CEMP-E
TI 810-11
30 November 1998
SENSOR SCHEDULE
IDENTIFIER
FUNCTION
RANGE
OUTSIDE AIR TEMPERATURE
-35 TO +55 DEG C
TT-XX-01
TRANSMITTER
(-30 TO +130 DEG F)
HEATING WATER SUPPLY
38 TO 121 DEG C
TT-XX-02
TEMPERATURE TRANSMITTER
(100 TO 250 DEG F)
DUAL-TEMP RETURN WATER
-1 TO 116 DEG C
TT-XX-03
TEMPERATURE TRANSMITTER
(30 TO 240 DEG F)
CONTROL VALVE SCHEDULE
IDENTIFIER
FUNCTION
TYPE
RANGE
Kv (Cv)
CLOSE-OFF RATING
REMARKS
21 - 103 kPa
XX kPa
VLV-XX-01
2-WAY, MODULATING
XX
CONVERTER VALVE
(3-15 PSIG)
(XX PSIG)
XX kPa
DUAL-TEMP SUPPLY
VLV-XX-02
3-WAY, 2-POSITION
XX
CHANGEOVER VALVE
(XX PSIG)
XX kPa
DUAL-TEMP RETURN
VLV-XX-03
3-WAY, 2-POSITION
XX
(XX PSIG)
CHANGEOVER VALVE
OPERATING PARAMETERS
FUNCTION
SETPOINT
REMARKS
START PRIMARY PUMP AT OA TEMP = XX DEG C (XX DEG F)
OUTSIDE AIR TEMPERATURE
STOP PRIMARY PUMP AT OA TEMP = XX DEG C (XX DEG F)
XX DEG C
HEATING WATER SUPPLY
OA TEMP = -18 DEG C (0 DEG F): PRIMARY SYSTEM SUPPLY SETPOINT = 93 DEG C (200 DEG F)
TEMPERATURE
(XX DEG F)
OA TEMP = 16 DEG C (60 DEG F): PRIMARY SYSTEM SUPPLY SETPOINT = 38 DEG C (100 DEG F)
XX DEG C
DUAL-TEMP CHANGEOVER
DIFFERENTIAL = XX DEG C (XX DEG F)
(XX DEG F)
OCCUPIED MODE
MONDAY - FRIDAY : 0705 HRS - 1700 HRS
Figure 4-10i. DDC control system equipment for central plant steam dual-temperature hydronic system.
Previous Page
