207 (0 degF) disables this feature. A value of 81 (80
degF) locks out compressor operation whenever OAS, regardless of
OAT.
Smoke alarm control options.
0− Unit off.
1− Blower on, exhaust fan off, OD air damper open (positive pres-
sure)
2− Blower on, exhaust fan on, OD air damper closed (negative
pressure). On VAV units, exhaust fan will run at speed set in
ECTO 8.19 with blower).
3− Blower on, exhaust fan on, OD air damper open (purge). On
VAV units, exhaust fan will run at speed set in ECTO 8.19.
4− Blower off, exhaust fan on, OD air damper closed (negative
pressure). On VAV units, exhaust fan will run at speed set in
ECTO 8.19.
5− Blower on, exhaust fan on, OD air damper closed (negative
pressure). On VAV units, exhaust fan will run to maintain pres-
sure setpoint set in ECTO 8.19 with blower).
6− Blower on, exhaust fan on, OD air damper open (purge). On
VAV units, exhaust fan will run to maintain pressure setpoint set
in ECTO 8.19.
7− Blower off, exhaust fan on, OD air damper closed (negative
pressure). On VAV units, exhaust fan will run to maintain pres-
sure setpoint set in ECTO 8.19.
Off time delay if a no−run" error occurs. Off delay for error codes 5,
10, 11, 20, 21, 44, 45, 83, 86, 87 and 114.
Degrees Celsius option for A55 Display
0: Displays degrees Fahrenheit
1: Displays degrees Celsius
Page 75
OFF
4.25−4.26
table continued on next page
PRODIGYT M2 UNIT CONTROLLER
ON
4.25