Installation and operation manual
8
125A7V1B
VRV IV System indoor unit
4P325971-1B – 2012.07
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.
Take care that in the event of a water leak, water cannot cause
any damage to the installation space and surroundings.
Be sure that sufficient precautions are taken, in accordance with
the applicable legislation, in case of refrigerant leakage.
When installing the unit in a small room, take measures in order
to keep the refrigerant concentration from exceeding allowable
safety limits in the event of a refrigerant leak.
Do not climb, sit or stand on top of the unit.
Do not place any objects or equipment on top of the unit (top
plate).
Do NOT install the unit in places such as:
Where there is mist of mineral oil, oil spray or vapour.
Plastic parts may deteriorate, and cause them to fall out or water
to leak.
Do NOT install the unit in sound sensitive areas (e.g. near a
bedroom and the like), so that the operation noise will cause no
trouble.
Note: If the sound is measured under actual installation
conditions, the measured value will be higher than the sound
pressure level mentioned in Sound spectrum due to
environmental noise and sound reflections.
The foundation must be strong enough to bear the weight of the
unit.
Make sure, in the event of a water leak, water cannot cause any
damage to the installation space and surroundings.
In places with high humidity (max. RH=85%), for example a
bathroom.
In places where frost is possible. Ambient temperature around
the indoor unit should be >5°C.
The indoor unit is designed for indoor installation only and for
indoor ambient temperatures ranging 5~35°C in cooling mode
and 5~30°C in heating mode.
6.2.
Preparing water circuit
6.2.1.
Selection of the type of heat emitters
The selection of the heat emitter is the choice of the end customer.
The choice of the heat emitter will define the needed water
temperature from the unit.
Based on the needed water temperature for the heat emitters,
following range can be defined:
1
Low temperature (heating leaving water temperature range from
25°C to 40°C, cooling leaving water temperature range from
25°C to 18°C).
Typical example: floor heating.
2
Medium temperature (leaving water temperature range from
40°C to 45°C), cooling leaving water temperature range from
12°C to 7°C.
Typical example: low temperature radiators (heating) and
convectors (heating and cooling).
Once the heat emitters are chosen, the capacity of these heat
emitters should be defined and from this the dimensioning and
position of the heat emitters in the different rooms should be decided.
An important parameter of the heat emitters is the temperature
difference between entering water and leaving water.
This will define the water flow in the system.
Finally, the piping layout from the heat source to the different heat
emitters needs to be drawn.
This will finally define following important parameters:
Minimal water volume in the system.
Maximal water volume in the system.
Minimal and maximal water flow in system.
Maximal pressure drop in the system.
WARNING
Excessive refrigerant concentrations in a closed room can
lead to oxygen deficiency.
(mm)
