Selecting An Installation Site; Installing The Fresh Master - Mitsubishi Electric Fresh Master GUF-50RDH4 Installation Instructions Manual

4. Selecting an installation site

- Select a site with sturdy fixed surface sufficiently durable against
the weight of unit.
- Before installing unit, the route to carry the unit to the installation
site should be determined.
- Select a site where the unit is not affected by entering air.
- Select a site where the flow of supply, return, exhaust and outdoor
air is not blocked.
- Select a site where refrigerant piping and exhaust/outdoor ducts
can easily be led to the outside.
- Select a site which allows the supply air to be distributed fully in
room.
- Select a location where the inspection opening can be installed.
- Do not install unit at a site with oil splashing or steam in large quanti-
ties.
- Do not install unit at a site where combustible gas may generate,
flow in, stagnate or leak.
- Do not install unit at a site where equipment generating high frequen-
cy waves (a high frequency wave welder for example) is provided.
- Do not install unit at a site where fire detector is located at the
supply air side. (Fire detector may operate erroneously due to the
heated air supplied during heating operation.)
- When special chemical product may be scatter all around such
as site chemical plants and hospitals, full investigation is required
before installing unit. (The plastic components may be damaged
depending on the chemical product applied.)
- Do not install this product in a refrigerated warehouse, heated
swimming pool or other location where the temperature and hu-
midity are significantly different.
(Failure to heed this warning may result in electrical shock or
malfunction.)
- The electro-magnetic susceptibility has been chosen at a level
that gains proper operation in residential areas, on business and
light industrial premises and on small-scale enterprises, inside as
well as outside of the buildings. All places of operation are charac-
terised by their connection to the public low voltage power supply
system.

5. Installing the Fresh Master

5.1. Fixing hanging bolts
(Use M10 or M12 hanging bolts. The bolts and washers should be
supplied in the field.)
(Give site of suspension strong structure.)
Hanging structure
- Ceiling: The ceiling structure varies from one building to another.
For detailed information, consult your construction company.
1 Reinforcing the ceiling with additional members (edge beam,
etc.) must be required to keep the ceiling at level and to prevent
the ceiling from vibrations.
2 Cut and remove the ceiling members.
3 Reinforce the ceiling members, and add other members for fixing
the ceiling boards.
4.1. Install the Fresh Master on a ceiling
strong enough to sustain its weight
Warning:
- The unit must be securely installed on a structure that can
sustain its weight. If the unit is mounted on an unstable
structure, it may fall down causing injuries.
4.2. Securing installation and service
space
- Select the optimum direction of supply airflow according to the
configuration of the room and the installation position.
- As the piping and wiring are connected at the side surfaces, and
the maintenance is made at the same surfaces, allow a proper
space properly. For the efficient suspension work and safety,
provide a space as much as possible.
4.3. Standard installation examples
EA
(exhaust)
OA
(outdoor)
Maintenance
space
Cistern tank
Duct downward
Deionizer
gradient to wall
(more than 1/30)
Deep hood or
weather cover
EA
(exhaust)
OA
(outdoor)
Supply pipe
Inspection
opening
Drain pipe gradient to wall
(more than 1/100)
- Mount the washers (outer diameter of >21 mm for M10, >24 mm
for M12) and nuts obtained from a field supply onto the pre-
recessed hanging bolts (M10 or M12) also obtained from a field
supply, as shown in the figure.
Hanging bolt (M10 or M12)
Nut
Washer
Nut
Hanging bolt location
Exhaust grille
Inspection opening
Supply grille
Duct (provided by
Hanging bolt
customer)
(provided by customer)
Servicing
Supply
valve
RA SA
Exhaust
grille
(return) (supply)
grille
6