Settings - Bosch SSB255 Installation And Service Manual

Wiring diagram for multiple zone with indirect tank (valve for each zone):
CASCADE MOD Gas Out
LINK BUS Switch Door
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Outdoor sensor
(5)
DHW tank sensor
or
Aquastat
Zone relay switch
Fig. 77
(*) NOTICE: The maximum amp load for each pump is 1
A (with a cosφ 0.7) 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 with a cosφ 0.7. For this reason if
the power consumption of the pump is higher than 168 watt,
use a relay as shown in figure.
► Connect the following low voltage connection:
Terminal Number . Device
11-12 Zone relay end switch
9-10 DHW tank sensor or Tank Thermostat (Aquastat)
7-8 Outdoor air sensor (optional)
► Connect the following high voltage pin:
Terminal Number . Device
101-102-103 Boiler pump
107-108-109 DHW tank pump
SSB
DHW Tank Room Supply
Sensor Thermostat Sensor
L
101 102 103 104 105 106 107 108 109
(4)
(1)
L
Boiler pump
(2)
Boiler Pump CH Pump DHW
Pump
GND
GND
N
L
GND
L N
N
3 Way
GND
L
N
Relay (*)
Furnished
and
Installed
by others
N
120 V Neutral
8 .2 .1

Settings

Set the parameters as indicated in the following table (for the parameter
list see section "5.5 Parameters list"):
No . Description
Central Heating
1
Mode
2 Mod Pump Mode
35 DHW mode
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 .
19
20
21
22
23
24
25
Applications | 49
120 V Main in
Alarm 120 V Aux
GND GND GND
N N
L L L
110 111 112 113 114 115
116
Relay (*)
Furnished and
Installed by others
DHW tank pump
(3)
120 V Line
Ground
Value Comment
0 Outdoor air sensor not present
Outdoor air sensor present. Reset
1
curve activate
2 Enabled CH pump and DHW pump
0 No indirect sanitary water installed
1 Indirect sanitary water with sensor
Indirect sanitary water with tank
2
thermostat
Description
Design Supply Temp
Design Outdoor Temp
Baseline Supply Temp
Baseline Outdoor Temp
Design Supply Min Limit
Design Supply Max Limit
Warm Weather Shutdn
6720818454 (2016/02) US
N
117 118
Value (°F)
180
25
104
70
40
180
68