Figure 8.3.1 Jumper J14 Connection On Pcb; Figure 8.3.2 Jumper J17 Connection On Pcb; Figure 8.3.3 Pcb Set-Up For Multiple Boiler Installations - Hamworthy MILBORNE381 Series Design Installation, Commissioning And Operating Instructions

8.2.7. Connection to temperature control devices
Milborne boilers are fitted with a versatile control and
management system, which can manage up to three
independent circuits
temperatures.
Figure 4.6 shows the main devices (temperature
sensors, circulators, valves, etc.) which form the
three circuits which can be, directly controlled by the
boiler controls.
Note: Temperature sensors for the secondary circuits
are optional extras and must therefore be specified
when requesting quotations and placing orders.
Programmable room thermostats for low and high
temperature heating
programmable.
8.2.8 Outside Air Sensor Connection
If outside temperature compensation is to be used,
the outside air sensor needs to be connected to
terminals no. 7 and 8 (figure 4.6).
The outside air sensor shall be installed on an
outside wall, North or North/East aspect, at a
minimum height of 2.5 metres, away from windows,
door, and ventilation grilles and flue discharges.
Never install the probe in a position exposed to the
sun or other forms of radiated heat.
Note: the outside sensor is also required to facilitate 2
stage frost protection and Summer Shutdown control.
8.3 Emergency Mode
The Milborne boilers incorporate a function which
can be activated in the case of a mal-function of the
Master control - Emergency Mode.
Once enabled, this ensures that the system will
operate at a default delivery temperature set by the
Manufacturer.
8.3.1 Disconnect the 4 pole connector J14 from the
Master pcb - see figure 8.3.1
8.3.2. Set all four J17 switches located on each Slave
to the OFF position - see figure 8.3.2
8.3.3. Supply all system pumps with mains via the
appropriate contactor hand auto switch
8.3.4. Terminal X1 or Terminal X2 which are part of
the cabling of the J14 connector ) must be connected
to a 24V DC power supply (see figure 8.3.3)
WARNING! If several Milborne boilers are
installed in series, one or both of the
terminals (X1 or X2) may be connected to the
adjacent boilers. If this is the case, supply
the free terminal with 24V, for example
terminal Xn - see figure 8.3.3.
HAMWORTHY HEATING LTD
operating at different
circuits are 24hr
J10 J10 J8 J8
6 5 4 3 2 1 6 5 4 3 2 1 5 4 3 2 1 5 4 3 2 1
R6 R6 R5 R5 R4 R4
F1 FUSE 3.15A F1 FUSE 3.15A
1 1
2 2
J3 J3
3 3
J7 J7
J6 J6
J5 J5
J4 J4
Figure 8.3.1
day
Slave
J10 J8
6 5 4 3 2 1 5 4 3 2 1
R6 R5 R4
F1 FUSE 3.15A
1
2
J3
3
J7
J6
J5
J4
Figure 8.3.3
24Vcc X 1
29
MILBORNE
3 3 1 1
J12 J12
4 4 2 2
T1 T1
R3 R3 R2 R2 R1 R1
J2 J2
MASTER MASTER
BUS J14 BUS J14
1 1 2 2 3 3 4 4
MC MC
3 1 1
J12
J11
4 2 8
Cod. SCHEDA39
T1
R3 R2 R1
J2
MASTER
BUS J14
MC 1 2 3 4
Plug J14 disconnected
1 2 3 4
1 1 2 2 3 3 4 4 5 5 6 6 7 7
J11 J11
8 8 9 10 11 12 13 9 10 11 12 13 14 14
Cod. SCHEDA39 Cod. SCHEDA39
J1 J1
PC PC
Plug J14 Plug J14
Figure 8.3.2
2 3 4 5 6 7
9 10 11 12 13 14
J1
PC
X 2
500001130/J