User guide

Page 8 Royal Series Water Temperature Control Units
• Forward-facing liquid-filled To and From Process pressure
gauges
• Independent high temperature safety thermostat
• Non-fused lockable rotary disconnect
• Branch fusing
• ¼” cooling solenoid valve on ¾ to 3 hp (0.56 to 2.24 kW)
models; ½” slow-close cooling solenoid valve on 5, 7½, & 10
hp (3.73, 5.60, & 7.46 kW) models
• EPDM/NI-Resist pump seal
• Adjustable low supply water pressure switch; factory-set at
16 psig (110 kPa/1.1 bars)
• 150 psig (1,034 kPa/10.3 bars) pressure relief valve
• Choice of 230 or 460 operating voltages
• ¾” water supply and drain connections; 1½” process
connections
• Automatic vent sequence
• 3” (76 mm) casters
• Operating range of 0ºF to 250ºF (-17ºC to 121ºC)
• Three (3) -year parts and labor warranty at the factory; five
(5) -year controller warranty, and limited lifetime warranty
on wetted pump components and pump seal; subject to
factory review
1-5 Available Options
Royal Series systems are available with options to tailor the unit to
your requirements. Some are factory installed; some can be retro-
fitted in the field. Consult your Sterling sales representative for
more information. Available Royal Series options include:
• Controller with integral flow meter; with:
 Up to 30 gpm (114 lpm) flow indicator
- or -
 30 to 75 gpm (114 to 284 lpm) flow indicator
 0-20 mA and 4-20 mA current control output