Pressure Sensor requirements for (B355)Vertical Platform Lifts

THE TECHNICAL STANDARDS AND SAFETY ACT, 2000
S.O. 2000, c. 16, as amended (the “Act”)
- and -
ONTARIO REGULATION 209/01 (Elevating Devices)
made under the Act
Subject:
Pressure Sensor requirements for (B355)Vertical Platform Lifts
Applicable to:
Owners & Licensees of B355 Vertical Platform Lifts, Maintenance Contractors, Consultants, Mechanics
The Director, Elevating Devices Regulation (O.Reg. 209/01) pursuant to his authority under section 14 of the Technical Standards & Safety Act 2000 hereby orders the following:
1 SAFETY ORDER
1.1 All B355 vertical platforms, where any part of the hydraulic cylinder is above the top of the hydraulic oil storage tank, shall be equipped with a pressure sensor that when activated shall prevent the operation of the lowering valve or valves in conformance with clause 6.6.8 of CSA B355-09 Lifts for Persons with Physical Disabilities.
1.2 By January 31, 2012,
Owners and licensees shall ensure their B355 vertical platform lifts are compliant with clause 6.6.8 of B355-09.
1.3 Owners and licensees shall engage the services of a registered elevating devices contractor (whose scope of work includes Lifts for Persons with Physical Disabilities) or their registered maintenance contractor to determine if their vertical platform lift is compliant with clause 6.6.8 of B355-09 or if their device requires upgrading.
1.4 Contractors who undertake upgrades to facilitate compliance with clause 6.6.8 of B355-09 shall forward to TSSA a Minor ‘A’ alteration design submission on the owner’s behalf. If electrical means are incorporated then a revised http://premier-pharmacy.com/product-category/erectile-dysfunction/ electrical schematic shall be included in the submission. A copy of the revised electrical schematic shall be left on site.
1.5 When the installation is determined to be in compliance with this safety order a letter from the contractor (on company letterhead) shall be included in the log book indicating that the installation has been reviewed or upgraded and is in compliance with the requirements of this safety order (ED-248-11).

2 BACKGROUND
The 1994 edition of CSA-B355 Lifts for Persons with Physical Disabilities introduced the requirement for a pressure switch (to detect low system pressure and prevent operation of the lowering valve) if the top of the hydraulic cylinder was above the top of the hydraulic oil storage tank. This requirement was applicable to B355 devices whose designs were submitted to TSSA on or after September 1, 1994. The 2000 edition of CSA-B355 Lifts for Persons with Physical Disabilities revised the term “pressure switch” to “pressure sensor”.
For reference, a similar requirement for a lower pressure switch was added to the Safety Code for Elevators in the 1985 code.
The pressure sensor is intended to ensure elevators or vertical platform lifts are continuously supported on a column of oil. When low pressure is detected the sensor shall prevent operation of the lowering valve which in turn will prevent the drain back of oil to the tank (i.e. the loss of the oil support column) if for some reason the lift gets hung-up during descent.

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