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Beeston Heating ACER 60 Design Manual page 14

Wall-hung condensing premix gas fired boiler 60-180 kw
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Bees ton ACER wall-hung c ondens ing boiler 60-180kW
D ESIGN MANUAL
7.3
Terminal block connections
1
2
3
4
5
Outside
Flow
Flow
Sensor
sensor
sensor
high
low temp
temp
heating
circuit
circuit
18
19
20
21 22
C
ON
LO
Remote
signals
The ACER control panel terminal block showing the inputs and outputs connections
7.4 Inputs and outputs connections
Remote
signals
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.
6
7
8
9
DHW
Room
Sensor
thermos. Low
temp heating
circuit
23
24
L1 N
L2
L1
N
Calorifier
3 way mixing
pump or valve
valve low temp
--------------------
heating cct.
Or low temp
htg. Cct pump.
are
available,
lockout
10
11
12
+
0-10 V
DC
25
26 27 28
29
L2
L1
N
L2
Heating
system pump
27 & 28
--------------------
or Calorifier
pump 28 & 29
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
settings are entered into the boilers control at
commissioning.
P a g e 1 4
13
14
15
16
Room
Cascade
Thermos
Connection
high temp
link
heating
circuit.
30 31
32
33
Terminals 4 and 3 flow sensor for high
temperature heating circuit.
Terminals 1 and 2 external temperature
sensor.
34
35
36
L
N
E
Main 230V
50 Hz 6A
Parameters and

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