section 6: Electrical
Page 27
figure 6-9:
S-plan (HW priority) system connection diagram
L N E
240V
50HZ
5A
1
2
3
4
5
6
7
8
9
10
Frost
Stat
Pipe Stat
(If fitted)
Wiring Centre
2 1 3
Room
Stat
Brown
Blue
Green/Yellow
2-Port Zone Valve
2-Port Zone Valve
Motor HW
HTG
Blue
Green/Yellow
Motor
Blue
Green/Yellow
Orange
Orange
Brown
Brown
11 12
Grey
Grey
Dual Limit &
Cylinder Stat
2
C
1
HW ON
N L
1 2 3 4
Horstmann H21 Series 21
E
COMMON
HW OFF
CH ON
COMMON
CH OFF
LINK
LINK
17
18
19
20
21
22
23
24
25
1
2
3
4
5
6
7
8
Link
ASHP Terminals
4 Core ( 3 + E )
Volt free connections from
Heating and Hot Water zone
valves to terminals 18 - 20 on
ASHP terminal PCB via relays
on Grant EP002
Grant EP002 Heat Pump Interface
3
2
1
1
2
3
4
RL1
RL2
RL3
Hot Water (Yellow)
Common (Red)
Heating (Blue)
CH
DHW
N
P
NOTES:
CLIENT:
Grant UK
PROJECT:
Aerona³ s-plan (HW priority)
GRANT
ENGINEERING UK LTD
Hopton House
Hopton Industrial Estate
Devizes
WILTSHIRE
SN10 2EU
DATE: 19-09-2018
SCALE: NTS
DRAWN BY: S. Veitch
CHECKED BY: P. Stanley
□
C:\Users\Terry\Documents\Self employment folder\May 2013\Grant logo.bmp
the control system shown in this diagram ensures that there can be no demand for space heating and hot water at the same
time.
In order to achieve this type of operation, the programmer mUst not have a built-in connection between the live connection
(driving the timer) and the two programmer switches.
the programmer shown in this diagram is an example of one that meets this requirement, as the installer is required to fit links
between the mains live and the programmer swithces for mains voltage systems.
this volt free remote contact is provided by the Grant EP002
Interface relay box. refer to sections 6.8 and 6.10.
! nOtE !
terminals
19
Hot water
20
Heating
18 and 21
Common
Summary of Contents for Aerona3 HPID12R32
Page 71: ...NOTES Notes Page 71...
