Lennox PRODIGY2.0 User Manual

127
Table 63. M3 Control Parameters
Control Parameter
DescriptionUnits
Control Value
No DescriptionUnitsMax.DefaultMin.
Parameter Short
Description
Screen Name
164
ECONOMIZER
PROFILE
Economizer Profile 0 2 3 Option
These are the operating profile
options for the economizer
damper during free cooling
when any compressor is on and
can be selected as follows:
Option 0: Damper continues to
modulate while compressors
are on, but the effect of mech
anical cooling may force the
damper closed to its minimum
position. After compressor
starts, the free cooling setpoint
is lowered to a fixed temperat
ure of 45°F.
Option 1: Damper opens to its
maxopen position (parameter
131 - FREE CL MAX DAMPER)
when any compressors start.
NOTE: When using Option 1
and after the compressor is
stopped, the M3 shall resume
damper modulation.
Option 2: Damper continues to
modulate while compressors
are on, but the effect of mech
anical cooling may force the
damper closed to its minimum
position. This is the factory de
fault setting.
 Holdsoff compressor on Y2
call until damper has modu
lated to maximum position
(parameter 131 - FREE CL
MAX DAMPER) for three
minutes.
 After three minutes, com
pressor starts and the free
cooling setpoint is lowered to
45°F. Damper is not locked
at maximum open while
compressor is on, but modu
lates to maintain 45°F dis
charge air temperature.
 When Y2 is satisfied, com
pressor goes off and free
cooling setpoint is restored
to 55°F (parameter 159 -
FREE COOL SUPPLY SP).
Option 3: Same as Option 2,
but with a 10 minute delay in
stead of a three minute delay.
System 2 Parameters
165 FAH STAGE DIFFER
Fresh Air Heating Stage
Differential
0.0 2.0 20.0 °F
 Fresh Air Heating stage dif
ferential.
 0 value for first stage heating
only for Fresh Air Heating.
166 FAH REHEAT OAT SP
Fresh Air Heating
Control Reheat Outdoor
Air Temperature Set
Point
20.0 45.0 60.0 °F
Outdoor air temperature set
point that enables fresh air
heating for reheat demand and
opens damper to parameter 167
when outdoor air is less than
set point.

Lennox PRODIGY2.0 Specifications

General

Brand	Lennox
Model	PRODIGY2.0
Category	Controller
Language	English