Boiler Installation Sequence 5
Instructions for installation and servicing aquaPLUS VUI 362-7
21
5.14 Controls
External electrical controls
The boiler terminals 3, 4 and 5 are for connecting
external 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.
Connection of external controls
Connection details for programmable room
thermostats.
Fig. 5.12 shows the connection details where a
programmable room thermostat (time switch with built
in room thermostat) is used to control the boiler.
Important: The arrowed numbers indicate connection
into the relevant terminal in the boiler terminal strip.
Fig. 5.12 Connection details for programmable thermostats
L
N
2
3
4
L
N
3
4
1
ACL Drayton
Lyfestyle PT271, PT371
ACL Drayton
Digistat 2, 3, 4
ACL Drayton
Digistat RF - SCR Receiver
Danfoss Randall
TP4, TP5, TP5E
Danfoss Randall
TP5E RF with receiver RX1
Danfoss Randall
TP75
Grässlin Towerchron
RTC7
Honeywell
CM61, CM67, CM31, CM37
Horstmann
Centaurstat 1, 7
Landis & Staefa
REV 11, REV 15, REV 22
1
2
3
4
3
Sunvic
TLX 6501
Sunvic
TLX RFP, TLX RFD
Vaillant
VRT 220, 230
N
1
3
N
3
2
L
L
4
3
2
4
3
1
L
N
2
3
4
L
N
3
4
1
B
C
2
3
4
1
A
3
5
6
4
1
2
3
4
3
A
B
3
4
C
1
2
4
3
4
3
L
L1
3
4
Smiths Timeguard
ProgramaSTAT PRT11, PRT17
L
N
4
L
N
3
3
4
1
2
3
4
3
L
N
2
3
4
L
N
3
4
1
3
4
3
4
5
5
Connection details for external time switches and
boiler terminal strip.
Fig. 5.13 shows the connection details where a time
switch is used without a room thermostat to control the
boiler.
Important: The arrowed numbers indicate connection
into the relevant terminal in the boiler terminal strip.
If a room thermostat is to be connected in addition to a
time switch the wire between the time switch "ON"
terminal and boiler terminal 4 should be broken by the
contacts of the room thermostat (see schematic layout,
Fig. 5.14).
Vaillant optional plug in timer accessories
Refer to the instructions supplied with the optional
accessories for connection details.
Fig. 5.13 Connection details for time switch
Upon completion of all electrical connections refit the
terminal box cover by pushing into place. The cover is
secured by two locking clips.
L
N
2
3
4
L
N
3
4
1
ACL Drayton
Tempus 1, Tempus 2
Lyfestyle LP111, LP711
ACL Drayton
Switchmaster
SM300
ACL Drayton
Switchmaster 980
Danfoss Randall
103 Series
Danfoss Randall
Set 1E, TS975
Danfoss Randall
TS715
Grässlin Towerchron
QE1, QM1
Honeywell
ST610A, ST6100C
Horstmann
Channel Plus
H11, H17, 425 Coronet
Horstmann
Centaur Plus
C11, C17
L
N
2
3
4
L
N
4
3
1
Potterton Myson
EP 4002, EP 5002
Smiths Timeguard
SupplyMASTER
FST11, FST17
Sunvic
Select 107
N
1
A
B
C
N
4
2
L
L
3
3
4
1
2
6
5
E
4
L
3
N
3
E
N
E
2
3
4
N
E
1
L
L
3
5
6
4
L
N
2
3
4
L
N
3
4
1
L
N
2
3
4
L
N
3
4
1
L
N
2
3
4
L
N
3
4
1
N
E
2
3
4
N
E
1
L
L
3
5
6
4
N
E
2
3
4
N
E
1
L
L
3
4
L
N
2
3
4
L
N
3
4
1
L
N
2
3
4
L
N
3
4
1
A
B
D
L
N
L
N
C
N
E
3
1
2
4
3
4
5 E
1
2
4
4
3
2/L 1/N
3
6
5
mains supply
L
N
E
E
Landis & Staefa
RWB7, RWB30
834702_33GB_012005.qxd 09.03.2005 16:26 Uhr Seite 21
