![Weishaupt WTC-GB 90-A Скачать руководство пользователя страница 23](http://html.mh-extra.com/html/weishaupt/wtc-gb-90-a/wtc-gb-90-a_installation-and-operating-instruction_953339023.webp)
5.1.2 Fill water quantity
If information about the fill water quantity is not available, the following table can be
used to estimate the quantity. On calorifier systems the calorifier content must be
taken into consideration.
Heating system
Estimated fill water quantity
(1
55/45 °C
70/55 °C
Pipe and steel radiators
37 l/kW
23 l/kW
Cast iron radiators
28 l/kW
18 l/kW
Panel radiators
15 l/kW
10 l/kW
Air conditioning
12 l/kW
8 l/kW
Convectors
10 l/kW
6 l/kW
Underfloor heating
25 l/kW
25 l/kW
(1
based on the heating requirements of the building
5.1.3 Treatment of fill and top-up water
De-ionisation (recommended by Weishaupt)
▶
De-ionise the fill and top-up water completely.
(recommendation: mixed bed procedure)
When the heating water has been entirely de-ionised, additional top-up water up to
10% of the system contents may be untreated. Higher quantities of top-up water must
be de-ionised.
▶
Check the ph value (8.5
∓
0.5) of the de-ionised water:
▪
after the commissioning,
▪
after 4 weeks of operation,
▪
during the annual servicing.
▶
If necessary, adjust the pH value of the heating water by the addition of Trisodium
Phosphate.
Softening (cation exchanger)
CAUTION
Damage to the unit due to raised pH value
Corrosion could damage the unit.
▶
Following the softening of the water by means of cation exchange, the pH value
must be stabilised due to the self alkalisation of the heating water.
▶
Soften the fill and top-up water.
▶
Stabilise the pH value.
▶
Check the pH value (8.5 ± 0.5) during the annual servicing.
Stabilisation of hardness
CAUTION
Damage to the unit due to inappropriate inhibitors
Corrosion and scale could damage the system.
▶
Only use inhibitors when the manufacturer can guarantee the following:
▪
the requirements relating to the heating water are fulfilled,
▪
the heat exchanger will not be attacked by corrosion,
▪
there will be no formation of sludge within the heating system.
▶
Treat the fill and top-up water with inhibitors.
▶
Check the pH value (8.5 ± 0.5) according to the instructions of the inhibitors.
Installation and operating instruction
Gas condensing boiler WTC-GB 90-A
5 Installation
83266502 • 1/2010-08 • La
23-95