Dunkirk DCBF-125 - Page 114

31
ACCESSORIES
2. 10K Ω INDIRECT STORAGE TANK SEN-
SOR KIT
Heating Only boiler can be electrically connected to
Indirect Storage Tank.
Diagram of electrical connection of external indirect
storage tank is shown below.
Connect DHW priority sensor to terminals 3 and 4 on
terminal block M2. The element of the sensor must be
inserted in the sensor well located on the indirect storage
tank.
Verify the exchange capacity of the storage boiler coil is
appropriate for power of the heating only boiler. Adjust
DHW temperature (+95°F...+140°F / +35°C...+60°C) by
pressing buttons on boiler control panel.
Note
Management of 0-10V Input
P78=1 P78 = 2
Voltage
Temp Setting 100/115 125/150 165/205
°C °F kW MBH kW MBH kW MBH
0-3 OFF
3 25 77 4.9 16.6 6.4 22.0 8.6 29.5
4 32 90 8.4 28.9 10.7 36.5 14.4 49.0
5 40 104 12.0 40.8 14.9 51.0 19.9 68.0
6 49 120 15.4 52.4 19.2 65.5 25.5 87.0
7 57 135 18.5 63.1 23.4 80.0 31.1 106.0
8 65 149 22.2 75.7 27.7 94.5 36.6 125.0
9 73 163 25.3 86.2 31.9 109.0 42.5 145.0
10 80 176 27.4 93.6 36.9 125.0 48.1 164.0
Parameter PO3 for Heating Only boiler, with no
indirect tank remains Factory Set at 08. No change
is required.
If adding an Indirect Tank with a sensor to
Heating Only Boiler - change PO3 parameter
from 08 to 05.
If adding an Indirect Tank with a thermostat to
Heating Only Boiler - change PO3 parameter
from 08 to 04.
See Section 9, Parameter Settings, in boiler’s
Installation, Operation, and Maintenance Manual.
Parameter PO3 for COMBI boiler factory set at OO
requires no change.
Electrical Connection
Heating Only Boiler
Indirect DHW Tank
End Switch Wiring
(100,125 & 165
MODELS)
Electrical Connection
Heating Only Boiler
10
9
8
7
6
5
4
3
2
1
S
Indirect DHW Tank
Sensor Wiring
(100 & 125 MODELS)
10k Ω
10
9
8
7
6
5
4
3
2
1
To activate the 0-10v function parameter 82 must be set to 3.
There must be at or above 3 V DC present for the control to recognize a call for heat.
When P78 = 1 the 0-10v input manages CH heating setpoint directly per chart below.
When P78 = 2 the 0-10v input manages CH heating input directly per chart below.
When P78 = 0 Disabled
PN 240012875 REV. B [07/01/2021]