Paul santos 570 DC, Operating Manual, Page: 7 / 44

EN
2 Instructions for the user
This chapter describes how you should use the santos.
Instructions for the user 3
Congratulations, you are now the own-
er of a santos 570 DC,
a heat recovery unit built by Paul
Wärmerückgewinnung GmbH.
We wish you the highest levels of com-
fort.
2.1 Definition of Terms
The santos unit offers the following functions:
• Balanced ventilation;
• Heat recovery;
• Bypass for free cooling:
• Frost protection;
• Fireplace control;
• Frost protection device (optional);
• 0-10 V input;
• Geothermal Heat Exchanger (optional);
• Enthalpy exchanger (optional).
These terms/properties are described briefly in
more detail in the following sections.
2.1.1 Balanced Ventilation (controlled
residential ventilation)
The santos unit has been designed to provide bal-
anced ventilation. Balanced ventilation systems
extract stale air contaminated with smells from the
kitchen, bathroom, WC(s) and, if necessary, a util-
ity room and introduce an equal volume of fresh air
to the living room, bedroom and children's room.
A gap below the doors guarantees good and bal-
anced air circulation in the home.
Ensure these gaps are not blocked by, for ex-
ample, rubber draught excluders or high-pile
carpets. This could prevent the system oper-
ating at an optimum.
Generally speaking, the balanced ventilation sys-
tem comprises the following elements:
• santos (A);
• Duct system for the intake of outside air (B)
and the extraction of indoor air (C);
• Air supply valves in the living rooms and bed-
rooms (D);
• Exhaust air valves in the kitchen, bathroom,
toilet and, if required, the utility room (E);
A
B
E
E
E
D
D
D
D
C
2.1.2 Heat Recovery
In addition to a well-balanced ratio between supply
and exhaust air volumes the santos unit also offers
the benefit of heat recovery. Heat recovery removes
the heat from stale exhaust air and transfers it to the
fresh, mostly cooler intake air.
2.1.3 Bypass for Free Cooling
The bypass is used most of all on warmer days in
the summer months to allow in the cool night air.
The bypass functions automatically. All that is re-
quired is to set a comfortable temperature level.
2.1.4 Frost Protection
The santos is equipped with frost protection. Frost
protection is an automatic safeguard function that
drastically sinks (or even temporarily interrupts) the
intake of outside air into the santos when there is a
risk of frost. The risk of freezing exists in the winter
months with moderate to heavy frost.
2.1.5 Fireplace Control
A suitable safety device or integral system safe-
guard is required when jointly operating non room-
sealed fireplaces and ventilation systems if there is
a risk that a dangerous negative pressure can be
created in the room in which the fireplace is located.
The santos is equipped with fireplace control; how-
ever, this must be activated by the installer.
Fireplace control does not replace a safety
device designed to monitor the difference in
pressure; it is a technical precondition for
operating the unit when fireplaces are being
used at the same time.
Once the fireplace control is activated the
supply air and exhaust air fans cannot be
deactivated manually.