Operation Instructions - Hitachi ATW-RTU-04 Installation And Operation Manual

OPERATION INSTRUCTIONS

2 OPERATION INSTRUCTIONS
2.1 HEAT PUMP RELAY (RECEIVER)
Green LED Demand (ON) Light ON
Red LED Demand (OFF) Light OFF
BIND button Binding process
2.2 THERMOSTAT
2.2.1 Explanation of the icons
Setting temperature
The figure appearing on the screen corresponds
to the setting temperature, instead of the current
room temperature.
Heating on
Heating is demanding, and thus the heat pump
should be in operation, either intermittent or
continuous.
Heat pump relay connection
The thermostat is successfully connected to the
heat pump relay.
Low battery
It is necessary to replace the batteries immediately.
RF communication error
These icons flash to indicate that the signal from
the heat pump relay is not properly received.
Check that the heat pump relay is powered on, and
consult with your installer if this does not fix the
problem.
Defective thermostat
The thermostat is defective and needs to be
replaced.
No power to the thermostat
If the thermostat screen appears blank after initial
installation, then check whether the protective film
has been removed from the batteries. Otherwise,
try replacing the batteries.
2.2.2 Setting of room temperature
The current room temperature is shown in the display. The
setting temperature can be changed by turning the dial to
the right to increase temperature, and to the left to reduce
temperature. The setting temperature changes in 0.5ºC steps,
one for each 'click' as the dial is turned.
3 PMML0410A rev.0 - 03/2016
2.1.1 Reset
To reset the stored data in ATW-RTU-04 press BIND button
during 15 seconds.
The display changes to current room temperature again after
five seconds have passed. Then the thermostat tries to maintain
the set temperature as accurately as possible. The setting
temperature can be checked by turning the dial one 'click' to the
left or right. It will flash up for a few seconds, before returning to
the display of room temperature again.
2.2.3 Night temperature reduction
It is recommended to set the thermostat to a lower temperature
at night and during absence periods, as it helps to save energy.
In general a reduction of 5°C is suggested, but this depends on
the heating system and the amount of insulation of the building.
2.2.4 Installation menu
The single zone thermostat has an installation menu that is used
to set the maximum and minimum temperature limits.
The maximum temperature that can be set on the thermostat is
35ºC and the minimum temperature is 5ºC.
0.1s 0.1s 0.1s
0.9s 0.9s