Lennox PRODIGY M2 User Manual

8. Power Exhaust Operation
Page 35
PRODIGYT M2 UNIT CONTROLLER
Option
2−Stage Exhaust (cont’d)
Input1
Input2
Setpoints # Deadband
Option
ECTO 8.16
Enabled when
I
npu
t1
I
npu
t2
Default ECTO Default ECTO
9 Always
A133 Digital Input 1
A133 Digital Input 2
10 Occupied
A133
Digital
Input
1
(P194−1)(TB18−1)
(Pressure Switch S37)
A133
Digital
Input
2
(P194−2) (Pressure
Switch S39)
Input energized by pressure switch setting.
11 Blower is energized
(Pressure Switch S37) Switch S39)
pgyp g
Units equipped with an A133 board set for VAV operation and two−stage exhaust fans use the A55_P265−11 output to energize the exhaust relay for
stage one when enabled. Stage two will not energize until 0 seconds default (ECTO 8.25) after stage one. Stage 1 will not de−energize until stage two
has been de−energized for 100 Seconds (ECTO 8.22).
VAV units with VFDs could use this option for two stage operation. In that case, the A55_P265−11 output is used to enable the VFD and the exhaust
fan will operate at speed set with ECTO 8.17 (50% default) for stage 1 and ECTO 8.18 for stage 2.
12
Always
−0.3"w.c. 8.20 1 0.04 VDC 8.21
12
Al
ways
−0.42"w.c.(1) 8.23 2 0.25"w.c.
(1)
8.24
13
Occupied
−0.3"w.c. 8.20 1 0.04 VDC 8.21
13
O
ccup
i
e
d
A133 Analog Input 2 (TB18−7)(P194−7) (Pressure
−0.42"w.c.(1) 8.23 2 0.25"w.c.
(1)
8.24
14
Blower is energized
A133
Analog
Input
2
(TB18 7)(P194 7)
(Pressure
Sensor A34)
−0.3"w.c. 8.20 1 0.04 VDC 8.21
14
Bl
ower
i
s energ
i
ze
d
−0.42"w.c.(1) 8.23 2 0.25"w.c.
(1)
8.24
15
A133 Digital Input 1 (P194−1)
−0.3"w.c. 8.20 1 0.04 VDC 8.21
15
A133
Digital
Input
1
(P194 1)
is energized (Enable Switch)
−0.42"w.c.(1) 8.23 2 0.25"w.c.
(1)
8.24
(1)
Settings must be adjusted for proper operation.
Units equipped with an A133 board set for VAV operation and two−stage exhaust fans use the exhaust fan relay for stage one when Digital Input 1
(P194−1) is energized and enabled. The A133_P194−5 output energizes the exhaust fan relay K201 for stage two when Digital Input 2 (P194−2) is
energized and enabled. Stage two will not energize until 0 seconds default (ECTO 8.25) after stage one. Stage 1 will not de−energize until stage two
has been de−energized for 100 Seconds (ECTO 8.22). This option typically would have two building pressure switches connected to the two Digital
Inputs.
VAV units with VFDs could use this option for two stage operation. In that case, the A55_P265−11 output is used to enable the VFD and the exhaust
fan will operate at speed set with ECTO 8.17 (50% default) for stage 1 and ECTO 8.18 (100% default) for stage 2.
Option
ECTO
VFD Exhaust With Low Speed Cycling
Setpoints
Setpoints During
Smoke Alarm
Minimum Speed
ECTO
8.16
Enabled when Input Default ECTO Default ECTO Default ECTO
16 Always A133 Analog Input 2
(TB18 7) (P194 7)
−0.30"w.c. 8.20 −0.30"w.c. 8.19 10%
(1)
8.21
17 Occupied
(TB18−7) (P194−7)
(Pressure Sensor A34)
18 Blower is energized
(Pressure
Sensor
A34)
19 A133 Digital Input 1 (P194−1)
is energized (Enable Switch)
(1)
Settings must be adjusted for proper operation.
Units with exhaust VFDs use this option for variable speed exhaust operation. The A55_P265−11 output is used to enable the VFD. The VFD will vary
the exhaust motor speed to maintain the static pressure setpoint (ECTO 8.20). ECTO 8.20 must be adjusted for this operation. If exhaust operates at
minimum speed for a time period of 30 seconds, it will de−energize for a minimum time period of 30 seconds. Exhaust will energize when feedback
exceeds the setpoint by 10%. This option typically would have a building pressure sensor connected to the Analog Input
The PID loop proportional (P) constant may be adjusted by ECTO 8.23, integral (I) constant may be adjusted by ECTO 8.24, derivative may be ad-
justed by E.CTO 8.25 and the reset value may be adjusted by ECTO 8.22.
VFD Exhaust
Setpoints
Setpoints During
Smoke Alarm
Minimum Speed
20 Always
21 Occupied
A133 Analog Input 2
(1)
22 Blower is energized
A133
Analog
Input
2
(TB18−7)(P194−7)(Pres-
sure Sensor A34)
−0.30"w.c. 8.20 −0.30"w.c. 8.19 10%
(1)
8.21
23
A133 Digital Input 1 (P194−1)
is energized (Enable Switch)
sure
S
ensor
A34)
(1)
Settings must be adjusted for proper operation.
Units with exhaust VFDs use this option for variable speed exhaust operation. The A55_P265−11 output is used to enable the VFD. The VFD will vary
the exhaust motor speed to maintain the static pressure setpoint (ECTO 8.20). ECTO 8.20 must be adjusted for this operation. Exhaust fan will not
cycle off while enabled. This option typically would have a building pressure sensor connected to the Analog Input.
The PID loop proportional (P) constant may be adjusted by ECTO 8.23, integral (I) constant may be adjusted by ECTO 8.24, derivative may be ad-
justed by ECTO 8.25 and the reset value may be adjusted by ECTO 8.22.

Lennox PRODIGY M2 Specifications

General

Brand	Lennox
Model	PRODIGY M2
Category	Controller
Language	English