Salda RIS 1000 PE 3.0, Mounting And Installation Instruction

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14 | EN RIS PE 3.0 v2020.1
7. CONTROL
Supply air temperature can be adjusted according to the temperature measured by the supply or extracted air temperature sensor and the
temperature which is set by the user on the remote control panel. When the supply air temperature is lower than the set, bypass damper of the
units RIS PE 1000 3.0 and RIS PE 1500 3.0 is closed and fresh outdoor air passes through a plate heat exchanger.
When supply air temperature exceeds the set temperature, the heater is switched off in the first place. When the supply air temperature is higher
than the set, bypass damper of the units RIS PE 1000 3.0 and RIS PE 1500 3.0 is opened. Units RIS PE 400 3.0 and RIS PE 700 3.0 does not
have bypass damper.
In the remote controller, temperatures (the set and the measured) are displayed as degrees Celsius (°C).
Room air temperature can be adjusted not only according to the supplied air temperature sensor, but also according to the extracted air sensor
(see FLEX panel description II.6.5.3 for details on selecting this feature).
When control algorithm of the extracted air sensor is selected, then supply air temperature is adjusted based on estimated additional received
heat (heat emitted by the sun, electric heaters, etc.). Thus the energy for excessive heating of the supply air is saved. The room is heated based
on the estimated room temperature to provide the desired room temperature microclimate.
Supply air electric heater (resistance heating elements if the electric heater is used) is controlled by the ESKM controller using the PWM signal.
“BOOST” feature
Fans are started at maximum speed and “BOOST” is displayed in the remote control panel (FLEX). “BOOST” feature is inactive if the heat
exchanger protection is triggered. When triggering signal for this function disappears, the desired operation period for this feature can be selected
in the control panel (FLEX) (see FLEX panel description II.6.6 for details on selecting this feature).
There is boost time setting in minutes (factory setting: Off) in the user menu item Add.Func. For example, if 5min is set, then in case the signal
is lost for boost controlled with the external control signal, the boost will be active for 5 minutes. For boost controlled with the fast button (FLEX
control panel), boost is activated for 5 minutes if the button is pressed once, and boost will deactivated immediately if the button is pressed second
time. Maximum setting is 255 min.
START/STOP feature
The operation of the recuperator is started or stoped using the START/STOP feature. “STOP” is displayed at the remote control panel (FLEX). In
START mode, the recuperator operates based on the latest settings of the panel.
FanFail and FanRun features
It provides option to connect the external fan state indication such as the indication lamp which would visualize the state of the device.
Continuous control of the heater
The new feature is installed: continuous keeping of the supply air temperature (accuracy up to 0,5 °C) by using two-way thyristor module – ESKM...
(these modules are installed only in heaters connected to the three-phase mains).
Cooling by ventilation:
Two types of cooling exist: using halocarbon or water cooler. Cooling is based on the algorithm of the PI regulator and is activated when there
is need for cooling. Conditions for activation and deactivation of halocarbon cooler can be set and changed using the menu of the FLEX remote
control panel (see section II.6.4. of the FLEX description). Actuator position of the water cooler is set accordingly to the PI regulator in the range
between 0% and 100%. The halocarbon cooler is switched on when PI regulator value exceeds the value set in the menu (see section II.6.4.2. of
the FLEX description). The halocarbon cooler is switched off when PI regulator value is less than the set value (see section II.6.4.3. of the FLEX
description).
Ventilation:
Three types of ventilation are possible (see section II.6.3. of the FLEX description): based on the supply air (Supply), based on the extracted
air (Room) and automatic (ByOutdoor). When operation is based on the supply air, the supply air temperature is maintained as set on the PI
regulator. When operation is based on the extracted air, the set extracted air temperature is maintained to keep the supplied air temperature
between the minimum and the maximum set temperatures (see sections II.6.3.2. and II.6.3.3. of the FLEX description) based on the algorithm of
the PI regulator. When operation is automatic (ByOutdoor), both mentioned cooling types are used (supply and extracted air): cooling based on the
supply air is used when ambient air temperature is less than the set temperature (see section II.6.3.3. of the FLEX description). This is so called
“winter mode”. Cooling based on the extracted air is used when ambient air temperature is greater than the set temperature (see section II.6.3.3.
of the FLEX description). This is so called “summer mode”.
Using the remote control panel, the user can adjust fan motor speed as three steps (values of steps are speed set in the window of the remote
control panel, see sections II.6.7 and II.6.8 of the FLEX description). Analogous 0–10 VDC control signal for motors is generated by the controller
RG1. Speed of the supply and extracted air fans can be adjusted synchronously or asynchronously (see sections II.6.7 and II.6.8 of the FLEX
description).
Two pressure converters should be used to control both fans while maintaining constant pressure at the system.
Also, CO
2
(extract air) converter can be connected (if no pressure converters are connected).
7.1. SYSTEM PROTECTION
When the device has the electric heater, then two levels of overheat protection are used. Two types of the capillary thermal protections are used
for the overheat protection of the electrical heater: manual and automatic. Automatic thermal protection is activated when air temperature exceeds
+50 °C and manual protection is activated when air temperature e100 °C. Automatic thermal prot50 °C is used to disconnect the
electric heater if the temperature of the heating elements e50 °C which could cause consumption of the oxygen.
Capillary thermal protections are different only with respect to construction to allow automatic thermal protection to reset to the operation state.
Manual thermal protection does not reset and should be reset to the operation state by pressing RESET button on the service cover of the heater.
When manual thermal protection is triggered, fans operate in maximum capacity until the manual heater protection is reset (by pressing the reset
button) and the device is restarted. When heater fault is registered, manual heater protection can be restored only after estimation of the fault
cause and only if it is safe to do so regardless of the temperature setting on the control panel. Also it should be inspected if other automation and
installation elements are not damaged.
Antifreeze protection of the differential pressure heat exchanger (differential pressure relay PS600) is used only in more efficient devices (from
1200 m
3
/h).
Triggering of the automatic thermal protection mostly occur due to low fan speed (faulty fan, stuck/faulty air inlet valve/actuator).