Power Unit: Optional Features
The Hydraulic Dampener (EHD) is extremely effective in suppressing the sound and pulsation present in hydraulic elevator systems. The EHD has a minimum burst pressure of 6000 psi with an ASME A17.1/CSA B44 allowable working pressure of 1200 psi.
The Oil Cooler (OC) is extremely efficient in cooling the oil in the hydraulic elevator machine room in which it is installed. The heart of the unit consists of a triple screw pump which is highly reliable and quiet.
The Tank Heater (TH) is simple to install and operate. Designed to keep your hydraulic oil at the optimum operating temperature in cooler environments to provide optimum operation of your hydraulic elevator system. Pre-Set 110° F Thermostat, 120 Volt AC, 250 Watts, 2.1 Amps, Oil-Tight Fittings included.
The Shut Off Valve (SOV) is used to isolated one section of the system from another. All Shut Off Valves are constructed of ductile iron bodies and use a stainless steel ball. A locking device is standard on all sizes.
Pressure Gauge Fittings
The Pressure Gauge Fitting System is used to provide a means of attaching a Pressure gauge to the control valve. It is provided with a 1/8 brass shut off valve and a male quick disconnect fitting. Individual fittings can be purchased to create your own arrangements. Contact EECO for details.
Load Weighing Kit
The EECO’s Load Weighing Kit (LWK) is an addition to a new or existing Power Unit to prevent the elevator from being overloaded. The switch can be wired into the controller, if the provision is available, through either a normally open or normally closed contact.
The Thermal Switch Assembly (TSW-1) is required to be installed on all Hydraulic Power Units, per ASME A17.1/CSA B44 22.214.171.124, to prevent the liquid temperature from rising above its maximum operating temperature. These switches are factory preset at a temperature setting of 145º F (63º C).
Isolation Anchor Kit
The Isolation Anchor Kit allows the installer to secure the power unit to the machine room floor while isolating the unit from transferring vibration and noise through the building.
Valve Return Filter Kit
The Valve Return Filter (VRF) is a passive oil filtration system attached to the tank return port of the valve. The VRF allows you to easily comply with the ASME A17.1/CSA B44 Rule 126.96.36.199.1 by capturing particles 5 microns in size and larger preventing the buildup of debris within the tank making it easier to clean.
Low Oil Switch
A Float Level Switch (LOS) is used to detect the oil level in a reservoir. The 1-3/16” diameter float helps to limit surges that might occur. The switch is UL recognized and CSA listed for a maximum of 3 amps @ 250 VAC with a SPST.
The standard configuration is normally open which can be changed to normally closed, by inverting the float on the units stem. Mounting is accomplished by 1/4” NPT and electrical termination are two 18 AWG, 39” long wires.