CHAPTER3 SEQUENCE OF OPERATION
MNEMONIC
DESCRIPTION
E
EDS
Emergency
Ooof'
Switch
ESS
Emergency Stop Switch
ETM
8apMd
Time Meter
F
FAOI
Frean
AJr
Damper lnter1odc
FADM
Freeh.
Ak
Camper
Motor
FAOR
Fteeh
AJr
Damper
Ae4ay
FCIPL
Fuel
Chengeowr
In Prcgreu. Ught
FD
Flame Detector
FDJS
Aame
Oetec::tor
Jundion
Box
FOPS
Flow Differential Preeaure
Switch
FFA
Flame
Failure
AJatm
FFl
Aame
Failure
Ught
FFR Flame F
aiJure
R.May
FGA Flue
Gas
Recirculation
FMS
Firing
Mode
Switch
FOAS
Firat
Out
Reset Switch
FPM
Feed
Pump
Mo'&or
FPMS
Feed Pump
Motor
Starter
FRI
Firing
Rate
Interlace
FS
Flow Switch
FSS
Fua
Selector Switch
FSSM
Aame
~gnal
Strength
Meter
FVEL
Fua
V8Ne Energized Ught
FVL
Fuel Vaive
Ught
FVR
Fua
Vaive Relay
F'NC
Feed
WatM
Conirol
FWVAS
Feed
WatM
V8Ne Auxiliary
Switch
FWVT
Feed
Wafl!llf V8Ne Transformer
G
G
Green (Color
of
p;fot Ught)
GCAS
Gsa
Cock
Auxiliary Switch
GCS Gaa
Cock
Switch
GGL
Gauge
Glasa
Ught
OOL
Gaa Operation
Ught
OOR
Gaa-
Oil
Ae4ay
GOS
Gaa-
Oil
Switch
GPS
Gaa Presaure Senaor
GPV
Gsa
Pilot
vaNe
GPW
Gaa
p;fot
Vent
Valve
GSSV
Gaa
Seneor Solenctd V
aJve
GVEL
Gaa
Valve Energized
Ught
GVTS
Gaa
Valve Test Switch
H
HATC
Hgh
Ambient Temperature Con1rol
HSWTL
Hgh
Boiler
WafM
Temperature
Ught
HFAV
Hgh
Fire
Air
V
e.Ne
HFGV High Fire Gaa Vahle
HFOV
Hgh
Fire 01 Ve.Ne
HFPS
Hgh
Furnace Preaaure Switch
HFS
Hgh
Fire Switch
HFS-A
Hgh
Fire Switch -
Air
HGPL
Hgh
Gu
Pressure Light
HGPA
Hgh
Gu
Pressure
~lay
750-150
MNEMONIC DESCRIPTION
HGPS
HILWA
H..
H..C
H..FC
H..PC
H..TC
HMO
HOPl
HOPA
HOPS
HOLC
HOTL
HOTA
HOTS
HPCO
HSPC
HSPL
HSPA
HSTC
HSTL
HSTS
HWAA
HWC
HWCO
HWL
o.c.)
o.o.)
IL
IM
INT
rT
H (Cont'd)
High Gaa Preeeute Switch
Hgh
Low
Water Alarm
HeaWUght
High
Umit
Conirol
1-igtH.ow
Fire
Conirol
High
Umit
Pree.Jre
Control
Hgh
Limit
Temperature Control
Header
Modulating Controt
High
OW
Pree.Jre
Ught
Hgh
Oil Preeeure
Ae4ay
High Oil Praeaure Switch
Header Operating Umit
Contro4
Hgh
OW
Temperawre
Ught
Hgh
OW
Temperature Relay
Hgh
Oil
Temperature Switch
High Preeaure Cutoff
High
Steam Preeaure Control
Hgh
Steam Presaure
Ught
High Steam Preaeure Relay
High Stack
Temperature Con1rol
High
Stack Temperature
Ught
High Stack Temperature Switch
Hgh
WatM
Alarm
Relay
Hgh
WatM
Con1rol
Hgh
WatAr Cutoff
High WatAr
Ught
lnstantaneoua
Cloaed
lnatantaneoua Open
lgrdticn Ught
Ignition Module
Interval (Timer)
Ignition Transformer
J
..PP Jackahatt Position Potentiometer
LAMPS
LASPS
LCR
LDL
LOPS
LOS
LFAV
LFGV
LFHTO
L.Ft.
LFOV
LFPS
LFR
LFS
LFS-A
LFS-F
L
Low Atomizing Media Pressure Switch
Low Atomizing
S1eam
Preaaure Switch
Umit Circuit Relay
Load
Demand Light
Low Differential Preaeure Switch
Low Draft Switch
Low
Fire
Air
Valve
Low Fire
Gu
Ve.ive
Low Fire Hold
1ime
Delay
Low Fire Ught
Low Fire Oil Valve
Low
Fire
Prei!IISUre
Switch
Low Fire Relay
Low Fire Switch
Low Fire Switch - Air
Low Fire Switch - Fuel
CHAPTER
3...J
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