Honeywell EXCEL 5000 User Manual page 65

EXCEL CARE CONTROL ICONS
MAX Temperature Controller
Minimum limitation with regenerative transfer operation:
Module 5 Moisture Recovery
This module functions the same as Module 4 except that it calculates a signal from
the humidity controller (X2). The module outputs continuous positioning signal YF.
Module 6 Selection Logic
This module evaluates the results from Modules 1 through 5 and decides whether to
transmit positioning signal YT or YF to output Y of the ECO control icon. The
following table summarizes module logic.
Need Need
for for Reduce
Heating Cooling Humidity
0 1 0
0 1 1
1 0 0
1 0 1
A zero in the table indicates no need. A one indicates a need.
MAX indicates selection of the maximum of either the YT or YF signal for the Y
signal.
MIN indicates selection of the minimum of either the YT or YF signal for the Y signal.
In a partial air conditioning system (only temperature control), this module just sends
the YT signal from Module 4 to output Y.
The following diagrams illustrate table output (MIN and MAX for temperature and
humidity).
h AL >h AbL
Cooling
Increase more
Humidity expensive expensive
1 MAX
0 MAX
1 MIN
0 MAX
67
ALPHABETIC REFERENCE
h AL <h AbL
Heating Cooling
more more
expensive expensive
MAX MIN
MAX MIN
MIN MAX
MIN MIN
74-5577–33 (US)
EN2B-0184 GE51 R0518 (Europe)
Heating
more
MIN
MIN
MAX
MAX