tekmar 654 Installation

Installation & Operation Manual	654_D
Snow Melting Control 654	06/13
Snow Melting	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® Communication Compatible

• 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

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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
Troubleshooting...............................................................	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.

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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.

•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.

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

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	•	Needle-nose Pliers
•	Phillips head screwdriver	•	Wire Stripper

Materials Required -------------------------------------------------------------------------------------

• 18 AWG LVT Solid Wire (Low Voltage Connections) • tekmar 24 V (ac) Transformer 009

Physical Dimensions

Front View	Side View	Mounting Base			29/32"
				(23 mm)
		9/16"				13/16"
		(14 mm)
					CL	(20 mm)
			CL
		1-7/8"
		(47 mm)		2-1/2"
				(64 mm)
5"		4"	3/4"			3-1/4"
(127 mm)			(19 mm)			(83 mm)
		(102 mm)
				654	No Power
			Aux Ht R C	tN4 Mod Brn Yel Blu Red Blk Out/ Sup
			Com	+ Slab	Com Bret
				CL
3-1/4"	15/16"				1-1/2"
(82 mm)	(23 mm)
					(38 mm)

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.

•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.

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

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

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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 -------------------------------	Snow and Slab Sensor --------------------------
Snow / Ice Sensor	Snow Sensor
090 or 094	095
	Slab Sensor
	072 or 073
	Snow
	Sensor
	095

	tN4 Mod Brn Yel	No Power
Aux Ht R C		Blu Red Blk Out/Sup
–	+ Slab	Com Bret

	tN4 Mod Brn Yel	No Power
Aux Ht R C		Blu Red Blk Out/Sup
–	+ Slab	Com Bret

------Outdoor, Supply and Boiler Return Sensor

-----Modulating Output and tN4 Communication

Modulating Boiler

Mixing Valve or

Mixing Injection Pump

0-10 V (dc) Signal

– +

		No Power					No Power
Aux Ht R C	tN4 Mod Brn Yel	Blu Red Blk Out/Sup		tN4 C	Aux Ht R C	tN4 Mod Brn Yel	Blu Red Blk Out/Sup
–	+ Slab	Com Bret		tekmarNet®4	–	+ Slab	Com Bret
		Supply	Outdoor
				Communication
		Sensor	Sensor

082070 or

Boiler

Return

Sensor

082

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tN4 Wiring Center or Zone Manager -------------

Alert Relay Output ------------------------------

			No Power			No Power
Aux Ht R	C	tN4 Mod Brn Yel Blu Red Blk Out/Sup		Aux Ht R C	tN4 Mod Brn Yel Blu Red Blk Out/Sup
tN4 C R W tN4 C R W	–	+ Slab	Com Bret	–	+ Slab	Com Bret
Zone 1 Zone 2
tN4 Wiring Center				Alert
or Zone Manager
				Equipment

Transformer and Relays --------------------------------------------------------------------------------

Transformer 009

L	R
N	C

				tN4 Mod Brn Yel	No Power
Relay 003	Relay 003	Aux Ht R	C		Blu Red Blk Out/Sup
			–	+ Slab	Com Bret

	3	2	3	2
	4	1	4	1
	5	8	5	8
	6	7	6	7
T	T			System
				Pump
		G	N	L

On/Off Boiler

115 V (ac)

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Sensor Wiring

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.

•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 rear	Sensor with bottom	Sensor mounted
entry wiring	entry wiring	onto 2" x 4"
		electrical box

Wiring the Outdoor Sensor -----------------------------------------------------------------------------

•Connect 18 AWG or similar wire to the two terminals provided in the enclosure 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.

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

Sensor is built into the enclosure

Mounting the Universal Sensor-------------------------------------------------------------------------

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.

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Immersion Well

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.

Retaining

Clip

Universal

Sensor

Sensor Well

Bottom of

Enclosure 080

Universal Cable Tie

Sensor

Testing the Sensor Wiring

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

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.

Temperature		Resistance	Temperature		Resistance	Temperature		Resistance	Temperature		Resistance
°F	°C		°F	°C		°F	°C		°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	75	24	10,501	145	63	2,255	215	102	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

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: Press and hold the Home button for 3 seconds. Step 2: Press NEXT to navigate to the Override menu. Step 3: Press ENTER to enter the Override menu.

Step 4: Select Manual Override to Hand.

Step 5: For hydronic systems, set System Pump to On. The system pump should now be operating.

Step 6: Set Heat Relay to On. The boiler or electric heating cables should start heating.

Step 7: For modulating boilers change the Boiler Percent from 0 to 100%. The boiler should be firing.

Step 8: 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.

Step 9: Select the Override Time after which the control resumes normal operation.

Step 10: Exit the Manual Override by selecting Auto.

Manual Override - Maximum Heat

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.

Step 1: Press and hold the Home button for 3 seconds. Step 2: Press NEXT to navigate to the Override menu. Step 3: Press ENTER to enter the Override menu.

Step 4: Select Manual Override to Max.

Step 5: Select the Maximum Heat Time after which the control resumes normal operation.

Step 6: Exit the Manual Override by selecting Auto.

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.

Step 1: Press and hold the Home button for 3 seconds. Step 2: Press NEXT to navigate to the Override menu. Step 3: Press ENTER to enter the Override menu.

Step 4: Select Manual Override to Test.

Step 5: Exit the Manual Override by selecting Auto.

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: Press and hold the Home button for 3 seconds. Step 2: Press NEXT to navigate to the Override menu. Step 3: Press ENTER to enter the Override menu.

Step 4: Select Manual Override to Purge.

Step 5: Select the Maximum Purge Time after which the control resumes normal operation.

Step 6: Exit the Manual Override by selecting Auto.

Manual Override - Off

The snow melting system can be manually turned off and the								Step 1:	Press and hold the Home button for 3 seconds.
control remains off until manually changed back to Auto. This								Step 2:	Press NEXT to navigate to the Override menu.
allows the installer or end user to permanently disable the snow								Step 3:	Press ENTER to enter the Override menu.
melting system without removing power from the control.								Step 4:	Select Manual Override to Off.
Switch Settings								Step 5: Exit the Manual Override by selecting Auto.
				Switch		Position	Action
1058-01	Lock
			Snow Melting Control 654				LOCK ACCESS LEVEL
Switch Settings	ON					ON	The control is locally locked and the access level cannot be changed.
			tekmarNet Electric or Hydronic Boiler/Mixing
	1 2		www.tekmarControls.com				Set to Lock when installation has been completed.
	Unlock Unused		Power: 24 V (ac) ±10%, 60 Hz, Class 2,
							UNLOCK ACCESS LEVEL
			Relays: 24 V (ac) 2 A, 3.5 A combined
			16 VA standby, 100 VA fully loaded
			Designed and assembled in Canada	1			The control is unlocked and the access level may be changed. Go to
H1220A			Meets Class B: ICES & FCC Part 15				the Toolbox menu to change the access level. Set to Unlock during
		Back of Control				OFF	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.
				2		ON	Not used
						OFF	Not used

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User Interface

Display

Status Field

Operation Field

Touch to turn system off while away

Touch to

Melt or Stop

Touch to adjust settings

Touch to display Run Time,

Outdoor & Slab Temperature

Touch to quickly enter the View menu

ENTER

Home

Button

Touch to go to the next setting

Home Button

Return to the Home Screen

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

Operation Field

MELT	System is melting snow or ice.
IDLE	System is idling.

STRM	System is in storm operation.
OFF	System is off.

Status Field

WWSD

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

CWCO Cold Weather Cut Out. Too cold to melt.

TIMED

Timed melting operation. System operates until time has elapsed.

WARM Slab is warming up to the melting temperature.

AWAY

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

PEND

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

WAIT

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

SENSOR Tandem 090 sensor.

TRACK This zone tracks the melting operation of zone 1.

Symbols

HEAT ON

Heat is turned on.

tekmarNet®

Communication is present.

WARNING SYMBOL

Indicates an error is present.

ARROWS

Adjust the displayed setting.

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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.

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.

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.

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.

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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
			User	SNOW ZONE
		1 to 12		The snow melt zone number on the tekmarNet®
			Installer	system.
				Conditions: tekmarNet® communication available.
				OUTDOOR
		– – –, -76 to		Current outdoor air temperature as measured by the local
			User	or remote outdoor sensor. The outdoor air temperature is
		149°F		shared to all devices in the tekmarNet® system. “– – –” is
		(-60 to 65°C)	Installer	displayed when no outdoor sensor is available.
				Conditions: Application Mode is set to PWM, Boil, Mix or
				Elec.
		– – –, -76 to		SLAB TARGET
			Installer	The calculated slab target of the snow melting system.
		149°F		“– – –” is displayed when the snow melt control is off.
		(-60 to 65°C)		Conditions: Application Mode is set to PWM, Boil, Mix or Elec
				and a snow/ice sensor or slab sensor is installed.
		-76 to 149°F	User	SLAB
				Current slab temperature as measured by the control.
		(-60 to 65°C)	Installer	Conditions: Application Mode is set to PWM, Boil, Mix or Elec
				and a snow/ice sensor or slab sensor is installed.
			User	WATER SENSOR
		DRY or WET		Current status of the water detection sensor.
			Installer
				Conditions: A snow/ice sensor or snow sensor is installed.
				BOILER TARGET
		---, 70 to 200°F		The calculated boiler target of the snow melt system.
			Installer	“– – –” is displayed when the snow melt control is not operating
		(21.0 to 93.5°C)
				the boiler.
				Conditions: Application Mode is set to Boil.
				MIX TARGET
		---, 70 to 200°F		The calculated mix target of the snow melt system. “– – –”
			Installer	is displayed when the snow melt control is not operating the
		(21.0 to 93.5°C)
				mixing valve or mixing injection pump.
				Conditions: Application Mode is set to Mix.
		-58 to 212°F		SUPPLY
			Installer	Current system supply temperature as measured by the
		(50.0 to 100.5°C)		control.
				Conditions: Application Mode is set to PWM, Boil or Mix.
				BOILER RETURN
		-58 to 212°F		Current boiler return temperature as measured by the
			Installer	control.
		(50.0 to 100.5°C)
				Conditions: Application Mode is set to PWM, Boil or Mix and
				Out/Bret Sensor is set to Bret (boiler return sensor).
				MIX RATE
		0 to 100%	Installer	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).
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View Menu (2 of 2)

Item Field	Range	Access	Description	Set to
			HEAT RELAY
		User	Current status of the heat relay. The boiler, pump or
	OFF or ON		electric cable is on when ON is displayed. The boiler,
		Installer	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
	0 to 100%	Installer	minute cycle.
			Conditions: Application Mode is set to PWM or Elec. Not
			visible when Manual Override is not Auto.
		User	SYSTEM PUMP RELAY
	OFF or ON		Current status of the system pump relay.
		Installer	Conditions: Application Mode is set to PWM, Boil or Mix and
			Auxiliary Relay is set to SYS (system pump).
			ALERT RELAY
	OFF or ON	User	Current status of the alert relay.
			Conditions: Application Mode is set to PWM, Boil or Mix and
		Installer
			Auxiliary Relay is set to ALRT (alert) or Application Mode is
			set to Elec.
			MANUAL MELT TIME
	00:00 to 24:00	User	When manually started, the display shows the remaining
			run time before shutting off.
	hours	Installer
			Conditions: Application Mode is set to PWM, Boil, Mix or
			Elec.
			ADDITIONAL MELT TIME
	00:00 to 6:00	User	When automatically started by a Snow/Ice Sensor 090
			or 094, the display shows the remaining run time before
	hours	Installer	shutting off.
			Conditions: Application Mode is set to PWM, Boil, Mix or Elec
			and a snow / ice sensor 090 or 094 is installed.

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© 2013

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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		MELTING
				Select the desired surface temperature of the snow melt
		(0.0 to 35.0°C)	User
		Default = 36°F	Installer	surface when melting.
				Conditions: Application Mode is set to PWM, Boil, Mix
		(2.0°C)
				or Elec.
				IDLING
				Select the desired surface temperature of the snow melt
		OFF, 20 to 95°F		surface when idling. Idling pre-heats the slab when the
		(-6.5 to 35.0°C)	Installer	slab is dry but cold and allows faster reaction time to reach
				the melting temperature. Recommended for commercial
		Default = OFF
				use only.
				Conditions: Application Mode is set to PWM, Boil, Mix
				or Elec.
				STORM
		OFF, 20 to 95°F		Select the desired surface temperature of the snow melt
		(-6.5 to 35.0°C)	Installer	surface while operating in the storm operation. Storm
		Default = 28°F		operation temporarily pre-heats the slab to allow faster
				reaction time to reach the melting temperature.
		(-2.0°C)
				Conditions: Application Mode is set to PWM, Boil, Mix
				or Elec.
		0:30 to 24:00		MANUAL MELT RUN TIME
				Select the amount of running time when manually starting
		hours	User
		Default = 4:00	Installer	the system.
				Conditions: Application Mode is set to PWM, Boil, Mix
		hours
				or Elec.
				ADDITIONAL MELT TIME
		0:00 to 6:00		Select the amount of additional melting time after the
				Snow / Ice Sensor 090 or 094 is dry. This allows low
		hours
			Installer	spots on the slab to fully dry before the snow melting
		Default = 0:00		system is shut off.
		hours		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.
		0:30 to 24:00		STORM RUN TIME
				Select the amount of storm run time to pre-heat the slab
		hours	Installer
		Default = 8:00		when advised of a winter storm warning.
				Conditions: Application Mode is set to PWM, Boil, Mix or Elec
		hours
				and Storm is set to a temperature.
		AUTO, MIN, -2,		WATER SENSITIVITY
		-1, MID, +1, +2,	Installer	Select how sensitive the Snow / Ice Sensor 090 or 094,
		MAX		or the Snow Sensor 095 is to water detection.
		Default = AUTO		Conditions: Snow / Ice Sensor is set to 090 or 095.
		AUTO, 32 to		WARM WEATHER SHUT DOWN
				Select the temperature at which to shut down the snow
		95°F
			Installer	melting system during warm weather. This allows the
		(0.0 to 35.0°C)		snow or ice to melt off the slab naturally.
		Default = AUTO		Conditions: Application Mode is set to PWM, Boil, Mix
				or Elec.
		OFF, -30 to 50°F		COLD WEATHER CUT OUT
				Select the temperature at which to shut down the snow
		(-34.5 to 10.0°C)	Installer
		Default = 10°F		melting system during extremely cold weather. Below
				this temperature, the heat loss of the slab exceeds the
		(-12.0°C)
				capacity of the boiler or heating appliance.
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