CHAPTER3
SEQUENCE OF OPERATION
MNEMONIC
DESCRIPTION
MNEMONIC DESCRI
Pll
ON
p
S (Cont'd)
p
Denote. Propene Gas Equipment
(Prefile)
ss
S.Mtdor Switch
PAASV
Rant
Ak
Atomizing Sdenotd Valve
sse
Sequencing Step Controller
PAPS
Purge
AJI
Pro~
Switch
SSl
Safety Shutdown Light
PC
Pump
Con11'01
SSR
Solid
Stat.
Relay
PCL
Purge Complete
~t
STHWC
Surge Tank High Water C4ntrol
PCR
Pump
Contro4
ReM!y
STHWL
Surge Tank High Water Light
PFCC
Power
Fec:tor
Correction Capacitor
STHWR
Surge Tank High Water Relay
PFFL
Pilot Flame Failure Light
sn.wc
Surge Tank
Low
Water
Contro4
PFPS
Politlw Furnace Preeaure Switch
STl..Wl
Surge Tank Low Water Ught
PHGPS
Pilot High Gas Preeaure Switch
STl..WR
Surge Tank
low
Watsr Relay
P1Pl
Purge
in
Progreee Ught
P1S
Pilot Ignition
Switch
T
PLC
Programmable Logic Controller
PLGPS
Pilot
low
Gas
PT'eeaure
Swftcn
POl
Power On Ught
POV
Pilot
Oil
Valw
PPL
Poet
Purge Ught
PPR
Poet
Purge
ReM!y
PPTO
Post Purge
lime
Delay
PR
Program
Relay
PRL
Purge
Ready Ught
PS
Power Supply
PSF
Power
Supply
Fuse
PSS
Pump
Selector Switch
PSN
Purge
So4enoid
Valw
(T.C.)
limed
Ooeed
(T.O.)
Tmed
Open
T8
T enninal
Block
T/C
'Thennocouple
TO
lime
Delay
TOAS
Ttme
Delay Auxiliary Switch
TPL
Transfer
Pump
Light
TPM
Transfer Pump
MotOf
TPMCB
Transfer
Pump
MotOf
Circuit Breaker
TPMF Transfer
Pump
MotOf
Fusee
TPMS
·
Transfer Pump
MotOf
Starter
TPS
.
Transfer
Pump
Switch
PT
Purgelimer
FTS
Pump
Transfer Switch
u
lNFO
Utra-Violet Flame Detector
R
R
Red
(Color
of
Pilot Ught)
v
RAR
Remote
Alarm
Relay
VM
Volt Meter
AATO
Remote
Alarm
rme
Delay
RES
Resistor
w
RS
Range
Switc:n
RTO
Ae&Jatance
Temperature
Deted:Of
w
White
(C41or
of
Pilot
Light)
we
Water
C41umn
s
WCBDS
Wawr Column Blow
Down
Switch
WFNL
Water Flow Normal Ught
SBFPL Stand
BY
Feed
Pump
Ught
WLC
Water
level
Control
SBFPM
Stand
By
Feed
Pump
Motor
wo
OenotAIS
Waat4 Oil Equipment
(Prefix)
SBFPMCB
Stand
By
Feed
Pump
Motor
Ciroutt
Breaker
WTS
wau,r Temperature Sensor
SBFPMF
Stand
By
Feed
Pump
Motor Fusee
SBFPMS
Stand
By
Feed
Pump
Motor Starter
SBOV
Surlace
~ow
OH
Valve
SBPS
Sootblower Pree8w'e Switch
SBR
Sootblower Relay
sc
Scanner
SCTS
SupeNieoty
Cock
Test
Swttc:n
SOL
Steam
Demand Ught
SHT
Steam Heater Thennostat
SHV
Steam Heater Valve
SLCL
Setety Limits Complete Light
SPIR
System
Pump
lnteriock Relay
SPS
Steam Presll.ure Senaor
750
..
150
CHAPTER
3...S
To Next Page
Loading...
