Danfoss GX 850ACP, GX 850M Installation guide

Danfoss

GX™ 850ACP/GX™ 850M

Installation Manual

Table of Contents

1: User Manual

System overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 General use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Menu system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Possible alarms during operation

Clogged drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Missing sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 New added sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Sensor malfunction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Changing parameters and performance of systems. . . . . . . . . . . . . . . . . . . . . . . . . . 8

Roof system . .	. . . . . . . . . . . . . . . .	. . . .	.	. . . . . . . . . . . . . . . . . . .	.	.	.	.	8
Ground system	. . . . . . . . . . . . . . . .	. . . .	.	. . . . . . . . . . . . . . . . . . .	.	.	.	.	9

2: Installer Manual

System overview . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	10
Placement . . . . . . . . . . . .	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11
Connection steps for system	. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	11

Specifications for GX 850ACP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Installation Diagram for GX 850ACP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Schematic Diagram for GX 850M. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . .	.	. .	14
Typical Applications for GX 850M. . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . .	.	. .	15
Part Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . .	.	. .	16
Installation steps for system/systems . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 17
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 17
Installation of roof system . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 18
Installation of ground system . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 19
Installation of combi system . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 20
Installation of dual system . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. . . . . . . . 22

Modification of System(s). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

3: Technical Speciﬁcation

Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	27
Factory settings (Roof system) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	28
Factory settings (Ground system) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	28

4:Appendix

A:Menu system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

B:How it works . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Roof system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	34
Ground system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	35
Security and energy consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	36
C: PSU and feeder cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	37
Ground system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	37
Roof system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	37

User Manual

System overview

The GX™ 850ACP/GX™ 850M system is capable of keeping outdoor areas free of ice and snow. The GX™ 850ACP/GX™ 850M can handle up to 2 independent areas, in any of the following combinations:

• Single roof system

To keep gutters, valley gutters and down pipes free of ice and snow, and to prevent ice dams from causing damage. It is also possible to use the roof system to reduce/remove the snow weight from a roof. (Roof system A)

• Single ground system

To keep areas like parking areas, paths, garage entrances, steps, ramps, roadways and bridges free of ice and snow. (Ground systems A)

• 1 ground system and 1 roof system

(combi system)

Consists of 1 single roof system A and 1 single ground system B.

A B

• 2 roof systems (dual system)

Consists of 2 x “Single roof systems (A and B)”.

• 2 ground systems (dual system)

Consists of 2 x “Single ground systems (A and B)”.

A B

User Manual

When more than 1 area is controlled by the GX™ 850ACP/GX™ 850M system, it is also possible to prioritize the areas. Prioritizing makes it possible to operate 2 areas, even if the required power for 2 areas is not present.

The GX™ 850ACP/GX™ 850M is fully automatic and operated digitally by means of the intelligent sen-sors located in the heated terrain. Each sensor measures both temperature and mois-ture, and the system turns the heating elements on and o based on these readings. By combining moisture and temperature readings, the system is able to save around 75% energy compared to systems which only measure temperature readings. The digital sensors used for the GX™ 850ACP/GX™ 850M also provide the most exact readings when compared with corresponding analogue systems. The result is optimum functionality and low energy consumption.

A typical installation consists of:

•Controller unit (only one)

This is the device which, based on the measurements from the sensors, decides when to heat the connected area(s).

•Power supply (one or more)

The power supply delivers power to the controller unit and the connected sensors.

•Ground sensor (one or more)

At least 1 ground sensor is needed for each ground area, but to get the best performance of a system, 2 or more sensors are recommended. For more information please refer to the sensor manual.

•Roof sensor (one or more)

At least 1 roof sensor is needed for each roof area, but for complex roof constructions, 2 or more sensors are recommended.

For more information please refer to the sensor manual.

For more information about the ice and snow melting function of the GX™ 850ACP/GX™ 850M, please refer to: Appendix B: “How it works”.

User Manual

General use

The GX™ 850ACP/GX™ 850M is operated via 3 buttons and an alpha numeric display capable of dis-playing information in various languages.

Buttons

The functions of the 3 buttons are:

Info	Shows additional information / help (only active when lit)
Next	Next menu entry / next line / next letter

Enter rmConﬁ/ select

Besides the normal function of the buttons, some special combinations are important to the user:

Return to home:

Return to home of menu system

Master reset:

Restore factory defaults AND delete installed systems.

(In case of unsolvable problems due to a wrong choice of language, etc.)

Hold for 2 seconds:

Hold for 8 seconds:

Display

The following icons have a special meaning:

This animated icon is shown, when the system is heating.

If icon is blinking the system wants to heat, but is paused (system has low priority)

This icon is shown, when the system has detected moisture, and the temperature is above the melting temperature.

This icon is shown, when the system has detected snow or ice, and the temperature is below the melting temperature.

The GX™ 850ACP/GX™ 850M can simultaneously control up to 2 di erent systems. These 2 systems are referred to as System A and System B. The GX™ 850ACP/GX™ 850M gives the user the opportu-nity to view the current status of the systems. The status can be shown in 2 di erent ways.

User Manual

Combined view (default):

The combined view shows the status of both systems at the same time. System A is shown on the upper display line, and System B is shown on the lower display line.

This view gives the user a quick overview of all the systems.



Flipped view:

The ﬂipped view shows the status of one system at a time. The status of each system is shown for 5 seconds.

This view gives the user more detailed information about each system.



The user can always press	to get more information about the current status
irrespective of view selected.

Menu system

The menu system is navigated by the keys

and

No matter if the GX™ 850ACP/GX™ 850M controls one or two systems, the look and use of the menu system is always the same. This is obtained by making the entry to each system in the main menu. The possibili-ties and settings for each system are ﬁ rst accessible after the user has selected the desired system.

To the right is given an example of the main menu and the menus for System A and System B.

A:Roof	˜
B:Ground	¯ˆı
			5s
A:Roof	˜			B:Ground	¯ˆı
ÚStandby			5s	ÚMelting
			5s
Select system		A:		View and set
Roof				operating mode
					S ys tem
				View sensor	A
				View sensor
				measurements
Select system		B:		View and set
Ground				operating mode

S ys tem

View sensor measurements

Only vis ible when S ys tem B is ins talled!

View alarm menu

Please notice, that only a few of the menus for each system are shown!

For a complete overview of the menu system, please refer to: Appendix A: “Menu system”.

User Manual

Possible alarms during operation

Clogged drain

Description:	When clogged drain warning has been enabled, the system constantly has
	been detecting moisture for 14 days.
	If the GX™ 850ACP/GX™ 850M controls more than 1 system, and
	prioritizing has been enabled, the time before clogged drain
	warning for the down-prioritized system, can be much longer. The
	time is only updated when the system actually is allowed to heat
	the area (e.g. the higher priority system is not heating).

Solution:	- Check gutter and down pipes for any obstacles preventing the melting
	water to ﬂow away.
	- Check if sensors are covered with dirt.

Missing sensor

Description:	When the connection to a sensor is lost, the GX™ 850ACP/GX™ 850M alerts the user. At the
	same time the GX™ 850ACP/GX™ 850M automatically switches the system to “Constant O ”
	mode, and user interaction with the GX™ 850ACP/GX™ 850M is needed.

Solution:	- Acknowledge error and go to “Installer Site” in the menu system and
	select “Change System”.
	- Contact your local installer to get a replacement.

New sensor added

Description:	When a new sensor is added, the GX™ 850ACP/GX™ 850M alerts the user
	and at the same time automatically switches to “Constant O ” mode. User
	interaction is needed in order to correct the error.

Solution:	Acknowledge error and go to “Installer Site” in the menu system and select
	“Change System”.

Sensor malfunction

Description:	When something is wrong with the readings from connected sensors to
	the GX™ 850ACP/GX™ 850M, an alarm is raised.
	Not all error prone sensors can be discovered using this feature!

Solution:	- Acknowledge error and go to “Installer Site” in the menu system and
	select “Change System”.
	- Contact your local service centre to get a replacement.

User Manual

Changing parameters and performance of systems

Several parameters for each system can be changed during and after the installation. For a complete understanding of how these parameters a ect the performance of the roof and ground system, please refer to Appendix B: “How it works”.

Onlychangethe GX™ 850ACP/GX™ 850M parameters if you are aware

of the e ects of your actions.

Reference: Appendix A: Installer menu

Roof system

Melting temperature

Changing the melting temperature will a ect when the system is activated in case of moisture and low temperatures.

The factory setting is 35 °F (1.5°C).

This means that the heating system will be activated if the temperature falls below 29 ° F (1.5°C) and moisture is detected.

Moisture level

The “moisture level” decides when the system detects moisture.

The factory setting is 50 (on a scale from 5 to 95).

The lower the setting, the more sensitive the system is to moisture.

Post-heat

Once the sensor has detected that the roof/gutter is dry and free of ice and snow the system will keep heating for another hour (default). If you wish to increase/decrease this time see capital A: Installer menu.

The factory setting is 1 hour (on a scale from 0 to 9 hours)

Priority

When using the GX™ 850ACP/GX™ 850M as a dual or combi system, it is possible to prioritize the sys-tems. When the priority of 2 systems is equal, both systems can heat at the same time. If the priority of the 2 systems di ers, and both systems want to heat, only the system with the highest priority is allowed to heat.

The factory setting is 1 (highest priority) for all systems.

Clogged drain

It is possible to enable and disable the “Clogged drain warning”.

The factory setting is “Warning On”.

System and sensor name

It is possible to change the names of the system and connected sensors (see capital A: 8 Installer menu.

User Manual

Ground system

Melting temperature

Changing the melting temperature will a ect when the system is activated in case of moisture and low temperatures.

The factory setting is 39°F (4°C).

This means that the heating system will be activated if the temperature falls below 4°C and moisture is detected.

Standby temperature (maintained ground temperature)

The higher the standby temperature the faster the system will be able to melt ice and snow.

On the other hand the higher the standby temperature the higher the running costs. So, determining the standby temperature is a trade-o between fast melting or low running costs. The factory setting is 27°F (-3 C°).

Moisture level

The “moisture level” decides when the system detects moisture.

The factory setting is 50 (on a scale from 5 to 95).

The lower the setting, the more sensitive the system is to moisture.

Post-heat

The factory setting is 1 hour (on a scale from 0 to 9 hours)

Priority

The factory setting is 1 (highest priority) for all systems.

Clogged drain

It is possible to enable and disable the “Clogged drain warning”.

The factory setting is “Warning On”.

System and sensor name

It is possible to change the names of the system and connected sensors.

Installer Manual

System overview

The GX™ 850ACP/GX™ 850M can handle up to 2 independent areas, in any of the following combinations:

•Single roof system

(1 system, 1-4 roof sensors)

•Single ground system

(1 system, 1-4 roof sensors)

•1 ground system and 1 roof system (combi system)

(2 systems, 2-4 sensors total, minimum 1 sensor per system)

•2 roof systems (dual system)

(2 systems, 2-4 sensors total, minimum 1 sensor per system)

•2 ground systems (dual system)

(2 systems, 2-4 sensors total, minimum 1 sensor per system)

When more than 1 area is controlled by the GX™ 850ACP/GX™ 850M system, it is also possible to prioritize the areas. Prioritizing makes it possible to operate 2 areas, even if the needed power for 2 areas is not present.

A typical ice and snow melting system consists of:

•GX™ 850M

•Only 1 GX™ 850ACP/GX™ 850M is allowed on the Devibus™

•Power supply

•More power supplies can be connected in parallel (if needed)

•Be aware of maximum number of sensors on each power supply (Refer to Technical Speciﬁcation for power demand of sensors)

•Ground and/or roof sensor(s)

•Be aware of maximum number and cable length of sensors on each power supply (Refer to sensor manual for a more detailed description)

Installer Manual

Placement

The GX™ 850ACP/GX™ 850M and power supply are designed for DIN rail mounting. When mounting please be aware of the following conditions:

The GX™ 850ACP/GX™ 850M is designed and approved to operate in the temperature range 14°F ( -10°C) to 104°F (40°C).

The GX™ 850ACP/GX™ 850M is only NEMA 1 protected, thus not water resistant.

The installer must ensure proper enclosure of the GX™ 850ACP/GX™ 850M according to national standards (electrical safety).

Connection steps for system

Only authorized personnel is allowed to install the GX™ 850ACP/GX™ 850M.

When wiring up the GX™ 850ACP/GX™ 850M and sensors, please be aware of the following conditions:

When the GX™ 850ACP/GX™ 850M is used in a dual system configuration, it is preferable that each sensor bus (Devibus™) can be connected and disconnected via switches. During the installation of a dual system, each system must be con-nected one at a time.

Be aware of maximum allowable power drain from power supply to sensors.

Below is shown the recommended order of the installation. Please refer to Figure A for connection of GX™ 850ACP/GX™ 850M and refer to Figure B-G for a guideline to connect the heating elements to GX™ 850ACP/GX™ 850M.

1.Connect heating cables to the GX™ 850ACP/GX™ 850M

•Please notice that a single system ALWAYS uses the System A output relay

•When using external power relay, please refer to the connection diagrams.

2.Connect the power supply to the GX™ 850ACP/GX™ 850M

•Do not connect the power supply to mains yet

3.Connect sensors to the Devibus™

•When used as a dual system, only the sensors for System A can be connected. For connection of System B please refer to chapter: “Installation of dual system”.

4.Connect the power supply to mains.

InstallerUser ManuManual

Specifications for GX™ 850ACP

Voltage:	120V
Max. Load:	100A
Enclosure Type:	NEMA 4X
Mounting:	Wall mounted, indoors
Dimensions (HxWxD):	10 .5” x 2 .5” x 7
Warranty:	2 Years

Provides a complete, efficient snow melting solution.

Requires ground or gutter sensors.

Schematic Diagram

.he GX™ 850ACP has an integral alarm function that monitors the attached sensors and the in-built microprocessor. An external alarm may also be connected to the system.

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