Crown Boiler TWZ Series, Installation Instructions Manual

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FIGURE 7.1: STANDARD BOILER PIPING
Standard Piping
Figure 7.1 shows typical boiler system connections on a single zone system. Additional information on hydronic system
design may be found in the I=B=R Guide RHH published by the Air-Conditioning, Heating and Refrigeration Institute
(AHRI). The components in this system and their purposes are as follows:
VII System Piping
WARNING
• Install boiler so that the electrical components are protected from water (dripping,
spraying, rain, etc.) during appliance operation and service (circulator replacement,
etc.).
• Operation of this boiler with continuous return temperatures below 120°f can cause
severe heat exchanger corrosion damage.
• Operation of this boiler in a system having significant amounts of dissolved oxygen can
cause severe heat exchanger corrosion damage.
• Do not use toxic additives, such as automotive antifreeze, in a hydronic system.
• Pipe relief valve discharge to a safe location. The relief valve may discharge scalding
hot water.
• Do not install a valve in the relief valve discharge line.
• Do not move relief valve from factory location.
• Do not plug relief valve discharge. Blocking the relief valve may result in boiler
explosion.