Bosch Buderus SSB, Control Operations Manual

Page: 10 / 16

1 0 | Bosch Buderus SSB800SA | SSB1000SA | SSB1000TL Boilers Control Operations Guide
01.2020 | Bosch Thermotechnology Corp. Data subject to change
5.1.2 Central Heating Mode 1
(On/Off with Outdoor Reset using dry contacts #9 and #10)
CH Mode “1” - Boiler demand is generated thru a call for heat on low voltage
contacts #9 and #10 (dry contacts only). Boiler will target a system supply water
temperature equal to the corresponding point on the installer programmed heating
curve.
Central Heating
(CH) Mode
Description
Set these Parameters
Parameter # Description Default Range
CH Mode = “1”
On/Off with reset water
temperature
1 CH Mode 0 0 - 5
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%
19 Design Supply Temp 194°F 86 - 194°F
20 Design Outdoor Temp 23°F -13 - 77°F
21 Baseline Supply Temp 104°F 68 - 194°F
22 Baseline Outdoor Temp 68°F 32- 86°F
23 Design Supply Min Limit 86°F 39.2 – 179.6°F
24 Design Supply Max Limit 194°F 80.6 - 194°F
25 Warm Weather Shut Dn 71.6°F 32- 95°F
26 Boost Temp Increment 0°F 0 - 54°F
27 Boost Temp Delay 20 min. 0 – 120 min.
Table 5
Figure 1
Design Supply Temp
(par. #19)
Design Supply
Min Limit
(par. #25)
Boiler S
upply Temper
atur
e ºF
Outdoor Air Temperature
Baseline Supply Temp
(par. #21)
Design Supply
Max Limit
(par. #24)
Design Outdoor Temp
(par. #20)
Baseline Outdoor Temp
(par. #22)
(par. #23)