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Figure 80
10
Part number 550-100-325/0419
62
AquaBalance
®
Series 2 Wall Mount Gas-fired Water Boiler – Boiler Manual
27 Controls and operation
Control Introduction
This boiler is a high-efficiency condensing pre-mix appliance
for central heating and hot water production, running on
Natural gas or Liquefied Petroleum (Propane) gas, generating
extremely low emissions.
The boiler is constructed with a stainless steel heat exchanger
providing effective condensation of the water vapor contained
in the flue gases, permitting extremely high efficiency.
Inside the boiler there is a premix burner with a large stainless
steel surface.
The boiler is sealed from the installation room: the air needed
for combustion is drawn from outside. The boiler also includes a
gas valve, pump, safety valve, flow sensor, dual safety and control
temperature sensor, a safety thermostat and a low water pressure
switch.
Thanks to the microprocessor control and adjustment system
with advanced self-diagnosis, unit operation is for the most part
automatic. The system heating temperature is automatically
governed by the control system.
The display continuously provides information on the unit’s
operating status and it is easily possible to obtain and adjust
temperature set-points, etc. or configure them. Any operating
problems associated with the boiler are immediately signalled by
the display and, if possible, corrected automatically.
LEGEND for Figure 80
1 — Domestic Hot Water temperature setpoint decreasing
button
2 — Domestic Hot Water temperature setpoint increasing
button
3 — Central Heating Water temperature setpoint decreas-
ing button
4 — Central Heating Water temperature setpoint increasing
button
5 — LCD Display
6 — Reset / OTC button
7 — Economy-Comfort On-Off -Power button
8 — Domestic Hot Water symbol
9 — Domestic Hot Water mode operation
10 — Multi-function indication (Flashing during heat
exchanger protection)
11 — Economy symbol
12 — Central Heating mode operation
13 — Central Heating symbol
14 — Burner on and actual load indication
(Flashing during flame current supervision)
15 Service tool connection
16 Temperature-Pressure gauge
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