ECR International CHB Application Manual page 4

NOTICE
Illustrations are meant to show system piping
concept only. Installer is responsible for all
equipment and detailing required by authority
having jurisdiction.
NOTICE
Arrange piping to prevent water dripping onto
boiler.
Piping installation, materials, and joining methods shall conform
to requirements of authority having jurisdiction or in absence
of such requirements:
• USA - National Fuel Gas Code, ANSI Z223.1/NFPA 54
• Canada - Natural Gas and Propane Installation Code,
CAN/CSA B149.1
Manufacturer requires all domestic hot water (DHW)
installations use an anti-scald valve. Local codes may
require additional equipment (expansion tank, relief valves,
etc.) select and size equipment to suit installation and meet
code requirements.
CHB - Hydronic Piping Description
Single Boiler Primary/Secondary Series Loop Zoned System With Zone Valves and Optional Indirect Tank (Fig. 1)
Single Boiler Primary/Secondary Series Loop Zoned With Zone Pumps and Optional Indirect Tank (Fig. 2)
Single Boiler Primary/Secondary Series Loop PUMPING and Optional Indirect Tank (Fig. 3)
CHB - Wiring Description
Single Zone, WITHOUT DHW Tank, with optional Supply System Pump ( Fig. 4)
Boiler with DHW Tank/Sensor, with Optional System Supply Pump (Fig. 5)
System Supply Pump Connections (Key 307) using Isolation Relay (Fig. 6)
Multiple Zone Valves, WITHOUT Indirect Tank (CH only) (Fig. 7)
Multiple Zone Valves, WITH Indirect Tank/ Sensor (Fig. 8)
Multiple Zone Pumps, WITHOUT Indirect Tank (CH only) (Fig. 9)
Multiple Zone Pumps, WITH Indirect/Sensor (Fig. 10)
Multiple Zone Pumps, WITH Indirect Tank/Mechanical Thermostat/Isolation Relay (Fig. 11)
Application Tables For : CHB - With Indirect Hot Water Tank
CHB - HYDRONIC PIPING
Quick Reference Chart - CHB Boiler
4
CHB - Piping Legend
PN 240011074 REV C, [11/01/2017]
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