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Table of Contents
Related Manuals for Danfoss DHP-R 7Ua
Summary of Contents for Danfoss DHP-R 7Ua
- Page 1 user’s manual COnTrOl sYsTem DHP-r...
- Page 2 2 – Danfoss...
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Page 3: Table Of Contents
3.6.3 Extra heater ....................24 6 list of alarms ������������������������������������������������������ 39 3.6.4 Heat stop ....................24 3.6.5 Brine control ..................25 7 Digital inputs and outputs �������������������������������� 41 3.6.6 Hot water ....................25 3.6.7 WCS ......................26 8 menu overview ��������������������������������������������������� 43 3.6.8 TWC ......................26 Danfoss – 3... - Page 4 4 – Danfoss...
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Page 5: Introduction
Internet from any computer with a web browser. With the web interface unlocked it is also possible to receive alarms from the controller by e-mail. Danfoss – 5... - Page 6 6 – Danfoss...
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Page 7: Functional Description
The integral value is calculated by adding the difference between the primary supply temperature and the set point to the integral every minute. The integral Danfoss – 7... -
Page 8: Auxiliary Heater
The burner must have its own control system and be capable of ge- nerating a constant high water temperature. The signal Block. extra heater can be used to turn off the burner completely. The analogue signal Extra heater 8 – Danfoss... - Page 9 A district heating system will usually not need the signal Block. extra heater, but it is still available. The blocking is lifted when the integral passes the auxi- liary heater start limit, and is blocked again when it rises above the start limit for the last heat pump. Danfoss – 9...
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Page 10: Seasonal Stop
Zero deviation in the curve Curve room temp feedback corresponds to a perfect room temperature. It is a good idea to not have any curve adjustment for deviations close to zero, in order to avoid self excitation. 10 – Danfoss... -
Page 11: Temperature Limits And Forced Starts And Stops
The factory setting is that hot water production is stopped when the opera- ting pressure switch is triggered. This setting can be changed so that it instead stops when a temperature limit is reached. Danfoss – 11... -
Page 12: System Settings
Wcs ctrl start delay. The set point for the charger temperature is defined in the setting Wcs set- point. The controller is a PD-controller with the controller parameters Wcs p- area and Wcs d-factor. 12 – Danfoss... -
Page 13: Final Hot Water Heater With Twc
If a flow guard is activated there is an alarm with an adjustable delay that stops the pump on error. If the pressure guard is selected a choice can be made whether the alarm should stop the pump or not. Danfoss – 13... -
Page 14: Brine Monitoring
While stopped the circulation pump is exercised at regular intervals. 2�4�2 Curve with seasonal stop Curve with seasonal stop is the same functionality as is used in the outdoor compensated curve, but with the difference that it uses the master heat pump’s 14 – Danfoss... -
Page 15: Constant Heat
The energy from the cooling tank is transported to the bore hole. A prerequisite for passive cooling to work is that the brine temperature is lower Danfoss – 15... -
Page 16: Surplus Heat Dumping
The surplus chiller is activated by the Config cooling setting. If the surplus chilleris used, a PI-controller is used to control cooling fans, with settings for set point, P-area, and I-time. 16 – Danfoss... -
Page 17: The Cooling Circuit Controller
Another limit blocks passive cooling. When passive cooling is blocked, the cooling circuit controller and circulation pump are stopped. The circulation pump is exercised at regular intervals. Danfoss – 17... - Page 18 18 – Danfoss...
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Page 19: Using The Controller
WM HPC is restarted. 3�2 menus On the top level there are 11 menus that you can scroll through using the left and right arrow keys. In the controller for a slave pump there are fewer menus. Danfoss – 19... -
Page 20: Alarms
One alarm at a time is displayed in chronological order, with the most recent displayed first. Change the displayed alarm using the up and down arrows. Alarms are first noted in the list when they become active, and 20 – Danfoss... -
Page 21: Operation Mode
The menu Settings has sub menus with settings for different parts of the sys- tem. In a slave pump controller there are only heat pump settings, but the master has much more. These settings are briefly explained below. Danfoss – 21... - Page 22 Pressure/flow guard This setting tells the control system whether the brine flow is monitored using a flow guard or a pressure guard. 22 – Danfoss...
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Page 23: Heating
Setting that determines how much the integral is allowed to sink between starts of additional heat pumps. start extra heater Determines, after all the heat pumps have been started, how much the inte- gral is allowed to sink before the extra heater is allowed to start. Danfoss – 23... -
Page 24: Extra Heater
3�6�4 Heat stop Heat stop limit Outdoor temperature limit for blocking heat production. Heat stop hyst This setting determines how much below the stop limit the outdoor tempera- ture must fall for the heat production blocking to be lifted. 24 – Danfoss... -
Page 25: Brine Control
Stop limit. stop limit Temperature limit for when hot water production should stop, for the heat pumps not set to stop when the control presostat is triggered. Top up function Activation and deactivation of the top up function. Danfoss – 25... -
Page 26: Wcs
Delay time for starting the heater due to low hot water recirculation return temperature. alarm limit TWC out Temperature limit for the low outlet temperature alarm. alarm delay TWC out Alarm delay for the low outlet temperature alarm. 26 – Danfoss... -
Page 27: Shunt Groups
24 hour period when stopped due to the outdoor tempera- ture limit. 3�6�10 Cooling The first element in the menu for cooling is the setting Config cooling, which determines the cooling module’s operation mode. Below this are sub menus for settings regarding cooling subsystems. Danfoss – 27... - Page 28 Pump exercise interval for the cooling circuit circulation pump. Pump exerc� time This setting determines how long the pump is run when exercised. 3�6�10�3 Blocking active block limit Outdoor temperature limit for blocking active cooling. Below this temperature active cooling will not be used. 28 – Danfoss...
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Page 29: Manual Override
This menu is used to install and uninstall expansion modules. Every type of expansion module has its own sub menu. All connected and working modules are listed under respective menu. In these menus they are identified using the serial number. The serial number is printed on each module. Danfoss – 29... -
Page 30: Slave Pumps
3�8�2 menu navigation This setting turns menu navigation on and off. When active, a menu code is shown for every menu when navigating the operator panel. This code tells you where in the menu tree you currently are. 30 – Danfoss... -
Page 31: Clock
This menu contains a command to restart the heat pump controller system without an interruption in power. 3�8�9 Factory settings This menu contains a command to reset all settings to factory default. The password and network settings are left unchanged. Danfoss – 31... -
Page 32: Local Backup
Step down to the language setting and press OK. When the text is blinking use up and down arrow keys to select language, and then press OK again. Clear alarm log Removes all the alarms in the alarm log. 32 – Danfoss... -
Page 33: Commissioning
This is also true for the cooling module HPC-CM. If the power LED is blinking this means that the module has power, but cannot communicate with the master. This is the case for example during the time the master is booting after a power reset. Danfoss – 33... -
Page 34: Cooling
Select an output, set the desired manual value and then select that it should be run manually. The output assumes the set value until changed back to auto. To prevent outputs from unintentionally being left in manual override mode an output will automatically revert to auto mode after 30 minutes. 34 – Danfoss... -
Page 35: 4�3 Starting The Controller
When the system is finally up and running, some work still remains. There is a sliding grade from working to optimal performance, and the process of get- ting closer to optimal performance involves fine tuning. The factory default Danfoss – 35... - Page 36 In summary, there is some fine tuning to do. Much can be done when com- missioning, but some things that are weather dependent cannot be optimised until the weather is there. Fine tuning will get you better comfort and smaller energy bills. 36 – Danfoss...
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Page 37: External And Superior Control Systems
The WM HPC still manages the protective alarms ant timeouts, and will ensure that the heat pump will not start again until it has been standing still for at least five minutes after a stop. Danfoss – 37... -
Page 38: 5�4 The Sum Alarm Relay Output
The heat pump control system has an alarm output that sends out 24 VAC as soon as any A or B alarm is active. This signal can be used to send information to a superior control system. 38 – Danfoss... -
Page 39: List Of Alarms
A power failure on 24 VAC has occurred. Communication master Communication with the master pump has failed. High brine in temp The incoming brine temperature is too high. The alarm is part of the brine control function. Danfoss – 39... - Page 40 A fault in the cooling tank outlet temperature sensor has been detected. Sensor cooling circ. A fault in the cooling circuit temperature sensor has been detected. Slave pump missing Communication with one or several slave pumps has stopped working. 40 – Danfoss...
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Page 41: Digital Inputs And Outputs
DIGITal In usage High comressor current High pump current Control pressostat Högtryckspressostat Lågrtryckspressostat Flowsensor Discharge pipe temp External brine start DIGITal OuT usage Start/stop compressor Start/stop brinepump Start/stop rad.pump Channel 36 Block. extra heater Sum alarm System pump Danfoss – 41... - Page 42 42 – Danfoss...
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Page 43: Menu Overview
8 menu overview Danfoss – 43...