Waterside Care and Requirements
3-4
750-91 (revised 2009)
Model CB-LE Packaged Boiler Manual
3.2.2.2 — Pump Location
It is recommended that the system circulating pumps take suction from the outlet connection on the boiler, and
that they discharge to the system load in order to put the boiler and the expansion tank on the suction side of the
pump. The suction side is preferred because it decreases air entry into the system and does not impose the system
head on the boiler.
It is common practice to install a standby system circulating pump. The main circulating pumps are usually located
adjacent to the boilers in the boiler room.
3.2.2.3 — Pump Operation
Pumps are normally started and stopped by manual switches. It is also desirable to interlock the pump with the
burner so that the burner cannot operate unless the circulating pump is running.
3.2.3 — Pressure
The design of the system and usage requirements often dictate the pressure exerted upon the boiler. Some systems
are pressurized with air, or with an inert gas such as nitrogen. Caution must be exercised to ensure that the proper
relationship of pressure-to-temperature exists within the boiler so that all of the boiler’s internal surfaces are fully
wetted at all times. For this reason, the internal boiler pressure, as indicated on the water pressure gauge, must be
held to the level identified on Figure 3-2.
FIGURE 3-2. Internal Boiler Pressure
To Next Page
Loading...
Need help?
General
