User Manual
Mounting Location
To ensure convenience of use, the RWB2 should be fitted in a position
which allows easy access. It is recommended that the unit is placed at
a height of 1.4 metres from the floor.
NB The RWB2 should not be installed in locations that are directly
exposed to water splashes or steam from cooking utensils and
kettles etc.
Backplate
The RWB2 is supplied with the industry standard backplate to which
the system must be wired. The backplate can be fitted directly to the
wall or on to a conduit box. If a conduit box is fitted all wiring to
the backplate should pass through the base. Only conduit boxes
which comply with BS1363 or BS4662 (single gang should be used).
The backplate is the same as that used with: RWB2, RWB20, RWB40,
RWB200 series and RWBXP Programmers plus Potterton MINIMINDER
and Glow-worm MASTERMIND.
When the RWB2 is used as a direct replacement no re-wiring is
necessary, (except in the case of the RWB20 when a neutral will be
required, if one is not present).
PrPr
PrPr
Pr
ogrammer Wiring Diagramsogrammer Wiring Diagrams
ogrammer Wiring Diagramsogrammer Wiring Diagrams
ogrammer Wiring Diagrams
Fig 2
Pumped Central Heating with Gravity Hot Water
RWB2 Programmer Installation Instructions
RWB2
IMPORTANT!
Please read this before installing your unit.
1. Select 10 or 16 way programme before clipping unit on to
backplate. (See Fig. 6).
2. Complete wiring to backplate, clip programmer on to
backplate,
powerpower
powerpower
power
up up
up up
up and rotate dial through a full
24 hour rotation.
s
Fig 5
It is a good wiring practice that the supply to the unit should be via a two
pole disconnection providing at least 3mm air gap.
Line voltage applied to terminals 3 and 4 when the programmer is in
the ON position for HW and CH and to terminasl 1 and 2 when it is in
the OFF position. Terminals N, L, 1, 2, 3 and 4 connect the controls for
domestic hot water and central heating applications.
(See Figs. 3, 4 and 5).
The programmers are factory set to give 10 combinations of HW and
CH, the 10 programme position is normally used when the hot water is
on a gravity system. In this case it is not possible to have CH without
HW. (See Fig. 3 for wiring diagram). If 16 programmes are required
then refer to programme selection. (Fig 6).
The 16 programme position is normally used on a fully pumped system
using 2 or 3 port valves, thus allowing independent control of HW and
CH. (See Figs, 4 and 5 for wiring diagrams).
Note: All external wiring must comply with current IEE regulations.
Wiring of this unit should be carried out by a qualified electrician.
Whilst every effort is made to ensure the accuracy of the instructions
given, you will appreciate that the discrepancies may occur due to a
variety of reasons outside our control. If after wiring your system you
find that it does not work properly you should:
Check that you have used the correct system and wired it correctly.
Ensure that no wiring unit links have been missed and all screws are
tight.
Check with the Technical Help line, there may be a simple explanation.
(Technical Help Line: 01952 602048 Mon - Fri 9am - 5pm).
N.B. These units are not suitable for control of immersion
heaters.
Mid-position System
Fig 4
Zone VZone V
Zone VZone V
Zone V
alve Systemalve System
alve Systemalve System
alve System
RWB2 BACKPLATE
RWB2 BACKPLATE
Fig 3
RWB2 BACKPLATE
Landis & Staefa Division