Indirect Storage Tank; Management Of 0-10V Input - ECR International Dunkirk DCBF-125 Installation, Operation And Maintenance Manual

8.8 Indirect Storage Tank

Boilers DCBF-125 & 165 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 storage boiler coil is
appropriate for boiler power.
• Adjust DHW temperature +95 °F...+140 °F (+35
°C...+60 °C) by pressing
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 to
Note
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. When the function is enabled (P82=3)
and 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 the heating setpoint is calculated in proportion to deviation from 3
to 10 V DC, to give a setpoint that goes from minimum to maximum.
0-10V DC Electrical Signal Input
(V)
0...3
10
8 - ELECTRICAL CONNECTIONS
10K Ω
sensor NTC to terminals 3-4
on boiler Control.
Heating Flow Setpoint Temperature
(°F)
3
4
5 108
6 124
7 140
8 154
9 167
176
FIGURE 8-7A Kt Indirect Storage Tank
*125 Model shown
A
B
C
D
E
F
G
P78=1
(°C)
77 25
95 35
42
51
60
68
75
80
38
Heating system
Three way diverter valve
Heating water flow
Heating supply to DHW indirect storage tank coil
Heating water return
Tank
Optional 10k Ω DHW priority sensor
P78 = 2
Central Heating - Heat Input (Gross)
(kW)
OFF
4.9
8.4
12.0
15.4
18.5
22.2
25.3
27.4
240012879 REV A, [01/31/2020]
(Btu/h)
16,650
28,900
40,800
52,400
63,050
75,650
86,200
93,550