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INSTALLATION INSTRUCTIONS Type A/H-HRC Panel

THESE INSTRUCTIONS COVER INSTALLATION OF THE FOLLOWING PANEL ASSEMBLIES: Power Supply 380, 460 or 575V, 50/60 Hz AC 230VDC Pressure Cluster Air Hydraulic Ratio 8 x 1 5 x 1 8 x 1 5 x 1 No. of Pressure Clusters 1 2 J71020 J71022 J71021 J71023 J71024 J71026 J71025 J71027

A/H-HRC PANEL PIPING DIAGRAM

Mount the panel on a rigid vertical support, low enough for the 1/2" air line from the compressor to slope down to the air reservoir. This permits moisture to drain to the reservoir where it can be automatically ejected by the moisture valve.   Pipe and wire the panel into the system per applicable connection diagrams.   After the brake system is completely piped and wired, turn power ON. Check preset air pressures:
Compressor supply pressure at gauge A must range from 65-80 psi. This pressure is controlled by 1PS N.C. pressure switch.   Emergency Brake pressure (ON when ESV solenoid valve is deenergized) is factory set at 40 psi. Check gauge B behind pressure	regulator. This pressure may be reset in field.           See "Pressure Adjustment Instructions"           below. Abnormally low compressor supply pressure is signalled by 2PS N.O. pressure switch, which must close on 60 psi increasing pressure and open on 50 psi decreasing pressure.
SPECIAL BLEEDING AND PRESSURE ADJUSTMENT INSTRUCTIONS FOR A/H-HRC SYSTEM
Fill fluid reservoir/bleeder(s), pressure cluster(s) and control cylinder (and pilot circuit reservoir if used). Bleed A/H brake circuit by holding BPB bleeder pushbutton in and stroking pressure cluster(s) by repeatedly pushing BCV bleed control valve. Bleed the HRC hydraulic remote controlled circuit by opening the bleeder screw on the HRC valve and pumping the control cylinder until clear fluid escapes from the bleeder screw. Close bleeder screw. If HRC circuit includes coiled or looped hose, move trolley to cause straightest possible hose length when bleeding system.	After brake system is bled and brakes are adjusted, operate brake system. Operation should be precise, without noticeable time delay. Check operation of emergency brake step by disconnecting power. The crane should come to a quick stop without abnormal hook swing. Adjust emergency pressure if necessary. Note: Application of emergency brake step initiates slow pressure bleed-down. Brake system is completely released after 1-2 hours.
AC WIRING DIAGRAM TYPE A/H-HRC AIR/HYDRAULIC PREWIRED CONTROL PANEL	DC WIRING DIAGRAM TYPE A/H-HRC AIR/HYDRAULIC PREWIRED CONTROL PANEL
Note: Standard AC Panels Are Designed For 460V operation.	1PS - N.C. Compressor Start-Stop Pressure Switch (80/65 PSI) 2PS - N.O. System Pressure Switch (60/50 PSI) BPB - Bleeder Pushbutton