15
5.5 Trim Piping
• Temperature - Pressure Gauge. Install temperature
pressure gauge using piping provided with boiler. See
figure 5-2. Boiler has integral drain valve located inside
jacket directly underneath pump. Install provided external
drain valve.
5.6 System Piping
• Systems with automatic fill valves require back flow
prevention device.
• Single boiler system. See figure 5-4, for general guidance.
Additional considerations:
• Boiler control does not accommodate central heating
pump. Installer is responsible for integration of central
heating pumps with field sourced control.
• 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 5-5 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. Flush system (wash) clean
after installing all piping. Debris or cutting oils, etc., left inside
system will reduce heat transfer in heat exchanger. Small
pieces of Teflon tape are eventually trapped in the water pump
impeller and reduce water flow rate. Non-flushed systems
have low energy efficiency and potential boiling noise due to
ineffective heat transfer and reduced water flow rate. Flush all
zones one by one, when flushing the system.
• Secure all valves/fittings to boiler.
• 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 Figures 5-2 and 5-3.
WARNING
Burn and scald hazard. Safety relief valve could
discharge steam or hot water during operation.
Install discharge piping per these instructions.
!
• 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.
• Connect supplied condensate trap to a drain. Verify there is
continuous slope towards the drain, avoid level horizontal
sections of tubing.
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.
PN 240012369, REV A [08/31/2018]
5 - HYDRONIC PIPING
Содержание GMHB227
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