Trim Piping; System Piping - UTICA BOILERS MAH-125 Installation, Operation And Maintenance Manual

5.4 Trim Piping

• Temperature - Pressure Gauge. Install temperature
pressure gauge using piping provided with boiler. See
Figure 5-1.
• Some boiler models may have integral drain valve located
inside jacket directly underneath pump. Install provided
external drain valve as required.

5.5 System Piping

• Ensure caps are removed from boiler water connections.
• See Figure 5-9 for basic system piping configurations.
• Systems with automatic fill valves require back flow
prevention device.
• Single boiler system. See Figures 5-4, 5-5, for general
guidance. 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.
• Multiple boiler system. Considerations:
• Control system requires equivalent water
temperatures entering each boiler to properly sequence
and adjust system supply temperature.
!
WARNING
Burn and scald hazard. Verify all plastic caps are
removed from boiler connections. Failure to follow
these instructions could result in death or serious
injury.
• Thoroughly flush all hydronic piping.
• Secure all valves/fittings to boiler.
5 - HYDRONIC PIPING
• Ensure washers supplied are utilized.
• Face valves and fittings to rear wall.
• Fit union bends to valves.
A. If soldering to boiler union bends, ensure bends are
not connected to the valves, otherwise internal seals
may be damaged.
B. Verify 3/4" [22.2 mm] isolating valve with filter is
fitted to heating return connection.
C. Fit pressure relief valve connection vertically before
heating isolating valve.
• Connect system valve pipe work to the boiler.
• Route pressure relief valve discharge piping to the floor.
Follow local code with respect to necessary distance to the
floor. See Figure 5-2.
• Verify all valves are closed.
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240011941 REV B, [03/31/2018]