System Protection; Using The Unit In Bms Network - Salda RIRS V EKO 3.0 Series Mounting And Installation Instruction

19.1. SYSTEM PROTECTION

a) Several steps of protection are provided for protection of the water heater.
First: if during cold periods the temperature of the outward water flow drops below +10 °C (as measured by the TV sensor), then the water heater
valve actuator M6 is forced to open regardless the need for heat.
Second: if the water temperature does not reach +10 °C after fully opening the hater valve and the air temperature after heating drops below
+7/+10 °C (as set on the protection thermostat T1), then the air supply device is stopped. To protect water heater from freezing (when the unit is
stopped), tow outputs operate: circulatory pump M4 and water heater valve actuator M6. Supply air valve actuator with the return spring is (should
be) used for the protection of the water heater. During voltage loss, supply air valve is closed immediately. It does not automatically reset and
should be reset (restarted) from the control panel.
b) 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 exceeds +100 °C. Automatic thermal protection +50 °C is used to disconnect the
electric heater if the temperature of the heating elements exceeds +50 °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 m3/h).
Triggering of the automatic thermal protection mostly occur due to low fan speed (faulty fan, stuck/faulty air inlet valve/actuator).

19.2. USING THE UNIT IN BMS NETWORK

The recuperator can be connected to the BMS network by using the ModBus protocol.
The device can be controlled using FLEX panel and BMS network simultaneously: the device will work based on the latest changes of settings.
As set in the factory, the device will operate (if no faults are present) based on the latest panel settings in case the panel or BMS network (or even
both) is disconnected. This setting can be changed, please see Flex_meniu_montuotojas section 14 "Misc" for details.
ModBus type: RTU
RS485_2 port is used for connecting the ModBus (Fig. 3);
Settings (see section II.6.2. of the FLEX installer description):
Figure. 19.1.
Stouch control panel must be connected to RS485_2 (ModBus) connection
RJ10 socket contacts reference:
1 – COM
2 – A
3 – B
4 - +24V
Microswitches 1 and 2 (Fig. 4) are mounted in the control board for selecting of resistances during network adjustment. Adjustment depends on
the connection method. If the ring type connection is used, up to 30 units could be connected. If other method is used, approximately 7 units could
be connected. The resistance between the first and the last unit should be 120...150 Ω.
Resistance Ω
180
470
330
RIRS 1200-5500 V EKO 3.0 v2019.06
RS485_1 and RS485_2. RS485_1: remote control panel socked; RS485_2: ModBus port
Switch 1
ON
ON
OFF
Switch 2
ON
OFF
ON
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