meitav-tec PYROSELF24 Series Innovative Snow Sensor and Controller Instruction Manual

Parameters that can be modified include Temperature set-point,
Ambient temperature limit, Time delay, ON time, Heaters cycle time,
Number of zones, Snow sensor settings, and Commissioning mode.

Installation Options:

Options for wall mount installation and roof side installation
are provided.

FAQ:

Q: Do I need to install an EGFPD with PYROSELF24 Series?

A: Yes, an EGFPD needs to be provided in the end application as
the product does not include an integral EGFPD.

Q: What should I do if the wire gauge is not suitable for the
circuit amperage draw?

A: Ensure the wire gauge meets the requirements specified in the
NEC/CEC table 1 for safe operation.

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PYROSELF24 Series Innovative Snow Sensor and Controller
Installation and Operating manual
Rev.10

Index
Safety warnings………………………………………………………………………………………. 3 Introduction………………………………………………………………………………………….. 4 Installation options ………………………………………………………………………………….. 5 Loads and Power supply connections stand alone…………………………………………. 6 Loads and Power supply connections with 1 X PYROBOX-1X2P …………………………. 7 Loads and Power supply connections with 2 X PYROBOX-1X2P …………………………. 8 Loads and Power supply connections with 1 X PYROBOX-2X3P …………………………. 9 IRP_PYRO installation – Indoor control interface (option for PYROSELF24-X)…………. 10 PYROSELF24/PYROSELF24-X – The outdoor snow and temperature sensor …………. 11 RT_PYRO – Infra red remote control unit (option) ……………………………………………. 13 Technician settings ………………………………………………………………………………… 14 P1 Temperature set point ……………………………………………………………………… 14 P2 Lower ambient temperature limit to stop heaters ……………………………………….. 14 P3 Time delay before stopping the heaters …………………………………………………. 15 P4 ON time for manual mode………………………………………………………………….. 15 P5(1) Snow sensor sensitivity……………………………………………………………………… 15 P5(2) Snow detection threshold ………………………………………………………………….. 15 P6 Number of outputs working together……………………………………………………… 16 P7 Length of staggering sequence …………………………………………………………… 16 P8 Commissioning / Test mode ………………………………………………………………. 16 P9 Restore defaults…………………………………………………………………………….. 16 IRP_PYRO – The indoor control interface …………………………………………………………. 17

Pg. 2
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
support@meitavtec.com

Safety warnings
PLEASE READ THIS MANUAL AND THE SAFETY WARNINGS CAREFULLY BEFORE INSTALLING AND USING THE CONTROLLER AND SAVE IT FOR FUTURE USE
Installation notes
Familiarize yourself with the markings, warnings, components and terminology.
The PYROSELF24, the PYROSELF24-X and their accessories must be installed by a qualified electrician in accordance with local regulations and the requirements of the NEC (NFPA 72 ) and the CEC part 1.
WARNING: Ensure the power is disconnect from all circuits before mounting the unit and making any connections. Contact with components carrying hazardous voltage can cause electric shock and may result in severe personal injury or death.
Installer must ensure the installation of approved disconnect means, for all power supply circuits feeding this unit.
The I.R receiver is suitable for indoor wall mount installation only.
Ensure wiring according to the provided schematics using copper conductors only.
Make sure the wire gauge (AWG) is suitable for the circuit amperage draw, as specified in the NEC/CEC table 1.
Ensure that the main breakers (fuses) are suitable for the heating systems rating (80% load).
Grounding means must comply with local regulations and CEC/NEC.
Ensure that the heating system/de-icing system connected to this unit complies with the UL 499 or UL 515 & CSA 22.2 # 130.3 standard and is certified / listed by an NRTL.
Ensure that all wiring is rated for the application at 60°C (140°F as per UL 515 CSA 22.2 #130 clause 12 table 12.1.

Ground fault circuit interrupter (GFCI)

The PYROSELF24 and the PYROSELF24-X DO NOT include an integral EGFPD (Equipment Ground Fault Protection Device).

EGFPD needs to be provided in the end application.

Power supply

Connect the supply wires as follows: – Connect the White wire to the “R” terminal on the PYROBOX or to 24VAC “R” input – Connect the Black wire to the “C” terminal on the PYROBOX or to 24VAC “C” input

24V R (White) C (Black)

Pg. 3
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
support@meitavtec.com

Introduction
The PYROSELF24 and the PYROSELF24-X are the ultimate “All in One” Snow Sensors & controllers for Light commercial and residential use. “Plug and Play” controllers for frost protection, ice and snow melting applications. When receiving a signal from the built-in snow sensor, they activate the relays, sending control command to the PYROBOX to energize the heating elements. Based on the configuration and settings, the two outputs Control 1 and Control 2 are activated together or in staggering mode. The outdoor temperature set-point as well as the ambient lower limit temperature can be easily set by the remote control. The Technician Settings mode allows installer or technician to adjust the parameters for customized installations using the remote control. The adjustable Hold-On timer, keeps the outputs to the zones active to ensure complete snow melting. The Hold-On (Time delay) is adjustable in the range of 0 up to 48 hours.
Features: Energy Efficient algorithm User friendly programming and setting adjustment using large LCD display remote control Up to 2 controls 1 and 2. Sequencing between controls Allowing larger snow melting area with less available power on site Optional indoor panel IRP-PYRO I.R. receiver Optional power boxes: PYROBOX-1X2P-120, PYROBOX-1X2P-240 or PYROBOX-2X3P Manual and Automatic modes. Selected by physical switch or using the remote control Technician testing / commissioning mode for easy and fast system test all year long (even during
summer or at high temperatures)
The parameters that can be modified are as follow: Temperature set-point Lower ambient temperature limit Time delay (Hold-on) before deactivating the heaters in Automatic mode ON time for Manual mode Heaters cycle time / Splitting time between the 2 zones Number of zones and sequence of operation Snow sensor RH sensitivity Snow sensor threshold Commissioning mode for technicians

Pg. 4
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
support@meitavtec.com

Installation options
1 6
2 3

Wall mount installation

Roof side installation

Roof installation

Pg. 5
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
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Pg. 6
PYROSELF24 Series
Owner’s manual & Technician Settings

“R” to White (1) “C” to Black (2) “P1” To Yellow (3) “C” to Yellow (4) “P2” to Red (5) “C” to Red (6)
“R” to White (1) “C” to Black (2) “P1” To Yellow (3) “C” to Yellow (4) “P2” to Red (5) “C” to Red (6)

Black BlackW Blue Blue Red Red
Black BlackW Blue Blue Red Red

Power supply

Loads and Power supply connections stand alone

Loads and Power supply connections with 1 X PYROBOX-1X2P

Relay

GFCI

Contactor 30A max. C2

Power supply

White Black Yellow Yellow Red Red

L1 L1 L2 L2

Transformer 12VA
120/24VAC
240/24VAC A C C P R R R

P/N

Supply Heater load

PYROBOX-1X2P-120 120VAC 120VAC, 30A max.

PYROBOX-1X2P-240 240VAC 240VAC, 30A max.

Alarm

RC Supply 24VAC Control1 – Dry contact

P1 C P2 C
Control1 Control2 Not in use

Pg. 7
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
support@meitavtec.com

Loads and Power supply connections with 2 X PYROBOX-1X2P

Relay

GFCI

Contactor 30A max. C2

Power supply

White Black Yellow Yellow Red Red

L1 L1 L2 L2

Transformer 12VA
120/24VAC
240/24VAC A C C P R R R

P/N

Supply Heater load

PYROBOX-1X2P-120 120VAC 120VAC, 30A max.

PYROBOX-1X2P-240 240VAC 240VAC, 30A max.

Alarm

Supply 24VAC

R C P1 C P2 C Control1 Control2

Control1 – Dry contact

Relay

GFCI

Contactor 30A max. C2

L1 L1 L2 L2

Transformer 12VA
120/24VAC
240/24VAC A C C P R R R

P/N

Supply Heater load

PYROBOX-1X2P-120 120VAC 120VAC, 30A max.

PYROBOX-1X2P-240 240VAC 240VAC, 30A max.

Alarm

Control2 – Dry contact

Pg. 8
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
support@meitavtec.com

Loads and Power supply connections with 1 X PYROBOX-2X3P

GFCI
IN 1 IN 2

Transformer 130VA
120/24VAC

C.T (Current Transformer)

Heater load connection L1,L2,L3 – 600 VAC max.
50 AMP max. per pole

Max. 60A,600VAC

C1 C2

Power supply

L1 N1

1 A C C C P1 P2 R R R PWR Ctrl1 Ctrl2

Test Reset GFCI

Main supply 120 VAC

Alarm

R C P1 C P2 C Supply 24VAC
Control1 – Dry contact Control2 – Dry contact

Branch circuit protection and disconnect provided by installer

White Black Yellow Yellow Red Red

Pg. 9
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
support@meitavtec.com

IRP_PYRO Installation – Indoor control interface (option for PYROSELF24-X)
Power supply

White Black Yellow Yellow Red Red

Connecting the indoor control panel IRP_PYRO (optional):

Pg. 10
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
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PYROSELF24 / PYROSELF24-X The outdoor snow and temperature sensors

Power supply

White Black Yellow Yellow Red Red

ON/OFF switch

Use the [ON/OFF] switch select:

– 0 (OFF)

The System will remain OFF even if it snows (should be used mainly

for summer times).

– 1 (MANUAL ON) The System will start heating for predefined time period set by parameter P4 in

the technician settings. The switch will automatically return to AUTO position.

Note: Heaters will start only when the set point temperature is at least 2°C/4°F

higher than the outdoor temperature.

– (AUTO)

The heating system will start depending on the outdoor temperature and

humidity sensed by the PYROSELF24 or the PYROSELF24-X and will stop after

the signal in gone for a predefined time period set by parameter P3 in the

technician settings.

Pg. 11
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
support@meitavtec.com

PYROSELF24 / PYROSELF24-X The outdoor snow and temperature sensors
LEDs indication

IR Receiver

AUX HEAT PWR

Yellow LED Red LED Relay ON Green LED SYSTEM ON

1 0

Switch position

Yellow (AUX)

Red (HEAT)

Green (PWR)

Comments

OFF

Auto mode
Snow detection
Heat cycling
Hold-on heating cycle

OFF

Blinks

Stand-by

1s.on/4s.off

Length of detection is

equal to P5(b) value

Blinks

1s.on/1s.off 1s.on/4s.off

threshold

As long as snow falls on

Blinks

the grid (sensor)

1s.on/4s.off

Once snow stops falling

End of Auto cycle

OFF

Blinks

Blinks Hold-on time is P3 value

3s.on/1s.off 1s.on/4s.off (Then back to Auto)

Manual ON

Then

mode

OFF

Length of heating cycle is P4 value ON (Then back to Auto)

Commissioning mode
(P8 = ON)

After manual exit from

commissioning mode or

Blinks

OFF

Blinks

after 30 minutes – back

2s.on/2s.off

1s.on/4s.off

to Auto

Pg. 12
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
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RT_PYRO – Infra red remote control unit (optional)

parameter numbers for technician settings (P1…P9) Or System status (Auto / Manual ON /OFF)

AUTO MANUAL ON OFF

mode

Note: In MANUAL ON mode, Note: Heaters will not start if the outdoor temperature is more than 2°C/4°F above the set point.

Turn system OFF
Switch between Parameter numbers of technician settings (press simultaneously with the [+] or [-])
Press to start AUTO MODE or Press and hold (3 seconds) to start MANUAL MODE.

On/Send

Parameters values for technician settings
Temperature scale (°C/°F)
Switch between temperature scales °C/°F Press and hold to enter technician settings Adjust parameters values

Pg. 13
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
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Technician settings Use the technician settings mode to view and adjust the following parameters:

P1 Temperature set point

P5(a) Snow sensor sensitivity

P2 Lower ambient temperature limit to stop P5(b) Snow detection threshold

heaters

P6 Number of outputs working together

P3 Time delay before stopping the heaters P7 Length of staggering sequence

P4 ON time for manual mode

P8 Commissioning / Test mode

P9 Restore defaults

Enter technician, select and modify parameters
Press and hold the [Mode] button for 3 seconds to enter technician settings mode the display will show “P1”.
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. Use the [+] and [-] buttons to modify values of selected parameter. Important! After updating values on the remote control, point the remote control to the IRP_PYRO IR
panel or to the PYROSELF24 and press the [On/Send] to save the updated values (of all the parameters except P8 which should be sent while “P8” appears on display) and send them to the system a beep will sound and the yellow LED will blink to indicate that the new settings are updated.
P1 – 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 P1, the PYROSELF24 will turn ON upon receiving a positive snow signal from the snow detector.

Snow detector

Ambient Temperature Temperature

temperature set point

set point

sensor

(°F)

(°C)

P2 – Lower limit temperature for heating

When the outdoor temperature drops below the low temperature

limit, the heating system will stop.

The lower limit is used to avoid energy wasting, as the heater will

not have enough power to melt the snow.

Range: -40…+32°F / -40…-0°C

Default: -31°F / -35°C

Cont’

Lower limit temperature for heating
(°F)

Lower limit temperature for heating
(°C)

Pg. 14
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
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Technician settings

P3 -Time delay before stopping the heaters in AUTO mode (hold ON)

Range: 0…300 minutes

Default: 90 minutes

Note 1. The time delay countdown will start when the snow detection signal from snow sensor will switch from positive to negative. Note 2. The staggering sequence will continue during the time delay period.

P4 – Manual mode ON time

The delay time parameter defines a time frame in which the heaters

remain ON after receiving an “Manual ON” command.

Range: 10…2880 minutes

Default: 240 minutes

P5(a) – Snow sensor sensitivity Range: 20…80 % (20% – Less sensitive, 80% – more sensitive) Default: 50 %

P5(b) – Snow detection threshold

Range: 00…60 minutes

Default: 5 minutes

When the snow sensor readings are changed, the system will

recheck the sensors readings repeatedly for the time period

defined by the “snow detection threshold” parameter, before

changing heaters status.

This process is used to eliminate false detection by the sensor.

Pg. 15
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
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Time delay to stop heaters
Manual mode ON time
Snow sensor sensitivity
Snow detection threshold Cont’

Technician settings (Cont’)
P6 Number of heating outputs working together “1” – One output “2” – Two outputs (default) “3” – Two outputs in staggering mode

P7 Length of staggering sequence

Range: 1…600 minutes

Default: 120 minutes

No. of heating outputs working
together

P8 – Test conditions mode / Technician commissioning mode
Turn ON test conditions to check the functionality of the system regardless of sensor 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. Note: If the technician did not manually exit test/commissioning mode, the unit will automatically return to normal mode after 30 minutes. Important! If changed, the new P8 value (ON or OFF) should be sent to the system using the [On/Send] button while P8 appears on display.

Comissioning mode

Length of staggering sequence
Normal operation

P9 Restore defaults
In order to restore the system to its default configuration, point the remote control to the IR panel and press the [On/Send] button 3 times.

On/Send

Pg. 16
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
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On/Send

IRP-PYRO – The indoor control interface (optional)
The IRP_PYRO can be operated using its [ON/OFF] button or using the RT_PYRO I.R. Remote control please refer to the RT_PYRO operating instructions in this manual.

SYSTEM ON

HEATERS ON

ON/OFF

ON/OFF button
Press the [ON/OFF] button to switch between: – OFF The System will remain OFF even if it snows (should be used mainly for summer times). – AUTO The heating system will start depending on the outdoor temperature and humidity sensed
by the PYROSELF24-X and will stop after the signal in gone for a predefined time period set by parameter P3 in the technician settings.

Press and hold the [ON/OFF] button for 3 seconds to start MANUAL ON mode. The System will start heating for predefined time period set by parameter P4 in the technician settings and return to AUTO MODE when this time ends. Note: Heaters will not start if the outdoor temperature is more than 2°C/4°F above the set point.
Note: Both AUTO and MANUAL ON commands can be submitted to the PYROSELF24-X, only when the manual ON/OFF switch on the bottom of the PYROSELF-24-X is in ON position ( )

LEDs indication
– GREEN LED (PWR) SYSTEM ON Lighting constantly System is ON. Blinking repeatedly (once every 5 seconds) System is in AUTO mode.
– RED LED (HEAT) HEATERS ON Lighting constantly Heaters are turned ON. Blinking repeatedly (2 seconds ON and 1 second OFF) System is in OFF DELAY period. Blinking repeatedly (1 second ON and 3 seconds OFF) SYSTEM ERROR indication.

Pg. 17
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
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Notes

Pg. 18
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
support@meitavtec.com

Notes

Pg. 19
PYROSELF24 Series
Owner’s manual & Technician Settings

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
support@meitavtec.com

Tel: 1.844.400.HVAC (4822) Tel: +972-3-9626462 Fax: +972-3-9626620
support@meitavtec.com www.meitavtec.com

Documents / Resources

meitav-tec PYROSELF24 Series Innovative Snow Sensor and Controller [pdf] Instruction Manual
PYROSELF24 Series Innovative Snow Sensor and Controller, PYROSELF24 Series, Innovative Snow Sensor and Controller, Sensor and Controller, Controller

References

User Manual

PYROSELF24 Series Innovative Snow Sensor and Controller

Specifications:

Product Usage Instructions:

Safety Warnings:

Installation Notes:

Power Supply Connection:

Parameter Modifications:

Installation Options:

FAQ:

Q: Do I need to install an EGFPD with PYROSELF24 Series?

Q: What should I do if the wire gauge is not suitable for the
circuit amperage draw?

Documents / Resources

References

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