Viessmann EM-EA1 extension User Manual

10
Connecting the operating mode changeover: DI1 to DI3
jF jF
[{][{][{]
DI1 DI2 DI3
1
2
3
4
1
2
3
4
5
6
Fig. 5
■
External contacts at DI1, DI2 and DI3 must be poten-
tial-free.
■
When making the connection, adhere to the require-
ments of protection class II. That is 5.0 mm air and
creep paths and 2.0 mm insulation thickness against
'live' components.
Weather-compensated operation
As soon as the contact closes, the following demand
becomes active:
■
Demand for all installed heating circuits simultane-
ously, with the respective programmed set room tem-
perature of the individual heating circuit:
DI1 Reduced room temperature
DI2 Standard room temperature
DI3 Comfort temperature
Continuous operation or room temperature-
dependent operation
As soon as the contact closes, the following demands
become active:
■
Set flow temperature demand for the system
■
Demand for all installed heating circuits simultane-
ously, at the respective programmed temperature
level of the individual heating circuit:
DI1 Reduced flow temperature
DI2 Standard flow temperature
DI3 Comfort flow temperature
(Only with continuous operation)
Connecting external demand: fD
? ?
fÖf-]
A
?
1
A B
fD
Fig. 6
A
Signal for external demand or external blocking
B
Junction box
The demand is active if 230 V voltage is present at dig-
ital input 43-1. A demand is issued to the heat genera-
tor.
The set values for the flow temperature and the speed
of the primary pump are specified with parameters
528.0 and 1100.2.
Installation sequence
Connecting external functions (cont.)
6131087
Installation

Viessmann EM-EA1 extension Specifications

General

Brand	Viessmann
Model	EM-EA1 extension
Category	Control Unit
Language	English