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Ecozon 2005 Copyright | A MediaWorksproduction |
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Modell > Ecozon VPLV-700
Installation instructions
In addition to the following, local directives must always be followed during the installation.
The unit must be checked carefully on delivery. Any signs of transportation damage or other external damage must be reported to the carrier and rectified before installation can be started.
Installation - Placement
This unit must be installed by a qualified fitter. Before installation, check that the available mains voltage corresponds with the voltage stated on the unit's rating plate.
Do not install the unit in areas where smoke or dangerous gases can occur, or in extremely damp areas or where there is steam, for example, in laundry rooms or greenhouses. If in doubt, contact the supplier.
Do not install the unit in areas where excessively high heat-producing equipment is located. In order to protect the unit against corrosion (rust attack), avoid installing the outdoor section where salty water can splash onto the unit, or in environments where the air is very acidic and sulphurous. All electrical installation work must correspond with applicable local requirements, and may only be carried out by a qualified electrician.
Never use a main circuit-breaker to start and stop the unit. Do not insert objects into the air grille on the outdoor section. This is dangerous as the fan blades rotate at high speed.
Never let children play near the unit.
Temperatures
The heat pump can operate up to a maximum return temperature of about 55 °C. Above that temperature the heat pump stops for reasons of safety. The maximum outgoing temperature from the heat pump is about 60 °C depending on the outdoor temperature. However, a higher temperature can be achieved by using the electric water heater.
Particle filter
The supplied particle filter must always be fitted horizontally on the incoming hot pipe as close to the heat pump as possible.
Transportation
The heat pump must always be transported and stored upright and dry.
Placement
The heat pump and floor stand must be positioned on a solid surface. (See concrete bases, page 20) Avoid installing the heat pump close to sensitive walls such as bedroom walls, since the pump produces a certain amount of noise when running. The heat pump should be placed as close as possible to the existing boiler to make pipe routing easier.
The heat pump produces water from condensation and from the defrosting process. Installing it close to pathways or staircases should therefore be avoided because of the risk of ice forming. There must be clear space around the heat pump so that air is not prevented from flowing through the heat exchanger. The minimum distance from a wall should be 300 mm. Avoid locations that cause recirculation of cold air, since this reduces the output of the heat pump.
Connecting to the heating system
Filling the radiator system
The radiator system should have its own expansion tank! Open the tap between the cold water system and the heating system in short intervals and then close it and note the pressure gauge reading. When the system is full or the right pressure has been reached, vent the system and top it up if necessary.
Commissioning the heat pump
General
Before the heat pump goes into service, the heating system must be filled up and completely vented. Also check that there are no leaks in the system. Always ensure that there is heat medium circulation when connecting to an existing water system. With under floor heating, at least two of the circuits must be open. When connecting to a fan-assisted radiator system, the fans in the radiator are controlled and the taps on the fan-assisted radiators are opened fully.
Basic tips to make savings
The lower you can keep the temperature of the radiators in the house, the better your heating economy. So make sure not to set your heat curve too high. Run your heating system as efficiently as possible by making sure that the entire surface of your radiators or your floor heating coils are kept hot. Thermostatic valves on your radiators or floor heating may have a negative effect on your heating system because they restrict the flow so that the system has to compensate with a higher water temperature. If thermostat valves are fitted, they should be fully opened, except in bedrooms, where they can be turned down slightly.
Important points to check
For the heat pump to perform at its best, it is important to check the flow on the hot side of the heat pump. The circulation pumps usually have a speed selector switch; this must be set correctly for the pressure drop in the systems. The recommended temperature difference across the heat pump on the hot side is 7 °C. The nominal flows stated in the Technical data section gives a difference of 5 °C in the +7/45 °C operating instance. The easiest way to check this is to us an electronic thermometer. The flow through the radiator system must be high enough to guarantee that the entire surface of the radiators is kept hot. This maximises the heat-radiating surface and keeps down the flow temperature from the heat pump. After testing, vent the system again and top up with cold water if necessary.
Risk of freezing
Note that the heat exchanger is located outdoors, which involves a risk of freezing in the event of a power failure. Drain the heat exchanger when a power failure longer than one hour in low temperatures occurs (-1 or lower). The circulation pump must never stop when the heat pump is running. The circulation pump must still be running even when the heat pump has been stopped in cold weather.
Fan control
Two speed fans are controlled by a pressure switch on the refrigerant circuit. This can be adjusted if necessary to ensure the high speed is engaged with a low outdoor temperature.
Defrosting principle
The principle of defrosting in the heat pump is known as hot gas defrosting. This involves the reversal of the flow in the refrigerant circuit using an electrically-controlled four-way valve. The compressed gas from the compressor is led into the evaporator, causing the ice on the outside to melt. During this process, the water in the radiators is cooled slightly. The defrosting process is controlled by a defrosting module, which by means of a sensor, measures the refrigerant temperature and starts the time controlled interval between each defrosting phase. The time required for defrosting depends on the amount of ice and the outdoor temperature.
