Fondital TAHITI CONDENSING IST 03 C 298 - 02, Инструкция по эксплуатации

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11
WARNING
In KC model, a special adjusting device is installed, which limits domestic hot water flow rate to 13 liter per minute (KC 24), 14 liter per
minute (for model KC 28) and 16 liter per minute (KC 32).
Domestic hot water temperature supplied depends on no. 3 adjusting device, on the quantity requested by the user and on water
mains supply temperature,
according to the following formula:
K
l = DHW liter per min. = --------
ΔT
K represents:
- 401 in KC 24 model
- 444 in KC 28 model
- 507 in KC 32 model
Δt = DHW temperature – water mains supply temperature
For instance, with model KC 24, if the water supplied is 8°C and you want shower water at 38°C, the value of ΔT is:
ΔT = 38°C – 8°C = 30°C
and the number of DHW litres per minute available at 38°C is:
I = 401 / 30 = 13.4 [litres per minute - mixed water to the tap]
In models KR and KRB with optional external heater, the quantity of DHW available depends on the heater.
In models KR and KRB with optional external heater, the anti-legionellose function is activated, which consists of heating the water inside the
heater to a temperature of 65 °C for 30 minutes, without taking into account any of the other settings.
1.4.4. ANTI-FREEZE function
This boiler is fitted with an anti-freeze protection system, which works when the following functions are activated: SUMMER, WINTER and ANTI-
FREEZE.
The anti-freeze function only protects the boiler, not the whole heating system.
The heating system must be protected using a room thermostat, although this is disabled when the selector is set
to the ANTI-FREEZE or OFF mode.
Therefore, if you want to protect both the boiler and the system, turn to WINTER mode on selector 2.
When the heating water temperature sensor detects a water temperature of 5°C, the boiler switches on and stays on at its minimum thermal power
until the temperature reaches 30°C or 15 minutes have elapsed. The pump continues to operate even if the boiler shuts down.
In models KC, anti-freeze function also protects the DHW circuit.
When the DHW temperature sensor detects a temperature of 5°C, the boiler switches on and stays on at its minimum thermal power until the
temperature reaches 10°C or 15 minutes have elapsed (the deviating valve is in the DHW position). The pump continues to operate even if the
boiler shuts down.
In models KR and KRB with optional external heater for DHW production fitted with a NTC temperature sensor (10 kΩ @ ß=3435; please refer to the
heater technical characteristics), the anti-freeze function also protects the heater.
When the heater temperature sensor detects a temperature of 5°C, the boiler switches on and stays on at its minimum thermal power until the
temperature reaches 10°C or 15 minutes have elapsed (the deviating valve is in the DHW position). The pump continues to operate even if the
boiler shuts down.
In models KR and KRB with optional external heater for DHW production fitted with a thermostat-type temperature sensor, the anti-freeze function
DOES NOT protect the water heater.
Water heater protection can be ensured by setting the boiler to SUMMER or WINTER
(via no.
2
knob), activating the heater (via no.
3
knob),
as described above, and setting a heater thermostat temperature higher than 0 °C.
The CH system can be protected effectively against freezing by means of specific anti-freeze additives suitable for use in multi-metal systems.
Do not use car engine anti-freeze products, and periodically check the effectiveness of the anti-freeze product.