Paul thermos 300 DC, Operating Instructions Manual

Page: 6 / 72

Status 14.07.09
We reserve the right to make
changes favouring technical
progress.
Operating Instructions
thermos 200 / 300 DC
with automatic control unit
®
WÄRMERÜCKGEWINNUNG
© Paul Wärmerückgewinnung GmbH • August-Horch-Straße 7 • 08141 Reinsdorf • Deutschland
Tel: +49(0)375-303505-0 • Fax: +49(0)375-303505-55 • E-Mail: info@paul-lueftung.de • Internet: www.paul-lueftung.de
2
1.6 Filters
The MVHR unit includes two Z-shape G4 filters (dust filters). They are made of a cotton/polyester fabric in
a frame. A high-quality pollen filter (rated F 8) can be used as an option in the supply air.
1.7 Application
limits
The MVHR is designed for the use in residential and office buildings, in schools and retirement homes
(with certain limits in industrial application) at air temperatures of up to +40°C and normal air humidity.
Explosive and aggressive gases as well as solvents attacking the materials in the system are not allowed.
The unit has to be installed in a frost-free room. A ground to air heat exchanger would be advantageous
for pre-heating the intake air (in winter). If a ground heat exchanger is not feasible, a frost protection pre-
heater or a ground to brine to air frost protection must be installed upstream of the unit.
1.8 Flammability
The housing of the unit is chiefly made of PP foam (normally flammable). Other components are hardly or
normally flammable (heat exchanger, ventilation fans); the filter with the cardboard frame (flammable) can
be considered a subordinate component. So the unit complies with the building regulations.
2. Options and accessories
2.1 Basic version
The compact mechanical ventilation heat recovery (MVHR) unit comprises the heat recovery unit itself, the
central control unit with power pack, and the programmer with display and room temperature sensor.
The control system with the programmer controls enables the user to freely select the minimum, normal
and maximum ventilation steps without limitation in time. But the ventilation steps can also be stored in 8
independent programs, which can be assigned to the different days of the week. This allows for fully
automatic operation with different fan power. The ventilation steps can be changed in 1% increments for
adapting the MVHR unit to the duct system. The supply and extract air flows are balanced via a coefficient
of correction allowing different fan speeds to be adjusted for the same ventilation step. The detailed
procedure is described in section 2.5 of the User Guidance of the Automatic Control Unit.
The summer bypass valve is series equipment. It is actuated via temperature sensors and the control unit.
It is used for automatically bypassing the heat exchanger in summer. The internal motorised bypass valve
is controlled as a function of intake and extract air temperatures.
The bypass is open e.g.
t
EXT
> 23°C and t
INT
< t
EXT
(cooling function)
t
EXT
< 19°C und t
INT
> t
EXT
(heating function is possible too)
The temperature sensors are installed in the unit at the manufacturer’s site.
The bypass must be enabled (activated) and parameterised (see User Guidance of Automatic Control Unit,
Section 2.2).
To ensure the bypass valve functions properly, it is necessary to remove the supply air bypass shut-off
insert from the unit. For better tightness, the shut-off insert should be put back in place for the winter
period.
The MVHR unit can be switched off manually at the programmer without disconnecting it from the power
mains. This specific switching-off function limits the power input in standby condition to less than 2 W.
Furthermore, this automatically provides the necessary frost protection of any downstream hot water back-
up heater.