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KOOLMASTER PP20-VS2 rev.00
KOOLMASTER PP20-VS2
5.2.3. Modifying Curve Points
You can adjust the temperature set point as-
sociated to all curve points while the curve
is running.
Select:
1.
Current Conditions (Main Menu)
Set Point
Temp Curve
Add/Subs Temp
* Accessible while the curve is running only.
Add/Subs Temperature Curve
Curve Offset
0.0 °F
Set the following parameters:
2.
Temperature curve offset —
Select the num-
ber of degrees that need to be removed or
added to all set points of the temperature
curve (+/- 10°F). *
Accessible if the temperature
curve is currently running.
VENTILATION & COOLING
6.
6.1. Minimum Ventilation
Minimum Ventilation Cycles
6.1.1.
Definition:
Minimum ventilation cycles are
activated when the average room temperature
is below the start temperature of fan stage 1.
Running the fans even though ventilation is
not required for reducing the room tempera-
ture is useful to reduce humidity levels and
supply oxygen to the room. It also prevents
the fans from freezing in winter.
Minimum ventilation timer:
The minimum
ventilation timer is composed of an
“On Time”
and of a
“Cycle Time”
. The fans stay on during
the
“On Time”
then stop until the end of the
cycle. This timer is common to all programs
of the controller.
Min.Vent
Fan Status
ON
OFF
Time
ON Time
Cycle Time
Minimum
Ventilation Timer
Minimum ventilation fans:
If variable outputs
are enabled, minimum ventilation cycles are
ensured by the variable-speed fans of stage 1
and by chosen On/Off fans (optional). If vari-
able outputs are not used, minimum ventila-
tion is ensured by On/Off fans only. Refer to
section 4.8.2 to assign these On/Off fans
and refer to section 4.9 to assign variable
fans to stage 1.
Automatic adjustment of the min. vent. rate
If variable-speed fans are used in minimum
ventilation, the controller can automatically
increase the minimum ventilation rate over
time with curves: a curve can be defined to
increase the minimum ventilation fan speed
over time and another curve can be defined to
increase the run time of the fans.
*Refer to sec-
tion 4.5 to enable the Speed and/or the On Time curve
and refer to section 6.1.3 to define these curves.
Night fan speed:
If the nighttime minimum
ventilation function is enabled (section 4.10),
you can select another minimum ventilation
fan speed which will be used at night.
6.1.2. Min Ventilation Settings
Select:
1.
Current Conditions (Main Menu)
Min Vent
Minimum Ventilation
Use to navigate
Variable 1
Minimum Speed
35 %
Night Speed
25 %
Status
On
On Time
15 sec
Cycle Time
120 sec
Min Speed St2+
50 %
Variable 2
Minimum Speed
35 %
Night
25 %
Status
On
On Time
15 sec
Cycle Time
120 sec
Min Speed St2+
50 %
Relay Status
On
On time
15 sec
Cycle time
120 sec
Set the following parameters:
2.
Variable 1-2 minimum ventilation speed (regu-
lar & night speeds) —
Specify the minimum
ventilation speed of each variable fan; this is
the speed of the fans during the
“On Time”
portion of minimum ventilation cycles. If night
minimum ventilation is enabled in section
4.10, set the minimum speed separately for
day and night. Also note that the minimum
ventilation speed must be higher than the ab-
solute minimum speed of the variable output
(as defined in section 4.5). *
This parameter is
accessible if variable fans are assigned to stage 1. In
addition, this parameter can only be modified while
the speed curve is inactive (sec. 6.1.2.2).
Variable 1-2 status —
Set the status of each
variable output: select
“On”
if the output is
used in minimum ventilation; select
“Off”
if
it is not. *
This parameter is accessible if variable
fans are assigned to stage 1.
On Time &
“Cycle Time”
of Var. outputs 1-2 —
Set the minimum ventilation timer separately for
each variable output. The timer is composed of
an
“On Time”
and
“Cycle Time”
. Note that the
“Cycle Time”
includes the
“On Time”
, it must thus
be longer than the
“On Time”
. *
This parameter is
common to all programs.
Min Speed Stage 2+ for Var. Outputs 1-2 —
Set the speed at which each variable output
starts running at the beginning of stage 2 and
beyond (see sec. 6.2).
Summary of Contents for Koolmaster PP20-VS2
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