Cetetherm Midi Wall TA
Installation, service and operating instruction
10
•
Energy meters must be installed at a prepared location, replacing a gauge block, or following the
instructions of the energy supplier.
NOTE:
the connection pipe between the valves is just for draining.
•
Retighten all connections, including those made at the factory. If connections need retightening after
the installation has been taken into service, the system should be depressurised before retightening.
If
the system is not depressurised before retightening, gaskets will be damaged.
•
Required expansion volume shall be installed and provided with adequate pre-charge before start up.
•
Remount plugs in drain valves after possible draining of circuit.
4.4 Mounting the options
•
If the substation is connected to a system sensitive to high temperature or to a low temperature system,
for example floor heating, a safety thermostat must be mounted and activated before start up.
•
If the substation shall be provided with a 3-point HB metering, see mounting instructions
3-point or 2+1-point HB metering.
•
If the substation shall be provided with a floor stand, see mounting instructions
•
If the substation shall be provided with actuators, see mounting instructions
4.5 Adjustments and settings for start up
•
Open incoming cold-water supply and fill the service water and heating circuits, bleeding off any
trapped air.
•
Check the operation and opening pressures of the safety valves.
•
Adjust the hot water temperature by having a hot water tap open at normal flow rate for a time.
Measure the temperature at the draw-off point with a thermometer. The temperature should be
approximately 55°C. It takes about 20 seconds to get stable tap water temperature.
NOTE:
Make sure that no cold water is mixed with hot water while making this adjustment.
•
Start the heating circulation pump at the strongest flow setting during some minutes. The pressure
should be at least 100 kPa during winter and at least 60 kPa during summer.
•
Set the pump capacity of the heating circulation pump according to chapter
. Use the lowest setting that manages the heating demand for best electrical efficiency.
•
The property owner must be informed on how to operate, adjust and maintain the unit. It is overly
important to inform about the safety systems and the risks associated with the high pressure and
temperature of the district heating systems water supply.
4.6 Dismantlement
When the time comes for the substation to be dismantled and scrapped it must be disposed of in the correct
manner in accordance with local or national regulations.
