Definitions; Symbols - Honeywell AUTOMATIC CONTROL Engineering Manual

CHILLER, BOILER, AND DISTRIBUTION SYSTEM CONTROL APPLICATIONS

DEFINITIONS

Booster Pump station: Maintains sections of a network (return
or supply pipe) in required pressure conditions. Used
in long networks or highly elevated sections.
Combined Heat & Power: Combines production of electricity
and heat for space (buildings) and processes (industrial)
Domestic Hot Water: Water controlled at a constant
temperature suitable for use in showers and hand
washing stations.
Differential Pressure Controller: Prevents too low or too high
hydraulic pressure at the building heat exchanger
substation. This improves the control performance of
the station.

SYMBOLS

Since District Heating is more common in Europe, District
Heating is based on information supplied by personnel in Europe.
TI
01
ROOM
OUTSIDE AIR
M
M
FLOW
ENGINEERING MANUAL OF AUTOMATIC CONTROL
TI
31
TEMPERATURE SENSORS
DIFFERENTIAL PRESSURE CONTROL
THREE-WAY VALVE
TWO-WAY VALVE
CHECK VALVE
JET PUMP
PUMP, AIR OR WATER
Heat Exchanger Substation: Compact Station, controls the
radiator and DHW loop in a building.
Heat Exchanger: Also called a convertor, transfers heat from
the primary network to a secondary network.
Heat Surface Factor: A value corresponding to the
effectiveness of radiating surface. The value depends
upon the shape, size, and color.
Heat Transfer Station: Controls flow, pressure and temperature
in sections of a primary network.
Primary Network: Supply and return pipe for heating medium
(hot water or steam) from the heat/power plant to the
consumer heat exchanger.
Secondary Network: Supply and return pipe for heating
medium (actuator) from heat exchanger to radiators
or tabs.
The symbols used in Figures 126 through 143 are those commonly
used in Europe and are supplied here for convenience.
384
HEAT EXCHANGER
EXPANSION TANK
WATER STORAGE TANK
SURGE TANKS
M10674