10
26. 01. 22. Document Number 671829
Nuaire | Western Industrial Estate | Caerphilly | CF83 1NA | nuaire.co.uk
BPS H-AT
Installation Manual
7.0 ELECTRICAL INSTALLATION
The electrical wiring must be carried out by competent persons, in
accordance with good industry practice and should conform to all
governing and statutory bodies i.e. IEE, CIBSE etc.
7.1 Main Unit Power Supply
The control is powered by a 400Vac 50Hz 3 phase & Neutral supply.
This must be isolated local to the unit and fitted with appropriate over-
current and fault protection.
7.2 Electric Heater Power Supply
For models with electric heating, the heating circuit is powered by 1 or
2 separate, higher current, 400Vac 50Hz 3 phase & Neutral supplies.
This must be isolated to the unit and fitted with appropriate over-
current protection. The main supply is still required. Electric heater
elements are protected by a fail-safe over-temperature switch which
will disconnect the heater supply if a temperature of 80°C is reached.
Once the elements cool, the switch will reset but a power cycle is
required to reset the heater supply contactor.
7.3 Unit Power Supply Details - FLC
Unit Size
Unit (FLC)
Unit with Electric Heater
(Electric Heater Models Only)
Unit with Condenser(s)
(Condenser(s) Models only)
Units with both Condenser
and Electric Heater
B*05H/**AT
4.2 A
4.2 A + 18 A †
8.7 A
8.7 A + 18 A †
B*10H/**AT
13 A
13 A + 27 A †
17.5 A
17.5 A + 27 A †
B*15H/**AT
6.8 A
6.8 A + 35 A †
13.9 A
13.9 A + 35 A †
B*20H/**AT
12.8 A
12.8 A + 53 A †
17.3 A
17.3 A + 53 A †
B820H/**AT
9.6 A
9.6 A + 53 A †
14.1 A
14.5 A + 53 A †
* Denotes any Character.
† These heater models require a separate power supply for the electric heater section, with an appropriate over-current protection device.
7.4 Condenser Power Supply Details - FLC
Unit Size
Condenser Units
Required
Maximum Current
Power Supply
Mitsubishi Part Number
05
BPS-CU-MIT-14 x1
13A
3phase, 50Hz, 400V
PUHZ-P140YHAR2
10
BPS-CU-MIT-14 x1
13A
3phase, 50Hz, 400V
PUHZ-P140YHAR2
15
BPS-CU-MIT-20 x1
19A
3phase, 50Hz, 400V
PUHZ-P200YKAR1
20
BPS-CU-MIT-25 x1
21A
3phase, 50Hz, 400V
PUHZ-P250YKAR1
See condenser manual for more information.
7.5 Wiring
All inter-connections between circuit boards, blowers and sensors are
made at the factory. This diagram only shows the essential field wiring
points for clarity.
Remove link wire if switched live signal, an enabler or BMS signal is
connected.
If inlet and outlet dampers are fitted, remove the damper link
wires. This will allow a 1 minute delay before starting the fans.
7.6 Emergency Shut Down Circuit
Emergency Shutdown Circuit. Break to Remove power. Remove Jumper
bar between T6 & T7 to use.
7.6.1 Switch Live
Switch Live (SL) terminal - A signal of 100-230V a.c. will activate the
switch live signal.
Switch Live 2 (SL2) terminal - A signal of 100-230V a.c. will activate the
switch live 2 (Fan Boost) signal.
A signal from an isolating transformer will produce an
unpredictable result and is not recommended.
Extra low voltage versions of the switched live signals are also available.
Link two contacts to activate the signal.
