Parameter List

Table 21.   Heating Strategy Parameter List

Description

Value Range

Default Value

Unit

CFG-01: control mode configuration:

0; 1 = system supply temperature control

2 = system return temperature control

3 = maximum of system supply and return temperature control

0;1...3

3

-

CFG-02: maximum number of redundant heat generators

0/ 1

0

-

SST-01: minimum supply temperature

0...500

10

°C

SST-02: maximum supply temperature

0...500

90

°C

SST-03: setpoint raise

0...50

5

K

SST-04: maximum setpoint increment per minute

1...1000

25

K

SST-05: minimum heat demand to start heat generators

0...150

20

°C

SST-06: P-band following stages control

1...2000

100

K

SST-07: I-time following stages control

0...3600

90

sec

SST-08: forward time expected system supply temperature (DISP-05)

0...60

3

min

SST-09: time to reach setpoint

1...600

6

min

SST-10: control region following stages

1...20

5

K

SST-11: temperature span switching on boilers

2...30

20

K

SST-12: temperature span switching off boilers

2...30

10

K

OPM-01: optimized off; 0 = never

0…2500

0

 min

OPM-02: group 1 operation mode:

0; 1 = sequential

2 = sequential mode, last two boiler switch off in parallel mode

3 = parallel

0...3

1

-

CYC-01: cyclic changeover sequence; e.g. 0203 mean the boilers 2 to 3 will perform cyclic changeover. Boiler 1 is the leading boiler.

1516

0116

-

OAT-01: low limit outside air temperature to enable the next boiler

-50 ... 50

-10

°C

OAT-02: high limit outside air temperature to disable the next boiler

-50 ... 50

0

°C

OVR-01: high limit control deviation to enable the next boiler

10 ... 100

30

K

OVR-02: low limit control deviation to disable the next boiler

0 ... 50

15

K

OVR-03: switch on delay overrides

0 ... 480

0

min

OVR-04: switch off delay overrides

0 ... 480

0

min

SYS-01: continuous flow enabled (see table below)

0…2

0

-

SYS-02: continuous flow switch off delay

0000...2400

0100

hhmm

SYS-03: leading boiler holds the setpoint output

0/ 1

0

-

DISP-01: number of heat generators

-

-

-

DISP-04: calculated time to reach setpoint

-

-

min

DISP-05: expected system supply temperature of SST-08

-

-

°C


Table 22.   Continuous flow mode

SYS-01

Continuous flow mode

0

no continuous flow

1

unconditional continuous flow

2

a) continuous flow for a time defined by SYS-02 hours after the last heat demand occurred

b) continuous flow if “FilteredOATemp” < 2 °C (fixed, with 1K switching differential), independent of any heat demand