Combinations With Indoor Units; Checking The Accessories; Selection Of Installation Site - Mitsubishi Electric PUMY-71 Manual De Instalación

2. Combinations with indoor units

Indoor units which can be connected to outdoor units are shown in the
following tables.
Total capacity and number of connectable indoor units
Total capacity of
Outdoor unit model
indoor units
PUMY-71VM 35 to 93
PUMY-125VM/YM/YMA 63 to 163

3. Checking the accessories

In addition to this manual, the following parts are supplied with the out-
door unit.
They are used for group operation with more than two outdoor units. For
details refer to page 18 and 19.

4. Selection of installation site

Select space for installing the outdoor unit, which will meet the following
conditions:
• No direct thermal radiation from other heat sources
• No possibility of short cycle operations caused by exhaust heat from
the unit
• No possibility of annoying neighbors by noise from the unit
• No exposure to strong wind
• No possibility of snow damage
• Fixture with strength which bears the weight of the unit
• Note that drain flows out of the unit when heating
• With space for air passage and service work shown opposite.
Because of the possibility of fire, do not install the unit to spaces
where generation, inflow, stagnation, and leak of combustible gas is
expected.
• Avoid unit installation in a place where acidic solutions and spray
(sulfur) are often used.
• Take into account the following points if there are chances that cool-
ing operation will be required when the out door temperature is 10°C
or lower. (Allowable outdoor temperature is -5°C.)
Do not install the outdoor unit in places where it may be exposed
•
directly to rain, snow or wind.
If the above location is unavoidable, optional anti-snow ducts or
•
air outlet guides must be installed.
Install the outdoor unit on the same floor or in a position higher
•
than the indoor units.
In principle, the outdoor unit must be installed in a position higher
•
than the indoor units. If the outdoor unit has to be installed in a
position lower than the indoor units, keep the difference in height
to within 4 m.
• Do not use the unit in any special environment where oil, steam and
sulfuric gas exist.
Restriction on installing the outdoor unit to conduct cooling operation under
the outdoor temperature of 10°C or less.
(At the same or above the floor on which the indoor unit is installed)
A 4m or less
4
Note:
(1) The total capacity of indoor units is the sum of the figures in
(2) Combinations in which the total capacity of indoor units exceeds
Number of indoor units
1 to 4
1 to 8
Precautions
Installation on a rooftop or other windy places
When installing the unit on a rooftop or other location unprotected from
the wind, situate the unit's air outlet so that it is not directly exposed to
strong winds. Strong wind entering the air outlet may impede the normal
airflow and cause malfunctions.
The following shows three examples of precautions against strong winds.
1 Face the outlet toward any available wall at least 50 cm away
2 Install an optional air outlet guide and if the unit is installed at a
3 Position the unit so that the air outlet blows perpendicularly to
1
their model names which represent the unit's output capacity.
the capacity of the outdoor unit will reduce the output of each
indoor unit below their rated output. Thus, combine indoor units
with an outdoor unit within the outdoor unit's capacity.
Grounding lead wire (×2) (green/yellow)
A
from the wall.
place where the powerful blast of a typhoon, etc. comes directly
into the air outlet.
the seasonal wind direction, if possible.
3
2
Air outlet
guide
Strong wind
90°