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8.8 Indirect Storage Tank
Boilers DCBF- 100, 125, & 165 can be electrically
connected to indirect storage tank as follows:
• Connect DHW priority
terminals 3-4 on terminal block M2.
10K Ω NTC sensor element in the sensor
• Insert
well of indirect storage tank.
• Verify exchange capacity of the storage boiler coil is
appropriate for boiler power.
• Adjust DHW temperature +95 °F...+140 °F (+35
°C...+60 °C) by pressing
Control.
IMPORTANT: set parameter P03 = 05 as described in:
"PARAMETER SETTINGS".
* See "Application Guide" for details on using a DHW
tank aquastat.
Sensors used for this boiler are proprietary
Note
to the manufacturer. Use of after market
sensors will diminish boiler performance.
8.9 Management of 0-10V Input
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
on boiler
100/115
kW
MBH
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
FIGURE 8-7 Kt Indirect Storage Tank
*125 Model shown - See Application Guide for sizes 100 & 165
A
Heating system
B
Three way diverter valve
C
Heating water flow
Heating supply to DHW indirect storage tank
D
coil
E
Heating water return
F
Tank
G
Optional 10k Ω DHW priority sensor
P78 = 2
125/150
kW
MBH
OFF
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
44
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
240013375 REV A, [07/01/2021]
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