Atag E 22C, Installation And Servicing Instructions

 Installation & Servicing Instructions ATAG E-Series

13

6.5

Hot water supply

Connection of the drinking water installation should be done according to the national
water laws.

The ATAG E combination boilers are fitted with a stainless steel plate heat exchanger
for producing domestic hot water. The boiler does not have a hot water store and in case
of a demand for hot water the boiler will heat the domestic water flowing through the plate
heat exchanger up to 60°C instantaneous.

The water mains installation must comply with the British water regulations.

In regions with a water hardness value higher than 267ppm (2,67 mmol/l),
calcium deposits should be removed from the plate heat exchanger on a
regular basis. If problems occur when using sanitary water with a chlorine
content higher than 150 mg/l, no recourse can be made to the terms of the
warranty.

The hardness of the water is variable in Great Brittain and Ireland. The water company
can provide exact information about this.

The domestic water pipes can be connected to the installation by means of compression
fittings  / adapter fittings.  The cold water inlet on the Combi boilers must be provided with
the following (counted in the water flow direction):
-

Dosing valve (supplied),

-

Safety group,

-

Expansion vessel 6bar (potable water, blue).

A dosing valve must be fitted in the cold water pipe. The dosing valve ensures that a
quantity of water is supplied which has a guaranteed outlet temperature of 60°C
(assuming a cold water temperature of 10°C). The quantity of water is virtually unaffected
by the water pressure.

With a water pressure lower than 1.5 bar it is advisable to remove the inside mechanism
of the dosing valve.

6.6

Condensation drain pipe

ATAG boilers produce condensate. This condensate must be drained otherwise the
boiler will not function.

The common condensation drain pipe should be connected to the drain by means of an
tundish break connection. By this means the possibility of drain gases ending up in the
boiler is prevented. The drain connection should have a minimum diameter of 32mm.

Connect the condensation drain pipe according to the actual regulations.

The following components are connected to the collective condensation drain pipe:

-

Condensation discharge;

-

Safety valve;

Draining of the condensation water to the external rain guttering is not
permitted in view of the danger of freezing.

Before putting the boiler into operation fill the siphon with 300 ml of water.

The condensate pipe must be run using suitable corrosion resistant materials (eg.
plastic).