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- Open the gas stop cock;
- turn the master switch installed ahead of the boiler ON. The display turns on and indicates the function currently active (see tables 3 and 4);
- select boiler operation mode by pressing the “operating status selection” button on the touch-screen (
E
, fig. 1): OFF, SUMMER, WINTER, CH ONLY
(par. 1.2).
- set desired CH temperature (see par. 1.8.2.);
- set desired DHW temperature (see par. 1.8.3.);
- set desired temperature on the (optional) ambient thermostat in the building.
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Set desired CH water temperature via h/- buttons (
B
, fig. 1).
CH temperature may be set within a range from 35°C to 78°C.
The waiting time between one boiler ignition and the following one, used to prevent boiler frequent turning on and off, ranges between 0 and 10
minutes (default value: 4 minutes), and can be edited with the
P11
parameter.
During temperature setting, the CH symbol (
8
, fig. 1) on the screen flashes and the CH current setting is displayed.
When the central heating system requests heat from the boiler, the LCD displays the CH symbol (steady on) (
8
, fig. 1) and the current heating flow
water temperature. The burner on symbol (
14,
fig. 1) only shows while the burner is operating.
Should water temperature in the system fall below set minimum value, between 35°C and 78°C (default value 40°C) to be edited with the
P27
parameter, the waiting time is reset and the boiler re-ignites.
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Set desired DHW water temperature via “DHW +/-” buttons (
A
, fig. 1).
The DHW production function is enabled on CTFS / CTN models and on RTFS / RTN models with external water cylinder (optional).
Such function has always priority over CH water supply.
For CTFS / CTN models, DHW temperature may be set within a range from 35 °C to 57 °C.
During temperature setting, the DHW symbol (
7
, fig. 1) on the display flashes and the DHW setting is displayed.
In RTN / RTFS models with external water cylinder (optional), water cylinder production of DHW can be enabled or disabled by pressing button
“Operating mode selection” on the touch-screen (
E
, fig. 1).
Water cylinder is enabled when boiler is in one of the following operating modes: SUMMER, WINTER.
For RTN / RTFS models with external water cylinder (optional) with NTC probe (10 kQ @ ß=3435; refer to water cylinder technical specifications),
temperature range is between 35 °C and 65 °C. When setting temperature, the DHW symbol (
7
, fig. 1) will flash on the display and the DHW value
being set will be shown.
In RTN / RTFS models featuring an external water cylinder (optional) it is not possible to use a thermostat. A probe must be inserted in the boiler
instead. This decision was made in order to reduce gas consumption.
In RTN / RTFS models featuring an external water cylinder (optional) fitted with a water cylinder probe (optional), once every 15 days the anti-
legionnaires disease function is activated: this consists in heating the water of the external cylinder up to 65 °C for 30 minutes, regardless of all the
other settings.
The burner on symbol (
14
, fig. 1) only shows while the burner is operating.
Summary of Contents for FORMENTERA CTFS 32
Page 60: ...60 C D E fig 40 ...
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