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KOOLMASTER PP20-VS2 rev.00

KOOLMASTER PP20-VS2

Temperature Compensation —

The temperature

compensation is expressed as a percentage
per degree difference between the ambient
temperature and the average reading of the in-
let’s probes. For each degree above or below
the average temperature, the inlet will open or
close using the compensation value.

Operating mode —

Select

“Auto”

to let the

controller to control the opening of the chosen
air inlet; select ”Manual” to change the inlet
position manually (the controller does not
set off any opening alarm when an inlet is
controlled manually).

Manual mode —

This menu appears when the

air inlet is in manual mode. Select

“Open”

“Close”

to move the actuator or select

“Off”

to stop it.

If the inlet is controlled by a timer, please
make a manual reset of the actuator’s
position after each manual opening of
the air inlet (see section 6.5.3).

Test mode —

This is the room temperature

that is used in test mode. This value can only
be modified in the

“Test Mode”

menu (see

section 4.12).

Min Fan Speed —

During the minimum ventila-

tion cycles and in stage 1, the inlet will use its
minimum ventilation position as long as the
fan speed is lower than the

“Min Fan Speed”

and will start opening further if the fan speed
gets higher than this. Set the minimum fan
speed to the desired value.

Closed —

This is the position of the air inlet

during the

“Off Time”

portion of minimum

ventilation cycles. Set this position to the
desired value.

Min Vent —

This is the position of the air inlet

during the

“On Time”

portion of a minimum

ventilation cycle.

Stage #x —

Assign an inlet opening (in %)

with the startup of each fan stage.

Stage #x max —

Assign the inlet opening that

is reached when the variable-speed fan stage
reaches its maximum intensity.

• Over-Opening Settings

Opening

— Assign an inlet position to

the over-opening stage.

Bandwidth

— Set the temperature range

over which the inlet gradually opens from
the position associated with the last fan
stage towards the over-opening position
(see previous graph).

Total opening time —

Enter the exact time that

is required to reach the actuator’s maximum
limit switch. The controller will limit the open-
ing of the inlet according to this parameter
value. *

This parameter is accessible if the air inlet

uses a timer. It is also common to all programs.

Under Run Open Time (Advanced parameter
for timer-based inlets only) —

When a timer

ends, it may take a few seconds for the actua-
tor to actually stop moving. For this reason,
the controller can switch off the actuator’s
motor slightly before its time for the actua-
tor to reach its exact moving time without
exceeding it. This parameter ranges from
0 to 3 seconds.*

This parameter is only accessible

with the factory password and it is only shown if the

selected inlet uses a timer.

6.5.3. Actuator Reset

[For timer-based inlets only]

No reset can be made when the outside
temperature falls to a user-defined value.
This applies to automatic & manual
resets.

Resetting the actuator’s position is used to
clear  accumulated  time  offsets  caused  by
the  frequent  openings  and  closings  of  the
inlet.  The  controller  resets  the  actuator’s
position at regular intervals to make sure the
inlet position is always accurate. This reset
is performed automatically according to one
of these two methods:

Reset the minimum position only

(Close mode)

Each time a reset is performed, the inlet to-
tally closes. Once the actuator’s position is
reset, the inlet returns to its previous position.
The

“Close”

pilot light of the inlet flashes while

the controller closes the inlet.

Reset toward the nearest position

(Open/Close mode)

If the current inlet position is higher than 50%
at the reset time, the controller fully opens
the inlet to reset the actuator’s position; if
the current inlet position is lower than 50%,
the controller closes the inlet to perform the
reset. This way, the inlet never closes when
the room temperature already asks for a wide
opening. The

“Open”

“Close”

pilot light of

the inlet flashes while the controller moves
the inlet.

Make sure limit switches are located at
both ends of the actuators when using
this resetting method.

Inlet 1 Settings

Inlet 2

Auto Reset

Calib

Use to navigate

Position

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