Lennox PRODIGY M2

6. Reheat Operation
Page 21
PRODIGYT M2 UNIT CONTROLLER
Table 15. Outside Air for Dehumidification Conditions
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.
Table 16. Summary Of Reheat ECTO Options
No. Name Min Default Max
Units Description
4.24
Reheat_
Control
0 0 7
Option
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 reheat.
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
4.25 Reheat_SP
0
0
60
60
100
100
Counts
P:%RH
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
the digital input A55_P269_9 (M2) only. Ener-
gized input signal calls for reheat demand.
L Connection Network RH setpoint will over-
ride this setpoint. (Such as from NCP).
4.25−4.26
4.25
ON
OFF
4.26
Reheat_
RH_DB
1
1
3
3
10
10
Counts
P:%RH
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.
Table 17. Outside Air for Dehumidification Parameters
No. Name Min Default Max
Units Description
7.02
Reheat_FAH_
OAT_SP
113
60
136
45
175
20
Counts
Y:DegF
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.
7.03
Reheat_FAH
_%_ Damper
5
5
40
40
100
100
Counts
P:%
Fresh air damper position during Fresh Air Heating reheat operation.
7.04
Reheat_FAH
_SP
139
70
138
Disabled
183
40
Counts
X:Deg
F
Fresh Air Heating Reheat setpoint.
Minimum value of 138 disables FAH−Reheat.