Thermostatic Radiator Valves; Frost Protection; Circulating Pump; Anti-Cycling 'Economiser' Control - Vaillant 824/2 E Instructions For Installation Manual

5 Boiler Installation Sequence
Connection details for control systems utilising 2 x 2 port motorised valves
via external wiring centre/junction box
Diagram only applies to the specific controls mentioned
3 amp fused THERMOcompact
main supply terminal strip
L N E L N 3
L N L N 3
External wiring centre/junction box*
N L
3 4
N L
*Do not use pre-wired printed circuit board type
10 7 E
Cylinder thermostat
ACL Drayton HTS3 2 1 C
Danfoss Randall ATC
3 2 1 E
Tower CS1 YL BK RED
Honeywell L641
2 1 C
Horstmann HTC1
3 2 1
Siemens-Landis & Staefa RAM 1
3 2 1 E
Sunvic SA 2452
2 1 3
E 5 10 3 4
EARTH BLUE BROWN GREY ORANGE
Hot water 2 port motorised valve
Fig. 5.19
Key:
X Central heating on
Y Hot water on
Z Hot water off
Lifestyle LP241, LP 522, LP 722
Tempus 6, Tempus 7
Danfoss Randall CP 715, FP715
Note: *Earth not required
Danfoss Randall Set 2E, Set 3E
Note: *Earth not required,
Link L - 2 - 5
Grässlin Towerchron QE2
Honeywell ST699B, ST799A
Note: Link L - 5 - 8
Honeywell ST6200, ST6300, ST6400
Horstmann Channel Plus H21, H27
Note: *Earth not required,
Link L - 2 - 5
Siemens-Landis & Staefa RWB2, RWB9
Potterton Myson EP 2002, EP 3002, EP 6002
Note: Link L - 5
Sunvic Select 207
Fig. 5.20
24
Supplied By www.heating spares.co Tel. 0161 620 6677
Programmer
for programmer connections see fig. 16.d
4 5 N L X** Y** Z**
4 5 5 3 6 7 8
** see key below
5 6 7 8 9 10
not used
5 9 6 L N
Room thermostat
Vaillant VRT 9090 E C A
ACL Drayton Digistat 2, 3, 4
3 1
ACL Drayton RTS 1, 2 N 3 L
Danfoss Randall RX-1
3 2 C B
Danfoss Randall RMT 230 4 1
2
Danfoss Randall RET 230 N 3 L
Tower SS
4 2 1
Honeywell T6360 2 3 1
Horstmann HRT 1 4 2 1
Siemens-Landys & Staefa RAD 1 2 1
Sunvic TLX 2000 series 4 1 3
E 5 9 3 4
EARTH BLUE BROWN GREY ORANGE
Central heating 2 port motorised valve
N L 1 2 3 4
not used
5 3 7 6
not used
E N L 1 2 3 4
not used
7 6
5 3
not used
E N L 1 2 3 4
not used
*
5 3 7 6
not used
E N L 1 2 3 4 5 6
* 6
5 3 7
not used not used
N L 1 2 3 4
not used
5 3 7 6
not used
L N 3 4 5 6 7 8
3 5 6 7
not used not used
N L 1 2 3 4
not used
5 3 7 6
not used
E N L 1 2 3 4 5 6
* 5 3 7 6
not used not used
N L 1 2 3 4
not used
5 3 7 6
not used
E N L 1 2 3 4 5
not used
5 3 7 6
not used
N L 1 2 3 4
not used
5 3 7 6
not used

5.19 Thermostatic radiator valves

The boiler has a built in automatic bypass valve making
it ideal for use in systems with thermostatic radiator
valves (no separate system bypass is required).
For optimum fuel economy it is recommended that
where TRV's are used they are used in conjunction with
a programmable room thermostat or separate timer and
room thermostat to ensure complete boiler shut down
when the heating demand is satisfied. (The radiator in
E
the room containing the room thermostat should not be
fitted with a TRV).

5.20 Frost protection

The boiler has an integral frost thermostat which is
E designed for protection of the boiler.To protect remote
or exposed parts of the heating system or property
E
E additional frost protection measures must be taken such
E
as the installation of an external frost thermostat. This
frost thermostat should be connected across the boiler
terminals 3 and 4, in parallel with any external heating
controls. External frost protection cannot be used when
plug in timers have been fitted.

5.21 Circulating pump

The boiler incorporates a built in circulating pump that
is fully prewired (no additional wiring is necessary). The
pump incorporates an automatic overrun period after
the boiler switches off.

5.22 Anti-cycling 'economiser' control

The boiler incorporates a built in anti-cycling control to
ensure that energy wasteful short cycling of the boiler
cannot occur. This control prevents the boiler from re-
igniting for a preset period of 5 minutes after central
heating operation (the hot water operation is unaffected
by this control and hot water can be drawn at any time).
Note!
To temporarily override the anti-cycling control
turn the main boiler on/off switch to the off
position "0" and then back to the on position
"I" after a few seconds.
Automatic pump spin control (APS)
The boiler incorporates a built in control which will spin
the built in circulating pump and operate the diverter
valve (turboMAX only) once in a 24 hour period. This
control helps to prevent seizure when the boiler is not
operated for a period of time. This control is not active
when the power supply to the appliance is turned off.
Instructions for Installation and Servicing turboMAX plus and thermoCOMPACT R1