Off Delay In Zone Sensor Mode - Lennox Prodigy M2 Application Manual

The number of stages achieved depends on the type of equipment and whether or not an economizer is used. On units with
economizers, free cooling becomes stage 1 and all compressor stages shift up one stage. On units with 4 compressors and
an economizer, compressors 3 and 4 are controlled together for stage 4. See figure 3 and the ECTO parameters in table 6.
2.2.5.

Off Delay in Zone Sensor Mode

In Zone Sensor Mode, the M2 initiates a 2−minute off delay on any power−up or reset. During the 2−minute delay, no blower,
heating, or cooling operation will occur. This delay may be adjusted to stagger the start of each unit, reducing the initial power
demand. (ECTO 5.25).
2.2.6. Blower Operation in Zone Sensor Mode
In Zone Sensor Mode, default operation, the M2 cycles the blower with a heat/cool demand. ECTO 6.17 can be changed to
allow continuous blower operation.
Control Parameter
No. Name Min.
0
1.18 Sup_HT_1_ Diff
0
0
1.19 Sup_HT_2_ Diff
0
Sup_HT_1_
1.20 0
Latch_Option
Sup_HT_2_
1.21 0
Latch_Option
0
Sup_HT_1_
1.22
StgUp_Timer 0
Sup_HT_2_ 0
1.23
StgUp_Timer 0
0
1.24 StgDn_Timer
0
2.06 Stg_Latch_Option 0
0
2.07 StgUp_Timer
0
0
2.08 StgDn_Timer
0
Stg_Latch_
3.10 0
Option
0
3.11 StgUp_Timer
0
0
3.12 StgDn_Timer
0
0
4.17 Stg_2_Latch
0
4.18 Stg_3_Latch
0
4.19 Stg_4_Latch
0
Stg_2_StgUp_
4.20
Timer 0
Table 6. Zone Sensor ECTO Summary
Control Value
Default Max
Units
Heat Pump Heating
8 15 Counts
2 3.75 W:DegF
12 15 Counts
3 3.75 W:DegF
0 1 Option
0 1 Option
0 225
Counts
0 3600 F:Sec
0 225 Counts
0 3600 F:Sec.
19 225
Counts
304 3600 F:Sec
0 1 Option
225
57 Counts
912 3600 F:Sec
225
0 Counts
0 3600 F: Sec
0 1 Option
57 225 Counts
912 3600 F: Sec
0 225 Counts
0 3600 F: Sec
0 1
Option
0 1
Option
0 1
Option
57 225
Counts
912 3600 F:Sec
Description
Supplemental heat stage 1 differential. Used in zone sensor applications.
Note: Differential temperature must be = to or < ECTO 1.19.
Supplemental heat stage 2 differential. Used in zone sensor applications.
Note: Differential temperature must be = to or > ECTO 1.18
Supplemental heat stage 1 latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
Supplemental heat stage 2 latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
Supplemental heat stage 1 stage−up timer. The maximum time that stage 1 runs
before calling supplemental heat stage 1.
Used in zone sensor applications. Disabled if set to 0.
Supplemental heat stage 2 stage−up timer. The maximum time that supplemental
heat 1 runs before calling supplemental heat stage 2.
Used in zone sensor applications. Disabled if set to 0.
Time delay before a lower stage turns off following a higher stage termination.
Used in zone sensor applications.
Electric Heat
Stage latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
Stage up timer. The maximum time that lower stage runs before calling next heat
stage. Used in zone sensor applications. Disabled if set to 0.
Time delay before a lower stage turns off following a higher stage termination.
Used in zone sensor applications.
Gas Heat
Stage latch option. Used in zone sensor applications.
0: Latch Disabled 1: Latch Enabled
Stage−up timer. The maximum time that lower stage runs before calling next heat
stage. Used in zone sensor applications. Disabled if set to 0.
Time delay before a lower stage turns off following a higher stage termination.
Used in zone sensor applications.
Cooling
Stage 2 latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
Stage 3 latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
Stage 4 latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
Stage 2 stage up timer. The maximum time that cooling stage 1 runs
before calling cooling stage 2. Used in zone sensor applications.
Disabled if set to 0.
Page 9
2. Main Controller Operation
table continued on next page
PRODIGYT M2 UNIT CONTROLLER