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

Danfoss Akva Vita TDP-F Operating guide

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
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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
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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.
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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.
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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.
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DKDHR VI.IQ.G1.12 Danfoss District Energy
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