Mains Supply Connection - Three-Phase Supply; 3-Phase Electrical Supply Connection; Mains Supply Connection - Single Phase Supply; Single Phase Electrical Supply Connection - Lochinvar TTW Series Installation, Commissioning And Maintenance Instructions

15.4 MAINS SUPPLY CONNECTION – THREE-PHASE SUPPLY.
15.4.1

3-PHASE ELECTRICAL SUPPLY CONNECTION

When using a 3-Phase circulating pump, a 400 VAC/50 Hz/3 Ph/N/GND power supply should be connected to the rail-mounted terminal blocks
located to the rear of the wiring connection panel via a suitable isolator. The 230 VAC power supplies to the control panel are already connected
and should not be altered.
The 400 VAC/50 Hz/3 Ph pump should be connected to the relay adjacent to the terminal blocks. An overload protection device should be
installed in accordance with BS7671.
15.5 MAINS SUPPLY CONNECTION – SINGLE PHASE SUPPLY
15.5.1

SINGLE PHASE ELECTRICAL SUPPLY CONNECTION

When using a 1-Phase circulating pump, a 230 VAC/50 Hz/1 Ph/N/GND power supply should be connected to the rail-mounted terminal blocks
located to the rear of the wiring connection panel via a suitable isolator. The 230 VAC power supplies to the control panel are already connected
and should not be altered.
The 230 VAC/50 Hz/1 Ph pump should be connected to the relay adjacent to the terminal blocks. An overload protection device should be
installed in accordance with BS7671.
15.6

FUSES

On each PCB are 2 fuses, four fuses in total
FUSE NO.
F1
F2
15.6.1 FUSES
APPLICATION
Pump1
Pump2 / TWV
Switch mode supply,Gas valve
Pump3,External Ignition
FUSED VALUE
250VAC5ATH
250VAC5ATH
FUSE TYPE
5 AT ceramic filled fuse
5 AT ceramic filled fuse
45