Hamworthy F40V Installation, Commissioning And Operating Instructions page 51

Figure B1.2 - External Control Wiring for Multiple Module Installation
Option 1 Remote Control
External
Control
Control
Signal
0~10V
or
Enable
Note:- each module requires independent isolation of electrical supply and control signals.
Signal cables must not be run in the same conduit as mains voltage cables
Option 1 - reference should be made to Building Regulations and CIBSE Guide 'Energy Eff iciency in Buildings' for controls requirements.
All modules must be sequenced.
Enable - will give On/Off control of the modules
0~10V - will give modulation control of each module
Option 2 provides modulation control of up to 16 modules.
BMS Connections
For 0 - 10v connection, the input signal must be connected to terminals 15 & 16 - see figure 4.6
Note: any safety interlocks MUST be wired across the 0– 10v circuit using suitable low voltage contact ratings.
For connection of an external alarm device, use terminals 8 & 9, which are volt free and rated at 230v - see figure
4.6
For an optional programmable room thermostat, use connector X10-01 on the LMU - see figure B.1.3
HAMWORTHY HEATING LTD
E N L
Local Isolator
2
3
1
2
3
1
2
3
1
FLEET V series
Boiler 1
Terminal Rail
15 16 13 14 21 22
0~10V
Boiler 2
Terminal Rail
15 16 13 14 21 22
0~10V
Boiler 3
Terminal Rail
15 16
13 14 21 22
0~10V
45
Option 2 Merley Cascade Control
Optional
External
Control
Control Signal
0-10V or enable
LPB
Bus
500001213/G