Novus N322 User manual

ELECTRONIC THERMOSTAT
N322
OPERATING MANUAL - V1.7x
The N322 is a 2-output di ital electronic thermostat for heatin and coolin
applications. It is available with NTC thermistor input sensor, Pt100, Pt1000 or
J/K/T type thermocouple. Sensor offset correction is provided. The 2 independent
outputs can be used as control or alarm. The features of a particular model (input
sensor type, sensor ran e, mains supply, etc) are identified by the label placed on
the thermostat body.
SPECIFICATIONS
INPUT SENSOR: The input sensor type can be chosen form the options below
(specified when placin the order):
NTC Thermistor, 10 kΩ
ΩΩ
Ω @ 25 °C; ran e: –50 to 120 °C (-58 to 248 °F);
Accuracy: 1,0 °C (1,1 °F), with ori inal sensor;
Sensor interchan eability: 1 °C (1.35 °F). This error can be compensated by
the offset parameter in the thermostat.
Pt100 (α
αα
α= 385); Ran e: –50 to 300 °C (-58 to 572 °F);
Accuracy: 0,7 °C (1.3 °F); IEC-751.
Pt1000 (α
αα
α= 385); Ran e: –200 to 530 °C (-328 to 986 °F); Accuracy: 0,7 °C (1.3° F);
J, K or T t ermocouple (IEC-584):
Type J: Ran e: 0 to 600 °C (32 to 1112 °F); Accuracy: 3 °C (5.4 °F);
Type K: Ran e: -50 to 1000 °C (-58 to 1832 °F); Accuracy: 3 °C (5.4 °F);
Type T: Ran e: -50 to 400 °C (-58 to 752 °F); Accuracy: 3 °C (5.4 °F);
Note: In the thermostat with NTC input, a 3 m-sensor cable is bundled with the
instrument. The cable can be extended up to 200 m.
WARM-UP:............................................................................................15 minutes
MEASUREMENT RESOLUTION:
from –19.9 to 199.9º With NTC, Pt100 and Pt1000:............................................0.1
elsewhere: .........................................................................................................1
OUTPUT1:........... Relay SPDT; 1 HP 250 Vac / 1/3 HP 125 Vac (10 A Resistive)
OUTPUT2:................................................................... Relay: 3A / 250 Vac, SPST
POWER SUPPLY: ..............100~240 Vac (± 10 %) or 24 Vdc/ac (12~30 Vdc/ac)
........................................ Mains frequency: 50~60 Hz. Power consumption: 5 VA
Caution: check the power supply specification before ener izin the thermostat.
DIMENSIONS:.......................................Width x Hei ht x Depth: 74 x 32 x 75 mm
..............................................................Panel cut-out: 70 x 29 mm; Wei ht: 100
ENVIRONMENT:......................Operatin temperature: 0 to 40 °C (32 to 122 °F)
....................................................Stora e temperature: -20 to 60 °C(-4 to 140 °F)
.......................................................Relative humidity: 20 to 85 % non condensin
CASE:............Polycarbonate UL94 V-2; Protection: Front panel: IP65, Box: IP42
................................................................................ Suitable wirin : Up to 4,0 mm²
RS-485 digital communication; RTU MODBUS protocol (optional)
ELECTRICAL WIRING
It is important to follow the recommendations below:
• Si nal wires should be installed in rounded conduits and away from power or
contactor wires.
• The instrument should have its own power supply wires that should not be
shared with electrical motors, coils, contactors, etc.
• Installin RC filters (47 R and 100 nF, series combination) is stron ly
recommended at contactor coils or any other inductors.
Fi ure 1 below shows the thermostat connections to sensor, mains and outputs.
Fi ure 1 – N322 terminals
Pt100 wit 3 conductors: Terminals 11, 12 and 13 must have the same wire
resistance for proper cable len th compensation. For 2 wire Pt100, short circuit
terminals 11 and 13.
OPERATION
The thermostat requires the internal parameters to be confi ured accordin to the
intended use for the instrument The parameters are or anized in 4 roups or
levels:
Level Function
0 Temperature measurement
1 Setpoint Adjustment
2 Confi uration
3 Calibration
Upon power-up, the N322 display shows for 1 second its firmware version. This
information is useful when consultin the factory.
Then, the temperature measured by the sensor is shown on the display. This is
the parameter level 0 (temperature measurement level).
To access level 1, press for 1 second until the “SP1
SP1SP1
SP1” messa e shows up.
Pressin a ain, the “SP2
SP2SP2
SP2” parameter is presented. To o back to level 0,
press once more.
To access level 2 of paramenters, press for 2 seconds until the “uNT
uNTuNT
uNT”
messa e is shown. Release the key to remain in this level. Each new
pressin on the key will advance to the next parameter in the level. At the end
of the level, the thermostat returns to the first level (0). Use the and keys
to alter a parameter value.
Notes: 1 A parameter confi uration is saved when the key is pressed to
advance to the next parameter in the cycle. The confi uration is
stored in a non-volatile memory, retainin its value when the
thermostat is de-ener ized.
2If no keyboard activity is detected for over 20 seconds, the thermostat
saves the current parameter value and returns to the measurement
level.
Level 1 –Setpoint Adjustment
In this level only the Setpoint (SP1
SP1 SP1
SP1 and SP2
SP2SP2
SP2) parameters are available,
alternatin the names with their respective values. Adjust the desired temperature
for each setpoint clickin on the and keys.
SP1
SP1SP1
SP1
Set Point 1
Temperature adjustment for control OUTPUT 1. SP1
SP1SP1
SP1 value is
limited to the values pro rammed in SPL
SPLSPL
SPL and SPk
SPk SPk
SPk in the
pro rammin level (Parameter confi uration, level 2).
SP2
SP2SP2
SP2
Set Point 2
Temperature adjustment for control OUTPUT 1. SP2
SP2SP2
SP2 value is
limited to the values pro rammed in SPL
SPLSPL
SPL and SPk
SPk SPk
SPk
Level 2 – Configuration - Parameters configuration Level
Contains the confi uration parameters to be defined by the user, accordin to the
system’s requirements. Use and keys to set the value. The display
alternates the parameter name and respective value.
Unt
UntUnt
Unt Temperature Unit - Selects display indication for de rees
Celsius or Fahrenheit.
0
00
0 - Temperatura em raus Celsius
1
11
1 - Temperatura em raus Fahrenheit
typ
typtyp
typ Input Type - Selects the input sensor type to be connected to the
controller. Available only for thermocouple models, allowin
selection of types J, K and T.
0
00
0 - Thermocouple type J
1
11
1 - Thermocouple type K
2
22
2 - Thermocouple type T
ofs
ofsofs
ofs
Sensor Offset - Offset value to be added to the measured
temperature to compensate sensor error.
spl
splspl
spl
SP Low Limit - Lower ran e for SP1
SP1 SP1
SP1 and SP2
SP2SP2
SP2. SPL
SPL SPL
SPL must be
pro rammed with a lower value than spK
spKspK
spK.
spK
spKspK
spK
SP Hig Limit - Upper ran e for SP1
SP1 SP1
SP1 and SP2
SP2SP2
SP2. SPx
SPx SPx
SPx must be
reater than spl
splspl
spl.
ky1
ky1ky1
ky1
OUTPUT 1 Hysteresis: defines the differential ran e between
the temperature value at which the OUTPUT 1 is turned on and
the value at which it is turned off. In de rees.
ky2
ky2ky2
ky2
OUTPUT 2 Hysteresis: defines the differential ran e between
the temperature value at which the OUTPUT 2 is turned on and
the value at which it is turned off. In de rees.
Ac1
Ac1Ac1
Ac1
Control action for OUTPUT 1 :
0
00
0 Reverse: For heatin applications. Outputs turn on when
temperature is lower than SP.
1
11
1 Direct: For coolin applications. Output turns on when
temperature is above SP.
Ac2
Ac2Ac2
Ac2
Action 2 - Control OUTPUT 2 action or Alarm funtions:
0
00
0 Reverse control action (heatin ).
1
11
1Direct control action (coolin ).
2
22
2Low (minimum) temperature alarm.
3
33
3Hi h (maximum) temperature alarm.
4
44
4Alarm for temperature inside the ran e
5
55
5Alarm for temperature outside the ran e.
6
66
6Low temperature alarm with initial blockin .
7
77
7Hi h temperature alarm with initial blockin .
8
88
8Inside ran e alarm with initial blockin .
9
99
9Outside ran e alarm with initial blockin .
The section Working wit t e T ermostat describes how these
functions work.
nt
ntnt
nt
Control
Control - Associates Setpoints and Outputs.
0
00
0 Setpoint 1 is assi ned to OUTPUT1 and Setpoint 2 to
OUTPUT2 (factory settin ).
1
11
1 Setpoint 1 is assi ned to OUTPUT2 where as Setpoint 2 is
directed to OUTPUT1.

of1
of1of1
of1
Off time 1
Off time 1 - Defines the minimum off time for control OUTPUT 1.
Once OUTPUT 1 is turned off, it remains so for at least the time
pro rammed in of1
of1of1
of1. For thermocouple inputs this parameter is
not available. This parameter is intended for refri eration systems
where lon er compressor life is desired. For heatin systems,
pro ram of1
of1 of1
of1 to zero. Value in seconds, 0 to 999 s.
on1
on1on1
on1
on time 1
On time 1 - Defines the minimum on time for control OUTPUT 1.
Once turned on, OUTPUT 1 remains so for at least the time
pro rammed in on1
on1on1
on1. For thermocouple inputs this parameter is
not available. This parameter is intended for refri eration systems
where increased compressor life is desired. For heatin systems,
pro ram on1
on1 on1
on1 to zero. Value in seconds, 0 to 999 s.
dl1
dl1dl1
dl1
Delay 1
Delay 1 - Delay time to start control. Upon power-on, control
OUTPUT 1 is kept off until the time pro rammed in dl1
dl1dl1
dl1 is elapsed.
Its usa e is intended to prevent multiple compressors to start
simultaneouly after the turn-on of a system with several
thermostats. Value in seconds, 0 to 250 s.
of
ofof
of2
22
2
Off time 2
Off time 2 - Defines the minimum off time for control OUTPUT 2.
Once OUTPUT 2 is turned off, it remains so for at least the time
pro rammed in of2
of2of2
of2. For thermocouple inputs this parameter is
not available. This parameter is intended for refri eration systems
where increased compressor life is desired. For heatin systems,
pro ram on2
on2 on2
on2 to zero. Value in seconds, 0 to 999 s.
on2
on2on2
on2
on time 2
On time 2 - Defines the minimum on time for control OUTPUT 2.
Once turned on, OUTPUT 2 remains so for at least the time
pro rammed in on2
on2on2
on2. For thermocouple inputs this parameter is
not available. This parameter is intended for refri eration systems
where increased compressor life is desired. Value in seconds, 0
to 999 s. For heatin systems, pro ram of2
of2 of2
of2 to zero.
dl2
dl2dl2
dl2
Delay 2
Delay 2 - Delay time for OUTPUT 2 to turn on relative to
OUTPUT 1. This parameter defines a particular workin mode,
typically used in multiple sta e systems, where OUTPUT 2 is
allowed to o on only if OUTPUT 1 is already on for at least dL2
dL2dL2
dL2
seconds. Also, OUTPUT 2 is driven off whenever OUTPUT 1 oes
off. dL2
dL2dL2
dL2= 0
0 0
0 disables this function. Value in seconds, 0 to 250 s.
Addr
AddrAddr
Addr
Address
Adress - Thermostats with the optional RS485 Modbus RTU
communication interface have the Addr
AddrAddr
Addr parameter at the
Confi uration level. Set a unique Modbus address for each
equipment connected to the network. Address ran e is from 1 to
247.
Level 3 – Calibration level
The thermostat is factory calibrated. The followin parameters should be
accessed only by experienced personnel. To enter this cycle, the key must be
kept pressed for 4 seconds.
Don’t press t e and keys if you are not sure of t e calibration
procedures. Just press t e key a few times until t e temperature
measurement level is reac ed again.
pas
paspas
pas Password - Enter the correct password to unlock write
operations for the parameters in the followin levels.
[Al
[Al[Al
[Al Calibration low - Offset value of the input. It adjusts the lower
measurement ran e of the sensor.
[Ak
[Ak[Ak
[Ak
Calibration Hig - Gain calibration. It adjusts the upper
measurement ran e of the sensor.
[JL
[JL[JL
[JL
Cold Junction Offset calibration - This parameter is available
only for thermocouple.
FA
FAFA
FA Factory Calibration - Restores factory calibration
parameters. Chan e from 0 to 1 to restore the calibration
parameters with factory values.
Prt
PrtPrt
Prt Protection - Defines the levels of parameters that will be
password protected. See "Confi uration Protection" for details.
Pa
PaPa
Pa Password C ange - Allows chan in the current password to a
new one. Values from 1 to 999 are allowed.
Sn2
Sn2Sn2
Sn2 Serial number - First part of the thermostat electronic serial
number.
sn1
sn1sn1
sn1 Serial number - Second part of the thermostat electronic serial
number.
sn0
sn0sn0
sn0 Serial number - Third part of the thermostat electronic serial
number.
WORKING WITH THE THERMOSTAT
Multiple output thermostats are suited for controllin multiple sta e systems.
Other applications require OUTPUT 1 to be the control output and OUTPUT 2 to
be the alarm.
There are ei ht distinct alarm functions implemented in OUTPUT 2, selected by
the parameter Ac2
Ac2Ac2
Ac2, described below:
2
22
2 - Low temperature alarm – OUTPUT 2 is turned on when the measured
temperature falls below the SP2
SP2 SP2
SP2 value.
3
33
3 - Hi h temperature alarm – OUTPUT 2 is turned on when the measured
temperature exceeds the value pro rammed in SP2
SP2SP2
SP2.
4
44
4 - Inside ran e alarm – OUTPUT 2 is turned on when the measured
temperature is within the ran e defined by:
(SP1
SP1SP1
SP1 – SP2
SP2 SP2
SP2) and (SP1
SP1SP1
SP1 + SP2
SP2 SP2
SP2)
5
55
5 - Outside ran e alarm: OUTPUT 2 is turned on when the temperature
falls outside the ran e defined by:
(SP1
SP1SP1
SP1 – SP2
SP2 SP2
SP2) and (SP1
SP1SP1
SP1 + SP2
SP2 SP2
SP2)
Functions 6
66
6, 7
77
7, 8
88
8 e 9
99
9 are identical to the above ones except that they incorporate
the Initial Blockin feature, which inhibits the output if an alarm condition is
present at start-up. The alarm will be unblocked after the process reaches a non-
alarm condition for the first time.
In a multiple sta e application, SP1
SP1SP1
SP1 and SP2
SP2SP2
SP2 are confi ured to operate at
different temperatures, creatin a pro ressive sequence for turnin on the outputs
(compressors) in response to a system demand. The output delays for turnin on
the compressors (dL1
dL1dL1
dL1 and dL2
dL2 dL2
dL2) cause the compressors to be turned on one by
one, minimizin ener y demand.
Another usa e for multiple output thermostats is in systems that require automatic
selection between cool and heat action. In these applications, one output is
confi ured as reverse action (heatin ) and the other as direct action
(refri eration). The output status led P1 and P2 in the thermostat panel, si nals
when the control output in on.
CONFIGURATION PROTECTION
A protection system to avoid unwanted chan es to the thermostat parameters
is implemented. The level of protection can be selected from partial to full. The
followin parameters are part of the protection system:
Pas
PasPas
Pas When this parameter is presented, the correct password should be entered
to allow chan es of parameters in the followin levels.
Prt
PrtPrt
Prt Defines the level of parameters that will be password protected:
1 - Only calibration level is protected (factory confi uration);
2 - Calibration and Confi uration levels are protected;
3 - All levels are protected - calibration, Confi uration and setpoints.
PA
PAPA
PA Parameter for definition of a new password. Since it is located in the
calibration level, can only be chan ed by a user that knows the current
password. Valid passwords are in the ran e 1 to 999.
CONFIGURATION PROTECTION USAGE
PAS
PASPAS
PAS parameter is displayed before enterin a protected level. If the correct
password is entered, parameters in all followin levels can be chan ed. If wron
or no password is entered, parameters in the followin levels will be read only.
Important notes:
1- After five consecutive attempts to enter a wron 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
thermostat.
2 - The password for a brand new device is 111.
MASTER PASSWORD
The master password allows user to define a new password for the thermostat,
even if the current password is unknown. The master password is based in the
serial number of the thermostat, and calculated as followin :
[ 1 ] + [ hi her di it of SN2 ] + [ hi her di it of SN1 ] + [ hi her di it of SN0 ]
for example the master password for the device with serial number 987123465 is:
1 9 3 6
as follows: 1 + sn2
sn2sn2
sn2= 987; sn1
sn1sn1
sn1= 123; sn0
sn0sn0
sn0= 465 = 1 + 9 + 3 + 6
How to use t e master password:
1- Enter the master password value at PaS
PaSPaS
PaSprompt.
2- Go to PA
PAPA
PA parameter and enter the new password, which must not be zero (0).
3- Now you can use this new password to access all thermostat parameters
with modify ri hts.
ERROR MESSAGES
Sensor measurement errors force the thermostat outputs to be turned off. The
cause for these errors may have ori in in a bad connection, sensor defect (cable
or element) or system temperature outside the sensor workin ran e. The display
si ns related to measurement errors are shown below:
Measured temperature exceeded maximum allowed ran e for
the sensor. Broken Pt100, Pt1000 or T/C. Short circuited NTC
sensor.
Measured temperature is below minimum measurement ran e of
the sensor. Short circuited Pt100, Pt1000 or T/C. Broken NTC.
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