Beeston ACER wall-hung condensing boiler 60-180kW
DESIGN MANUAL
Page 14
7.3 Terminal block connections
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Outside
Sensor
Flow
sensor
high
temp
circuit
Flow
sensor
low temp
heating
circuit
DHW
Sensor
Room
thermos. Low
temp heating
circuit
+
–
0-10 V
DC
Room
Thermos
high temp
heating
circuit.
Cascade
Connection
link
18 19
20
21 22
23
24
25
26 27 28
29
30 31
32
33
34
35
36
C ON LO
Remote
signals
L1 N L2
Calorifier
pump or valve
--------------------
Or low temp
htg. Cct pump.
L1 N L2
3 way mixing
valve low temp
heating cct.
L1 N L2
Heating
system pump
27 & 28
--------------------
or Calorifier
pump 28 & 29
L N E
Main 230V
50 Hz 6A
The ACER control panel terminal block showing the inputs and outputs connections
7.4 Inputs and outputs connections
•
Remote
signals are available, lockout
terminal-20 and boiler on terminal-19. Volt
free.
•
Terminals 21, 22, and 23 for a calorifier 3-
way valve or a calorifier primary pump if low
temperature heating circuit pump is not
used.
•
Terminals 24, 25 and 26 for 3-way mixing
valve heating circuit.
•
Terminals 27, 28 and 29 Heating system
pump. If it is not used for heating circuit then
a calorifier pump.
•
Terminals 34, 35 and 36, 230 volts 50 Hz
external supply via on/off (spur) Isolator
fused at 6 Amps.
•
Terminals 15 and 16, these are the cascade
link control, between two boilers or more
(up
to 8 boilers maximum).
•
Terminals 13 and 14 room stat connection
for high temperature heating circuit.
•
Terminals 11 and 12, the boiler can be
controlled by an external controller trough a
0 to 10 Volts dc signal
.
•
Terminals 10 and 9 Room thermostat with or
without timer, for low temperature heating
circuit.
•
Terminals 8 and 7 Domestic hot water
sensor or thermostat.
•
Terminals 6 and 5 flow sensor for low
temperature heating circuit.
•
Terminals 4 and 3 flow sensor for high
temperature heating circuit.
•
Terminals 1 and 2 external temperature
sensor.
7.5 Electrical
load
7.5.1 Acer 60, Acer 80, Acer 100 and Acer 120 total
outputs electrical power 345 Watts maximum,
load current 1.45 Amp maximum available,
Valves and Pumps connected to the boiler
terminal block and exceed this load
they
must be wired via relays.
7.5.2 Acer 150 and Acer 180, total outputs electrical
power 255 Watts maximum, total load current
1.1 Amp available, Valves and Pumps
connected to the boiler terminal block and
exceed this load
they
must be wired via
relays.
7.6 Cascade
control
7.6.1 The Acer boiler has a cascade function built in
the boiler control. A total of 8 boilers can be
linked by a bus–system, so that all burner
controls will act as one boiler, one boiler will
be designated as a master and the other
boilers as slaves see fig sections 7.6.2, 7.6.3
and 7.6.4, all the required Parameters and
settings are entered into the boilers control at
commissioning.