Horstmann HRT4-ZW Guia do Utilizador descarregar pdf (Página 7)

7

Zone/Heating control basic layout

This diagram shows a receiver used in a

conventional fully pumped system using a 2

port spring return zone valve with auxiliary

switch to control the pump and boiler. Please

note: hot water control will need to be

controlled by the use of a programmer or

time switch.

Mains supplies to both

the receiver and the

boiler are omitted for

clarity. Please consult

the boiler manufacturers

installation handbook

before commencing any

installation work.

N L 1 2 3

230V

230V

50V

50V

OFF

N = Neutral

L = Live

S = Boiler switch output

R = Boiler switch return

Boiler external control

connections shown

ONCOMM

N L S R

4

Internal

Electronics

N L 1 2 3

230V

230V

50V

50V

OFF ONCOMM

4

Switch live from

programmer or mains

feed from wiring

centre (fused 3 Amp)

2 Port spring return

motorised valve with

auxiliary end switch

To Pump

and Boiler

N

L

Internal

Electronics

Typical combi boiler system

with built in timer

This diagram shows a typical receiver and

combination boiler installation, where

the external boiler control is connected

via switching terminals (a link may have

to be removed on the boiler switching

control terminals). Mains supplies to both

the receiver and the boiler are omitted

for clarity. Please consult the boiler

manufacturers installation handbook

before commencing any installation work.

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