NOVUS N323RHT User Manual

Page 2

Level 1 – Setpoints Adjustment
This level contains the 3 setpoints, SP1, SP2 and SP3. They define the RH and the temperature for the
process. The display shows the parameter name alternating with the current value. Set the desired value
by pressing the keys

and

SP1

Set Point 1

Set point adjustment for control OUTPUT 1. The setting range is limited by the values
in SL1 and Sk1 (this parameter belong to the Configuration level).

SP2

Set Point 2

Set point adjustment for control OUTPUT 2. The setting range is limited by the values
in SL2 and Sk2.

SP3

Set Point 3

Set point adjustment for control OUTPUT 3. The setting range is limited by the values
in SL3 and Sk3.

Level 2 – Configuration Level
Presents a sequence of other parameters that shall be defined by the user. The parameters are shown
alternately with the respective values. In order to obtain the desired values, use the keys

and

rkt

RH - Temp

Defines how the variables, relative humidity and temperature, will be displayed:

Humidity

Temperature

Toggles the indications of relative humidity and temperature every 2 seconds.

Toggles the indications of relative humidity and temperature every 3 seconds.

Toggles the indications of relative humidity and temperature every 4 seconds.

Toggles the indications of relative humidity and temperature every 5 seconds.

For options 0 and 1, a fast click on the

, key forces the other variable to be

displayed for 10 seconds.

Unt

Unit

Temperature Unit - Allows the user to choose the measured temperature presentation
unit.

Temperature in degrees Celsius.

Temperature in degrees Fahrenheit

0fk

Offset Humidity

Correction value for humidity indication. Allows the user to perform small adjustments on

the relative humidity indication, trying to correct measurement errors that appear, for
example, in the sensor replacement. Adjustment range: between –10.0 and 10.0 % of
RH. Default value: 0.0

0ft

Offset

temperature

Correction value for Temperature indication. Allows the user to perform small adjustments

on the relative temperature indication, trying to correct measurement errors that appear,
for example, in the sensor replacement. Adjustment range: between –10.0 and 10.0 % of
RH. Default value: 0.0

Sl1

SP Low Limit 1

Lower limit value for SP1 (minimum value with which SP1 can be configured). Sl1
must be programmed with a lower value than sK1.

Sk1

SP High Limit 1

Upper limit for Sp1 (maximum allowed value for Sp1). sK1 must be programmed with
a value lower than the one configured in sl1.

Sl2

SP Low Limit 2

Lower limit value for SP2 (minimum value with which SP2 can be configured). Sl2
must be programmed with a lower value than sK2.

Sk2

SP High Limit 2

Upper limit for Sp2 (maximum allowed value for Sp1). sK2 must be programmed
with a value lower than the one in sl2.

Sl3

SP Low Limit 3

Lower limit value for SP3 (minimum value with which SP3 can be configured). Sl3
must be programmed with a lower value than sK3.

Sk3

SP High Limit 3

Upper limit for Sp3 (maximum allowed value for Sp3). sK3 must be programmed
with a value lower than the one in sl3.

Ac1

Action 1

Control action for OUTPUT 1:

Reverse: For heating or humidification;

Direct: For cooling or dehumidification;

Low (minimum value) alarm;

High (maximum value) alarm;

Low alarm with initial blocking;

High alarm with initial blocking.

Ac2

Action 2

Control OUTPUT 2 and OUTPUT 3 action:

Reverse control action (heating or humidification);

Direct control action (cooling or dehumidification);

Low (minimum value) alarm;

High (maximum value) alarm;

Low alarm with initial blocking;

High alarm with initial blocking;

Alarm inside the range;

Alarm outside the range;

Inside the range alarm with initial blocking;

Outside the range alarm with initial blocking;

Free Timer (available only for AC3).

The section Working With The Controller describes how these functions work.

Ac3

Action 3

(nt

Control

Defines the outputs positioning in relation to the variables.

OUTPUT 1 = RH; OUTPUT 2 = RH and OUTPUT 3 = RH

OUTPUT 1 = RH; OUTPUT 2 = RH and OUTPUT 3 = Temperature

OUTPUT 1 = RH; OUTPUT 2 = Temperature and OUTPUT 3 =RH

OUTPUT 1 = RH; OUTPUT 2 = Temperature and OUTPUT 3 =Temperature

OUTPUT 1 = Temperature; OUTPUT 2 = RH and OUTPUT 3 = RH

OUTPUT 1 = Temperature; OUTPUT 2 = RH and OUTPUT 3 = Temperature

OUTPUT 1 = Temperature; OUTPUT 2 = Temperature and OUTPUT 3 = RH

OUTPUT 1 = Temperature; OUTPUT 2 = Temperature and OUTPUT 3 =
Temperature

Ky1
Ky2
Ky3

Hysteresis

Control hysteresis: Differential between the point of switching on and off the relay of
the output, set up as a control output.
Adjustable between 0.1 and 50.0.

dli
dl2
dl3

Delay

Time of delay for starting the control. After the controller has been switched on, the

output (1, 2 or 3) will only be switched on when the time programmed in this
parameter has passed. Used in large refrigeration systems to impede simultaneous
routing of compressors upon recovery of power supply interruption.
Value in seconds, 0 to 250 s.

Of1
of2
of3

Off time

Defines the minimum off time for control OUTPUT. Once OUTPUT 1 is turned off, it

remains so for at least the time programmed in of1. This parameter is useful in

extending compressor life in refrigeration systems. For heating systems, program
of1

to zero.

Value in seconds, 0 to 999 s.

on1
on2
on3

on time

Defines the minimum on time for control OUTPUT 1. Once turned on, OUTPUT 1
remains so for at least the time programmed in on1. This parameter is intended for
refrigeration systems where increased compressor life is desired. For heating
systems, program on1 to zero. Value in seconds, 0 to 999 s.
Value in seconds, 0 to 999 s.

1t1
2t1

Timer T1

Time interval T1 for alarm temporization. Defines the temporization mode and
intervals, as shown in Table 1. Not available when outputs 1 and 2 are configured as
direct action. Adjustable from 0 to 1999 seconds.

3t1

Timer T1

Time interval T1 for temporization. Defines the temporization mode and intervals for
OUTPUT 3 (see Table 1). Not available when OUTPUT 3 is configured as direct
action. Adjustable from 0 to 1999 seconds. If AC3 is configured as Free Timer, the
unit of time is given in minutes.
Timer output activation duration (timer).

1t2
2t2

Timer T2

Time interval T2 for alarm temporization. Defines the temporization mode and
intervals, as shown in Table 1. Not available when outputs 1 and 2 are configured as
direct action. Adjustable from 0 to 1999 seconds.

3t2

Timer T2

Time interval T2 for temporization. Defines the temporization mode and intervals, as

shown in Table 1. Not available when OUTPUT 3 is configured as direct action.
Adjustable from 0 to 1999 seconds. If AC3 is configured as Free Timer, the unit of
time is given in minutes.
Interval between the timer output activation operations (timer).

Add

Address

The controllers with incorporated serial communication interface RS485 present the

parameter Add in their programming level. In this parameter, the user defines a
communication address for each network element. The defined address shall be
between 1 and 247.

Note 3: The correct use of the delays dL1 and dL2 contributes to a smooth start-up following a energy
fail; the compressors will be turned on in sequence, according to the programmed temporization, reducing
the energy demand after power-up.

Level 3 – Calibration Level
The controller is factory calibrated. The following parameters should be accessed only by experienced
personnel. To enter this cycle, the

key must be kept pressed for 3 seconds.

In case of accidental access, the keys

and

shall not be pressed; Just pass through all

parameters, till the controller goes back to the measuring screen.

pas

Password - Enter the correct password to unlock write operations on the parameters
in the following levels.

(rk

RH Calibration low. Offset calibration for RH.

(tp

T Calibration low. Offset calibration for Temperature.

Prt

Protection - Defines the levels of parameters that will be password protected.

Pa(

Password Change - Allows changing the current password to a new one. Values
from 1 to 999 are allowed.

Sn2

Shows the first two digits of the controller electronic serial number.

sn1

Shows the three central digits of the controller electronic serial number.

sn0

Shows the three last digits of the controller electronic serial number.

ERROR MESSAGES

The controller shows messages on the display that correspond to the problems related to the humidity
measurement. The control output relay is immediately switched off, when they are shown.

Indicates that: the measurement exceeded the upper level of the sensor range.
Possible sensor problem.

Indicates that: the measurement exceeded the lower level of the sensor range.
Possible sensor problem.

Sensor problem. Revise sensor wiring. If problem persists, contact the factory.

CONFIGURATION PROTECTION

A protection system to avoid unwanted changes to the controller parameters is implemented. The level of
protection can be selected from partial to full. The following parameters are part of the protection system:

Pas

When this parameter is presented, the correct password must be entered to allow changes of
parameters in the following levels.

Prt

Defines the level of parameters that will be password protected:
1 - Only calibration level is protected (factory configuration);
2 - Calibration and Configuration levels are protected;
3 - All levels are protected - calibration, configuration and setpoints.

PA(

Parameter for definition of a new password. Since it is located in the calibration level, can only be
changed by a user that knows the current password. Valid passwords are in the range 1 to 999.

CONFIGURATION PROTECTION USAGE

The PAS parameter is displayed before entering a protected level. If the correct password is entered,

parameters in all following levels can be changed. If wrong or no password is entered, parameters in the
following levels will be read only.
Important notes:
1- After five consecutive attempts to enter a wrong password, new tentative will be blocked for the next 10

minutes. If the current valid password is unknown, the master password can be used only to define a
new password for the controller.

2- The factory default password is 111.

MASTER PASSWORD

The master password allows user to define a new password for the controller, even if the current password is
unknown. The master password is based in the serial number of the controller, and calculated as following:

[ 1 ] + [higher digit of SN2 ] + [higher digit of SN1 ] + [higher digit of SN0 ]

For example the master password for the device with serial number 987123465 is: 1 9 3 6
As follows:

1 + sn2= 987;

sn1

= 123;

sn0

= 465 =

1 + 9 + 3 + 6

How to use the master password:
1- Enter the master password value at PaS prompt.
2- Go to PA( parameter and enter the new password, which must not be zero (0).
3- Now you can use this new password to access all controller parameters with modify rights.

WARRANTY

Warranty conditions are available on our web site