Siemens BACNET 125-699 - Manual (Page 21)

Applications
Siemens Building Technologies, Inc. 13
4. In this application, the maximum configurations are as follows:
• The maximum of CMP TOTL = 3.
• The maximum of EHTG STG CNT = 3.
• The maximum of CMP TOTL plus EHTG STG CNT = 4.
If these limits are exceeded, CMP TOTL will be set to 0 and EHTG STG CNT will be set
to 0. These points will remain at 0 until they are set correctly. This prevents the
application from trying to use the same DO as both a compressor and a stage of electric
heat.
FLN TRUNK
AO1 (0-10V)
DO1
DO2
DO3
DO4
DO5
DO6
DO7
DO8
DI3/AI3
DI4/AI4
DI5/AI5
DI2
DI6
AO2 (0-10V)
AO3 (0-10V)
RTS
N.O.
HEAT PUMP
CONTROLLER -
MULTI-STAGE
RTS
TEC2573CDR1
FAN
WALL
SWITCH
(OPTIONAL)
ELECTRIC
HEAT
(OPTIONAL)
COIL
HEATING /
COOLING
COIL WATER
SOURCE
COMPRESSOR 3
REVERSING
VALVE
SUPPLY AIR
O.A.
N.C.
R.A.
1ST STAGE ELECTRIC HEAT (OPTIONAL)
REVERSING VALVE
COMPRESSOR 1
COMPRESSOR 2; OR 3RD STAGE ELECTRIC HEAT (OPTIONAL)
COMPRESSOR 3; OR 2ND STAGE ELECTRIC HEAT (OPTIONAL)
FAN
SPARE AI (0-10V or 4-20mA) OR SPARE DI (DRY CONTACT)
SPARE AI (10K THERMISTOR) OR SPARE DI (DRY CONTACT)
MIXED AIR TEMPERATURE SENSOR 10K THERMISTOR (OPTIONAL)
HEAT PUMP ALARM (OPTIONAL)
N.O.
* THE O.A. AND R.A. DAMPERS MUST
BE MECHANICALLY LINKED.
R.A.
DAMPER*
(OPTIONAL)
MIXED AIR
TEMPERATURE
SENSOR
(OPTIONAL)
COMPRESSOR 1
REVERSING
VALVE
COIL
COMPRESSOR 2
REVERSING
VALVE
COIL
COIL
COIL
O.A.
DAMPER*
(OPTIONAL)
24 V-AC
*
ON BOARD, AO1 IS GROUPED PYSICALLY WITH AO2 AND AO3 *
Figure 5. Application 2583 Control Drawing.