Cooler Service Requirements; Electrical Power Supply To The Cooler; Water Supply To The Cooler; Installing The Wall Control - Rinnai A20 Installation Manual

A qualified electrician MUST install the 240 Volt wiring according to local regulations.
Switch OFF the power and unplug the Cooler before touching any wiring. If any
IMPORTANT
electrical wiring is damaged, it MUST BE replaced by the manufacturer, its service
agents or an electrically qualified technician, in order to avoid a hazard.
The electricity supply MUST BE 240 Volt / 50 Hertz, and from an authorised power
supplier. Generators should NEVER be used, as their output may be incompatible
with or damage the Cooler's electronic control system.

2.1 ELECTRICAL POWER SUPPLY TO THE COOLER

The Cooler is pre-wired with a 3-pin plug and lead, and should be plugged into a standard 10 Amp - 240 Volt fixed
switched socket outlet located within the roof cavity, in close proximity to the dropper duct. The fixed switched
socket outlet should be wired back to the meter box on a dedicated power circuit.

2.2 WATER SUPPLY TO THE COOLER

The Cooler's water system is designed to operate with a water supply pressure between 300 kPa and 1000 kPa.
If the supply pressure is excessive, a pressure-reducing regulator will be required. If the pressure is insufficient
the Cooler's operation will be compromised. In areas subject to water pipes freezing, provision MUST BE made to
drain water piping to prevent damage to the Cooler.
•
Ensure the supply piping has been flushed before connecting it to the Cooler.
•
A registered licensed plumber MUST install the water supply piping and connection to the Cooler in accordance
with the local water supply regulations.
•
An isolating valve on the supply pipe MUST be placed external and adjacent to the unit, not inside the ceiling. This
MUST BE provided to facilitate isolation of the water or to disconnect the water supply piping when servicing.
•
Non-return isolating valves on the water supply are not recommended as they may cause damage or lock up the
Cooler's inlet mechanism where high lock-up pressures or freezing water in pipes may occur.
•
For the owner's convenience, an additional isolating valve may be provided at ground level to isolate the water
supply.
•
The water supply pipe MUST BE supported and secured so as not to place strain on the Cooler's water
connection fittings or cause water hammer noise.
•
Water quality should be checked and filtration fitted where necessary e.g. tank or bore water.
•
DO NOT remove water supply line, (braided hose) from rear of cooler.

2.3 INSTALLING THE WALL CONTROL

The Rinnai Networker and Manual Wall Control are part of a sophisticated control system. Controllers with Auto
mode constantly monitor the temperature inside the house, switching the Cooler ON and OFF to maintain the
target comfort level selected. To do this effectively, the wall control MUST BE positioned correctly:
•
Install the wall control within the area being cooled: It is important that the Wall Control is placed in a
position that will provide the most accurate reading of the temperature within the area being cooled.
•
Attach to an internal wall: The temperature difference on an external wall can affect the reading, so always
mount the wall control on an internal wall. Also keep the hole in the wall for your wiring as small as possible to
prevent draughts from within the wall cavity affecting the temperature sensing.
•
Get the height right: The Wall Control should be approximately 1500mm above floor level.
•
Avoid hot spots: Keep it as far away as possible from heat sources, e.g. above electrical equipment, direct
sunlight and walls backing onto wall-ovens and stoves.
•
Avoid cold spots: Ensure that the Wall Control is not affected by draughts coming through doorways, windows
and stairwells, and is not placed too close to cooling outlets.
•
Avoid dead spots: Don't site it in areas with no or little circulation, e.g. behind doors, in corners or alcoves.
•
Interference from other electrical connections: Ensure the thermostat and wiring are kept away from other
electrical, data and antenna cables.
•
Use the right cable: Ensure the cable is 0.75mm
Rinnai

2. COOLER SERVICE REQUIREMENTS

in cross section and less than 100m in length.
2
7
Switch
Active Neutral
Earth
Evap AC IM