Honeywell AUTOMATIC CONTROL SI Edition User Manual

ENGINEERING MANUAL OF AUTOMATIC CONTROL
CHILLER, BOILER, AND DISTRIBUTION SYSTEM CONTROL APPLICATIONS
350
Fig. 74. Single Pump, Pressure Bypass, Direct Return at Full and Half Flow.
Fig. 75. Single Pump, Pressure Bypass System at 90 percent Flow.
78
145.5
RETURN
HEAT/
COOL
COIL
1
V1
B1
HEAT/
COOL
COIL
2
V2
B2
HEAT/
COOL
COIL
3
V3
B3
HEAT/
COOL
COIL
4
V4
B4
HEAT/
COOL
COIL
5
V5
B5
HEAT/
COOL
COIL
6
V6
B6
PUMP
ZERO
REFERENCE
CHILLER
12 L/s
PER
AHU COIL
96
150
108
153
36
9
PD
24
6
PD
12
3
PD
144
162
0
12
3
12
3
PD
36
9
PD
24
132
PD
48
12
72
144
30
7.5
54
139.5
0
0
PD
24
132
PD
30
7.5
18
4.5
PD
18
4.5
PD
TOP NUMBERS = FULL FLOW
BOTTOM NUMBERS = HALF FLOW, EACH COIL
PD = PRESSURE DROP IN kPa
NUMBERS IN CIRCLES = GAUGE PRESSURES (kPa)
(PUMP INLET = ZERO kPa FOR SIMPLICITY)
24
6
PD
M15286
18 kPa DROP TOTAL
RETURN
SYSTEM STRAINER
HEAT/
COOL
COIL
1
V1
B1
HEAT/
COOL
COIL
2
V2
B2
HEAT/
COOL
COIL
3
V3
B3
HEAT/
COOL
COIL
4
V4
B4
HEAT/
COOL
COIL
5
V5
B5
HEAT/
COOL
COIL
6
V6
B6
PUMP
SUPPLY
9.3 kPa DROP
9.3 kPa DROP
*DP SETPOINT =103.5 kPa
CHILLER
27.9 kPa
DROP
SYSTEM WITH 90% FLOW THROUGH EACH COIL
11 L/s
PER
AHU COIL
*DIFFERENTIAL PRESSURE CONTROLLER SETPOINT = 150 kPa - 27.9 kPa - 9.3 kPa - 9.3 kPa = 103.5 kPa
DP
M15287
66 L/s
150 kPa

Honeywell AUTOMATIC CONTROL SI Edition Specifications

General

Brand	Honeywell
Model	AUTOMATIC CONTROL SI Edition
Category	Control Systems
Language	English