Lennox Prodigy M2 Application Manual page 21

ECTO 4.24 Option Outside Air Dehumidification Conditions
1 Not allowed.
2 Allowed. No conditions apply.
3 Allowed, blower must be energized and in occupied mode. No previous cooling demand is required.
4 Allowed. Must be occupied.
5 Allowed, blower must be energized and in occupied mode. No previous cooling demand is required.
6 Allowed. No conditions apply.
7 Allowed. No conditions apply.
No. Name Min
Reheat_
0
4.24
Control
0
4.25 Reheat_SP
0
1
Reheat_
4.26
RH_DB 1
No. Name Min
Reheat_FAH_ 113
7.02
OAT_SP 60
Reheat_FAH 5
7.03
_%_ Damper 5
Reheat_FAH 139
7.04
_SP 70
Table 15. Outside Air for Dehumidification Conditions
Table 16. Summary Of Reheat ECTO Options
Default Max
Units Description
Reheat Control Mode
0−
1−
2−
3−
0 7
Option
4−
5−
6−
7−
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 set-
point – deadband (ECTO 4.26).
If value = 100, Humiditrol reheat is controlled by
60 100
Counts
the digital input A55_P269_9 (M2) only. Ener-
60 100 P:%RH
gized input signal calls for reheat demand.
L Connection Network RH setpoint will over-
ride this setpoint. (Such as from NCP).
Reheat RH deadband.
3 10
Counts
Used of Reheat option 2,3,5,6,or 7. Reheat is on when RH>=ECTO 4.25 and off
3 10 P:%RH
when RH< ECTO 4.25 – ECTO 4.26.
Table 17. Outside Air for Dehumidification Parameters
Default Max Units
136 175 Counts
45 20 Y:DegF
40 100 Counts
40 100 P:%
Counts
138 183
X:Deg
Disabled 40
F
No reheat.
Supermarket reheat using De−Humidistat (Tstat mode only)
Supermarket reheat using RH sensor.
Humiditrol reheat. Conditions: Blower must be energized, Must be occupied, At
least one previous cooling demand.
RH measurement / display. No Supermarket or Humiditrol reheat.
Humiditrol reheat. Conditions: At least one previous cooling demand.
Humiditrol reheat. Conditions: Blower must be energized, Must be occupied.
Humiditrol reheat. Conditions: None
Description
Outdoor air temperature setpoint that enables fresh air heating for reheat demand
and opens damper to ECTO 7.03 when outdoor air is less than setpoint.
Fresh air damper position during Fresh Air Heating reheat operation.
Fresh Air Heating Reheat setpoint.
Minimum value of 138 disables FAH−Reheat.
Page 21
6. Reheat Operation
ON
OFF
4.25
4.25−4.26
PRODIGYT M2 UNIT CONTROLLER