meitav-tec PYROCON19 User manual

PYROCON19
Controller and User Interface panel
Owner’s manual & Technician Settings
Rev.5.2.9

Index
Introduction…………………………………………………………………...……. 3
Wiring diagram …………………………………...……………………………….. 4
Connecting snow sensors to the system……………………………………...5
Operating instructions…………………………………………………………….6
Turning the system ON and OFF………………………………………………. 6
Selecting temperature scale……………………………………………………..6
Selecting Automatic or Manual mode …………………………………………. 6
Heaters indication………………………………………………………………... 6
Snow flake icon and digital time indication……………………………………. 6
Technician settings……………………………………………………………….. 7
Enter technician settings mode…………………………………………...……. 7
P01 - Temperature set point……………………………………………………. 7
P02 - Lower limit temperature for heating …………………………………….. 8
P03 - Upper limit temperature for heating …………………………………….. 8
P04 -Time delay before stopping the heaters………………………………….9
P05 - Manual mode ON time……………………………………………………. 9
P06 – Heaters cycle and splitting time………………………………………….9
P07 - Heater outputs logic (by PYROSENSE or by 3rd party sensor)…..…. 10
P08 - Snow sensor sensitivity ……………………………………………..…… 11
P88 - Snow detection threshold………………………………………………… 11
P09 - Number of snow sensors connected……………….……………….….. 12
P10 - Test conditions mode…………………………………………………….. 13
P11 - Master/Slave ……………………………………………………………… 13
P12 - Controller’s MAC Address for BMS …………………………………….. 13
P13 - Not in use …………………………………………………………………. 14
P14 - Reset PYRO sensors MAC Address …………………………………… 14
P15 – Offset for calibration of measured temperature ………………………. 14
Save changes end return to normal display………….………………...….…. 14
Restore default values……………………………………………………………. 14
DIP Switch settings……………………………………………………………….. 15
DIP switch S2 - Short measuring times (test only) …………………………... 15
DIP switches S3 and S4 – heaters sequencing logic………………………... 15
Enable/Disable zones……...……………………………………………………... 16
Select Critical zones ……...…………………………………………………….... 17
Temperature reading errors……………………………………………………... 18
Ambient temperature sensor readings out of range………………………….. 18
Communication error with one or more snow sensors………………………..18
Upper limit temperature sensor is not connected or short circuit …………... 18
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Owner’s manual & Technician Settings
Pg. 2

Introduction
The PYROCON19 offers smart and easy control over the PYRO Snow & Ice Melting system.
It can operate up to 4 snow melting zones and one auxiliary zone, with selectable sequencing method.
Typical applications include driveways, sidewalks, loading docks, stairs, pavements and gutters.
The backlit LCD screen provides full interface and information to the system status.
The Use of several zones staggering allow covering larger area for snow melting with less available
electrical power.
The PYROCON19 offers various operating and programming options such as:
- Switchable temperature scales (°F or °C) - Adjustable Lower ambient temperature limit to stop
- Both Automatic and Manual modes heaters (lockout)
- Adjustable heaters cycle and splitting times - Energy saving temperature limit
- Adjustable heaters hold on off delay - Adjustable snow sensor sensitivity
- Optional auxiliary control based 3rd party - Commissioning/Test environment
snow sensor (e.g. Gutter/Pavement sensor) - Master/Slave connections
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Owner’s manual & Technician Settings
Pg. 3
Optional 3rd party sensor
(e.g. Gutter/Pavement sensor)
Optional PYROSENSE
(Up to 4 Aerial sensors)
(Do not run communication cables close
to heaters or high voltage wires)
Zone
1
General system layout
Zone
5
Zone
2
Zone
3
Zone
4
Auxiliary control
(e.g. Gutter or
Pavement
heaters)
Optional PYROSENSE-GUTTER
(up to 2 Gutter sensors)
Optional T2 –
Outdoor temperature sensor
BMS (Bacnet/Modbus)
or WiFi module
Optional PYROSENSE-GROUND
(Up to 2 Ground sensors)
PYRO-JBOX
ON
PYROCON19 Optional PYROULS –
Upper limit sensor
Contactors

PYROCON19
Owner’s manual & Technician Settings
Pg. 4
Wiring diagram - with optional components and connections
1 2 Z5 22
421
PYROULS
Upper limit
Sensor
PYROCON19
R
C
Z1
Z2
Z3
Z4
A
B
3
To
Contactors
5
T3 T2 B2 A2
3rd party
sensor
or dry
contact switch
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Up to 4
PYROSENSE
Aerial sensors
A
B
R
C
A
B
R
C
A
B
R
C
A
B
R
C
110
110
Up to 2 Gutter
sensors
Up to 2 Ground
sensors
A
B
R
C
A
B
R
C
A
B
R
C
A
B
R
C
110
110
Up to 3
PYROCON19
(slaves)
Outdoor sensor (option)
Should be used when only
PYROSENSE-GROUND
is connected
24VAC
C
External
transformer
120/24VAC,
25VA
Supply
120VAC
ULTESS T2
~
N
110VAC
BMS (BACnet/Modbus)
or WiFi Module
Z5Z4Z3Z2Z1
Optional devices connected to
A,B through PYRO-JBOX
(See P09 for instructions on
how to connect sensots)
EGFPD
CCC
PYRO
JBOX
PYRO
JBOX
Important!
The PYROCON19 does
not include an integral
EGFPD (Equipment
Ground Fault Protection
Device).
EGFPD needs to be
provided in the end
application.
AB N~
AB N~
22R
R
A2
B2

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Owner’s manual & Technician Settings
Pg. 5
Connecting communicating sensors and PYROCON19 slaves
These devices/sensors can be connected directly to A,B terminals on the
PYROCON19 or through multiple PYRO-JBOX junction boxes with built
in 50VA, 110~24VAC transformer - Allowing connection and powering up
to 3 sensors.
Device/Sensor
type
PYROSENSE
Aerial sensor
Gutter sensor
Ground sensors
Number of
sensors/devices
Up to 4
Up to 2
Up to 2
Power
consumption
(24VAC)
4VA
4VA
15.6VA
Power/Comm.
cable length
32.8ft / 10m
32.8ft / 10m
32.8ft / 10m
MAC
Address
1-4
7-8
5-6
PYROCON19
(slaves) Up to 3 x x 14-16
A
B
PYROCON19
Master
PYRO-JBOX
R C A B R C A B R C A B R C A B
110V 110V
Internal transformer
110~24VAC,50VA
Supply
110VAC
White Blue Red Black White Blue Red Black White Blue Red Black
PYROCON19
Slave #3
(A2,B2)
or Sensor #3
Note: Use multiple PYRO-JBOXes
to connect up to 6 sensors and 3
PYROCON19 slaves
PYROCON19
Slave #2
(A2,B2)
or Sensor #2
PYROCON19
Slave #1
(A2,B2)
or Sensor #1
The PYROSENSE aerial sensors are supplied with:
1. A plastic cap, to protect the sensor from dust and debris for when the sensor
is not in use (off season).
Important! The protective cap must be removed before use of the sensor.
If the protective cap is not removed, the sensor will not detect snow!
2. Plastic spikes, to be used if necessary, to keep birds off the sensor.

Operating instructions
Turning the system ON and OFF
Press the [SELECT] button to switch between modes:
“Automatic” Heating will start and stop automatically depending on snow
detection by the snow sensor/sensors.
“Manual ON” Heating will start regardless of snow sensor measurements and will
stop after a preset time (pls. refer to the “Manual ON” section in the
technician settings P05).
Note: Mode will always return to “Automatic” after switching the unit OFF and ON.
Press and hold the [ON] button for 0.5 seconds to turn the system ON or OFF.
The words “ON” or “OFF” will appear on display.
Selecting Automatic or Manual mode
Selecting temperature scale
Press the [+] button for Celsius.
Press the [-] button for Fahrenheit.
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Owner’s manual & Technician Settings
Pg. 6
Heaters indication
Heater ON Heater OFF
The number beneath the heater icon
indicates the heater outputs (1 to 5).
Heater
1
Heater
2
Heater
3
Heater
4
Heater
5
Black icon – Heater ON
White icon – Heater OFF
A solid snow flake icon will appear on display while sensing snow and during normal
heaters operation.
Snow flake icon and digital time indication
A blinking snow flake icon will appear on display during heaters off delay or when manual mode is
activated. The digital clock will count down the remaining time until the heaters are turned off.
The snow flake icon will disappear from display as long as the heaters are turned off.
Heater ON in off delay time
(see technician parameter P04)

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PYROCON19
Owner’s manual & Technician Settings
Pg. 7
Technician settings
P01 Temperature set point
P02 Lower ambient temperature limit to stop heaters
P03 Energy saving, upper slab temperature limit to stop heaters
P04 Time delay before stopping the heaters
P05 ON time for manual mode
P06 Heaters cycle time / Splitting time
P07 Sensors and heaters control logic
P08 Snow sensor sensitivity
P88 Snow detection threshold
P09 Number of snow sensors connected
P10 Commissioning / Test mode
P11 Master/Slave
P12 Controller’s MAC Address for BMS
P13 Not in use
P14 Reset PYRO sensors MAC Address
P15 Offset for calibration of measured temperature
Restore defaults
Move DIP switch S1 located on the side of thermostat to ON position.
Press the [SELECT] and [+] buttons simultaneously to move forward to the
next technician parameter.
Press the [SELECT] and [-] buttons simultaneously to return to the previous
technician parameter.
Enter technician settings mode
Enter technician
settings mode
Important: Changes made to technician parameters will not take effect
as long as DIP switch S1 is in ON position. Save changes
and exit
technician
settings mode
Save changes and exit technician settings mode
Move DIP switch S1 located on the side of thermostat to OFF position.
Cont’
Use the technician settings to view and adjust the following parameters:

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PYROCON19
Owner’s manual & Technician Settings
Pg. 8
P01 - Temperature set point
Move DIP switch S1 located on the side of thermostat to ON position to enter
technician settings mode.
“P01” and the temperature set point will appear on display.
Use the [+] and [-] buttons to adjust the temperature set point.
Range: 14…59°F / -10…+15°C, default 37°F / +3°C
As long as the ambient temperature is lower than the temperature set point P01,
the heaters will turn ON upon receiving a positive snow signal from the snow
detector.
Temperature
set point
Technician settings
Ambient
temperature
sensor
Snow
detector
Snow
detector
Ambient
temperature
sensor
PYROSENSE-GUTTER PYROSENSE
Cont’
The controller will read the ambient temperature from the connected sensors in
the following priority:
1. PYROSENSE – aerial sensor.
2. PYRO-GUTTER gutter sensor.
3. T2 sensor – When no aerial or gutter sensors are used.

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Owner’s manual & Technician Settings
Pg. 9
Cont’
Technician settings (Cont’)
temperature
on heaters
sensor
P03 – Upper limit temperature for heating
Press the [SELECT] and [+] buttons simultaneously.
“P03” and the slab upper limit temperature will appear on display.
Use the [+] and [-] buttons to adjust the upper limit temperature.
Range: +41…+122°F / +5…+50°C Default: 86°F / +30°C
*For numbers above 100, “100” will appear on display.
Press the [SELECT] and [+] buttons simultaneously again.
The word “ON” or “OFF” will appear on display.
Use the [+] and [-] buttons enable (ON) or disable (OFF) the P03
parameter.
If disabled, the heaters will work regardless of the upper limit.
Press the [SELECT] and [+] buttons simultaneously again.
The display will show the temperature on the upper limit sensor.
Upper limit
temperature
Set point
enabled
P03
disabled
P02 - Lower limit temperature for heating
Press the [SELECT] and [+] buttons simultaneously.
“P02” and the low limit temperature will appear on display.
When the temperature on the temperature sensor drops below the low
temperature limit, the heating system will stop.
Use the [+] and [-] buttons to adjust the temperature set point.
Range: -40…+23°F / -40…0°C Default: -31°F / -350°C
Press the [SELECT] and [+] buttons simultaneously again.
The word “ON” or “OFF” will appear on display.
Use the [+] and [-] buttons enable (ON) or disable (OFF) the P02
parameter.
If disabled, the heating system will operate without low temperature
limitations.
Low limit
Temperature
P02
enabled
P02
disabled

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Owner’s manual & Technician Settings
Pg. 10
Technician settings (Cont’)
P05 - Manual mode ON time
Press the [SELECT] and [+] buttons simultaneously.
“P05”, “On” and the “Manual ON” mode time period will appear on display.
The hours will blink.
The delay time parameter defines a time frame in which the heaters remain
ON after receiving an “Manual ON” command.
Use the [+] and [-] buttons to adjust the hours of the working time.
Range: 00...48 hours Default: 6 hours
Press the [SELECT] and [+] buttons simultaneously again.
The minutes will blink.
Use the [+] and [-] buttons to adjust the minutes of the working time.
Range: 00...59 minutes Default: 00 minutes
Manual ON
hours
Manual ON
minutes
Cont’
P04 -Time delay before stopping the heaters
Press the [SELECT] and [+] buttons simultaneously.
“P04”, “dL” and the time delay before stopping the heaters (Hold ON) will
appear on display. The hours will blink.
Use the [+] and [-] buttons to adjust the hours of the time delay.
Range: 0...9 hours Default: 1 hours
Press the [SELECT] and [+] buttons simultaneously again.
The minutes will blink.
Use the [+] and [-] buttons to adjust the minutes of the time delay.
Range: 00...59 minutes Default: 30 minutes
Note 1. The time delay countdown will start when the snow detection signal
from snow sensor controlling the specific heater will switch from
positive to negative.
Note 2. The staggering sequence will continue during the time delay period.
Note 3. The heater icon will blink when the heater is in off delay time.
Time delay
hours
Time delay
minutes

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Owner’s manual & Technician Settings
Pg. 11
Technician settings (Cont’)
P06 – Heaters cycle and splitting time
Press the [SELECT] and [+] buttons simultaneously.
“P06”, “SP” and the splitting time will appear on display.
The minutes will blink.
The heaters cycle / splitting time parameter defines the working time of the
heaters when working in sequence.
Example: the splitting time is set to 120 minutes and 4 heaters work in
sequence, each heater will be ON for 30 minutes (120/4=30).
Use the [+] and [-] buttons to adjust the splitting time.
Range: 1...600 minutes Default: 120 minutes.
Splitting time
Cont’

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Owner’s manual & Technician Settings
Pg. 12
Cont’
Technician settings (Cont’)
Value Heaters controlled by
PYROSENSE / PYROSENSE-GROUND
Heaters controlled by
PYROSENSE-GUTTER
(when connected)
3Snow on any sensor will trigger all heaters
Heaters 1,2
by PYROSENSE Heaters 3,4,5*
-
-
Heater 5
Heaters controlled by
3rd Party sensor
-
Heaters 1,2,3,4
Heaters 1,2,3,4 Heater 5 -
0
Heaters 1,2,3,4,5* - -
1Heaters 1,2,3,4 Heater 5-
-
2
-Heaters 1,2,3,4,5
4Heaters 1,2
by PYROSENSE Heaters 3,4 Heater 5 -
P07 - Heaters outputs logic controlled by PYRO sensors or by 3rd party sensor
Press the [SELECT] and [+] buttons simultaneously.
“P07” and the figures “0”, “1”, “2” or “3” will appear on display.
Use the [+] and [-] buttons to define the heaters logic (model dependent) as follows:
The snow sensors will control heaters upon the following logic:
1 Sensor 2 Sensors 3 Sensors 4 Sensors
Heaters 1,2,3,4 Sensor 1 – Heaters 1,2
Sensor 2 – Heaters 3,4
Sensor 1 – Heater 1
Sensor 2 – Heater 2
Sensor 3 – Heaters 3,4
Sensor 1 – Heater 1
Sensor 2 – Heater 2
Sensor 3 – Heater 3
Sensor 4 – Heater 4
Note: Sensors order (1,2,3,4) is defined by their MAC address order.
example: 3 sensors connected:
1 x PYROSENSE (MAC 1 – Sensor 1) - Will control heater 1
1 x PYROSENSE (MAC 2 – Sensor 2) - Will control heater 2
1 x PYROSENSE-GROUND (MAC 5 – Sensor 3) - will control heaters 3,4
*Heaters 4 and 5 will turn ON and OFF together.

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Owner’s manual & Technician Settings
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P08 - Snow sensor sensitivity
Press the [SELECT] and [+] buttons simultaneously.
“P08” and the snow sensor sensitivity value will appear on display.
Use the [+] and [-] buttons to adjust the sensitivity.
Range: 20...80 % (20% - Less sensitive, 80% - more sensitive), Default: 50 %
Snow sensor
sensitivity
P88 - Snow detection threshold
Press the [SELECT] and [+] buttons simultaneously.
“P88” and the snow sensor threshold will appear on display.
Use the [+] and [-] buttons to adjust the threshold.
Range: 0...60 minutes Default: 1 minutes
If the threshold is not reached, the logic of turning the heaters either ON or OFF will
not be affected by snow detection.
During countdown to threshold time, the snow flake icon will flash.
Snow detection
threshold
Technician settings (Cont’)
Cont’

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Owner’s manual & Technician Settings
Pg. 14
Technician settings (Cont’)
P09 – PYROSENSE sensors connected to system
Press the [SELECT] and [+] buttons simultaneously.
“P09” and the MAC address of the first sensor will appear on display.
Use the [+] and [-] buttons to select sensor. When selected, Press the
[ON] button to enable (ON) or disable (OFF) the sensor.
Repeat the operation for other sensors (1-8) – default: 1-ON, 2-8 OFF.
Sensors MAC Address:
- MAC 1 - PYROSENSE #1 (1st aerial sensor)
- MAC 2 - PYROSENSE #2 (2nd aerial sensor)
- MAC 3 - PYROSENSE #3 (3rd aerial sensor)
- MAC 4 - PYROSENSE #4 (4th aerial sensor)
- MAC 5 - PYRO-GROUND #1 (1st ground sensor)
- MAC 6 - PYRO-GROUND #2 (2nd ground sensor)
- MAC 7 - PYRO-GUTTER #1 (1st gutter sensor)
- MAC 8 - PYRO-GUTTER #2 (2nd gutter sensor)
After enabling required sensors, an error message “SensErr” and the
number of the first missing sensor will appear on display indicating that
this sensor is not connected to the system.
Connect the first sensor to the system and wait for the error message to
disappear or change to the next missing sensor.
Connect the second sensor to the system and repeat the operation.
Repeat the operation for all sensors in the system.
Sensor
enabled
Sensor
disabled
Connecting sensors to the system
Enable or disable
sensors using
technician parameter
P09.
The system will start
looking for the
sensors.
An error messege
“SnsErr” and the
number of the first
missing sensor will
appear on display.
Connect the first
sensor to the system
and wait until it is
recognized,
The error will
disappear or change
to indicate the next
missing sensor.
Connect the other
sensors to the
system one by one
until the error
disappears.
Cont’
Communication
error with snow
sensors

Technician settings (Cont’)
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Owner’s manual & Technician Settings
Pg. 15
P10 - Test conditions mode / Technician commissioning mode
Turn ON test conditions to check the functionality of the system regardless of
sensors parameters (i.e. during the summer).
In test conditions, the Ambient temperature is always -5°C/23°F.
Note: In order to trigger the system and activate the heaters, use some water to
wet the circuit on top of the snow sensor.
Press the [SELECT] and [+] buttons simultaneously.
“P10” will appear on display. The hours will blink.
Use the [+] button to enter test/commissioning mode – the word “Test” will
appear on display.
Use the [-] button to manually exit test/commissioning mode – the word
“Test” will disappear from display.
Note: If the technician did not manually exit test/commissioning mode, the unit
will automatically return to normal mode after 5 hours.
Test
conditions
mode
Cont’

Technician settings (Cont’)
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Owner’s manual & Technician Settings
Pg. 16
P11 – Master/Slave
Press the [SELECT] and [+] buttons simultaneously.
“P11” will appear on display.
Use the [+] and [-] buttons to select between:
-“ΠA” - Master (When using one PYROCON19 or when controlling other
PYROCON19 devices connected to A,B as slaves) - default
- “SL” - Slave (controlled by another PYROCON19 connected to A2,B2) SlaveMaster
P12 – Controller’s MAC Address
Press the [SELECT] and [+] buttons simultaneously.
“P12” will appear on display.
Use the [+] and [-] buttons to set the controller’s MAC address:
- For controller set by P11 as Master –
Address range for BMS 1...63, default 9
- For controller set by P11 as Slave –
Address range 14...16, default 14
Cont’
PYROCON19
MASTER
MAC Address
for BMS 1...63
Default 9
A2 B2
A B
PYRO-JBOXA BR C A BR C A BR C A BR C
PYROCON19
SLAVE #1
MAC Address
14
A2 B2
A B
PYROCON19
SLAVE #2
MAC Address
15
PYROCON19
SLAVE #3
MAC Address
16
BMS or WiFi Module
MAC Address
(Slave)
MAC Address
(Master)
110 110
(Up to 3 PYROCON19 slaves)
A2 B2
A B
A2 B2
A B

Technician settings (Cont’)
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Owner’s manual & Technician Settings
Pg. 17
P13 – Not in use
P14 – Reset PYRO Sensors MAC Address
Press the [SELECT] and [+] buttons simultaneously.
“P14” will appear on display.
Use the [+] and [-] buttons to select sensor by its MAC address.
Press the [ON] button to reset the sensor’s MAC address.
Press the [SELECT] and [+] buttons simultaneously.
“P13” will appear on display - Continue to P14
P15 – Offset for calibration of measures temperature
Press the [SELECT] and [+] buttons simultaneously.
“P15” will appear on display.
Use the [+] and [-] buttons to adjust the offset.
Range: -9…+9°F / -6…+6°C Default: 0°F / 0°C
In order to save changes and return to normal display, move DIP switch S1
back to OFF position.
Restore default values
Important: Make sure the unit is turned OFF (the word “OFF” should appear on display).
Move DIP switch S1 to ON position.
Press and hold the [ON] button for 10 seconds. The thermostat will beep.
Move DIP switch S1 back to OFF position.
Save changes and return to normal display
Important: Changes made to technician parameters will not take effect as
long as DIP switch S1 is in ON position.

Technician settings (Cont’)
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Owner’s manual & Technician Settings
Pg. 18
Use DIP switch S2 to short the
- “ON” - Short measuring times – for test/commissioning only (measuring times will be divided to 60).
- “OFF” - Normal operation.
Short measuring times: A real 1 hour will take 1 minute and a real 1 minute will take 1 second.
DIP switch S2 - Short measuring times (test only)
DIP switches S3 and S4 – heaters sequencing logic
Use DIP switches S3 and S4 to define the sequencing logic of the heater (zones) as follows:
S3 OFF, S4 OFF
All 4 outputs work per request from the snow sensor(s)
S3 OFF, S4 ON
Outputs 1+3 and outputs 2+4 work together (according to splitting time)
Note: Do not use this configuration with more than two snow sensors connected.
S3 ON, S4 OFF
Outputs 1,2 and 3 work in sequence (according to splitting time) and output 4
works continuously.
Note: Do not use this configuration with more than two snow sensors connected.
S3 ON, S4 ON
All 4 outputs work in sequence (according to splitting time)
Note: Do not use this configuration with more than two snow sensors connected.
Note: if output 5 is set to work together with outputs 1-4, (see “Heater output no. 5 logic” in the technician
settings), it will operate the same as output 4.

Technician settings (Cont’)
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Owner’s manual & Technician Settings
Pg. 19
Follow the steps below to enable or disable each of the 5 zones.
By default, all zones are enabled.
1. Turn the thermostat OFF.
2. Press and hold both the [+] and the [-] buttons simultaneously for 10 seconds.
3. Choose the required zone using the [Select] button. Selected zone number will appear on display
and the heater icon will flash.
4. Use the [+] button to enable the selected zone (black heater icon).
5. Use the [-] button to disable the selected zone (white heater icon).
6. Repeat steps above 3 to 5 for any required zone.
7. Press and hold both the [+] and the [-] buttons simultaneously again for 5 seconds to return to
normal display.
Note: Disabled zones will be ignored in splitting time calculations:
Example: the splitting time is set to 60 minutes and heaters are set work in sequence.
3 Heaters enabled and 1 heater disabled.
With all heaters enabled: Each heater will be ON for 15 minutes (60/4=15).
With 3 heaters enabled and 1 heater disabled: Each heater will be ON for 20 minutes (60/3=20).
Enable/Disable zones
[+] & [-]
(10 sec.) [Select] [Select] [Select]
54321
[-] [+] [-] [+] [-] [+] [-] [+] [-] [+]
[Select]
[+] & [-]
(5 sec.)
Black icon – Zone enabled
White icon – Zone disabled

Technician settings (Cont’)
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Fax: [phone]
[e-mail]
PYROCON19
Owner’s manual & Technician Settings
Pg. 20
Follow the steps below to set each of the active zones as Critical or Non-critical zone.
By default, all zones are critical.
1. Turn the thermostat ON.
2. Press and hold both the [+] and the [-] buttons simultaneously for 10 seconds.
3. Choose the required zone using the [Select] button. Selected zone number will appear on display
and the heater icon will flash.
4. Use the [+] button to set zone as Critical zone (“ON” will appear on display).
5. Use the [-] button to set zone as Non Critical zone (“OFF” will appear on display).
6. Repeat steps above 3 to 5 for any required zone.
7. Press and hold both the [+] and the [-] buttons simultaneously again for 5 seconds to return to
normal display.
Note: Critical zones will participate in the staggering scenario as long as it is snowing.
Once the snowing stopped, the system will continue staggering between critical zones for 3 more
cycles and then switch to staggering between the non-critical zones for the rest of the “time delay
before stopping the heaters” set by parameter P04.
Example:
- Zones 1,2,3,4 enabled
- Zones 1,2 Critical
- Zones 3,4 Non-critical
- Sequencing logic 1+3 together, 2+4 together
- Time delay before stopping the heaters: P04 = 9 hours.
- Splitting time: P06 = 120 minutes.
Select Critical zones
Starts snowing -
Snow detection ON
Start staggering
between
zones 1 and 2
(Critical zones)
60 minutes for each
zone
Stops snowing –
Snow detection OFF
Start staggering
between
zones 3 and 4
(Non-critical zones)
60 minutes for each
zone for the
remaining 9 hours