9
Ground source heat pumps since 1983
Deaeration can be made more efficient by using the pump on the ground loop of the heat pump. The circulation water
pump on the ground loop and the submersible pump used in the deaeration are then connected in series. The circula-
tion water pump on the ground loop is started as follows:
1. ensure that the red switch on the protective switch for the compressor motor has been pressed down
(this stops the compressor activating)
2. turn on the power at the mains
3. turn on the control current
4. turn the switch on the ground loop pump to the left (the pump on the ground loop in continuous use)
Before starting the ground loop pump, fill the filling hose on the suction side with a water and ethyl alcohol mixture
using a submersible pump or, for example, a watering can to ensure the ground loop pump does not run empty.
In models 7–10.5, a submersible pump should always be used for deaeration, while in models 13–15, the deaeration
can also be carried out using the ground loop pump on the heat pump only. We do, however, recommend the use of an
external pump to speed up deaeration and make it more efficient.
2.5. Heating connection
The pipes in the heating network are connected to the thermal heat pump using either textile hoses (network of
radiators) or using a fixed piping network (floor heating network). These connections stop sound from passing into the
pipes. All heating connections (for example, a heating radiator for an air conditioner or a heated towel rail) must be
made to the heat piping. When the network piping on the is in place, filling may commence. The pipes in the network
are filled with water. Please note! If renovating, ensure that the heat distribution piping has been properly rinsed before
connecting the heat pump.
Filling a heating system fitted with a pressure gauge:
• open the fill valve on the heating network
• fill the piping with water
• deaerate the piping through the water tank
• fill and deaerate the network until all the air has been removed and leave the pressure at 1–1.2 bar
2.6. Domestic water connection and circulation of water
Complete the piping connections according to the piping connections diagram in section 2.2. The circulation water
pump is installed on the input side of the heat pump. The mixing valve is fitted to the hot water pipe in order to prevent
burns. The overflow pipe is joined to the floor drain as instructed or to an overflow funnel if the distance to the floor
drain is more than two metres. The overflow funnel must be directed down towards the floor drain. The backpressure
valve is fitted to the cold water joint on the input side.
We recommend that the a timer be installed to control the circulating water pump for running water in so that the pump
only operates when water is needed. Without a timer control, the heat pump will have a considerably higher operating
time ratio.
