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8.8 Indirect Storage Tank
Boilers MAH-100, MAH-125 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".
Model 165 Use aquastat for Indirect Tank
Note
Control.
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:
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 terminals 3-4
or
on boiler Control.
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 size 100
A
Heating system
B
Three way diverter valve
C
Heating water flow
D
Heating supply to DHW indirect storage tank coil
E
Heating water return
F
Tank
G
Optional 10k Ω DHW priority sensor tank
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
45
10K Ω Sensor
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
240013354 REV A [07/01/2021]
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