Wiring And Power Supply Information - Samsung RC090-120-140 Installation And Maintenance Manual

Wiring and Power Supply Information:

Power
The EHS system needs 2 power supplies:
One connects into the outdoor unit, 20 Amp for the 9kW and 32
Amp for the size 16
The one for the control box is 16 Amp and wires into the top of
the breaker (mcb) in the box
Immersion Heater
The immersion heater is connected into the control box terminals
A3 Neutral and A4 Live, The control box controls the operation of
the immersion heater. If a fused spur is used it must be labelled
as switching it off will cause an error.
Communication cable
must be run from the outdoor unit to the control box. Use 2 core flex 0.5-1mm (its 16V ac)
Sensors
The blue cylinder sensor plugs into a socket T4 on the
controller PCB and into the control sensor pocket in the cylinder
in the top ½ of the cylinder. Must be above immersion.
cylinder sensor needs to go 115mm into the cylinder; it must be
clipped so it can't pull out.
The red safety sensor is to avoid over temperature, If no backup boiler is used the sensor is
not needed. It plugs into a red socket T3 on the controller PCB and must be fixed to the flow
pipe of the heat pump.
Using two port valves
2 port valve for Hot water, wire brown wire to B9 and Blue to B7, the rest are not used.
2 port valve for heating zone 1 wire B14 live and B11 Neutral
Thermostats/ timers and under floor heating manifolds
We recommend in all cases the heating should be controlled by an external field supplied
room stat / setback stat, time clock or a run signal from a boiler enable signal from under floor
manifolds.
The heat pump needs a run signal by making a connection from B20 – B22, B20 is
permanently live 240V ac.
When the stat is made the unit will run, when the stat opens the unit will stop.
pump will run on for 6 minutes after the unit is told to stop.
affected and will always take priority.
Pump
The circulation pump must be wired Live to B6 and neutral to B5, MAX pump power is 500
Watts. If two pumps are used wire them both to these terminals
www.samsungehs.co.uk
The
NOTE the
Hot water production is not
©G Hendra April 2015 9