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Wiring diagram for multiple zone with indirect tank (pump for each zone):
CASCADE
MOD
Gas
Outdoor
LINK
BUS
Switch
air sensor
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. 76
(*) NOTICE: The maximum amp load for each pump (in
addition to the boiler pump) is 1 A when 1 or 2 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.
► 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
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
N
120 V Neutral
8 .1 .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
Installation schemes | 47
Alarm
120 V Aux
120 V Main in
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 activated
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
6720818456 (2018/06) US
N
117
118
Value (°F)
180
25
104
70
40
180
68
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