Controls; Vaillant Controls And Accessories; External Electrical Controls; Connection Details For External Time Switches And Boiler Terminal Strip - Vaillant ecoTEC plus 612 Instructions For Installation And Servicing

4.15 Controls

4.15.1 Vaillant controls and accessories

Controller
VRC 400 (1-circuit controller, weather-controlled)
VRT 360 (room temperature controller)
Available from 10-01-2006
VRT 360f (room temperature controller)
VRT 230 (room temperature controller)
timeSWITCH 140 (timer)
timeSWITCH 130 (timer)
VRT 30 (room thermostat)
VRT 50 (room thermostat)
Telecommunication
vrnetDIALOG 830 (Int)
vrnetDIALOG 860/2 (Int)
Accessories
VR 65 control centre for UK cylinder installation (eBUS)
vrDIALOG 810/2
Table 4.1 Vaillant controls and accessories

4.15.2 External electrical controls

The boiler terminals 3, 4 and 5 are for connecting exter-
nal electrical controls such as a time switch and/or room
thermostat. Terminals 3 and 4 are linked together when
the boiler is supplied. If external controls are used, this
link must be removed, and the controls connected
across terminals 3 and 4. Terminal 5 is an additional
neutral connection for external neutrals such as from
the anticipator of a room thermostat.
4.15.3 Connection details for external time switches
and boiler terminal strip
20 VDC
7 8 9 L N
N
L
SWITCH
3 A FUSE
CONTACTS
MAINS
SUPPLY
L
230 V
50 Hz
N
Fig. 4.18 Connection details for time switches
Instructions for installation and servicing ecoTEC
Supplied By www.heating spares.co Tel. 0161 620 6677
00 2001 0843
00 2001 0842
00 2001 8258
00 2001 0841
00 2001 8265
00 2000 3988
00 2000 3984
00 2002 3370
(DO NOT USE 7, 8, 9 IN UK!)
5
3 4
ROOM
THERMOSTAT
CLOCK
N
Boiler installation sequence 4
Item no. Connection
Installation in electronics box (plug-and-play)
Wall-mounted, 2-wire bus
Wireless controller, receiver wall-mounted
Wall-mounted, 3-wire connection to terminals 3-4-5
306 760 Installation in electronics box (plug-and-play)
306 759 Installation in electronics box (plug-and-play)
300 637 Wall-mounted, 3-wire connection to terminals 3-4-5
Wall-mounted, 2-wire bus
Item no. Connection
GSM/GPRS, installation in electronics box (plug-and-play)
Wall-mounted, GSM/GPRS, up to 16 appliances
Item no. Connection
307 215 System solution for UK cylinder connection
Diagnostic software
If a room thermostat is to be connected in addition to a
time switch the wire between the time switch "ON" ter-
minal and boiler terminal 4 should be broken by the con-
tacts of the room thermostat (see schematic layout, fig.
4.18).

4.15.4 Vaillant optional plug in timer accessories

Refer to the instructions supplied with the optional
accessories for connection details. Upon completion of
all electrical connections refit the terminal box cover by
pushing into place. The cover is secured by two locking
clips.

4.15.5 Connection details using the VR 65 Control

Center

The Control Center VR 65 is an eBUS system compo-
nent.
In a storage unit installation, it is responsible for the
communication between the storage unit, the ecoTEC
plus system boilers and external 2- or 3-way-valves.
Connect the VR 65 Controll Center as described in the
enclosed manual.

4.16 Thermostatic radiator valves

The boiler has a built in automatic by-pass valve making
it ideal for use in systems with thermostatic radiator
valves (no separate system by-pass is required). For opti-
mum fuel economy where TRV's are used they must be
used in conjunction with a boiler control interlock. A pro-
grammable room thermostat or separate timer and
room thermostat will ensure complete boiler shut down
when the heating demand is satisfied. (The radiator in
29