Weishaupt WTC 60-A Operations Instructions download pdf (Page 8)

3Technical description

3.1 Permissible application

The Weishaupt Thermo Condens WTC 45-A/60-A is a

condensing wall mounted heating appliance for sliding

setback operation without lower temperature limit with a

a minimum flow of 400l/h through the heat exchanger.

•For wall mounting in enclosed rooms

(installation outdoors is not permitted)

•For heating DHW heating circuits in sealed systems

to DIN EN 12828.

•For flue gas ducting in chimneys / flue gas ducts or

directly via wall and roof flue gas systems

•For combustion air supply from the room air or with

room air independent systems.

•For gas families Natural gas E/LL and Liquid

Petroleum Gas B/P.

3.2 Function

3.2.1 General notes

Condensate drain

The condensate created by the condensing boiler

technology is fed into the waste water system via a

siphon built into the unit. The ATV data sheet A251

should be observed.

Combustion air

Depending on the type of operation, the combustion air

is supplied either from the room where the unit is

installed (room air dependent operation) or via a

concentric pipe system (room air independent operation).

Flue gas system

Once the cooled flue gas exits the heat exchanger it

flows through a flue gas duct made from Polypropylene

(PP) to the unit exit, from where a number of different

ducting systems from the Weishaupt flue gas / air system

WAL-PP are available.

☞

Observe installation and operating instructions

WAL-PP!

Safety equipment

An internal flue gas temperature limiter (max. 120 °C)

and a safety temperature limiter switch off the unit at

excess temperature.

3.2.2 Important components

Heat exchanger

The heat exchanger is made from corrosion proof

aluminium alloy.

The flow through the WTC is from bottom to top through

three parallel segments 1 – 3 . The water flow is

distributed between the three segments by the return

distributor and is combined again by the supply

distributor once it has circulated the heat exchanger. An

automatic de-aerator is fitted in the supply collector.

The heat exchanger is designed in such a way that the

flue gas is cooled to below the flue gas dewpoint if the

system temperature is adequately low.

It is surrounded by water and has no additional insulation.

Due to the utilisation of the latent flue gas heat the unit

operates with very high efficiency.

Heat exchanger operating mode

Premix burner

The overheat proof radiant burner is made from a highly

stressable metal mesh (FeCr Alloy). Flame monitoring

and the regulation of the gas quantity are carried out by a

SCOT

monitoring electrode in conjunction with the fully

electronic compound regulation and the Weishaupt

Condens Manager (WCM).

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Weishaupt WTC 60-A Operations Instructions Page 8

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