Settings - Bosch SSB255 Installation And Service Manual

(*) NOTICE: The maximum amp load for each pump is 1 A
when 2 or 3 pumps are connected. For this reason, if the
power consumption of each pump is higher than 84 watt,
use a relay as shown in figure.
If just one pump is connected, the maximum amp load
of this single pump is 2 A. For this reason if the power
consumption of the pump is higher than 168 watt, use a
relay as shown in Fig. 81.
► The low voltage connections for "Primary boiler" are:
Terminal Number . Device
1-2 Cascade link
7-8 Outdoor air sensor (optional)
9-10 DHW tank sensor or Tank Thermostat (Aquastat)
11-12 Room thermostat
13-14 Supply sensor
► The low voltage connections for "Secondary boiler" are:
Terminal Number . Device
1-2 Cascade link
► The high voltage connections for "Primary boiler" are:
Terminal Number . Device
101-102-103 Boiler pump
104-105-106 CH pump
107-108-109 DHW tank pump
► The high voltage connections for "Secondary boiler" are:
Terminal Number . Device
101-102-103 Boiler pump
SSB
8 .3 .1

Settings

Set the parameters as indicated in the following table (for the parameter
list see section "5.5 Parameters list"):
No . Description Value
0
Central Heating
1
Mode
1
2 Mod Pump Mode 2
0
1
35 DHW mode
2
If CH mode is set to 1 and an outdoor air sensor is present, set the reset
curve parameter as follows (to set these values see also section "5.6
Outdoor reset"):
No . Description
19 Design Supply Temp
20 Design Outdoor Temp
21 Baseline Supply Temp
22 Baseline Outdoor Temp
23 Design Supply Min Limit
24 Design Supply Max Limit
25 Warm Weather Shutdn
Applications | 53
Comment
Outdoor air sensor not present
Outdoor air sensor present. Reset
curve activate
Enabled CH pump and DHW pump
No indirect sanitary water installed
Indirect sanitary water with sensor
Indirect sanitary water with tank
thermostat
Value (°F)
180
25
104
70
40
180
68
6720818454 (2016/02) US