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Part number 550-100-325/0419
68
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler – Boiler Manual
Figure 95
120 Figure 96
155
28 DHW Settings (Combi Only)
(continued)
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
10.5
11
11.5
12
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100105
AquaBalance 120 - DHW PRODUCTION
G.P.M.
Delta T (ºF)
AquaBalance 120
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
5.5
6
6.5
7
7.5
8
8.5
9
9.5
10
10.5
11
11.5
12
12.5
13
13.5
14
14.5
15
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
Freestyle 155 - DHW PRODUCTION
Freestyle 155
Delta T (ºF)
G.P.M.
AquaBalance 155
AquaBalance 155 -
The “D” Parameter codes below are part of the normal Control Operation and typically appear during Start Up.
This a “Timed” or “Auto Recycle” event.
D1….the boiler is / has finished the call for Domestic Water heating, and is in the transition to either
standby mode or central heating mode.
D2….the boiler has reached the required water set point, and the firing has stopped / with a call for Cen-
tral Heating still applied by the T-Stat to the boiler. Circulators will continue to operate and the boiler is
monitoring the two internal water sensors (return & discharge) waiting for a water “Delta-T” to return…at
that time the boiler will re-fire if need be.
D3….the boiler has made 3 tries for ignition and has failed to ignite. A re-trial ignition cycle / delay is in
effect for 3 more tries to ignite/restart boiler operation.
Parameter Description
D1
After cycle of Domestic water mode, D1 will be displayed.
D2
When required boiler water set - point is reached D2 will be displayed.
D3
After an attempt for ignition, re-trial ignition delay is in effect (D3 is displayed).
* Check for proper fuel supply.
* Remove and check ignitor for proper gap, 5/32”, replace if disgured, check combustion setting Natural gas or LP.
* Insure condensate is draining properly.
* Insure venting size and length are correct and unobstructed.
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