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Bosch Buderus SSB800SA | SSB1000SA | SSB1000TL Boilers Control Operations Guide
01.2020 | Bosch Thermotechnology Corp.
Data subject to change
5.1.4 Central Heating Mode 3
(Permanent set point demand)
CH Mode“3”
- Boiler demand is always “ON” in
CH Mode
3 – “Permanent Demand
Mode”. In this mode modules and CH Pump contacts will always be energized.
Night Setback Dif
(par.# 28) controls the parallel temperature shift that is applied
to the curve when #9 and #10 contacts are "open" using a clock or switch.
Central Heating
(CH) Mode
Description
Set these Parameters
Parameter #
Description
Default
Range
CH Mode = “3”
Permanent Setpoint Demand
1
CH Mode
0
0-5
3
CH Setpoint
140°F
86 - 194°F
109
Calc. Set point Offset
0 °F
-1.8 - 1.8 °F
5
Boiler pump overrun
30 sec.
0 – 900 sec.
7
CH Hysteresis up
36°F
0 - 36°F
112
CH Hysteresis down
9 °F
0 - 36°F
9
Anti-cycle period
180 sec.
10 – 900 sec.
10
Anti-cycle Temp Diff
28.8°F
0 - 36°F
14
Max Power CH
100%
50-100%
15
Min Power CH
1%
1-30%
23
Design Supply Min Limit
86°F
39.2 - 179.6 °F
24
Design Supply Max Limit
194 °F
80.6 - 194 °F
Table 7
