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5.4 Trim Piping
• Temperature - Pressure Gauge. Install temperature
pressure gauge using nipple, tee and bushing provided with
boiler. See figure 5-3.
• Drain Valve. Install drain valve using nipple, tee and
bushing provided with boiler. See figure 5-3.
5.5 System Piping
• See Table 3 for basic system piping configurations.
• Systems with automatic fill valves require back flow
prevention device.
• Single boiler system. See figures 5-5, 5-6, 5-7A, & B 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 figure 5-8A, B & C for general
guidance. Additional considerations:
• Control system requires equivalent water
temperatures entering each boiler to properly sequence
and adjust system supply temperature.
• Install multi boiler sensor kit. See "Parts, Kits &
Optional Accessories" manual for part number.
• Heating system with existing primary loop, close internal
primary loop ball valve.
• Heating system without existing primary loop, leave internal
primary loop ball valve open to use internal primary loop.
5 - HYDRONIC PIPING
FIGURE 5-3 Temperature Pressure Gauge and Drain
Valve Installations
Temperature
Pressure Gauge
shown at System
Supply Connection
Drain Valve shown
at System Return
Connection to
16
Gas Supply
Boiler
PN 240011320 Rev. G 10/01/2021]
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