2
The ServicePlus S21R Programmer
The simple instructions contained in this user guide are designed to help with the
programming and operation of the unit.
1
SET indicator - RUN is the normal position
2
Time of day
3
Switch period symbol
4
SET button
5
Hot Water BOOST or adjust (-) button
6
Central Heating ADVANCE or adjust (+) button
7
Hot Water (HW) programme select button or ENTER button
8
Central Heating (CH) programme select button
9
Hot Water ON indicator
10
Central Heating ON indicator
11
SET positions
12
PROGRAMME positions
13
BOOST symbol
14
ADVANCE symbol
15
AM/PM symbol
16
PROGRAMME indicators
1 15
11
3
9
12
4
5
6
7
8
2
16
13
14
10
