tekmar 654 Installation

Installation & Operation Manual

Snow Melting Control 654

Snow Melting

654_D

06/13

Replaces: New

Introduction

The Snow Melting Control 654 is designed to operate electric or hydronic equipment to melt snow or ice from any surface including driveways, walkways, patios, business entrances, parking ramps, loading docks, hospital entrances, helipads or car wash bays. The surface temperature for snow melting is controlled automatically to reduce operating energy costs. The 654 has an automatic start and stop function when used with the Snow/Ice Sensor 090 or 094. Automatic start with a timed stop is available when used with the Snow Sensor 095. The 654 can operate a dedicated hydronic boiler or a mixing device. Isolation relays are required to operate line voltage pumps. Electric systems require a separate GFCI and electrical relay contactor.

Features

Automatic Snow / Ice Detection

• Supports Both Inslab & Retrofit Aerial Sensors

• Manual Start With Timer

• Programmable Schedule

• tekmarNet

• Warm Weather Shut Down

• Cold Weather Cut Out

• Idling

• Snow Melt Zoning With Priority

• Tandem Snow / Ice Detection

• Slab Protection

• Storm

• EconoMelt

• Manual Override

• Snow Melt Zone Tracking

• Scenes

• Away Key

• Exercising

• Alert Output

•

Communication Compatible

Table of Contents

Important Safety Information .............................................3

Installation .........................................................................4

Preparation .................................................................... 4

Physical Dimensions ..................................................... 4

Installation Location ....................................................... 4

Rough-In Wiring ............................................................. 4

Sizing the Transformer ..................................................5

Control Wiring ................................................................5

Sensor Wiring ................................................................ 7

Testing the Sensor Wiring ............................................. 8

Testing the Control Wiring .............................................8

Manual Override - Maximum Heat ................................ 9

Manual Override - Test .................................................. 9

Manual Override - Purge ............................................... 9

Manual Override - Off .................................................... 9

Switch Settings ..................................................................9

User Interface ...................................................................10

Display .......................................................................... 10

Operation Field ............................................................. 10

Status Field ................................................................... 10

Symbols ........................................................................ 10

Programmable Settings....................................................11

Programming Menus .................................................... 11

Access Levels and Access Level Lock ........................ 11

View Menu .................................................................... 12

Set Temp Menu ............................................................ 14

Time Menu .................................................................... 15

Schedule Menu ............................................................ 16

Display Menu ................................................................ 17

Scene Menu ................................................................. 17

Monitor Menu ................................................................ 18

Toolbox Menu ............................................................... 19

Override Menu .............................................................. 20

System Menu ................................................................21

Boiler Menu .................................................................. 22

Mix Menu ...................................................................... 23

tekmarNet

Menu .........................................................24

Sequence of Operation ....................................................25

Snow Melting Overview ................................................25

Slab Temperature Control ............................................ 25

Melt Operation .............................................................. 25

Melt - Manual Start and Timed Stop ............................26

Melt - Automatic Start and Stop ................................... 26

Melt - EconoMelt........................................................... 27

Melt - Automatic Start and Timed Stop ........................ 27

Melt - Tracked Start and Stop ......................................28

Melt - Scheduled Start and Stop .................................. 28

Additional Melting Time ................................................ 29

Idle Operation ............................................................... 29

Storm Operation ........................................................... 29

Warm Weather Shut Down ...........................................30

Cold Weather Cut Out ..................................................30

Away Scene ..................................................................30

Programmable Schedules ............................................ 31

Time Clock .................................................................... 31

Snow Melt Zones and Priority ......................................31

Slab Protection .............................................................33

Application Modes ........................................................ 33

Electric Operation ......................................................... 33

Pulse Width Modulation Operation ..............................33

Boiler Operation ........................................................... 33

Mixing Operation ..........................................................35

Tandem Snow / Ice Detection ......................................36

Exercising ..................................................................... 36

Alert Relay ....................................................................36

Pump Post Purge.......................................................... 36

Melt and Storm Groups ................................................ 37

User Switch Setup ........................................................ 37

Troubleshootin g ............................................................... 38

Error Messages ............................................................38

Frequently Asked Questions ........................................42

Job Record .......................................................................42

Technical Data ................................................................. 44

Limited Warranty and Product Return Procedure ........... 44

Getting Started

Congratulations on the purchase of your new Snow Melting Control! This manual covers the complete installation, programming and sequence of operation for this control. You will also find

instruction on testing, commissioning, and troubleshooting the control and system that it operates.

Important Safety Information

It is your responsibility to ensure that this control is safely installed according to all applicable codes and standards. tekmar is not responsible for damages resulting from improper installation and/or maintenance.

To avoid serious personal injury and damage to the equipment:

Read Manual and all product labels

• BEFORE using the equipment. Do not use unless you know the safe and proper operation of this equipment.

•

Keep this Manual available for easy access by all users.

•

Replacement Manuals are available at tekmarControls.com

•

Disconnect all power before opening the control.

Radio Frequency Interference

The installer must ensure that this control and its wiring are isolated and/or shielded from strong sources of electromagnetic noise. Conversely, this Class B digital apparatus complies with Part 15 of the FCC Rules and meets all requirements of the Canadian Interference-Causing Equipment Regulations. However, if this control does cause harmful interference to radio or television reception, which is determined by turning

It is the installers responsibility to ensure that this control

• is safely installed according to all applicable codes and standards.

Improper installation and operation of this control could result

• in damage to the equipment and possibly even personal injury or death.

This electronic control is not intended for use as a primary

• limit control. Other controls that are intended and certified as safety limits must be placed into the control circuit.

Do not attempt to service the control. There are no user

• serviceable parts inside the control. Attempting to do so voids warranty.

the control off and on, the user is encouraged to try to correct the interference by re-orientating or relocating the receiving antenna, relocating the receiver with respect to this control, and/or connecting the control to a different circuit from that to which the receiver is connected.

Cet appareil numérique de la classe B respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

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Installation

Preparation

Tools Required

tekmar or jeweller screwdriver

• Phillips head screwdriver

•

Materials Required

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18 AWG LVT Solid Wire (Low Voltage Connections)•

Physical Dimensions

Front View

(127 mm)

3-1/4"

(82 mm)

Side View

Needle-nose Pliers

• Wire Stripper

•

tekmar 24 V (ac) Transformer 009

•

Mounting Base

9/16"

(14 mm)

1-7/8"

(47 mm)

(102 mm)

15/16"

(23 mm)

3/4"

(19 mm)

tN4Aux Ht R C

(23 mm)

2-1/2"

(64 mm)

654

Brn

Mod

Slab

29/32"

No Power

(38 mm)

BlkYel Blu Red Sup

ComCom

1-1/2"

13/16 "

(20 mm)

3-1/4"

(83 mm)

Out/ Bret

Installation Location

When choosing the location for the control, consider the following:

Interior Wall.

• Keep dry. Avoid potential leakage onto the control.

• Relative Humidity less than 90%. Non-condensing

• environment.

No exposure to extreme temperatures beyond -4 to

• 122°F (-20 to 50°C).

No draft, direct sun, or other cause for inaccurate

• temperature readings.

Rough-In Wiring

Low Voltage Wiring

Each cable must be pulled from the equipment to the control’s plastic enclosure. All low voltage wiring connections enter the enclosure through the square knockout on the rear. It is recommended to label each cable for easy identification. All low voltage wires are to be stripped to a length of 3/8" (9 mm) to ensure proper connection to the control.

Pull four conductor 18 AWG LVT cable, up to 500 feet (150 m) for the following equipment:

•

Snow Sensor 095

Pull five conductor 18 AWG LVT cable, up to 500 feet (150 m) for the following equipment:

Snow / Ice Sensor 090 or 094

•

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Away from equipment, appliances, or other sources of

• electrical interference.

Easy access for wiring, viewing, and adjusting the display

• screen.

Approximately 5 feet (1.5 m) off the finished floor.

• The maximum length of wire is 500 feet (150 m).

• Strip wire to 3/8" (10 mm) for all terminal connections.

• Use standard 8 conductor, 18 AWG wire.

•

Pull two conductor 18 AWG LVT cable, up to 500 feet (150 m) for the following equipment:

•

24 V (ac) power from transformer

•

Outdoor temperature sensor

•

Supply sensor (if applicable)

•

On/off boiler (if applicable)

•

Modulating boiler 0-10 V (dc) or 4-20 mA (if applicable)

•

Mixing valve or mixing injection pump 0-10 V (dc) or 4-20 mA (if applicable)

•

Boiler return temperature sensor (if applicable)

•

Alert output (if applicable)

•

tekmarNet

4 communication to other devices

Sizing the Transformer

-------------------------------

--------------------------

------

-----

The control requires an external transformer. A tekmar Transformer 009 can supply up to 40 VA, and includes an in-line fuse to protect the transformer and control.

The total power capacity of the power supply should be larger than the total load of all the devices connected to the control. This total load must not exceed 100 VA.

Control Wiring

See Application Brochure 654_A for specific application wiring diagrams.

Snow / Ice Sensor

Mod

tN4Aux Ht R C

-------------------------------

Snow / Ice Sensor

090 or 094

No Power

Brn

Slab

Out/

BlkYel Blu Red Sup

Com–

Bret

Snow and Slab Sensor

--------------------------

Snow Sensor

095

Slab Sensor 072 or 073

No Power

Brn

Mod

tN4Aux Ht R C

Slab

Out/

BlkYel Blu Red Sup

Com–

Bret

Snow

Sensor

095

Outdoor, Supply and Boiler Return Sensor

------

Modulating Output and tN4 Communication

-----

Modulating Boiler

Mixing Valve or

Mixing Injection Pump

0-10 V (dc) Signal

– +

tN4Aux Ht R C

Slab

Out/

BlkYel Blu Red Sup

Com–

Bret

Supply Sensor

082

Outdoor

Sensor

070

No Power

Brn

Mod

tN4 C

tekmarNet

Communication

Mod

tN4Aux Ht R C

No Power

Brn

Slab

Out/

BlkYel Blu Red Sup

Com–

Bret

Boiler

Return

Sensor

082

tN4 Wiring Center or Zone Manager

-------------

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------------------------------

-------------

Alert Relay Output

------------------------------

tN4 C R W tN4 C R W

Zone 1

Zone 2

tN4 Wiring Center or Zone Manager

Transformer and Relays

Transformer 009

L N

tN4Aux Ht R C

Slab

Out/

BlkYel Blu Red Sup

Com–

Bret

Mod

tN4Aux Ht R C

No Power

Brn

Mod

No Power

Brn

Slab

Out/

BlkYel Blu Red Sup

Com–

Bret

Alert

Equipment

--------------------------------------------------------------------------------

R C

Relay 003

3 4 5 6

2 1 8 7

Relay 003

5 6

System

Pump

LNG

On/Off Boiler

115 V (ac)

tN4Aux Ht R C

Slab

Out/

BlkYel Blu Red Sup

Com–

Bret

No Power

Brn

Mod

Sensor Wiring

--------------------------------------------------------------------------

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Mounting the Outdoor Sensor

--------------------------------------------------------------------------

Notice: The temperature sensor (thermistor) is built into the sensor enclosure.

Remove the screw and pull the front cover off the sensor

• enclosure.

•

The outdoor sensor can either be mounted directly onto a wall or a 2" x 4" electrical box. When the outdoor sensor is wall mounted, the wiring should enter through the back or bottom of the enclosure. Do not mount the outdoor sensor with the conduit knockout facing upwards as rain could enter the enclosure and damage the sensor.

Sensor with rear entry wiring

In order to prevent heat transmitted through the wall from

• affecting the sensor reading, it may be necessary to install an insulating barrier behind the enclosure.

The outdoor sensor should be mounted on a wall which best

• represents the heat load on the building (a northern wall for most buildings and a southern facing wall for buildings with large south facing glass areas). The outdoor sensor should not be exposed to heat sources such as ventilation or window openings.

•

The outdoor sensor should be installed at an elevation above the ground that will prevent accidental damage or tampering.

Sensor with bottom entry wiring

Sensor mounted onto 2" x 4" electrical box

Wiring the Outdoor Sensor

Connect 18 AWG or similar wire to the two terminals provided in the enclo-

•

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sure and run the wires from the outdoor sensor to the control. Do not run the wires parallel to telephone or power cables. If the sensor wires are located in an area with strong sources of electromagnetic interference (EMI), shielded cable or twisted pair should be used or the wires can be run in a grounded metal conduit. If using shielded cable, the shield wire should be connected to the Com or Com Sen terminal on the control and not to earth ground.

Follow the sensor testing instructions in this brochure and connect the

• wires to the control.

Replace the front cover of the sensor enclosure.

•

Mounting the Universal Sensor

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NOTICE: These sensors are designed to mount on a pipe or in a temperature immersion well.

The Universal Sensor should be placed downstream of a pump or after an elbow or similar fitting. This is especially important if large diameter pipes are used as the thermal stratification within the pipe can result in erroneous sensor readings. Proper sensor location requires that the fluid is thoroughly mixed within the pipe before it reaches the sensor.

Strapped to Pipe

The Universal Sensor can be strapped directly to the pipe using the cable tie provided. Insulation should be placed around the sensor to reduce the effect of air currents on the sensor measurement.

Wires from outdoor sensor to control’s outdoor sensor and sensor common terminals

Sensor is built into the enclosure

Immersion Well

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If a Universal Sensor is mounted onto 1" (25 mm) diameter L type copper pipe, there is approximately an 8 second delay between a sudden change in water temperature and the time the sensor measures the temperature change. This delay increases considerably when mild steel (black iron) pipe is used. In general, it is recommended that a temperature well be used for steel pipe of diameter greater than 1-1/4" (32 mm). Temperature wells are also recommended when large diameter pipes are used and fluid stratification is present.

Conduit Connection

The Universal Sensor and Universal Sensor Enclosure 080 (sold separately) are specifically designed to mount onto a 3/8" (10 mm) ID temperature well that is supplied with an end groove. To install the well, plumb a ‘T’ into the pipe and fix the well into the ‘T’. The 080 enclosure has a 7/8" (22 mm) back knockout that must be removed and fitted over the temperature well. The universal sensor is then inserted into the well and the retaining clip supplied with the enclosure is snapped onto the well end groove. If the well has a threaded end, the installer must supply a standard threaded conduit retaining ring. The two wires from the sensor are connected to the terminal block provided in the enclosure. The other side of the terminal block is used to connect wires from the control.

Testing the Sensor Wiring

Retaining

Clip

Universal

Sensor

Sensor Well

Universal

Sensor

Bottom of

Enclosure 080

Cable Tie

A good quality test meter capable of measuring up to 5,000 kΩ (1 kΩ = 1000 Ω) is required to measure the sensor resistance. In addition to this, the actual temperature must be measured with either a good quality digital thermometer, or if a thermometer is not available, a second sensor can be placed alongside the one to be tested and the readings compared.

First measure the temperature using the thermometer and then measure the resistance of the sensor at the control. The wires from the sensor must not be connected to the control while the test is performed. Using the chart below, estimate

Temperatur e Re sistance Temperatur e Resistance Temperature Resistance Temper ature Resistance

°F °C

-50 -46 490,813 20 -7 46,218 90 32 7,334 160 71 1,689

-45 -43 405,710 25 -4 39,913 95 35 6,532 165 74 1,538

-40 -40 336,606 30 -1 34,558 100 38 5,828 170 77 1,403

-35 -37 280,279 35 2 29,996 105 41 5,210 175 79 1,281

-30 -34 234,196 40 4 26,099 110 43 4,665 180 82 1,172

-25 -32 196,358 45 7 22,763 115 46 4,184 185 85 1,073

-20 -29 165,180 50 10 19,900 120 49 3,760 190 88 983

-15 -26 139,403 55 13 17,436 125 52 3,383 195 91 903

-10 -23 118,018 60 16 15,311 130 54 3,050 200 93 829

-5 -21 100,221 65 18 13,474 135 57 2,754 205 96 763 0 -18 85,362 70 21 11,883 140 60 2,490 210 99 703 5-15 72,918 7524 10,501 14563 2,255 215102 648

10 -12 62,465 80 27 9,299 150 66 2,045 220 104 598 15 -9 53,658 85 29 8,250 155 68 1,857 225 107 553

°F °C °F °C °F °C

the temperature measured by the sensor. The sensor and thermometer readings should be close. If the test meter reads a very high resistance, there may be a broken wire, a poor wiring connection or a defective sensor. If the resistance is very low, the wiring may be shorted, there may be moisture in the sensor or the sensor may be defective. To test for a defective sensor, measure the resistance directly at the sensor location.

Do not apply voltage to a sensor at any time as damage to the sensor may result.

Testing the Control Wiring

Testing the Power

1. Remove the front cover from the control.

2. Use an electrical test meter to measure (ac) voltage between the R and C terminals. The reading should be 24 V (ac) +/– 10%.

3. Install the front cover.

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Testing the Relay Outputs

-----------------------

The control includes an Override menu to check if the control’s relays are operating and that the control is wired correctly to the snow melting equipment.

Step 1: Step 2: Step 3: Step 4: Step 5:

Press and hold the Home button for 3 seconds. Press NEXT to navigate to the Override menu. Press ENTER to enter the Override menu. Select Manual Override to Hand. For hydronic systems, set System Pump to On. The

system pump should now be operating.

Manual Override - Maximum Heat

Step 6:

Step 7:

Step 8:

Step 9:

Step 10:

Set Heat Relay to On. The boiler or electric heating cables should start heating.

For modulating boilers change the Boiler Percent from 0 to 100%. The boiler should be firing.

For a mixing valve or mixing injection pump, change the Mix Percent from 0 to 100%. The mixing valve should open or the mixing injection pump should increase speed.

Select the Override Time after which the control resumes normal operation.

Exit the Manual Override by selecting Auto.

In hydronic application modes, the control includes a Maximum Heat operation where the control operates the snow melting system to maintain the maximum allowed heating setpoints. This allows testing of the snow melting system during warm weather.

Manual Override - Test

When operating an electric snow melting system, the control includes a Test operation where the electrical heating cables can be energized for 10 minutes after which the control resumes normal operation. This allows testing of the electric snow melting system during warm weather.

Manual Override - Purge

When operating a hydronic snow melting system, it is necessary to purge and bleed all air out of the system. The control includes a Purge operation where the System Pump as well as pumps operated by the tekmarNet® system are all turned on to assist in purging air from the system.

Step 1: Step 2: Step 3: Step 4: Step 5:

Step 6:

Step 1: Step 2: Step 3: Step 4: Step 5:

Step 6:

Press and hold the Home button for 3 seconds. Press NEXT to navigate to the Override menu. Press ENTER to enter the Override menu. Select Manual Override to Max. Select the Maximum Heat Time after which the control

resumes normal operation. Exit the Manual Override by selecting Auto.

Press and hold the Home button for 3 seconds. Press NEXT to navigate to the Override menu. Press ENTER to enter the Override menu. Select Manual Override to Test. Exit the Manual Override by selecting Auto.

Press and hold the Home button for 3 seconds. Press NEXT to navigate to the Override menu. Press ENTER to enter the Override menu. Select Manual Override to Purge. Select the Maximum Purge Time after which the control

resumes normal operation. Exit the Manual Override by selecting Auto.

Manual Override - Off

The snow melting system can be manually turned off and the control remains off until manually changed back to Auto. This allows the installer or end user to permanently disable the snow melting system without removing power from the control.

Step 1: Step 2: Step 3: Step 4: Step 5:

Press and hold the Home button for 3 seconds. Press NEXT to navigate to the Override menu. Press ENTER to enter the Override menu. Select Manual Override to Off. Exit the Manual Override by selecting Auto.

Switch Settings

1058-01

Switch

H1220A

Lock

Snow Melting Control 654

tekmarNet Electric or Hydronic Boiler/Mixing

www.tekmarControls.com

Settings

Power: 24 V (ac) ±10%, 60 Hz, Class 2, 16 VA standby, 100 VA fully loaded

Unlock

Relays: 24 V (ac) 2 A, 3.5 A combined

Unused

Designed and assembled in Canada Meets Class B: ICES & FCC Part 15

Switch

Back of Control

Position

OFF

Action

LOCK ACCESS LEVEL

The control is locally locked and the access level cannot be changed. Set to Lock when installation has been completed.

UNLOCK ACCESS LEVEL

The control is unlocked and the access level may be changed. Go to the Toolbox menu to change the access level. Set to Unlock during the installation process.

Note: tekmarNet

system controls include a Global Lock that locks all connected snow melt controls, and thermostats. Set the tekmarNet® system control to unlock to allow access level adjustment on all connected devices.

Not used Not used

User Interface

Display

Status Field

Operation Field

Touch to display Run Time, Outdoor & Slab Temperature

Touch to quickly enter the View menu

Touch to turn system

off while away

Touch to

Melt or Stop

Touch to adjust settings

Operation Field

MELT System is melting snow or ice.

IDLE System is idling.

Status Field

WWSD

CWCO Cold Weather Cut Out. Too cold to melt.

TIMED

Warm Weather Shut Down. The slab is naturally warm enough to melt snow or ice.

Timed melting operation. System operates until time has elapsed.

Touch to go to the next setting

Home Button Return to the Home Screen

Press and hold for 3 seconds to access the

Home

Button

ENTER

programming menus.

STRM System is in storm operation.

OFF System is off.

PEND

WAIT

SENSOR

Pending. The system has detected water but it is too cold to operate or the schedule is in Idle or Off.

Zone priority in effect. Zone must wait until higher priority zone finishes melting.

Tandem 090 sensor.

WARM Slab is warming up to the melting temperature.

AWAY

Away scene. No melting until the away scene is exited.

Symbols

HEAT ON

Heat is turned on.

tekmarNet

Communication is present.

TRACK

This zone tracks the melting operation of zone 1.

WARNING SYMBOL

Indicates an error is present.

ARROWS

Adjust the displayed setting.

Programmable Settings

--------------------

------------------------------------

Programming Menus

Press and hold the Home button for 3 seconds to enter the programming menus. The control returns to the last programming menu previously used.

Press and hold for 3 seconds to access the programming menus.

Select a Programming Menu

Touch “NEXT” to advance (clockwise in above illustration)

• to the next menu.

•

Touch “BACK” to go backwards (counterclockwise in above illustration) through the menus.

•

Touch “ENTER” to enter a menu.

--------------------

Access Levels and Access Level Lock

The control is shipped pre-programmed with common settings. The control has an “Installer” access level that allows full access to all settings and a “User” access level that restricts the number of settings available. The control defaults to the “

User” access level after 12 hours of operation.

Notice: tekmarNet® system controls include a Global Lock that locks all connected snow melting controls and thermostats. Set the tekmarNet® system control to unlock to allow access level adjustment on all connected devices.

Setting Items

Touch or arrow to adjust the setting if required.

•

Touch “NEXT ITEM” to advance to the next item within the menu.

•

Touch “BACK ITEM” to go backwards to the previous item within the menu.

•

To return to the parent menu after changing a setting, press and release the Home button.

•

To return to the Home screen, press and release the Home button twice or wait 30 seconds to automatically return to the Home screen.

To change to the “Installer” access level:

•

In the Toolbox menu, locate Access Adjust the access level to “Installer” by pressing the up or down

• button. This will permit setting changes to the control.

------------------------------------

View Menu (1 of 2)

The View menu items display the current operating temperatures and status information of the system.

Item Field Range Access Description Set to

1 to 12

– – –, -76 to

149°F

(-60 to 65°C)

– – –, -76 to

149°F

(-60 to 65°C)

-76 to 149°F

(-60 to 65°C)

DRY or WET

User

Installer

User

Installer

User

Installer

User

Installer

SNOW ZONE

The snow melt zone number on the tekmarNet® system.

Conditions: tekmarNet

OUTDOOR

Current outdoor air temperature as measured by the local or remote outdoor sensor. The outdoor air temperature is shared to all devices in the tekmarNet® system. “– – –” is displayed when no outdoor sensor is available.

Conditions: Application Mode is set to PWM, Boil, Mix or Elec.

SLAB TARGET

The calculated slab target of the snow melting system. “– – –” is displayed when the snow melt control is off.

Conditions: Application Mode is set to PWM, Boil, Mix or Elec and a snow/ice sensor or slab sensor is installed.

SLAB

Current slab temperature as measured by the control. Conditions: Application Mode is set to PWM, Boil, Mix or Elec

and a snow/ice sensor or slab sensor is installed.

WATER SENSOR

Current status of the water detection sensor. Conditions: A snow/ice sensor or snow sensor is installed.

communication available.

---, 70 to 200°F

(21.0 to 93.5°C)

---, 70 to 200°F

(21.0 to 93.5°C)

-58 to 212°F

(50.0 to 100.5°C)

-58 to 212°F

(50.0 to 100.5°C)

0 to 100% Installer

Installer

BOILER TARGET

The calculated boiler target of the snow melt system. “– – –” is displayed when the snow melt control is not operating the boiler.

Conditions: Application Mode is set to Boil.

MIX TARGET

The calculated mix target of the snow melt system. “– – –” is displayed when the snow melt control is not operating the mixing valve or mixing injection pump.

Conditions: Application Mode is set to Mix.

SUPPLY

Current system supply temperature as measured by the control.

Conditions: Application Mode is set to PWM, Boil or Mix.

BOILER RETURN

Current boiler return temperature as measured by the control.

Conditions: Application Mode is set to PWM, Boil or Mix and Out/Bret Sensor is set to Bret (boiler return sensor).

MIX RATE

Current position of the mixing valve or mixing injection pump speed.

Conditions: Application Mode is set to Mix.

BOILER RATE

0 to 100% Installer

Current firing rate of the modulating boiler. Conditions: Application Mode is set to Boil and Boiler Type

is set to Mod (modulating boiler).

View Menu (2 of 2)

Item Field Range Access Description Set to

HEAT RELAY

OFF or ON

User

Installer

0 to 100% Installer

Current status of the heat relay. The boiler, pump or electric cable is on when ON is displayed. The boiler, pump or electric cable is off when OFF is displayed.

Conditions: Application Mode is set to PWM, Boil, Mix, or Elec.

PWM RATE

Current duty cycle rate of the zone or boiler for each 20 minute cycle.

Conditions: Application Mode is set to PWM or Elec. Not visible when Manual Override is not Auto.

OFF or ON

00:00 to 24:00

hours

00:00 to 6:00

hours

User

Installer

User

Installer

User

Installer

User

Installer

SYSTEM PUMP RELAY

Current status of the system pump relay. Conditions: Application Mode is set to PWM, Boil or Mix and

Auxiliary Relay is set to SYS (system pump).

ALERT RELAY

Current status of the alert relay. Conditions: Application Mode is set to PWM, Boil or Mix and

Auxiliary Relay is set to ALRT (alert) or Application Mode is set to Elec.

MANUAL MELT TIME

When manually started, the display shows the remaining run time before shutting off.

Conditions: Application Mode is set to PWM, Boil, Mix or Elec.

ADDITIONAL MELT TIME

When automatically started by a Snow/Ice Sensor 090 or 094, the display shows the remaining run time before shutting off.

Conditions: Application Mode is set to PWM, Boil, Mix or Elec and a snow / ice sensor 090 or 094 is installed.

Set Temp Menu

The Set Temp menu items select the operating temperatures of the snow melt system.

Item Field Range Access Description Set to

32 to 95°F

(0.0 to 35.0°C)

Default = 36°F

(2.0°C)

OFF, 20 to 95°F

(-6.5 to 35.0°C)

Default = OFF

OFF, 20 to 95°F

(-6.5 to 35.0°C)

Default = 28°F

(-2.0°C)

User

Installer

MELTING

Select the desired surface temperature of the snow melt surface when melting.

Conditions: Application Mode is set to PWM, Boil, Mix or Elec.

IDLING

Select the desired surface temperature of the snow melt surface when idling. Idling pre-heats the slab when the slab is dry but cold and allows faster reaction time to reach the melting temperature. Recommended for commercial use only.

Conditions: Application Mode is set to PWM, Boil, Mix or Elec.

STORM

Select the desired surface temperature of the snow melt surface while operating in the storm operation. Storm operation temporarily pre-heats the slab to allow faster reaction time to reach the melting temperature.

Conditions: Application Mode is set to PWM, Boil, Mix or Elec.

0:30 to 24:00

hours

Default = 4:00

hours

0:00 to 6:00

hours

Default = 0:00

hours

0:30 to 24:00

hours

Default = 8:00

hours

AUTO, MIN, -2,

-1, MID, +1, +2, MAX

Default = AUTO

AUTO, 32 to

95°F

(0.0 to 35.0°C)

Default = AUTO

User

Installer

MANUAL MELT RUN TIME

Select the amount of running time when manually starting the system.

Conditions: Application Mode is set to PWM, Boil, Mix or Elec.

ADDITIONAL MELT TIME

Select the amount of additional melting time after the Snow / Ice Sensor 090 or 094 is dry. This allows low spots on the slab to fully dry before the snow melting system is shut off.

Conditions: Conditions: Application Mode is set to PWM, Boil, Mix or Elec and a Snow / Ice Sensor is installed or Track Zone is set to On.

STORM RUN TIME

Select the amount of storm run time to pre-heat the slab when advised of a winter storm warning.

Conditions: Application Mode is set to PWM, Boil, Mix or Elec and Storm is set to a temperature.

WATER SENSITIVITY

Select how sensitive the Snow / Ice Sensor 090 or 094, or the Snow Sensor 095 is to water detection.

Conditions: Snow / Ice Sensor is set to 090 or 095.

WARM WEATHER SHUT DOWN

Select the temperature at which to shut down the snow melting system during warm weather. This allows the snow or ice to melt off the slab naturally.

Conditions: Application Mode is set to PWM, Boil, Mix or Elec.

OFF, -30 to 50°F (-34.5 to 10.0°C)

Default = 10°F

Installer

(-12.0°C)

COLD WEATHER CUT OUT

Select the temperature at which to shut down the snow melting system during extremely cold weather. Below this temperature, the heat loss of the slab exceeds the capacity of the boiler or heating appliance.

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