Electrical work
12.11.2015
35 / 60
Z21826
Copyright
2013 by: WATERKOTTE GmbH. Subject to changes
board must be established with flexible lines; if necessary, intermediate termi-
nals must be used.
We recommend the use of an earth leakage circuit breaker (RCD), not ex-
ceeding 30 mA.
Replacement of mains connection cables may only be performed by customer
service or a similarly qualified person.
If the machine is equipped with a plug, it is important, that this one is accessi-
ble after the installation. If no plug is used, you have to provide a separation of
all pole with a notch of 3.0 mm to the pins.
If variable speed pumps are operated (electronic frequency control), you have
to add a separation or coupling relays for inductive or capacitive loads (AC3 /
16 A / 230 V). In no case, the variable-speed pumps are directly wired to the
relay of the heat pump. The installation is carried out on site by a qualified elec-
trician. For further inquiries, we advise you gladly.
9.2
Electrical heat generator for startup and standby
9.2.1
Initial heating of buildings during winter months
Humid, cold building condition represents a deficiency due to neglected drying
measures. As a result, the initial heat requirement is significantly higher.
The reason for this: The mass of the building must reach the required tempera-
ture. Turning on the heat results immediately in a considerable evaporation in
screed, masonry and ceilings.
About 1 kWh heat is required per kg water. As a result of the construction humidi-
ty, the K-factor of the external walls can rise to twice its value. The increased heat
requirement for ventilation, particularly if interior is not finished yet, must be added.
In the process it is possible that power requirement and energy consumption ex-
ceed the standard value by 100 %. Since the situation mentioned happens quite
frequently, the heat pump is equipped with an additional electrical heat generator
(EWE).
The additional energy consumption must be attributed to construction costs and
not to heating costs.
What must be considered when heat pump functions as heat generator?
When a heat pump uses groundwater as heat source, the extended runtime is
without consequence if the performance of the drawing well and return well is se-
cured. In this case, the support by the electrical heat generator is not even neces-
sary, as long as the fact that room temperature is reached only slowly is of no
concern.
When using a heat pump with geothermal heat source, there are concerns about
the excessive demand of the heat source under the conditions stated. There is
always a risk when the heat pump has to work in permanent mode for days. The
heat source cannot regenerate itself continuously; in unfavourable cases the
ground can be subject to frost action in areas with horizontal withdrawal.
Summary of Contents for EcoTouch Ai1 Geo
Page 57: ...Technical data 12 11 2015 57 60 Z21826 Copyright 2013 by WATERKOTTE GmbH Subject to changes...
Page 58: ...Technical data 12 11 2015 58 60 Z21826 Copyright 2013 by WATERKOTTE GmbH Subject to changes...
Page 59: ...Technical data 12 11 2015 59 60 Z21826 Copyright 2013 by WATERKOTTE GmbH Subject to changes...
