Airflow DUPLEXBASE PT 2800 Manual de instalación, uso y mantenimiento - Página 13

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The following rules must be adhered to during the installation of the heater:
·
The maximum permitted temperature of heating medium is 110 °C and operational positive
pressure up to 1.0 MPa.
For the proper operation of the control set of the hot water heater the heating system must be
·
fitted with a circulation pump of suitable power that will fully cover its pressure loss. The pump,
which is supplied with the control set, is designed solely to cover the pressure loss of the water
heater!
If the unit is not equipped with a shut-off damper on outdoor air inlet e1, a tight, thermally isolated
·
shut-off damper must be installed in the duct upstream the unit (a type with a servo drive with
emergency stop, i.e. the damper automatically shuts in the event of a power outage).
The heating system must be equipped with a sludge filter in the inlet into the unit.
·
The heating circuit must be equipped by a safety valve and a sealed pressure vessel. Heat carrier
·
– untreated water or water treaded as per the rules above, properly bled. Recommended
hardness of water in the range 7 – 12°dH. In case of higher water hardness we recommend its
softening. Fluid with antifreeze protection (e.g. ethylene glycol) can be used as heat carrier if
necessary. We recommend isolating the inlet and outlet piping.
Electrical installation may be carried out only by a person having the required electrotechnical
qualification.
You will find the wiring diagram in the unit's Technical Specification or in the selection SW of
Duplexvent units, tab Controls > Wiring diagram.
4.10.

Installing mixing valve of hot water air heater

During the mechanical installation and connection of the mixing valve of the hot water air heater follow
the manual supplied with this optional accessory.
4.11.

Installing shut-off dampers e1, i1

During the mechanical installation and connection of the servo drive of shut-off dampers follow the
manual supplied with this optional accessory.
4.12.

Installing flexible flanges

During the mechanical installation of flexible flanges follow the manual supplied with this optional
accessory.
4.13.

Installing and connecting water chiller to the cool source

During the mechanical installation of the water chiller follow the manual supplied with this optional
·
accessory.
The following rules must be adhered to during the installation of the water chiller:
The water chiller in all versions must be filled with an antifreeze solution with sufficient thermal
·
resistance, or it must be drained as long as the outdoor temperature might drop below 0°C.
Maximum permitted operating positive pressure is 1.0 MPa!
·
·
The inlet of the chilled water system into the unit must be equipped with a sludge filter.
4.14.

Installing mixing valve of the water chiller

During the mechanical installation and connection of the control manifold of the hot water heater follow
the instructions supplied with this optional accessory.
4.15.

Installing direct chiller

During the mechanical installation of the direct chiller follow the manual supplied with this optional
·
accessory.
·
During the connection of the direct chiller follow the instructions of the supplier of condensation
units and connecting pipes.
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