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8.8 Indirect Storage Tank
Boiler 1.48 GA can be electrically connected to indirect storage tank as follows:
• Connect DHW priority 10k Ω sensor NTC to terminals 9-10 on terminal block M2.
• Insert 10k Ω 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".
Sensors used for this boiler are proprietary to the manufacturer. Use of after market sensors will
diminish boiler performance.
FIGURE 8-7 Kt Indirect Storage Tank
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
3
4
5
6
7
8
9
10
240012485 REV C [06/30/2019]
NOTICE
10K Ω Sensor
P78=1
Heating Flow Setpoint Temperature
(°F)
(°C)
77
25
95
35
108
42
124
51
140
60
154
68
167
75
176
80
38
on boiler Control.
A
Heating system
B
Three way diverter valve
Heating water flow
C
D
Heating supply to DHW indirect storage tank coil
E
Heating water return
F
Tank
Optional 10k Ω DHW priority sensor tank
G
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
(Btu/h)
16,650
28,900
40,800
52,400
63,050
75,650
86,200
93,550
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