ECR International CHB Application Manual

CHB - HYDRONIC PIPING FIGURE 1 - CHB - Single Boiler Primary/Secondary Series Loop Zoned System WITH ZONE VALVES and Optional Indirect Tank Cold Water Supply BOILER Optional Indirect DHW Tank *Hot Water Supply (Tempered) Cold Water Supply CH/System Pump T & P Relief Valve to Drain S Tank Sensor 2 1 1 12” (305mm) Maximum Separation Note 2 Note Limit combined supply and return pipe lengths to maximum total linear length of 20 ft. (6.1 m) between boiler and closely spaced tees, when minimum 1” NPT pipe size is used. Linear length may be increased if supply ...

Low Water Cutoff - Detail OPTIONAL EQUIPMENT - LOW WATER CUTOFF NO NO YES ...

Figure 5 - Low Voltage Terminal Strip, CHB-130 Shown Figure 6 - Low Voltage Terminal Strip Removed from Boiler, CHB -130 Shown Low Voltage Terminal Strip Low Voltage Terminal Strip Removed Temperature Deg F Resistance in Ohms 32 32505 60 15689 70 11935 77 10000 100 8060 110 4732 120 3748 130 3104 Check our website frequently for updates: www.ecrinternational.com P/N 240010745 Rev. D [08/31/2015] ...

CHB Boiler Wiring Diagrams All field wiring shall conform to the authority having jurisdiction or, in the absence of such requirements to: USA: National Electrical Code, ANSI/NFPA 70, Canada: Canadian Electrical Code, Part I, CSA C22.1: Safety Standard for Electrical Installations. A. CHB Single Zone Indirect Storage Tank is NOT used: • Terminals 7 and 8 (Key 155) on CHB terminal strip, shall have two (2) factory supplied resistors wired in parallel. • Single room thermostat (Key 72) control internal pump and boiler operation. Remove jumper when ...