gledhill BMA 215 OV-SOL, Design, Installation & Servicing Instructions, Page: 31 / 48

Page 31
INSTALLATION
INST
ALL
A
TION
Zoned Heating Systems
If a zoned heating system (or a separate towel
rail circuit) is required, this can be provided in
the conventional way from the main heating
flow and return.
In many cases this has been achieved by
raising the appliance in the cupboard to create
an accessible space which will allow easy
maintenance of the necessary zone valves etc.
A typical schematic arrangement for a 2 zone
system is shown opposite. Further zones can be
added in the same way if required.
Time and temperature control of each zone
valve can be achieved by fitting a programmable
room thermostat.
A typical wiring arrangement based on the
use of a Danfoss TP5000 programmable room
thermostat is shown below.
However other ways of controlling the
zones using multi channel clocks and room
thermostats can be used if preferred.
When used in this way channel 1 of the digital
clock fitted to the front of the BoilerMate A-Class
OV SOL can be set as normal to control the hot
water but channel 2 must be set to continuous
operation mode.
Manual Isolating
Valves
C
onnec
tion
to B
oilerM
at
e OV SOL
hea
ting r
etur
n pip
e
C
onnec
tion
to B
oilerM
at
e OV SOL
hea
ting flo
w pip
e
C
onnec
tion
to B
oilerM
at
e OV SOL
elec t
er
minals
Zone 1
Programmable
room thermostat
Zone 2
Programmable
room thermostat
Zone 1 Flow
Zone 2 Flow
Zone 1 Return
Zone 2 Return
TYPICAL SCHEMATIC ARRANGEMENT OF MULTIZONE HEATING
MCB 2
MCB 1 MCB 3
16A
6A
16A
N
SL-W SL-B SL-R L1 L2 L3 N N N SL-F N-IH
L-IH L-IH
SL-H E E
PE-IH
4 Core cable
4 Core cable
VAL-N
VL-N/O
VAL-SL
Sc Sc
SC Solar Panel Sensor
VAL-PE
Sz Sz
SZ Solar Zone Sensor
VL-N/C
BOILERMATE MULTI-ZONE
EXTERNAL WIRING DIAGRAM
1
COM
2
OFF
3
ON
E
L E N
AS
TP5000 Programmable room
Thermostat
Zone valve Spring return
with auxiliary switch
Junction Box
3 core 0.75mm²
flex
L2
L N E
AS
E
1 2 3
COM OFF ON
L1 SL E N L
5 Core flex from
zone valve
1
COM
2
OFF
3
ON
E
L E N
AS
TP5000 Programmable room
Thermostat
Zone valve Spring return
with auxiliary switch
Junction Box
3 core 0.75mm²
flex
L2
L N E
AS
E
1 2 3
COM OFF ON
L1 SL E N L
5 Core flex from
zone valve
Zone 1
Zone 2