Honeywell AUTOMATIC CONTROL Engineering Manual page 404

CHILLER, BOILER, AND DISTRIBUTION SYSTEM CONTROL APPLICATIONS
DISTRIBUTION
TI
01
OUTSIDE AIR
PI
11
PSF
Y
14
PI TIC
17
PRF
Fig. 140. DDC Control of Two-Stage Heat Exchanger for Domestic Hot Water and Heating.
ENGINEERING MANUAL OF AUTOMATIC CONTROL
QIR
02
TIC PI
ELEC. POWER
21 22
Y Y
27 26
TI
12
M
HEX1
QIR
16 15
HEX2
SUBSTATION
DDC
Y
23
M
Y
25
TIC PI
215 24
Y
13
M
HEX3
Y
Y
38
310
M
Y
39
QIR PI
214 213
394
CONSUMER
CENTRAL
SYSTEM
DHW
DHW
RECIRCULATED
Y
31
TIC PIC
32 33
M
SSF
Y
37
Y
36
SRF
PIC TIC
35 34
Y
29
Y
210
COLD WATER
PI
Y
28
211
Y
212
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