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English
Hoyer
®
HPL450 / HML450 Lifts
8. Emergency lower:
In the case of a complete electrical failure the electrical actuator is fitted with a mechanical
lowering device (RED BOSS). The device must be twisted clockwise by hand to operate. A slow decent will
commence. Repeat this process until the patient has been safely lowered.
WARNING
The emergency lowering device should only be used in the event of electrical failure. It must not be used to
lower the patient on a regular basis.
WARNING
If this feature is used, the lift MUST be subsequently checked out by a competent engineer.
WARNING
Continued use of the hoist after using the emergency descent feature may compromise the duty of care and
safety of the patient.
9. Batteries:
The batteries are protected from deep discharge by a LOW VOLTAGE ALARM. This will sound when the
batteries need recharging and the hand control is being operated. It will not sound independently of the hand control
being operated. DO NOT IGNORE THIS WARNING ALARM. Complete the lifting operation and place the battery on
charge (see charging instructions).
10. Raising and lowering the boom (hydraulic models only):
The raising and lowering of the boom is achieved by
a powerful hydraulic ram which is operated by two simple controls. The release valve, which is identified by a black
knurled knob, and the pump handle which is a long lever on the side of the hydraulic unit.
To raise the boom, ensure the release valve is closed. The valve is closed by gently turning the knurled knob fully
clockwise. When closed, pump the long handle with smooth even strokes for maximum effect. The handle strokes
from an upright position through an arc of 90 degrees. Leave the handle in the upright position when not in use.
WARNING
DO NOT force the handle beyond the upper or lower stops. The hydraulic unit can be rotated to allow the
handle to be used from either side of the lift.
Fig. 9
