Mitsubishi Electric Fresh Master GUF-50RDH4 Instrucciones De Instalación página 10

6. Supply pipe and drain pipe work
Supply pipe work is not required for GUF-50, 100RD4. Only perform
the drain pipe work.
6.1. Supply pipe work
1. Connect a commercially available interlocked flexible metal hose
or the equivalent between the water supply pipe and the water filler
hole when performing pipe work for the water supply.
- Set the water pressure between 2×10
- Install the servicing valve near the strainer then install the
supply pipe.
Servicing valve
Cap
Discharge valve
Caution:
- The supply water should meet public waterworks standards,
and have a hardness less than 100 mg/ , otherwise the hu-
midifier will clog up.
- Install the discharge and servicing valve in locations acces-
sible from the inspection opening.
- Securely lock the supply pipe so that no force is applied to
the strainer.
- When performing the supply pipe work, wash the pipe with
fresh water prior to installation to prevent saw dust, etc. from
entering, or install a discharge valve in the piping and suffi-
ciently conduct water discharge before using until the water is
clear.
- Take caution as to not let cutting oil or detergent from entering.
- The supply and drain pipes must be installed as such that
they do not rest on the Maintenance cover and cover (humidi-
fier).
- The supply and drain pipes must be properly installed so that
there is no water leak.
- To prevent freezing when not using the unit for long periods
of time, close the servicing valve, open the discharge valve,
and remove the servicing valve and any water in the unit's
supply water entrance. After removing the servicing valve
and water, close the discharge valve.
2. Freeze-prevention work for extremely cold areas
Perform freeze prevention by wrapping a freeze-prevention
heater (field supply) on the supply pipe.
- Wrap a freeze-prevention heater all the way to the Fresh Mas-
ter.
- Insulation work must be performed upon the heater as well.
Pa to 49×10 Pa.
4 4
Supply pipe
Wrapping the freeze-prevention
heater.
6.2. Drain pipe work
1. Connect a vinyl chloride VP25 elbow to the drain discharge port.
2. The drain pipe must be properly insulated from the drain dis-
charge port.
VP25 elbow
Caution:
- The pipe must be installed with gradient of more than 1/100.
- The drain pipe must be installed so that water does not ac-
cumulate inside.
- Check to make sure that the end of the drain pipe is at a
location where discharge is possible and that the pipe can be
properly drained.
- Do not install the drain pipe as shown below.
(This will result in insufficient drainage)
- Do not insert the tip of the drain pipe into a gutter or the like.
Doing so will cause the gutter to freeze in the event of heavy
snowfall, resulting in water leakage from the main unit.
Air-bleeding
→
→
Drained
Drained
water
water
3. Make sure the pipe drains water properly.
(1) Remove the maintenance cover (for humidifying).
- Remove the seven mounting screws, slide the maintenance
cover to the right, and remove it from the potbelly-shaped
holes (six locations for Model 50).
(2) Pull out the inner lid.
(3) Pour approximately 1,000 cc of water onto the drain tray.
(4) Confirm that the drain pipe drains away water at the pipe's final
exit.
(5) Replace the inner lid and the maintenance cover (for humidify-
ing).
Water supply
hose
(field supply)
Inner lid
Drain tray
* The diagram shows GUF-50, 100RDH4
Drain discharge port
Drain pipe (gradient: 1/100 or more)
Vinyl chloride pipe VP25
Odor trap
Pass-over
Maintenance Cover
(humidifier)
8