How it Works
Danfoss
Loading...
A
Loading...
Loading...
Akva Vita TDP-F
Data sheet [de]
6 pgs323.14 Kb0
Operating guide
20 pgs4.59 Mb0
Operating guide [de]
11 pgs2.07 Mb0

Danfoss Akva Vita TDP-F Operating guide

Download
MAKING MODERN LIVING POSSIBLE
Danfoss District Energy
Akva Vita TDP-F
Instructions for installation and use
Instructions for installation and use Akva Vita TDP-F
1.0 Contents
5.0 Installation instructions, Safety and Handling ..............................................................................................................................................................6
6.0 Installation instructions, Getting started ........................................................................................................................................................................ 7
9.1 Maintenance schedule (recommendations) ....................................................................................................................................................... 13
10.1 Troubleshooting - Heating ....................................................................................................................................................................................... 14
10.2 Troubleshooting - Domestic hot water ................................................................................................................................................................ 15
2
DKDHR VI.IQ.G1.12 Danfoss District Energy
Instructions for installation and use Akva Vita TDP-F
2.0 Product introduction - Akva Vita TDP-F, project model - Type 145B4034
2 Plate heat exchanger DHW
4 Dierential pressure controller
6 Non-return valve
7 Ball valve
23 Sensor pocket for heat meter
24 Fitting piece for heat meter
38 PM controller
52 Zone valve VMT/TWA-V
Please note:
Your substation may look dierent than the substation shown, as variants with other components may be supplied. The control function, however, is basically as stated in this instruction manual.
Instructions for the tted components will be supplied together with the substation.
38
24
2
52
6
23
DH
DH
Supply
Primary Secundary
DCW
Return
DHW
Domestic water
HE
Supply
HE
Return
4
7
Danfoss District Energy VI.IQ.G1.12 DKDHR
33
Instructions for installation and use Akva Vita TDP-F
3.0 Enduser instructions, General
Instructions
Please read these instructions carefully. The manufacturer accepts no liability for loss or damage resulting from failure to comply with these instructions. Read and follow these instructions carefully to prevent the risk of physical injury and/or damage to property. Exceeding the recommended operating pa­rameters appreciably increases the risk of personal injury and/or damage to property.
Installation, commissioning and maintenance must be carried out by qualied and authorised personnel (both plumbing and electri­cal work). Once the station has been installed and is operating, there is nor- mally no need to alter the settings or other functions. The district heating substation is very reliable and easy to operate.
If necessary, you can change the temperature settings as described on page 5. For more detailed information about the substation, see the sections concerning installation and commissioning.
Description
These instructions apply to substation types Akva Vita TDP-F, which are district heating substations for direct heating for single-family, semi-detached and terraced houses as well as ats. With one heat­ing circuit and instantaneous water heater for domestic hot water heating.
Akva Vita TDP-F substations are tted with a dierential pressure con­troller that maintains a constant pressure in the heating circuit(s). The supply temperature to the radiators is always identical to the district heating supply temperature. The room temperature is adjusted solely using the radiator thermostats.
Irregularities
When reading the meters, check all joints and connections for leaks.
If you identify any irregularities/leaks, contact your professional provider for assistance. Check the troubleshooting section before contacting your professional provider.
Warning! Hot surfaces
Parts of the substation may be very hot and can cause burn in­juries. Be very careful when you are in the immediate vicinity of the unit.
Warnings about high pressure and high temperature
The maximum supply temperature in the district heating net­work can be up to 90°C and the operating pressure can be up to 10 bar. This may result in a risk of scalding from touching the substation and from outow of the medium (water/steam). Ex­ceeding the substation design data and operating parameters for pressure and temperature carries an appreciable risk of personal injury and/or damage to property.
Emergencies
In the event of re, leaks or other hazards, immediately shut o all sources of energy to the substation, if possible, and call for appropriate assistance. If the domestic hot water is discoloured or malodorous, shut o all ball valves on the substation notify all users and call for profes­sional assistance without delay.
We recommend regular inspections of the substation - ideally in connection with readings of the district heating meter. Pay special attention to any leaks and an excessively high return temperature in the district heating circuit (poor cooling of the district heating water). Cooling – i.e. the dierence between the supply and return temperature of the district heating water – has a signicant ef­fect on the overall economy. Therefore, it is important to focus on the supply and return temperature in the heating system.
The dierence should typically be 30–35°C in systems that operate with radiators. In systems that feature oor heating, the dierence is typically 5–10°C. In these systems, it is important that the supply temperature does not exceed 35°C. Please note that a low district heating return temperature is directly dependent on the return temperature from the heating/oor heating circuit and the return temperature of the domestic hot water recircula tion (in systems with domestic hot water recirculation). It is therefore important to focus on these return temperatures.
Cooling from the water heater alone:
During tapping, the level of cooling will typically be 30–35°C. When domestic hot water is not being tapped, it is completely normal for the return temperature from the water heater to rise slightly. In this situa­tion, the district heating meter will register very modest consumption as the volume of water is very small. On substations with recirculation, the heat meter registers the heat loss in the recirculation pipe.
-
4
DKDHR VI.IQ.G1.12 Danfoss District Energy
Instructions for installation and use Akva Vita TDP-F
4.0 Enduser instructions, initial adjustment/setting
Domestic hot water control
The DHW temperature is controlled by a proportional valve – the PM controller. The DHW temperature control is realized by turning the lever towards the red (hot) or blue (cold) mark. The temperature should be set to 45-48 °C at normal use (7-8 l/min). The temperature should never exceed 55 °C to avoid lime scale precipitation in the heat exchanger. If it is not possible to set the temperature according to the above rec­ommendations, it is recommended to change the standard controller setting.
PM controller
The PM controller can operate in three basic settings:
- High
- Standard – default
- Low Approximate setting of PM controller is dependent on district heating supply temperature and Δp:
Fig. 1
Disposable dierential pressure Δp (bar):
60 - 70 °C low low standard
70 - 80 °C low standard standard
80 - 90 °C low high high
Setting changes:
- dismount lever by using the attached Allen wrench,
- remove plastic cap,
- mount lever again and turn it:
- 1 rotation clockwise – high,
- 1 rotation counter – clockwise – low,
- mount cap and lever again.
Heating circuit, Dierential Pressure Controller
The dierential pressure controller (Fig. 2) reduces the high, uctu­ating pressure in the district heating network to a constant operat­ing pressure. The dierential pressure controller is initially set by the plumber in connection with the commissioning of the substation. If disruptions to the operation occur: noise in the radiator thermo­stats or poor regulation capacity, it may be necessary to reset the dierential pressure controller to a lower or higher operating pres­sure. We suggest that you contact your local plumber for assistance.
Disposable dierential
pressure Δp (bar):
0,2 - 0,5 0,5 - 1,0 >1,0
Fig. 2
Heating circuit, temperature control
The room temperature is regulated exclusively using the radiator thermostats
Thermal actuator TWA-V + 2-way seated valve VMT
On the secondary side the substation is supplied with a thermal ac­tuator TWA-V and 2-way seated valve VMT 15/8 (Fig. 3). The TWA-V is mounted on the VMT 15/8 and together with a room thermostat the TWA-V is used for ON/OFF control of the heating system.
The actuator is equipped with a visual position indicator to show the open or closed position of thev alve.
Danfoss District Energy VI.IQ.G1.12 DKDHR
Fig. 3
Thermal actuator TWA-V
2-way seated valve VMT 15/8.
55
Instructions for installation and use Akva Vita TDP-F
5.0 Installation instructions, Safety and Handling
Instructions
Please read these instructions carefully before installing and comis­sioning this substation. The manufacturer accepts no liability for loss or damage resulting from failure to comply with these instructions for use. Read and follow these instructions carefully to prevent the risk of physi­cal injury and/or damage to peroperty. Exceeding the recommended operating parameters considerably increases the risk of personal injury and/or damage to property. Installation, commissioning and maintenance must be carried out by qualied and authorized personnel in compliance with the local safety regulations.
Once the station has been installed and is operating, there is normally no need to alter the settings or other functions. The district heating substation is very reliable and easy to operate.
Connection
It must be possible to cut o all energy sources to the unit - includ­ing electrical connections - at all times.
Potential equalization/grounding
Potential equalization is an electrical equalizing connection to se­cure against user contact with dangerous voltage, which may occur for example between two piping systems. Potential equalization re­duces corrosion in heat exchangers, water heaters, district heating substations and plumbing installations. Equalization of potentials should be eected according to local regulations.
Energy source
The substation is primarily designed for connection to district heating. Alternative energy sources can be used if the operating conditions are equivalent to district heating at all times.
Application
The substation is designed only to operate with water or a water-glycol mixture (up to 40%), and other heating media may not be used. The substation is to be connected to the household piping in a frost-free room, where the temperature does not exceed 50 °C and the relative humidity is not higher than 80%. The substation must no be covered, bricked in or otherwise cut o from access.
Choise of materials
Only use materials, that comply with local regulations.
Corrosion
The maximum chloride compounds of the medium must not be higher than 300 mg/l. The risk of corrosion increases considerably if the recom­mended chloride content is exceeded.
Safety valve(s)
Installation of safety valve(s) must always be in compliance with local regulations.
Noise level.
≤ 55 dB.
Storage
Before installation, the units must be stored in a dry, heated (i.e. frost­free) room. (Relative humidity max. 80% and storage temperature 5-70 °C).
The units must not be stacked higher than the limit at the factory (max. 8 layers) Units supplied in cardboard packaging must be lifted using the handles incorporated in the packaging. Units must be placed on pallets for transport/moving across large distances. As far as possible, do not lift the substation by the pipes. Lifting by the pipes may cause leaks. REMEMBER to retighten.
Disposal
Dispose of the packaging in accordance with the local regulations for disposal of used packaging materials.
The substation is made of materials that cannot be disposed of together with household waste. Close all energy sources and disconnect all connection pipes. Disconnect and dismantle the product for disposal in accordance with the applicable local regulations for the disposal of the individual components.
Warning! Hot surfaces
Parts of the substation may be very hot and can cause burn inju­ries. Be very careful when you are in the immediate vicinity of the substation.
Warning of high pressure and high temperature
The maximum supply temperature in the district heating network can be up to 90°C and the operating pressure can be up to 10 bar. This may result in a risk of scalding from touching the substation and from outow of the medium (water/steam). Exceeding the substation design data and operating parameters for pressure and temperature carries an appreciable risk of personal injury and/or damage to property.
Emergencies
In the event of re, leaks or other hazards, immediately shut o all sources of energy to the substation, if possible and call for appropri­ate assistance. If the domestic hot water is discoloured or malodorous, shut o all ball valves on the substation, notify all users and call for professional assistance immediately.
Warning of damage during transport
On reception of the substation, and before installing it, check for any evidence of damage during transport. The substation must be handled and moved with the greatest care and attention.
IMPORTANT - Tightening of connections
Before adding water to the system, ALL pipe connections MUST be retightened, as vibrations during transport may have caused leaks. Once the substation has been lled and the system has been put into operation, ALL pipe connections MUST be tightened once more.
(Do not overtighten! - See page 8, Test and Connections)
Handling
We recommend that you wear suitable safety footwear while handling and installing the substation.
6
DKDHR VI.IQ.G1.12 Danfoss District Energy
Instructions for installation and use Akva Vita TDP-F
6.0 Installation instructions, Getting started
Connect the substation to the household piping in accordance with the labelling at the bottom and/or in accordance with the instruc­tions in this manual.
GETTING STARTED is a quick guide and some details in connection with installation and commissioning may require additional information, which can be found elsewhere in this instruction manual.
Commissioning:
Please note that the “getting started” quick guide presupposes that shutt-o possibility is established to and from the substa­tion. - We recommend mounting of ball valves.
1. The substation is prepared for wall mounting. Mount the sub­station on a solid wall using two sturdy bolts, screws, expan­sion bolts or similar.
2. Make sure that the ball valves are closed, when connnecting them to the household piping.
3. Mount the district heating meter (see page 8).
4. IMPORTANT! Tighten all pipe connections, as they may have loosened during transport and handling.
5. On systems that feature a safety valve, establish a drain con­nection in compliance with the applicable legislation.
6. Open the ball valve for the HE supply and return ow and ll the system with water by carefully opening the ball valve for the dis­trict heating supply ow and at the same time venting the system. Finally, open the ball valve for the district heating return ow.
7. Check the substation and the household piping thoroughly for leaks.
8. Pressure test the entire system for leaks in accordance with the applicable regulations.
09. Connect pump and automatic components, if any, to the elec­tricity supply, but do not switch on the power.
10. Heat the system and vent the radiator circuit/heating side thoroughly on the radiators and the air valve, if any.
11. For TDP-F stations, which include zone valve, remember to re­move the red split on the position indicator of the zone valve.
12. Now switch on the pump and automatic components, if any.
13. Finish by adjusting the substation in accordance with this instruction manuals.
Heating and cooling of the system may cause leaks. Therefore it may be necessary to retighten the connections in the period after commissioning.
Danfoss District Energy VI.IQ.G1.12 DKDHR
77
Instructions for installation and use Akva Vita TDP-F
7.0 Installation instructions, general
The installation, connection and maintenance of the substation must be performed by qualied and authorised personnel. Installation must always be performed in accordance with the ap­plicable legislation and in compliance with these instructions. The substation must be installed so that it is freely accessible and can be maintained without unnecessary disruption. Lift the substation by its mounting plate/rear section and secure it to a solid wall using 2 sturdy bolts, screws or expansion bolts positioned in the two key­holes in the mounting plate/rear section. Before commissioning, rinse all the pipes in the household piping system thoroughly to remove any impurities, and check and clean the dirt strainers in the substation. Connect the substation to the household piping in accordance with the labelling at the bottom and/or in accordance with the instruc­tions in this manual.
Test and connections
Before lling the system with water, retighten all the pipe connections because vibrations and shocks during transport and handling may have caused leaks. Once the system has been lled with water, tighten all the pipe connections once more before performing pressure test for leaks. After heating of the system, check all the connections and retighten if necessary. Please note that the connections features EPDM rubber gaskets! Therefore, it is important that you DO NOT OVERTIGHTEN the union nuts. Over-tightening may result in leaks. Leaks caused by over-tightening or failure to retighten connections are not covered by the warranty.
Heat meter, tting pieces.
The substation is equipped with tting pieces for heat meter on the district heating return line.
Fitting of heat meters
- Close the ball valves on the district heating and the heating sides.
- Loosen the union nuts at both ends of the tting piece and remove it.
- Fit the heat meter, - remember to insert gaskets.
- Mount sensor, - remember to insert gaskets.
- After mounting of heat meter remember to check and tighten
all pipe connections before commissioning the substation.
The heat meter consists of ow meter, two temperature sensors for mounting in DH supply and return and a microprocessor calculator for the calculation of energy consumption. On the LCD display of the calculator the energy consumption can be read.
8
DKDHR VI.IQ.G1.12 Danfoss District Energy
Instructions for installation and use Akva Vita TDP-F
088R0248| 15.12.2005 | Version 03
INSTRUCTIONS
VI.SB.H3.02 12-2005
Mounting of temperature sensors
As standard the heat meter is supplied with temperature sensors for measuring the supply and return ow temperatures.
The Akva Vita TDP-F at station is prepared for mounting of tem­perature sensors with M10x1 connection (see photo to the right):
The supply ow sensor is mounted in the sensor pocket on DH supply (pos A.)
- demount M10 plug (Pos. A)
- insert one temperature sensor in the sensor pocket
- tighten temperature sensor union nut
Mount the return ow sensor in the heat meter housing (pos. B).
Zone valve VMT + thermal actuator TWA-V The Akva Vita TDP-F is supplied with a zone valve VMT/thermal ac­tuator TWA-V, which enables connection to an electronic program-
mable room thermostat.
A
B
The TWA-V is mounted on the VMT zone valve and together with a room thermostat the TWA-V is used for ON/OFF control of the heat­ing system. The thermal actuator is switched on by an external contact from the room thermostat, and starts to open or close the valve. The ac­tuating movement is achieved by means of an electrically heated expansion element. When the heating current is switched o, the actuator shuts or opens the valve.
The actuator is equipped with a visual position indicator to show the open or closed position of the valve.
The actuator is equipped with a visual position indicator to show the open or closed position of the valve.
TWA NC
TWA-A
For Danfoss RA valves
TWA-V
For Danfoss RAV/VMT valves
TWA-L
For Danfoss RAVL valves
TWA-K
For Heimeier/MNG/Oventrop valves with M30 × 1.5 connection, generally as per attached drawing. Other valves must be veried individually to ensure correct valve closing measurement and valve top geometry.
TWA-D
For Danfoss RTD valves
*) 24 V Class II transformer (SELV) **) 230 V max. 3 A pre-fuse
Produced by Danfoss Industri Service 05.09 JJ-Bi.DS
Electronic programmable room thermostat (option) If the substation is connected to a room thermostat the tempera­ture is controlled by the room thermostat and radiator thermostats. Please note that the room thermostat keeps the temperature at a constant level in the whole apartment according to the set room parameters. Consult additional maintenance instructions for room thermostat for further information. It is recommended to avoid fully opened thermostats on some radiators and fully shut-o on others. Higher temperature at the top and lower temperature at the bottom part of radiators means that the system operation is correct. To keep cor­rect temperature and friendly microclimate for human beings in the apartment, it is recommended to ensure regular airing in rooms.
Thermal actuator TWA-V
Danfoss District Energy VI.IQ.G1.12 DKDHR
99
Instructions for installation and use Akva Vita TDP-F
8.0 Adjustment and commissioning of the Akva Vita TDP-F
Maintenance and commissioning
Perform maintenance procedures according to the maintenance fre­quency chart presented in the section entitled “Operation and main­tenance” on pages 12 - 13. Perform adjustment in accordance with the instructions below. For cleaning of plate heat exchanger, please see page 12.
Commissioning
Commission the substation in accordance with the instructions on page 7.
Domestic hot water control
The DHW temperature is controlled by a proportional valve – the PM controller. The DHW temperature control is realized by turning the lever towards the red (hot) or blue (cold) mark. The temperature should be set to 45-48 °C at normal use (7-8 l/min). The temperature should never exceed 55 °C to avoid lime scale precipitation in the heat exchanger. If it is not possible to set the temperature according to the above rec­ommendations, it is recommended to change the standard controller setting.
PM controller
The PM controller can operate in three basic settings:
- High
- Standard – default
- Low
Approximate setting of PM controller is dependent on district heating supply temperature and Δp:
Disposable dierential pressure Δp (bar):
60 - 70 °C low low standard
70 - 80 °C low standard standard
80 - 90 °C low high high
Setting changes:
- dismount lever by using the attached Allen wrench,
- remove plastic cap,
- mount lever again and turn it:
- 1 rotation clockwise – high,
- 1 rotation counter – clockwise – low,
- mount cap and lever again.
Disposable dierential
pressure Δp (bar):
0,2 - 0,5 0,5 - 1,0 >1,0
10
DKDHR VI.IQ.G1.12 Danfoss District Energy
Instructions for installation and use Akva Vita TDP-F
088R0248| 15.12.2005 | Version 03
INSTRUCTIONS
VI.SB.H3.02 12-2005 Produced by Danfoss Industri Service 05.09 JJ-Bi.DS
Dierential pressure controller
The dierential pressure controller reduces the uctuating pres­sure in the district heating network to a small and invariable op­erating pres
sure in the substation.
The required room temperature ist controlled on the radiator thermostats (xed setting throughout the year). It is recommended that all radiators are opened a little in each room.
TD200
The dierential pressure controller is preset from factory and
should not be adjusted afterwards.
Heating circuit, temperature control
The room temperature is regulated exclusively using the radiator thermostats.
Zone valve / thermal actuator TWA-A The Akva Vita TDP-F is supplied with a zone valve VMT/thermal ac­tuator TWA-A, which enables connection to an electronic program-
mable room thermostat.
The TWA-V is mounted on the VMT zone valve and together with a room thermostat the TWA-V is used for ON/OFF control of the heat­ing system. The thermal actuator is switched on by an external contact from the room thermostat, and starts to open or close the valve. The ac­tuating movement is achieved by means of an electrically heated expansion element. When the heating current is switched o, the actuator shuts or opens the valve.
The actuator is equipped with a visual position indicator to show the open or closed position of the valve.
TWA NC
TWA-A
For Danfoss RA valves
TWA-V
For Danfoss RAV/VMT valves
TWA-L
For Danfoss RAVL valves
TWA-K
For Heimeier/MNG/Oventrop valves with M30 × 1.5 connection, generally as per attached drawing. Other valves must be veried individually to ensure correct valve closing measurement and valve top geometry.
TWA-D
For Danfoss RTD valves
*) 24 V Class II transformer (SELV) **) 230 V max. 3 A pre-fuse
Electronic programmable room thermostat
If the substation is connected to a room thermostat the tempera­ture is controlled by the room thermostat and radiator thermostats. Please note that the room thermostat keeps the temperature in the whole apartment according to setting room parameters. Consult additional maintenance instructions for room thermostat for further information. It is recommended to avoid fully opened thermostats on some radiators and fully shut-o on others. Higher temperature at the top and lower temperature at the bottom part of radiators means that the system operation is correct. To keep cor­rect temperature and friendly microclimate for human beings in the apartment, it is recommended to ensure regular airing in rooms.
Thermal actuator TWA-V
2-way seated valve VMT 15/8.
Danfoss District Energy VI.IQ.G1.12 DKDHR
1111
Instructions for installation and use Akva Vita TDP-F
9.0 Operation and maintenance
Maintenance work
Is only to be carried out by qualied and authorised personnel.
Inspection
The water heater should be checked regularly by authorised person­nel. Any necessary maintenance must be performed in accordance with the instructions in this manual and other sets of instructions. During service the dirt strainers are to be cleaned – including the lter on the controller, all pipe connections must be tightened and the safety valve must be function tested by turning the lever.
Rinsing/cleaning of plate heat exchanger
To clean the plate heat exchanger, rinse it by running clean water through the exchanger at high speed and in the opposite direction to the normal ow. This will remove any dirt deposits that may have built up in the exchanger. If rinsing with clean water is not sucient, the exchanger can also be cleaned by circulating a cleaning agent approved by Danfoss (e.g. Radiner Fl cleaning uid) through the exchanger. Both these cleaning uids are environmentally friendly and can be disposed o through the standard sewer system. After use of a cleaning uid, the plate heat exchanger must be rinsed thoroughly with clean water.
Acid cleaning of plate heat exchanger
Deposits of limescale may build up in plate heat exchangers for domestic hot water on account of the large temperature uctuations, and because aerated water is used on the secondary side. If it becomes necessary to clean the exchanger with acid, this can be done as shown on the drawing to the right. Brazed plate heat exchangers can withstand rinsing with a dilute acid sulution - e.g. 5% formic, acetic or phosphoric acid).
Measures after maintenance work
After maintenance work and before commissioning: – Check that all screwed connections are tight. – Check that all safety features, covers, that were removed, have
been replaced properly. – Clean the working area and remove any spilled materials. – Clear all tools, materials and other equipment from the working
area. – Connect to energy supply and check for leaks. – Vent the system. – Carry out any necessary adjustment again. – Make sure that all safety features on the device and the system
work properly.
Meter reading
The caretaker/owner must perform visual checking and reading of the district heating meter at short, regular intervals. (The meter is not a part of the delivery from Danfoss). Service procedures must only be performed by trained, authorised personnel. NB! Excessive consumption for whatever reason is not covered by the Danfoss warranty.
Cooling / Return temperature reading
Cooling – i.e. the dierence between the supply and return tempera­ture of the district heating water – has a signicant eect on overall energy economy. Therefore, it is important to focus on the supply and return temperature in the heating system. The dierence should typically be 30–35°C. Please note that a low district heating return temperature is directly related to the return temperature from the heating circuit and the return temperature of the circulation water. It is therefore important to focus on these return temperatures.
12
DKDHR VI.IQ.G1.12 Danfoss District Energy
Instructions for installation and use Akva Vita TDP-F
Cooling from the water heater alone:
During tapping, the level of cooling will typically be 30–35°C. When hot water is not being tapped, it is completely normal for the return temperature from the water heater to rise slightly. In this situation, the district heating meter will register very modest consumption as the volume of water is very small. On water heaters with recirculation, the calorie meter registers the heat loss in the circulation pipe.
Tightening of connections
Retighten all connections after reading of the heat meter. If case of leaks, contact your professional provider for assistance. Please note that the connections may feature EPDM rubber gaskets! Therefore, it is important that you DO NOT OVERTIGHTEN the union nuts. Over-tightening may result in leaks. Leaks caused by over-tightening or failure to retighten connections are not covered by the warranty.
9.1 Maintenance schedule (recommendations)
Interval Maintenance work Comments
Check all connections for leaks
Check that the safety valve on the cold water supply is functioning correctly.
Check that all components are intact and functioning as intended
Clean all dirt lters/strainers in the substation Replace any lters that are not intact
At least once a year
Check that any electrical cables are in serviceable condition and that it is possible to disconnect the electrical power sup­ply to the substation
Check the pipes and exchanger for signs of corrosion
Check that any insulation covers are functioning as intended Check that the insulation ts tightly around the product
Check that the temperature regulators are set in accordance with the instructions in this manual
Check the functions of all shut-o valves Check that the ball valves open and close as they should
IMPORTANT! Replace gaskets after separation of parts.
If you identify a leak, replace the gaskets and retighten the pipe connec­tions
Check the functionality by turning the lever on the safety valves
In the event of irregularities, lack of functionality or visible faults and defects in a component, replace the component in question
Visual check. Check whether it is possible to disconnect the current to the substation.
Visual check. In the event of signs of corrosion, replace pipes or heat exchanger inconsultance with Danfoss A/S
Follow the instructions in the present manual
Danfoss District Energy VI.IQ.G1.12 DKDHR
1313
Instructions for installation and use Akva Vita TDP-F
10.0 Trouble shooting
If operating disturbances occur, the following basic features should be checked before carrying out acual troubleshooting:
- the substation is correctly connected,
- the district heating supply temperature is at the normal level (summer at least 60 °C, winter at least 70 °C),
- the dierential pressure is higher than or equal to the normal (local) dierential pessure in the district heating network. - If in doubt, ask the district heating plant,
10.1 Troubleshooting - Heating
Problem Possible cause Solution
Dirt strainer clogged on DH or HE side (radiator circuit.
Filter in district heating meter clogged. Clean the lter (after consulting the
No heat
Uneven heat distribution Air pockets in the system. Vent the installation throughly.
Defective or wrongly set dierential pressure controller.
Defective room thermostat / actuator Check the funtioning of the room ther-
Air pockets in the system. Vent the installation throughly.
- the substation is connected to electricity (pump and automatic,
- the dirt strainer in the district heating supply pipe is clean,
- air pockets in the system.
Clean dirt strainer.
district heating plant).
Check the functioning of the dierential pressure controller - clean valve seat if required.
mostat / actuator
Supply temperatur too low Dirt strainer clogged Clean dirt strainer
Too small heating surface / too small radiator in relation to the total heating requirement of the building
Poor cooling
Poor utilization of existing heating surface
Increase total heating surface
Turn on all the radiators and prevent the radistors in the system from becoming warm at the bottom.
14
DKDHR VI.IQ.G1.12 Danfoss District Energy
Instructions for installation and use Akva Vita TDP-F
10.2 Troubleshooting - Domestic hot water
Problem Possible cause Solution
Non-return valve on the circulation line
Variations in temperature
Low temperature / variations in tem­perature at the draining points
defective (leads to mixing - and the circulation water pipes become cold du­ring tapping).
Non-return valve in thermostatic mixer tap in the bathroom defective - leads to mixing of cold and hot water-. Note that variations in temperature may occur at other draining points/water taps in the system! REMEMBER, to check all the mixer taps in the house!
Replace non-return valve.
Replace mixer tap, or non-return valve only.
Not enough pressure on the hot water
Long waiting time
No domestic hot water Dirt strainer on DH supply clogged. Clean dirt strainer.
DHW temperature too low
DHW temperature too high Defective DHW controller.
Declining temperature during tapping
Dirt strainer in cold water meter or in the cold water supply line clogged.
Circulation pump out of operation - (not part of the dly).
See above.
Non-return valve on the circulation line defective (leads to mixing - and the circulation water pipes become cold dur­ing tapping).
Air in capillary tubes.
Calied heat exchanger.
Clean dirt strainer (cold water meter possibly in consulation with the water supply company).
Check whether the pump is running ­whether the pump is receiving power. control that there is no air in the pump housing - see pump manual.
See above.
Replace non-return valve.
Check the functions of the controller, and replace if required.
Air and rinse capillary tubes.
Clean heat exchanger with acid solution or replace heat exchanger.
Short-circuiting of / defective heat exchanger.
Poor cooling Calied heat exchanger.
Discoloured water (during a protracted period)
Lack of hot water pressure Calied plate heat exchanger.
Danfoss District Energy VI.IQ.G1.12 DKDHR
Plate heat exchanger short-circuited. Replace the plate heat exchanger.
Replace heat exchanger.
Clean heat exchanger with acid solution or replace heat exchanger.
Replace the plate heat exchanger or clean it with acid.
1515
Instructions for installation and use Akva Vita TDP-F
Danfoss Redan A/S
District Energy
Omega 7, Søften
DK-8382 Hinnerup
Telephone +45 87 43 89 43
11.0 EU Declaration of Conformity
EC-DECLARATION OF CONFORMITY
For CE marking in EU (European Union)
Danfoss Redan A/S District Energy
DK-8382 Hinnerup
Declares under our sole responsibility that below products including all available power and control options:
Akva Vita TDP-F
Main components: See instruction manual.
Covered by this declaration is in conformity with the following directive(s), standard(s) or other norma­tive document(s), provided that the products are used in accordance with our instructions.
EU Directives:
EMC Directive 2004/108/EEC
EN 61000-6-1 2007
industry.
Electromagnetic compatibility- Generic standard: Immunity for residential, commercial and light
EN 61000-6-3 2007 Electromagnetic compatibility- Generic standard: Emission for residential, commercial and light
industry.
Machinery Directive 2006/42/EEC
EN ISO 14121-
1 Safety of machinery -- Risk assessment
EN 60204-1-Safety of machinery - Electrical equipment of machines — Part 1: General requirements
PED Directive 97/23/EEC
Conformity assessment procedure followed: Module A - Internal control of production
All substations that falls under Article 3 §3 and category 1 shall not be CE-marked according to this directive
CE marked affixed year 2010
Approved by:
Place and date of issue: Hinnerup, Aug. 24th, 2010
Name: Thavarupan Perinpam
Title: Quality and Lean Manager
16
DKDHR VI.IQ.G1.12 Danfoss District Energy
Instructions for installation and use Akva Vita TDP-F
12.0 Commissioning Certicate
Commissioning certicate
The substation is the direct link between the district heating supply network and the household piping system. All supply pipes and the pipes in the household piping system must be checked and rinsed before commissioning. Once the system has been lled with water, all pipe connections must be retightened before performing pressure test for leaks. The dirt strainers must be cleaned and the substation must be adjusted in accordance with the instructions in this manual.
It is important to comply with all technical regulations and the applicable legislation in every respect.
Installation and commissioning must only be performed by trained, authorised personnel.
The substation is checked in the factory for leaks before delivery. Leaks are however possible due to vibrations caused by transport, hand­ling and heating of the system and therefore it is important to check all connections and to retighten if necessarys before commissioning. Please note that the connections may feature EPDM gaskets! Therefore it is important that you DO NOT OVER-TIGHTEN the connections. Over-tightening may result in leaks. Leaks caused by ove-rtightening or failure to retighten connections are not covered by the warranty.
To be lled-out by the installer
This substation has been retightened, adjusted and commissioned
on the: by installer:
Date/Year
Company name (stamp)
Danfoss District Energy VI.IQ.G1.12 DKDHR
1717
Instructions for installation and use Akva Vita TDP-F
18
DKDHR VI.IQ.G1.12 Danfoss District Energy
Instructions for installation and use Akva Vita TDP-F
Danfoss District Energy VI.IQ.G1.12 DKDHR
1919
SAV SYSTEMS LTD · Scandia House · Boundary Road · WOKING · Surrey GU21 5BX Tel. +44 (0)1483 771910 · Email: info@sav-systems.com · www.sav-systems.com
VI.IQ.G1.12
Produced by Danfoss Redan A/S © 01/2014
Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use