Salda VEGA Series, Руководство пользователя

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EN | 17 VEGA v2019.06
19.5. OPERATION OF VEGA 1100 W WATER HEATER PROTECTION FUNCTION
Controller version Ventik-W has a water heater frost protection function. This feature works differently when the controller is in normal mode and
when in standby mode.
Protection in standby mode:
When active standby mode, the controller every second measures the air temperature and the return water temperature.
If the air temperature is higher than 0
o
C, protection is not activated.
If the air temperature drops to or below 0
o
C, the controller switches on the circulation pump and opens the three-way valve so that the return
water temperature will be 25
o
C.
Protection in normal operation:
When the controller is in normal mode, the heater frost protection uses two parameters:
1. T
AL
critical return water temperature (-10
o
C ... + 5
o
C).
2. P
BAND
frost protection working zone (5
o
C ... 10
o
C).
T
AL
is a critical return water temperature. If the water temperature drops to or below this threshold, the controller stop the system and displays
error A2.
PBAND enables the system react in water temperature drop, before error A2.
T
AL
+ P
BAND
= T
P
. T
P
is the lowest temperature of the water when the three-way valve and pump control is carried out under the normal supply air
temperature control mechanism. When run this mechanism, the controller is working so that the supply air temperature is as close as possible to
the set-point temperature.
If the water temperature drops below the T
A
, then higher priority have frost protection mechanism.
19.6. INFORMATIONAL AND PROTECTION CIRCUITS OF THE UNIT
1. FAN MOTOR PROTECTION
It is normally closed contacts A4, GND in connection X1. Contacts are for the connection of engine thermocontacts. When thermocontacts in-
terrupts the circuit, the controller displays an error A4 and stops the system. The same error A4 can be triggered by thermocontacts of engine
transformer. If the transformer’s temperature reaches 70°C or more, the controller responds the same: an error A4 occurs and stops the system.
2. HEATERS OVERHEAT PROTECTION
Control box has a potential free normally closed contacts A6, GND in connection X1. Input gives a signal about active electric heater protection.
When the circuit is interrupted, the controller displays an error A6 and stops the system.
3. OUTPUT FOR EXTERNAL ALARM
It is potential free normally closed contacts A1, GND in connection X1. Contacts are for the reception of the signal of an external alarm. Most often,
these contacts are connected to the fire safety system. When the circuit is interrupted, the controller displays alarm A1 and stops the system.
4. FOR THE PRESSURE RELAYS OF THE FILTER
It is normally opened potential-free contacts Filter, GND in connection X1. Contacts are used to receive a signal from the pressure rely. When
pressure relay is activated, the circuit between the contacts is being closed. If the circuit remains closed for 60 sec., contaminated filter alarm (FIL)
is displayed. The system is not stopped.
5. FOR THE SUPPLIED AIR TEMPERATURE SENSOR
Contacts Ain1 are provided for the connection of supply air temperature sensor, GND in connection X1. Supply air temperature sensor’s technical
characteristics are provided in the table below.
Technical characteristics of supply air temperature sensor
Thermister NTC10K (10@25
o
C; β = 3250÷3300K)
Measuring range -40…120
o
C
Measurement accuracy, % ±1
19.7. AIR DAMPER ACTUATOR CONTROL
When the controller is turned on for 90s it is opening the air damper and then starts the operation. When the controller is turned off, the air damper
is closed.
Contacts (N, L and Supply) in connection X13 are foreseen to connect air damper actuator. 230VAC voltage always is in contact L. When the
controller gives the command to open air damper, 230VAC voltage occurs in contact “Supply”. When the controller gives a command to close air
damper, voltage is switched off in contact “Supply”.
19.8. FAULT ALARMS ON FELX CONTROL PANEL
Look for fault alarm list in FLEX technical manual.
19.9. FAULT ALARMS ON STOUCH CONTROL PANEL
A.01 Fan fault A.08 Any sensor fail alarm
A.02 Supply air temperature sensor fault A.09 Critical return water temper. alarm (A5)
A.03 Return water temperature sensor fault A.10 Low voltage alarm (A7)
A.04 Outdoor air temperature sensor fault A.11 Overheat. Alarm from A6 input (A6)
A.05 Fire protection activated A.12 Clogged filters
A.06 Cold spell (exchanger). Tsupply temp. less than (Tset-10’C) alarm (A2) A.13 Overheat. Tsupply temp. higher than 40 ‘C alarm (A6)
A.07 Fan overheat. Alarm from A4 input (A4)
19.10. MODBUS CONNECTION AND CONTROL PANEL
X12 connection is used for communication with the remote control panel. The same connection is used for Modbus communication. This means