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5.5 Trim Piping
• Temperature - Pressure Gauge. Install temperature
pressure gauge using piping provided with boiler. See
figure 5-1. If using optional floor mount pedestal install as
close to boiler supply fitting as practical and visible.
• Boiler has integral drain valve located inside jacket directly
underneath pump. Install provided external drain valve.
5.6 System Piping
• See Table 4 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 not directly connected to control system.
• Multiple boiler system. See figures 5-6, 5-7, and 5-8 for
general guidance. Additional 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.
• Ensure washers supplied are utilized.
• Fit union connections to supply and return on boiler.
A. If soldering to boiler, ensure unions are not connected
to supply and return piping, otherwise internal seals
may be damaged.
B. Verify appropriately sized 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 5-1.
• Verify all valves are closed.
5 - HYDRONIC PIPING
• Connect supplied condensate trap to a drain. Verify there is
continuous slope towards the drain, avoid level horizontal
sections of tubing.
• Manufacturer recommends installing an isolation and purge
valve to use during commissioning to ensure the boiler does
not shut down due to over temperature.
• Do not install isolation valve between boiler and any field
installed LWCO.
5.7 Heating System And Refrigeration
Boiler when used in connection with refrigeration system,
must be installed so chilled medium is piped in parallel with
the boiler with appropriate valves to prevent chilled medium
from entering the boiler.
Boiler piping system of hot water boiler connected to heating
coils located in air handling units where they may be exposed
to refrigerated air circulation must be equipped with flow
control valves or other automatic means to prevent gravity
circulation of the boiler water during the cooling cycle.
5.8 Labor Savor Manifold Installation (supplied) See
Figure 5-1
1.
Boiler is supplied with union connection installed on boiler
piping for connection to manifold.
2.
Configure manifold to suit the application.
Note
3.
Apply sealant and tighten manifold in place. Check for
leaks.
13
Identify BOILER supply and return when
installing manifold.
PN 240011656 REV. K [11/01/2020]
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