ECR International CCB-150, Installation, Operation & Maintenance Manual

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5 - HYDRONIC PIPING
5.5 System Piping
•
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prevention device.
• Single boiler system.
Additional considerations:
• Boiler control is designed for single central heating
pump. Installer responsible for integration of
multiple central heating pumps.
• Boiler control allows domestic hot water
prioritization. Function could be lost if central
heating pump is not directly connected to control
system
• Refer to all local codes and jurisdictional
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scald valve(s), and DHW expansion tank.
5.5A Low Water Cut Off (LWCO)
• Boiler installed above radiation level (or as required by
authority having jurisdiction) shall have low water cutoff
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• Connect LWCO switch leads to terminals provided.
See Boiler Wiring Diagram. Provide power to LWCO
per manufacturer’s instructions.
NOTICE
Boiler transformer does not have adequate VA to power
accessories, including LWCO.
•
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9 for minimum probe height. Do not install shutoff
valve between boiler and LWCO probe.
• If using separate stand pipe, install air vent using
tee to avoid nuissance shutdowns.
• Arrange piping to prevent water dripping onto boiler.
Figure 9
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Air Vent
LWCO
To
Supply
Gas
Supply
Minimum
acceptable height
for LWCO control
Safety Relief
Valve
Return
Water
Pipe
to Drain
12” [304.8mm]
Maximum Distance
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