Condensate pump

Heating · Components and Problems · printed page 198 (PDF page 199)

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Book index entries

Steam Heat – Systems

Text in the illustration

OFF
motor
air vent (do not block)
from
returns
pump switch (OFF)
cutaway
float
water
receiver
to boiler inlet
check valve
impeller
condensate pump
ON
pump switch (ON)
cross section
mechanism simplified for clarity

Generated explanation

Two cutaway views illustrate the off and on operating states of a condensate pump in a steam-heating system. Condensate enters a vented receiver from the return piping, and a float linked to the pump switch responds to the water level. In the upper view, the low water level leaves the float down and the motor off; in the lower view, the higher water level raises the float and switches the motor on. The motor-driven impeller pumps water through a check valve toward the boiler inlet, as shown by flow arrows in the lower view. Both views identify an air vent that must not be blocked, and the mechanism is noted as simplified for clarity.

Components

condensate pump pump motor impeller condensate receiver float float linkage pump switch air vent check valve condensate return piping boiler inlet piping

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