IMO DVG30 03 2017 Am 10 05 2017

Operation
12 DVG 30.03.2017
9 Operation
9.1 Safety notes
WARNING
Hazard from electrical voltage!
 The device may only be operated by persons
- instructed in function and risks,
- who have understood handling and can accordingly react.
 Ensure access only to persons, who can safe handle the device.
9.2 Operating conditions
 During operation, touching the impeller must not be possible.
 Safety components must not be bypassed or put out of function.
 Prevent sucking of foreign particles, this can destroy the fan.
 Switching frequency:
- the fan is intended for S1 continuous operation!
- the control equipment must not allow any extreme switching!
 The fan may operate only within the limits declared on the nameplate. Operation above 50 Hz is allowed for the
fans accordingly designed and marked on the nameplate. The DVG/F400 fan can be approved for 60 Hz operation,
if synchronous speed at 60 Hz does not exceed the data from the table in section 5.1.
 If the fan is used for smoke and heat extract (F400) in case of fire bridging of motor protective devices is neces-
sary to assure operation. Switch on max. speed even after eventual short supply cut off must be assured.
 The fans were hot tested with frequency converter and sine filter. However, it is recommended to bridge eventual
converter in case of fire (to prevent any error at motor protection setting or operation). If frequency converter is
used in case of fire, PTC and any motor protection must be bridged and switch on max. speed even after even-
tual short supply cut off assured.
 In case of speed control via frequency converter - min. 20 Hz ÷ max. 50 Hz (rsp. 60 Hz, if declared for 60 Hz), make
sure that the voltage peaks on the connection terminals of the fan are lower than 1000 V and voltage rise velocity is
lower than 500 V/μs (IEC 34-17).
ATTENTION
Hazard with risk of additional costs
 For speed control is recommended a combination of frequency converter and appropriate all-pole si-
nus filter (or minimum dU/dt filter). It is particularly important, if the supply cable is long, but also to
reduce the motor noise. It may only be abandoned, if proven, that the voltage peaks on the connection
terminals of the fan are lower than 1000 V and the voltage rise velocity is lower than 500 V/μs.
 At frequency controlled units additional EMC protection of cable and service switch could be needed
(on request).
 Subsequently fitting of EMC shielded cable from motor to connection box/service switch is connected
with disassembly of the fan!
 The motors cannot be voltage controlled!
 Exceptions, suitable for voltage control: DVG-H/V 400D4V/F400
 In the DVG fans there are not any two speed motors in Y230V/D400V connection built-in; two speed
motors are only in Y400V/Y400V or Y400V/YY400V connection.
 Small single speed motors (Y400V) are in motor connection box connected in Y; it is impossible to
change the connection to D230V without disassembly of the fan (for eventual 3x230V frequency con-
verter).