Intellifan Function - TECSYSTEM VRT200 Instruction Manual

INTELLIFAN FUNCTION

The Intellifan function allows you to reduce the thermal shock on the transformer by partially anticipating (one bar at
a time) the activation of the tangential ventilation system.
The reduction of the thermal shock on the transformer will allow you to prolong the life of the transformer and the
same ventilation system.
By enabling the FAN1 "INT" of the monitoring unit (version ED16), the control unit will alternate the activation (every
30 minutes) of the FAN1 and FAN2 contacts, anticipating the activation of the ventilation system at the intermediate
value between FAN1 ON and FAN1 OFF.
ES. FAN1 ON = 70 ° C and FAN1 OFF = 60 ° C FAN ACTIVATION INT. = 65 ° C
Note: After exceeding the FAN1 threshold, the control unit will activate both bars.
Connections VRT200 ED17 + pre-configured control unit with INTELLIFAN enabled
Before you enable the function, always check that the connection between the two FAN 1 and FAN 2 contacts, of the
monitoring unit, and the VRT200 is: FAN1 contact with COM - EN1, FAN 2 contact with COM - EN2, example at
page 9.
You can enable the INTELLIFAN function, Step 7 of the VRT200 programming, by selecting: Led's ▲ On: Enabled
function and Led's ▼On: Disabled.
Note: For proper operation of the INTELLIFAN function, it is recommended to comply with ΔT 10 ° C between FAN1
ON and FAN1 OFF and enable the function on both the VRT200 devices and the temperature monitoring unit.
The Intellifan monitoring devices are: NT935 BASIC, NT935 AD, NT935 ETH, NT935 IR BASIC, NT935 IR AD,
T1048 BASIC, T1048 RS485, T1048 ETH.
Connections VRT200 ED17 + control unit without INTELLIFAN or disabled function
FAN1 contact of the monitoring unit must be connected to COM - EN1; FAN2 contact, if available, shouldn't be
connected to the VRT200 ED17, example on page 9.
NOTE: For more information, see technical bulletin 013-17, available in the Tecsystem support section.
WARRANTY CONDITIONS
The Product purchased is covered by the manufacturer's or seller's warranty at the terms and conditions set
forth in the "Tecsystem s.r.l's General Conditions of Sale", available at www.tecsystem.it and / or in the purchase
agreement. The warranty is considered valid only when the product is damaged by causes attributable to
TECSYSTEM srl, such as manufacturing or components defects.
The warranty is invalid if the Product proves to have been tampered with / modified, incorrectly connected,
because of voltages outside the limits, non-compliance with the assembly and use technical data, as described
in this instruction manual.
The warranty is always ex Corsico as stated in the "General Conditions of Sale".
TROUBLESHOOTING
The control unit does not switch on and the
supply to terminals 40-42 is correct.
M1 or M2 over-current red LED ON.
M1 or M2 under-current yellow LED ON.
All the LEDs are flashing.
All the LEDs are ON.
Contact TECSYSTEM Technical Department if the problem persists.
12
CAUSES AND SOLUTIONS
Check that: the connector is correctly inserted into its housing, the
wires are tightened, there is no evidence of burning on the
connectors. Disconnect the power supply, carry out the above and
reconnect.
Check the condition of the fans and replace any faulty ones. Re-
program the device.
Check the condition of the fans, the cables and the supply.
Re-program the device.
Memory error, press RESET and repeat the programming
procedure.
Probably microcontroller faulty, return the device to Tecsystem for
repair.
VRT200