CEMP-E
TI 811-12
18 August 1998
(c)
Space dry bulb temperature - one per zone up to 40 percent of the zones per building
exposure.
(d)
Space humidity - one per zone of humidity control.
(2)
UMCS outputs to utility system.
(a) Cold deck cooling coil control valve proportional control signal (for direct digital control
implementation).
(b)
Cold deck cooling coil control valve CPA (for supervisory control implementation).
b. Software I/O requirements. The software requirements are:
(1)
Program inputs.
(a)
Zone relative humidity high limit.
(b)
Zone temperature.
(c)
Zone relative humidity (where shown).
(d)
Cold deck cooling coil discharge temperature.
(e)
Reheat coil valve positions or proportional control signal feedbacks.
(f)
Minimum space temperature during occupied periods.
(g)
Maximum space temperature during occupied periods.
(h)
Equipment constraints.
(2)
Program output. Cold deck temperature setpoint.
c. Application Notes. This program operates in conjunction with the chilled water temperature reset
program.
8. BOILER MONITORING AND CONTROL PROGRAM. Steam and hot water boiler monitoring and
control will allow for automatic central reporting of alarms, critical operating parameters, boiler selection,
remote enabling and disabling permissives for boilers and calculation of boiler efficiency. The UMCS
operator will be able to interrogate all monitored parameters for determining satisfactory boiler operation.
The operator will be prompted when an alarm condition occurs, allowing corrective action to be taken by
appropriate personnel, upon operator notification. Boiler operating data will be obtained from the
manufacturer, or developed by monitoring fuel input as a function of the steam output. Determination of
boiler efficiency also takes into account the heat content of the condensate return and make-up water.
Based on the efficiency curves, fuel inputs vs. steam output, the boilers with the highest efficiency can be
selected to satisfy the heating load. Boilers may be started manually by a boiler operator or automatically
by UMCS depending on site requirements. Burner operating efficiency is monitored by measuring the
oxygen or carbon monoxide and flue gas temperature in each boiler flue. Design requirements for this
applications program will be indicated by the letter X adjacent to the program listing on the appropriate
database table, as shown in Chapters 8 and 9.
a. Field hardware requirements. The hardware requirements are:
(1)
UMCS inputs from utility system.
(a)
Steam supply pressure - one per boiler.
7-8
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