Installation; General Information; Heating System Connection; Heat Source Connection - Dimplex SI 8 MR Installation And Operating Instructions Manual

7

Installation

7.1 General Information

The following connections need to be established on the heat
pump:
Flow and return flow of the brine system
Flow and return flow of the heating system
Power supply
Outflows for the pressure relief valves

7.2 Heating System Connection

ATTENTION!
Flush the heating system prior to connecting the heat pump.
Before connecting the heating water system to the heat pump,
the heating system must be flushed to remove any impurities,
residue from sealants, etc. Any accumulation of deposits in the
liquifier could cause the heat pump to completely break down.
Once the heating system has been installed, it must be filled, de-
aerated and pressure-tested. The pressure indicator is located
on the control panel.
Minimum heating water flow rate
The minimum heating water flow rate through the heat pump
must be assured in all operating states of the heating system.
This can be accomplished, for example, by installing either a
manifold without differential pressure or an overflow valve. The
procedure for adjusting an overflow valve is described in the
Chapter Start-Up.
Antifreeze protection for installation locations
prone to frost
The antifreeze function of the heat pump controller is active
whenever the heat pump is ready for operation. If the heat pump
is taken out of service or in the event of a power failure, the sys-
tem has to be drained. The heating circuit should be operated
with a suitable antifreeze if heat pump systems are implemented
in buildings where a power failure can not be detected (holiday
home).
The integrated expansion vessel has a volume of 8 litres. The
volume should be checked by the heating system engineer. In-
stall an additional expansion vessel if necessary.
ATTENTION!
In the case of large-volume heating circuits, use an additional expansion
vessel to supplement the installed expansion vessel.
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7.3 Heat Source Connection

The following procedure must be observed when connecting the
heat source:
Connect the brine pipe to the heat pump flow and return.
ATTENTION!
Insert a dirt trap in the heat source inlet of the heat pump to protect the
evaporator against the ingress of impurities.
In addition, a breather must be installed at the highest point in the
heat source system.
The brine liquid must be produced prior to charging the system.
The liquid must have an antifreeze concentration of at least 25 %
to ensure frost protection down to -14 °C.
Only monoethylene glycol or propylene glycol-based antifreeze
may be used.
The heat source system must be de-aerated and checked for
leaks. The pressure indicator is located on the control panel.
ATTENTION!
The brine solution must contain at least 25 % of an antifreeze agent on a
mono-ethylene glycol or propylene glycol basis and must be mixed prior
to filling.

7.4 Electrical Connection

Connect the mains supply cable to the control panel of the heat
pump via terminal X1.
ATTENTION!
When there is danger of frost, the circulating pump will also start
immediately in standby mode after connecting the power supply.
All electrical components required for the operation of the heat
pump are located on the control panel.
Heat pump - special tariff
Many utility companies offer a special agreement with a lower
electricity tariff when heat pumps are implemented. In return, the
utility company is able to block the heat pump at times of peak
demand.
If this is the case, the customer must provide an all-pole discon-
necting device with a contact gap of at least 3 mm (e.g. utility
blocking contactor or power contactor) as well as a circuit brea-
ker with common tripping for all external conductors. The re-
quired cross-sectional area of the conductor is to be selected ac-
cording to the power consumption of the heat pump, the
technical connection requirements of the relevant utility company
as well as all applicable regulations. Details on the power con-
sumption of the heat pump are listed on both the product infor-
mation sheet and the type plate. The connection terminals are
designed for a max. conductor cross-section of 10mm
7.4
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