Abacus Lighting, Sutton-in-Ashfield, Nottinghamshire, NG17 5FT, England. Tel: (+44) 01623 511111, www.abacuslighting.com
7
3. Operation
3.1. General
The HL250 mast is lowered using the RLH5 counterbalance unit (electric) or the RLH7 (manual).
The HL330 mast is lowered using the RLH11 counterbalance unit. Both counterbalance units
consist of a double acting hydraulic ram mounted on a trolley, which also houses the electric
motor driven pump unit or, on the RLH7, the manual pump.
The ram on the counterbalance is individually colour coded (see section 4.3). In the event of a
hose failure a flow control valve, integral with the ram ensures that the mast lowers at a safe rate.
RLH5 counterbalance (for HL250 masts)
RLH7 counterbalance (for HL250 masts)
To Next Page
Loading...