Operation and Maintenance Manual, OnyX Sky Heat Recovery Units, 2022/01
Frapol Sp. z o.o. reserves the right to introduce changes without any prior notice.
Page
51
•
Party
mode
settings
–
this mode is useful, e.g. if more people are present in the room. The controller increases
the air exchange rate by setting the supply and exhaust air flows to the values of
Supply
and
Exhaust
. Set the
duration of this operating status in the
Duration
section.
After this time expires, the controller returns to the
previous operating status.
•
Airing
mode
settings
–
this mode is used for airing rooms. The controller increases the air exchange intensity
by setting the exhaust air flow to the value of
Flow
. The duration of the operating status in which only the
exhaust fan will operate can be set in the
Airing
duration
parameter
.
After this time expires, the controller
returns to the previous operating status.
•
Duration of
the Out-of-home
mode
–
it is a period of time for which operation of the unit is stopped. It is used,
e.g. when the user leaves the room for a longer period of time. After this time expires, the controller returns
to the previous operating status.
8.8
Alarm control panel - ECO
Settings related to the processing of signals sent from the alarm control panel. After receiving a signal from the alarm
control panel, the value of air flow through fans is reduced in accordance to the settings in:
Menu → Alarm control panel –
ECO
•
Control
panel operation
–
switching the alarm control panel on or off. After receiving a signal from the control
panel and an activated function, the control panel changes its settings for the time of receiving a signal from
the control panel.
•
Reaction of HRU
–
setting a reaction of the HRU to receiving a signal from the alarm control panel. You can
switch off the air handling unit in
HRU off
or change the settings of the supply and exhaust air using the
Supply
and
Exhaust
parameters.
•
Ventilation function
–
switching on (Active), or switching off (
Inactive)
of the Ventilation function, if the active
control mode with an alarm control panel is on.
•
Logic status
–
set the logic status of the digital input to
Normally Open [NO]
or
Normally Closed (NC).
•
Ventilation duration
–
the time in minutes during which ventilation will continue.
•
Cyclic ventilation duration
–
the time interval, within which the ventilation cycle is to be repeated, after the
unit has switched to the control mode.
•
Reheater operation during ventilation
–
the reheater operation can be switched on or off during active
Ventilation.
8.9
Heat recovery
This menu contains user settings related to bypass and ground-air heat exchanger (GHE).
Bypass dampers allow diverting external air and bypass the heat exchanger to disable the heat recovery function at high
external temperatures, or when there is a risk of frosting.
•
Heat exchanger
control
allows for selecting a control mode for bypass dampers. The dampers can be
permanently opened
–
No recovery
(in this case, the permanent heat recovery function is deactivated. There
is no risk of frosting the exchanger here); permanently closed
–
Full recovery
; or they can be controlled by the
Auto Free-Cooling
algorithm (opening of the by-pass when the intake air is cooler than the exhaust air or
a normal work algorithm
–
Auto without Free-Cooling
.
The controller controls the ground-air heat exchanger (GHE) as part of the ventilation system. Ground temperature of
approx. 8ºC is used to heat up the air in the winter, or to cool the air flowing through the GHE in the summer.
NOTE
In order to operate the GHE, the ground-air heat exchanger temperature sensor must be connected.
The
GHE control
parameter allows for selecting an operating mode for the GHE:
•
Close
–
the controller closes the damper on the GHE line and cuts off the air flow through the GHE.
•
Open
–
the controller opens the damper on the GHE line and opens the air flow through the GHE.
•
Auto
–
the controller closes the air intake damper and opens the GHE damper for the intake of air to the HRU
through the GHE, when the external temperature is above the
Winter opening temperature
, e.g. in autumn and
winter period. The controller closes the air intake damper and opens the GHE damper for the intake of air to
the HRU through the GHE, when the external temperature is below the
Summer
opening
temperature
, e.g. in
the summer
.
The switching of the dampers depends on the operating status of the controller set by the user.
