Panasonic U-72MF1U9, Technical Data Manual

Page: 47 / 118

Design of 3WAY VRF SYSTEM
2 - 33
1
2
3
4
5
6
7
8
4. Installation Instructions
4-2. Removing Fin Guard for Heat Exchanger
After installation of the outdoor unit, detach the fin guard for
heat exchangers as following steps.
1.
remove it from the outdoor unit. Pay careful attention not
to damage the fin when cutting out the fin guard.
2.
Cut out the fin guard entirely attached to the panel and
If there is a case where easy to touch the sharp
aluminum fin of the outdoor unit, be sure to attach a
snow-proof ducting to the unit. It is recommended that
the outdoor unit be located away from the touched with
hands.
4-3. Shield for Horizontal Exhaust Discharge
It is necessary to install an air-discharge chamber (field
supply) to direct exhaust from the fan horizontally if it is
difficult to provide a minimum space of 7 ft. between the
air-discharge outlet and a nearby obstacle. (Fig. 2-9)
CAUTION
In regions with heavy snowfall,
the outdoor unit should be
provided with a solid, raised
platform and snow-proof
ducting (field supply). (Fig. 2-10)
4-4. Installing the Outdoor Unit in Heavy Snow
Areas
In locations where wind-blown snow can be a problem, snow-
proof ducting (field supply) should be fitted to the unit and
direct exposure to the wind should be avoided as much as
possible. (Fig. 2-11) The following problems may occur if proper
countermeasures are not taken:
The fan in the outdoor unit may stop running, causing the
unit to be damaged.
There may be no air flow.
The tubing may freeze and burst.
The condenser pressure may drop because of strong wind,
and the indoor unit may freeze.
4-5. Precautions When Installing in Heavy Snow
Areas
a)
depth. (Fig. 2-10)
b)
for the platform, and the platform should be installed
beneath the air-intake side of the outdoor unit.
c)
be secured with anchor bolts.
d)
The platform should be higher than the maximum snow
The 2 anchoring feet of the outdoor unit should be used
The platform foundation must be solid and the unit must
When installing on a roof subject to strong wind,
countermeasures must be taken to prevent the unit from
being overturned.
Fig. 2-9
Fig. 2-11
Fig. 2-10
DO
Fallen snow
AVOID
Without snow-
proof ducting
(Without platform) With snow-
proof ducting
(High platform)
TD831158-00̲3WAY̲VRF̲SYS.indb 33 TD831158-00̲3WAY̲VRF̲SYS.indb 33 2012/01/23 17:30:17 2012/01/23 17:30:17