Honeywell W7750A 用户手册
EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
74-2958—1
10
Abbreviations and Definitions
AHU
Air Handling Unit; the central fan system that includes
the blower, heating equipment, cooling equipment,
ventilation air equipment, and other related equipment.
ventilation air equipment, and other related equipment.
CO
Carbon Monoxide. Occasionally used as a measure of
indoor air quality.
CO
2
Carbon Dioxide. Often used as a measure of indoor air
quality.
CARE
Computer Aided Regulation Engineering; the PC
based tool used to configure C-Bus and L
ON
W
ORKS
Bus
devices.
C-Bus
Honeywell proprietary Control Bus for
communications between EXCEL 5000
System
controllers and components.
CPU
Central Processing Unit; an EXCEL 5000
OPEN
SYSTEM controller module.
cUL
Underwriters Laboratories Canada
CVAHU
Constant Volume AHU; refers to a type of air
handler with a single-speed fan that provides a constant
amount of supply air to the space it serves.
amount of supply air to the space it serves.
DDF
Delta Degrees Fahrenheit.
D/X
Direct Expansion; refers to a type of mechanical cooling
where refrigerant is (expanded) to its cold state, within a
heat-exchanging coil that is mounted in the air stream
supplied to the conditioned space.
where refrigerant is (expanded) to its cold state, within a
heat-exchanging coil that is mounted in the air stream
supplied to the conditioned space.
Echelon
The company that developed the L
ON
W
ORKS
Bus
and the Neuron
chips used to communicate on the
L
ON
W
ORKS
Bus.
Economizer
Refers to the mixed-air dampers that regulate
the quantity of outdoor air that enters the building. In
cool outdoor conditions, fresh air can be used to
supplement the mechanical cooling equipment.
Because this action saves energy, the dampers are
often referred to as economizer dampers.
cool outdoor conditions, fresh air can be used to
supplement the mechanical cooling equipment.
Because this action saves energy, the dampers are
often referred to as economizer dampers.
EMI
Electromagnetic Interference; electrical noise that can
cause problems with communications signals.
E-Link
Refers to the Q7750A Zone Manager. This name is
used in internal software and in CARE software.
EMS
Energy Management System; refers to the controllers
and algorithms responsible for calculating optimum
operational parameters for maximum energy savings in
the building.
operational parameters for maximum energy savings in
the building.
EEPROM
Electrically Erasable Programmable Read Only
Memory; the variable storage area for saving user
setpoint values and factory calibration information.
setpoint values and factory calibration information.
Enthalpy
The energy content of air measured in BTUs per
pound (KiloJoules per Kilogram).
EPROM
Erasable Programmable Read Only Memory; the
firmware that contains the control algorithms for the
Excel 10 Controller.
Excel 10 Controller.
Excel 10 Zone Manager
A controller that is used to
interface between the C-Bus and the L
ON
W
ORKS
Bus.
The Excel 10 Zone Manager also has the functionality
of an Excel 100 Controller, but has no physical I/O
points.
of an Excel 100 Controller, but has no physical I/O
points.
NOTE:
The Q7750A Zone Manager can be referred to as
E-Link in the internal software, CARE.
E-Link in the internal software, CARE.
E-Vision
User interface software used with devices that
operate via the FTT L
ON
W
ORKS
Bus communications
protocol.
Firmware
Software stored in a nonvolatile memory medium
such as an EPROM.
Floating Control
Refers to Series 60 Modulating Control of
a valve or damper. Floating Control utilizes one digital
output to pulse the actuator open, and another digital
output to pulse it closed.
output to pulse the actuator open, and another digital
output to pulse it closed.
FTT
Free Topology Transceiver.
IAQ
Indoor Air Quality. Refers to the quality of the air in the
conditioned space, as it relates to occupant health and
comfort.
comfort.
I/O
Input/Output; the physical sensors and actuators
connected to a controller.
I x R
I times R or current times resistance; refers to Ohms
Law: V = I x R.
K
Degrees Kelvin.
Level IV
Refers to a classification of digital communication
wire. Formerly known as UL Level IV, but not equivalent
to Category IV cable. If there is any question about wire
compatibility, use Honeywell-approved cables (see Step
5 Order Equipment section).
to Category IV cable. If there is any question about wire
compatibility, use Honeywell-approved cables (see Step
5 Order Equipment section).
L
ON
W
ORKS
Bus
Echelons L
ON
W
ORKS
network for
communication among Excel 10 Controllers.
L
ON
W
ORKS
Bus Segment
An L
ON
W
ORKS
Bus section
containing no more than 60 Excel 10s. Two segments
can be joined together using a router.
can be joined together using a router.
NEC
National Electrical Code; the body of standards for
safe field-wiring practices.
NEMA
National Electrical Manufacturers Association; the
standards developed by an organization of companies
for safe field wiring practices.
for safe field wiring practices.
Node
A Communications Connection on a network; an
Excel 10 Controller is one node on the L
ON
W
ORKS
Bus
network.
NV
Network Variable; an Excel 10 parameter that can be
viewed or modified over the L
ON
W
ORKS
Bus network.
PC
An Personal Computer with Pentium processor capable
of running Microsoft
Windows
95.
Pot
Potentiometer. A variable resistance electronic
component located on the T7770B,C or T7560A,B Wall
Modules; used to allow user-adjusted setpoints to be
input into the Excel 5000 or Excel 10 Controllers.
Modules; used to allow user-adjusted setpoints to be
input into the Excel 5000 or Excel 10 Controllers.