Options For I Ndirect Water Heater Connections; Use Of 0-10V I Nput To Control Boiler Water Tem Perature - ECR International COMBI 115 Installation, Operation And Maintenance Manual
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Also See for COMBI 115:
- User's information manual (8 pages) ,
- User's information manual (8 pages)
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8 .7 Opt ions for I ndirect W a t er H ea t er Connect ions
Heat only boiler models 75, 100 and 125 using an optional
tank sensor can be electrically connected to indirect storage
tank as follows:
• Connect DHW priority
on terminal block M 2 .
1 0 K Ω NTC sensor element in the sensor well of
• I nsert
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
N o t e
the manufacturer. Use of after market sensors
will diminish boiler performance.
8 .8 Use of 0 - 1 0 V I nput t o Cont rol Boiler W a t er Tem pera t ure
The functions with 0...10V regulator are activated by means of their parameters:
To enable 0-10V input change P8 2 = 4 to P8 2 = 3 ,
When P7 8 = 1 t he input m anages t he heat ing set point t em perat ure direct ly.
When P7 8 = 2 t he input m anages t he heat ing power input direct ly.
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 (+).
P7 8 = 1
Voltage
Temp Setting
°C
°F
0-3
3
25
77
4
32
90
5
40
104
6
49
120
7
57
135
65
149
8
9
73
163
10
80
176
8 - ELECTRI CAL CON N ECTI ON S
1 0 K Ω sensor NTC to terminals 3 - 4
or
on boiler Control.
7 5
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
FI GURE 8 - 7 Kt I ndirect St ora ge Ta nk
*125 Model shown - See Application Guide for size 75, 100
A
Heating system
B
Three way diverter valve
Heating water flow
C
Heating supply to DHW indirect storage tank coil
D
DHW return
E
F
Heating water return
Tank
G
Optional 10k Ω DHW priority sensor tank
H
P7 8 = 2
1 0 0 / 1 1 5
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
4 7
1 2 5 / 1 5 0
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
240013687 REV A [ 09/ 01/ 2022]
1 0 K Ω Sensor
1 6 5 / 2 0 5
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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