2. Main Controller Operation
Page 9
PRODIGYT M2 UNIT CONTROLLER
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.
Table 6. Zone Sensor ECTO Summary
Control Parameter
No. Name
Control Value
Min. Default Max
Units Description
Heat Pump Heating
1.18 Sup_HT_1_ Diff
0
0
8
2
15
3.75
Counts
W:DegF
Supplemental heat stage 1 differential. Used in zone sensor applications.
Note: Differential temperature must be = to or < ECTO 1.19.
1.19 Sup_HT_2_ Diff
0
0
12
3
15
3.75
Counts
W:DegF
Supplemental heat stage 2 differential. Used in zone sensor applications.
Note: Differential temperature must be = to or > ECTO 1.18
1.20
Sup_HT_1_
Latch_Option
0 0 1 Option
Supplemental heat stage 1 latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
1.21
Sup_HT_2_
Latch_Option
0 0 1 Option
Supplemental heat stage 2 latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
1.22
Sup_HT_1_
StgUp_Timer
0
0
0
0
225
3600
Counts
F:Sec
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.
1.23
Sup_HT_2_
StgUp_Timer
0
0
0
0
225
3600
Counts
F:Sec.
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.
1.24 StgDn_Timer
0
0
19
304
225
3600
Counts
F:Sec
Time delay before a lower stage turns off following a higher stage termination.
Used in zone sensor applications.
Electric Heat
2.06 Stg_Latch_Option 0 0 1 Option
Stage latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
2.07 StgUp_Timer
0
0
57
912
225
3600
Counts
F:Sec
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.
2.08 StgDn_Timer
0
0
0
0
225
3600
Counts
F: Sec
Time delay before a lower stage turns off following a higher stage termination.
Used in zone sensor applications.
Gas Heat
3.10
Stg_Latch_
Option
0 0 1 Option
Stage latch option. Used in zone sensor applications.
0: Latch Disabled 1: Latch Enabled
3.11 StgUp_Timer
0
0
57
912
225
3600
Counts
F: Sec
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.
3.12 StgDn_Timer
0
0
0
0
225
3600
Counts
F: Sec
Time delay before a lower stage turns off following a higher stage termination.
Used in zone sensor applications.
Cooling
4.17 Stg_2_Latch
0 0 1
Option
Stage 2 latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
4.18 Stg_3_Latch
0 0 1
Option
Stage 3 latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
4.19 Stg_4_Latch
0 0 1
Option
Stage 4 latch option. Used in zone sensor applications.
0: Latch Disabled
1: Latch Enabled
4.20
Stg_2_StgUp_
Timer
0
0
57
912
225
3600
Counts
F:Sec
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.
table continued on next page
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