Honeywell DHC, Service Manual

Page: 21 / 262

SDC / DHC Abbreviations
EN2H-0221GE51 R0812 21
4 Abbreviations
The following abbreviations are used in this documentation/in the
display of the control device:
RED Lowering operation BS 2 Buffer sensor 2 (bottom)
OS Outside sensor BLP Buffer loading pump
OS2 Outside sensor 2 RBP Return bypass pump
FGS Flue gas sensor RP Return pump
OT Outside temperature SD I Switching differential I
BUS System data bus SD II Switching differential II
OC1 Burner stage 1 operating hour
counter TS Tank sensor
OC2 Burner stage 2 operating hour
counter TLP Tank loading pump
DC Direct heating circuit SLS Solar loading switch-over
DCP Direct heating circuit pump SLSS Solar loading switch-over sensor
ECO Switch-off operation SFD Solar forced dissipation
EHR Electric heating rod SLP Solar loading pump
SFB Solid fuel boiler sensor STL Stratified tank loading pump
SFR Solid fuel buffer sensor VO Variable output (general)
FC Fixed-value control VO1 Variable output 1
SFP Solid fuel pump VO2 Variable output 2
PI Pulse input VI Variable input (general)
BP Boiler circuit pump VI1 Variable input 1
CC Constant control VI2 Variable input 2
CRS Collector return sensor VI3 Variable input 3
CTBS Collector tank/buffer sensor FM1 Flow sensor of mixed heating
circuit 1
CFS Collector flow sensor FM2 Flow sensor of mixed heating
circuit 2
MM Mixer motor PHE Parallel heat generator enable
MC Mixed heating circuit HG Heat generator
MHP Mixed heating circuit pump HGS Heat generator sensor
P1 Switching time program WD Wall device for room temperature
sensing
P2 Switching time program HW Hot water
P3 Switching time program CIR Circulation pump
BS Buffer sensor (top) CHP Charging pump