7
Compressor
8
Liquid stop valve
9
Gas stop valve
Switchbox
1
2
1
Reactor
2
Inverter PCB
3
Service monitor PCB
4
Power supply terminal
5
Communication terminal
6
Communication bottom plate heater
5.3. Functional diagram
1
2
3
1
Heat exchanger
2
4-way valve
3
Compressor
4
Accumulator
5
Expansion valve
6
Liquid stop valve
7
Gas stop valve
ERLQ018~030BAVJU
Outdoor unit for air to water heat pump
4PW62590-1 – 07.2010
4
5
6
6
3
5
6
7
4
6.
P
RECAUTIONS ON INSTALLATION LOCATION
WARNING
Be sure to provide for adequate measures in order to
prevent that the unit be used as a shelter by small animals.
Small animals making contact with electrical parts can
cause malfunctions, smoke or fire. Please instruct the
customer to keep the area around the unit clean and clear.
6.1. General precautions
Select an installation site that meets the following requirements:
There must be sufficient space for carrying the unit into and out
of the site.
The foundation must be strong enough to support the weight of
the unit. The floor is flat to prevent vibrations and noise
generation and to have sufficient stability.
The space around the unit is adequate for maintenance and
servicing.
The space around the unit allows for sufficient air circulation.
There is no danger of fire due to leakage of inflammable gas.
The equipment is not intended for use in a potentially explosive
atmosphere.
Select the location of the unit in such a way that the sound and
discharged cold/hot air generated by the unit does not disturb
anyone, and the location is selected according the applicable
legislation.
All piping lengths and distances have been taken into
consideration.
Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
Units cannot be installed hanging from ceiling or
NOTE
stacked.
Do not install the unit in places such as the following:
Where there is mist of mineral oil, oil spray or vapour for
example a kitchen.
Plastic parts may deteriorate, and cause them to fall out or
water to leak.
Where corrosive gas, such as sulphurous acid gas, is
produced.
Corrosion of copper pipes or soldered parts may cause the
refrigerant to leak.
Where there is machinery which emits electromagnetic
waves.
Electromagnetic waves may disturb the control system, and
cause malfunction of the equipment.
Where flammable gases may leak, where carbon fiber or
ignitable dust is suspended in the air or where volatile
flammables, such as thinner or gasoline, are handled.
Such gases may cause a fire.
Where the air contains high levels of salt such as that near
the ocean.
Where voltage fluctuates a lot, such as that in factories.
In vehicles or vessels.
Where acidic or alkaline vapour is present.
Installation manual
4