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APPENDIX
Abbreviations
A55 M2 board. Main controller board for RTU
A59 C2 board. Second compressor add-on board
A133 GP1 Board. General purpose add-on board DIP selects 3 functions
AI Analog input
AO Analog output
BL Blower
BRPM Blower RPM
C2 2nd compressor add-on board (A59)
C1 1st stage cooling
C2 2nd stage cooling
C3 3rd stage cooling
C4 4th stage cooling
CAI Combustion air inducer
CAVB Constant air volume with bypass damper
COM Electrical common
CLK Clock
CP1 Compressor 1
CP2 Compressor 2
CP3 Compressor 3
CP4 Compressor 4
CSP Cooling setpoint
DAC Discharge (supply) air control
DACC Discharge (supply) air control cooling
DACH Discharge (supply) air control heating
DAP Discharge (supply) air pressure
DAT Discharge (supply) air temperature
DB Deadband
DCV Demand controlled ventilation
DDC Direct Digital Controller
DI Digital input
Diff Differential
DIP DIP switch
DPOS Damper position
DO Digital output
ECON Economizer
ECTO Electronic configure to order (control parameters)
FAC Fresh air cooling control
FAH Fresh air heating control
FAT Fresh air tempering control. See FAC & FAH
FC Free cooling
G Thermostat demand, blower
GLO Global mode or input (economizer)
GP1 General purpose board GP1-1 (A133)
H1 1st stage heating
H2 2nd stage heating
H3 3rd stage heating
H4 4th stage heating
HP1 Heat pump add-on board (A61)
HP High pressure
HSP Heating setpoint
HT Heating
IAQ Indoor air quality. Often synonymous with CO
2
level in ppm
IDE Indoor enthalpy. Depends on temperature and humidity
IE Indoor enthalpy.
“w.c. Inches of water column
LCONN L Connection
LED Light emitting diode. An indicator light, found either as individual
elements or grouped together as segments to form characters
LP Low pressure
LT Limit
M2 Main M2 unit controller board (A55).
MCB1 Motor control board
MGV Modulating gas valve
MOAD Motorized outdoor air damper
MSAV Multi Stage Air Volume
OAC Outdoor air control
OAS Outdoor air suitable for free cooling
OAT Outdoor air temperature
OCP Thermostat demand, occupied mode
ODE Outdoor enthalpy. Depends on temperature and humidity
OE Outdoor enthalpy.
PID Proportional, integral and derivative based control loop
PPM Parts per million (mostly used for CO
2
measurements)
RAP Return air pressure
RAT Return air temperature
RH Relative humidity
RS Reset
RTU Roof top unit
RT6 Discharge air temperature sensor
RT16 Return air temperature sensor
RT17 Outdoor air temperature sensor
SMK Smoke detection mode (alarm)
SP Setpoint
Stg Stage
STPT Setpoint
TB Terminal block
TSTAT Thermostat
UNOCP Unoccupied
USB Universal Serial Bus, connect to PC or flash drive
W1 Thermostat demand, heat stage 1
W2 Thermostat demand, heat stage 2
W3 Thermostat demand, heat stage 3
W4 Thermostat demand, heat stage 4
VAC Alternating current voltage
VAV Variable air volume. Accomplished with a variable frequency drive
(VFD)
VDC Direct current voltage
VFD Var. frequency drive. An AC inverter used to vary motor speed
VT Ventilation
Y1 Thermostat demand, cooling stage one
Y2 Thermostat demand, cooling stage two
Y3 Thermostat demand, cooling stage three
Y4 Thermostat demand, cooling stage four
ZAT Zone air temperature
Table 7. Service parts available for Prodigy
®
Controller
Description
Catalog
number
Description
Catalog
number
Description
Catalog
number
M2 Unit Controller Replacement kit 59W47 M2 USB service kit tube 59W52 M2 Training board (no suitcase,
USB, or M2)
59W56
DB1-1 M2 Display Replacement kit 59W49 M2-1 Display battery (10-pack) 59W53 SmartWire Field Termination kit 59W57
MCB1 M2 Motor Control Replace
ment kit
59W50 M2-1 Fuse (2-Amp ATC, 5-pack) 59W54 Lennox Prodigy USB Memory Stick
(5-pack)
59W59
M2 BACnet Replacement kit 59W51 M2 Deluxe Training kit (suitcase,
UC, USB kit, expert manual, M2,
trainer)
59W55 Service Software & Expert Manual
on USB
59W60
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