Indirect Storage Tank; Management Of 0-10V Input - ECR International Dunkirk DCBF-75 Manual

8.7 Indirect Storage Tank

Boilers DCBF - 75, 100, 125 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.
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
75
kW MBH
4.9 16.6
7.3 24.9
9.7 33.3 12.0
12.2 41.6 15.4
14.7 50.0 18.5
17.1 58.3 22.2
19.5 66.6 25.3
21.2 75.0 27.4
FIGURE 8-7 Kt Indirect Storage Tank
*125 Model shown - See Application Guide for sizes 75, 100
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
100/115
kW MBH
OFF
4.9 16.6
8.4 28.9
40.8
52.4
63.1
75.7
86.2
93.6
46
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
240013509 REV A, [03/15/2022]
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