25
5.5 Manual operation
5.5.1 Emergency Descent
In case of power failure you can manually open the
brake:
–
Take the control lever (1) from the carrying han-
dle, insert it through the motor cover into the
brake release point, and raise it (fig. 51).
Important:
On working platforms with more than one
TIRAK
®
, if possible open brakes simultane-
ously on all hoists – if only one operator is
on the platform, open brakes alternately so
that no inadmissible inclined position occurs.
–
Move the suspended access equipment down the
rope(s). The centrifugal brake ensures a limited
descent speed.
To STOP: release the control lever (1).
After use: put back the control lever (1) in the carry-
ing handle.
CAUTION!
Emergency descent in case of
overload is prohibited!
Fig. 51
2
1
3
5.5.2 Manual lifting
–
Take off rubber cap (3).
–
Put the hand wheel (2) on the motor shaft and
with the brake opened (see above) turn to the
right (TIRAK
®
T…) or to the left (TIRAK
®
X…) to
let the TIRAK
®
climb the wire rope together with
the suspended access device.
–
After use: put brake release lever (1), hand wheel
(2) and rubber cap (3) back to their original posi-
tions.
5.6
Action in the event of
operation of the fall arrest device
A) DANGER!
In the event of rupture of the lifting
rope or failure of the hoist, evacuate
the crew of the man-riding equipment.
In the event of operation of the fall arrest device
the suspension of the safety rope and the con-
nection between BLOCSTOP
®
and suspended
access equipment are submitted to dynamic loads.
Before resuming normal operation carry out checks
as per section 5.1!
B) In the event of interlocking/becoming caught
during downward travel so that the lifting rope is
no longer under tension (only on BLOCSTOP
®
models BSA...),
in the event of inclined position of more than
14
(only on BLOCSTOP
®
models BSA… on plat-
forms with two hoists attached to the ends),
on BLOCSTOP
®
models BSO... which are closed
by pressing the EMERGENCY STOP button:
– release the safety rope by moving the sus-
pended access equipment upwards – in the
event of inclined position, only the lower end.
– In the event of a power failure move upwards
in manual operation as per section 5.5.2.
STOP
– The fall arrest device BLOCSTOP
®
BSA…
is automatically re-opened by the tensioned
lifting rope (fig. 52).
– Open BLOCSTOP
®
models BSO... manually:
Press down lever (A) until it locks into position
(fig. 52).
Attention!
When the suspended access equipment is on
the ground again, check the fall arrest device
operation as per section 5.2 on page 23.
CAUTION!
Replace defective BLOCSTOP
®
devices
and send for repair by the manufacturer
or by a hoist workshop.
STOP
AUF
Fig. 52
Lifting
rope
Safety rope
A
BLOCSTOP
®
BSA …
BSO …
