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8.7 Options for Indirect Water Heater Connections
Boilers using optional tank sensor DCB-75, DCB-100 & DCB-
125 can be electrically connected to indirect storage tank as
follows:
• Connect DHW priority
on terminal block M2.
10K Ω
• Insert
NTC sensor element in the sensor well of
indirect storage tank.
• Verify exchange capacity of the indirect storage tank is
appropriate for boiler power.
• Adjust DHW temperature +95 °F...+140 °F (+35
°C...+60 °C) by pressing
Sensors used for this boiler are proprietary to
Note
the manufacturer. Use of after market sensors
will diminish boiler performance.
8.8 Use of 0-10V Input to Control Boiler Water Temperature
The functions with 0...10V regulator are activated by means of their parameters:
To enable 0-10V input change P82=4 to P82=3,
When P78=1 the input manages the heating set point temperature directly.
When P78=2 the input manages the heating power input directly.
Demand is activated above 3V and heating setpoint is calculated in proportion to deviation from 3 to 10 V DC, to give a
setpoint that goes from minimum to maximum.
Terminal # 9 is negative (-), terminal #10 is positive (+).
P78=1
Voltage
Temp Setting
°C
°F
0-3
3
25
77
4
32
90
5
40
104
6
49
120
7
57
135
8
65
149
9
73
163
10
80
176
8 - ELECTRICAL CONNECTIONS
10K Ω
sensor NTC to terminals 3-4
or
on boiler Control.
75
kW
MBH
4.9
16.6
7.3
24.9
9.7
33.3
12.2
41.6
14.7
50.0
17.1
58.3
19.5
66.6
21.2
75.0
FIGURE 8-7 Kt Indirect Storage Tank
*125 Model shown - See Application Guide for size 75, 100
A
Heating system
B
Three way diverter valve
C
Heating water flow
D
Heating supply to DHW indirect storage tank coil
E
Heating water return
F
Tank
G
Optional 10k Ω DHW priority sensor tank
P78 = 2
100/115
kW
MBH
OFF
4.9
16.6
8.4
28.9
12.0
40.8
15.4
52.4
18.5
63.1
22.2
75.7
25.3
86.2
27.4
93.6
47
125/150
kW
MBH
6.4
22.0
10.7
36.5
14.9
51.0
19.2
65.5
23.4
80.0
27.7
94.5
31.9
109.0
36.9
125.0
240013501 REV A [03/15/2022]
10K Ω Sensor
165/205
kW
MBH
8.6
29.5
14.4
49.0
19.9
68.0
25.5
87.0
31.1
106.0
36.6
125.0
42.5
145.0
48.1
164.0
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