Installation manual
24
0 EKCBX/H008BAV3
Unit for air to water heat pump system
4PW64602-1A – 09.2010
Precautions on wiring of power supply and inter-unit wiring
■
Use a round crimp-style terminal for connection to the power
supply terminal board. In case it cannot be used due to
unavoidable reasons, be sure to observe the following
instruction.
-
Do not connect wires of different gauge to the same power
supply terminal. (Looseness in the connection may cause
overheating.)
-
When connecting wires of the same gauge, connect them
according to the below figure.
■
Use the correct screwdriver to tighten the terminal screws.
Small screwdrivers can damage the screw head and prevent
appropriate tightening.
■
Over-tightening the terminal screws can damage the screws.
■
See the table below for tightening torques for the terminal
screws.
■
In wiring, make certain that prescribed wires are used, carry out
complete connections, and fix the wires so that outside forces
are not applied to the terminals.
Connection to a benefit kWh rate power supply
Electricity companies throughout the world work hard to provide
reliable electric service at competitive prices and are often authorized
to bill clients at benefit rates. E.g. time-of-use rates, seasonal rates,
Wärmepumpentarif in Germany and Austria, ...
This equipment allows for connection to such benefit rate power
supply delivery systems.
Consult with the electricity company acting as provider at the site
where this equipment is to be installed to know whether it is
appropriate to connect the equipment in one of the benefit kWh rate
power supply delivery systems available, if any.
When the equipment is connected to such benefit kWh rate power
supply, the electricity company is allowed to:
■
interrupt power supply to the equipment for certain periods of
time;
■
demand that the equipment only consumes a limited amount of
electricity during certain periods of time.
The unit is designed to receive an input signal by which the unit
switches into forced off mode. At that moment, the outdoor unit
compressors will not operate.
Tightening torque (N•m)
M5 (X3M)
2.0~3.0
CAUTION
1.
In case the use of stranded conductor wires is
unavoidable for one reason or another, make sure to
install round crimp-style terminals on the tip.
Place the round crimp-style terminal on the wire up to
the covered part and fasten the terminal with the
appropriate tool.
2.
When connecting the connection wires to the terminal
board using a single core wire, be sure to perform
curling.
Not executing the connections properly may cause
heat and fire.
Strip the wire at terminal block:
1
2 3
1
Round pressure terminal
2
Cut out section
3
Cup washer
2
1
1
Stranded conductor wire
2
Round crimp-style terminal
1
Strip wire end to this point
2
Excessive strip length may cause electrical shock
or leakage.
WARNING
for a benefit kWh rate power supply like illustrated
below as type 1
■
If the benefit kWh rate power supply is of the type that
power supply is not interrupted, then control of the
heaters is still possible.
For the different possibilities of controlling heaters at
moments that benefit kWh rate is active, refer to "[D]
Benefit kWh rate power supply/Local shift value
weather dependent" on page 38.
If heaters must be controlled at moments that the
benefit kWh rate power supply is off, then these
heaters shall be connected to a separate power
supply.
■
During the period that the benefit kWh rate is active
and power supply is continuous, then stand-by power
consumption is possible (PCB, controller, pump, ...).
for a benefit kWh rate power supply like illustrated
below as types 2 or 3
Benefit kWh rate power supplies that completely shut
power supply are not allowed for this application because
of the water freeze prevention that would not be powered.
4PW64602-1A.book Page 24 Thursday, September 23, 2010 10:40 AM
