CleaverBrooks FLX Operation, Service And Parts Manual page 71

Sequence Of Operation
MNEMONIC
LLPR Low Limit Pressure Relay
LLR Lead Lag Relay
LLTC Low Limit Temperature Control
LLTR Low Limit Temperature Relay
LOPL Low Oil Pressure Light
LOPR Low Oil Pressure Relay
LOPS Low Oil Pressure Switch
LOTL Low Oil Temperature Light
LOTR Low Oil Temperature Relay
LOTS Low Oil Temperature Switch
LPAPS Low Plant Air Pressure Switch
LPCO Low Pressure Cutoff
LPS Low Pressure Switch
LSPAR Low Steam Pressure Alarm Relay
LSPC Low Steam Pressure Control
LSPL Low Steam Pressure Light
LSPR Low Steam Pressure Relay
LSPS Low Steam Pressure Switch
LTS Lamp Test Switch
LWA Low Water Alarm
LWAR Low Water Alarm Relay
LWCO Low Water Cutoff
LWFL Low Water Flow Light
LWL Low Water Light
LWR Low Water Relay
LWRR Low Water Reset Relay
MA Milli-amp
MAS Manual - Automatic Switch
MAM Micrometer
MC Modulating Control
MCS Manual Control Switch
MDM Modulating Damper Motor
MDMAS Modulating Damper Motor Auxiliary Switch
MFC Manual Flame Control (Potentiometer)
MFGRTS Minimum Flue Gas Recirculation Temperature Switch
MFVL Main Fuel Valve Light
MFWV Motorized Feed Water Valve
MGV Main Gas Valve
MGVAS Main Gas Valve Auxiliary Switch
MGVEL Main Gas Valve Energized Light
MGVV Main Gas Vent Valve
MLC Modulating Level Control
(MOM) Momentary
MOV Main Oil Valve
MOVAS Main Oil Valve Auxiliary Switch
MOVEL Main Oil Valve Energized Light
MPC Modulating Pressure Control
MPCB Main Power Circuit Breaker
MPP Manual Positioning Potentiometer
(MR) Manual Reset
MTC Modulating Temperature Control
MVA Make-Up Valve Actuator
N Denotes Natural Gas Equipment (Prefix)
(N.C.) Normally Closed
(N.O.) Normally Open
NFL No Flow Light
750-177
DESCRIPTION
M
N
Figure 4-1: Electrical Nomenclature (Continued)
MNEMONIC
NFR No Flow Relay
NGHPV Natural Gas Housing Purge Valve
ODA Outlet Damper Actuator
ODM Outlet Damper Motor
ODMAS Outlet Damper Motor Auxiliary Switch
ODMT Outlet Damper Motor Transformer
ODS Oil Drawer Switch
OH Oil Heater
OHCB Oil Heater Circuit Breaker
OHF Oil Heater Fuses
OHR Oil Heater Relay
OHS Oil Heater Switch
OHT Oil Heater Thermostat
OLC Operating Limit Control
OLPC Operating Limit Pressure Control
OL'S Thermal Overloads
OLTC Operating Limit Temperature Control
OMPM Oil Metering Pump Motor
OMPMF Oil Metering Pump Motor Fuse
OOL Oil Operation Light
OPM Oil Pump Motor
OPMCB Oil Pump Motor Circuit Breaker
OPMF Oil Pump Motor Fuses
OPMS Oil Pump Motor Starter
OPPM Oil Purge Pump Motor
OPR OIl Purge Relay
OPRL Oil Pump Running Light
OPRS Oil Pressure Sensor
OPS Oil Pump Switch
OPSPM Oil Pump Supply Pump Motor
OPV Oil Purge Valve
OR Oil Relay
ORV Oil Return Valve
OSOV Oil Shutoff Valve
OSPS O2 Set Point Switch
OSS Oil Selector Switch
OT Outdoor Thermostat
OTS Oil Temperature Sensor
OV Oil Valve
OVAS Oil Valve Auxiliary Switch
OVEL Oil Valve Energized Light
P Denotes Propane Gas Equipment (Prefix)
PAASV Plant Air Atomizing Solenoid Valve
PAPS Purge Air Proving Switch
PC Pump Control
PCL Purge Complete Light
PCR Pump Control Relay
PFCC Power Factor Correction Capacitor
PFFL Pilot Flame Failure Light
PFFR Pilot Flame Failure Relay
PFPS Positive Furnace Pressure Switch
PHGPS Pilot High Gas Pressure Switch
PIPL Purge in Progress Light
PIS Pilot Ignition Switch
PLC Programmable Logic Controller
PLGPS Pilot Low Gas Pressure Switch
Chapter 4
DESCRIPTION
O
P
4-7