12
WARNING
Burn and scald hazard. Primary/Secondary piping
with closely spaced supply and return lines is
mandatory for ASME Code Compliance. Failure to
follow these instructions could result in death or
serious injury.
!
Check Local Codes
For Maximum
Distance To Floor
5.5 Trim Piping
• Temperature - Pressure Gauge. Install temperature
pressure gauge using field supplied piping. See figure 5-3.
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 appropriately sized automatic fill valves may
be required by local authority having jurisdiction to have
back flow prevention devices if used.
•
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
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.
•
Face valves and fittings to rear wall.
• Fit union connections to supply and return on boiler.
A. If soldering to boiler, ensure unions are not connected
to the 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.
FIGURE 5-3 Temperature Pressure Gauge and Safety
Relief Valve Installation -
Viewed from Back of Boiler
5 - HYDRONIC PIPING
Safety
Relief
Valve
Temperature
Pressure
Gauge
LWCO
System
Return
System
Supply
MINIMUM
ACCEPTABLE
HEIGHT FOR
LWCO PROBE
12” (305mm)
Maximum
Separation
PN 240011662 Rev. H [04/30/2019]
