REVIEWED BLD2022-1140+Installation+8.23.2022_10.44.25_AM+3066988Wind and snow can significantly reduce capacity and the defrost efficiency. Below is a quick install guide for cold weather applications.
0 Installation location
Be aware of the prevailing wind direction in winter
and install the outdoor unit where it is sheltered from
the wind when possible. When not possible, it is
recommended to use an accessory wind baffle
Units are easily affected by
wind and unit may not be
able to run at full capacity
1
1 �
Less influence of wind and unit runs at full capacity
Measures for snow
Measures for drainage of water
■Case 1: Unit installed near walkway
Do not install the unit near a walkway as the drainage
water can freeze causing a slip hazard
Point!
lDInstall at a sufficient height from the ground
to prevent problems caused by frozen
drainage water.
Z2 Install in a location where frozen drainage
water will not be a hazard.
(3)Install in an upright position to allow proper
drainage from the drainage outlet.
M&P Series
■ Unit is installed on the ground
To avoid the adverse effects of snow, ice and defrosting issues, install the unit
on a stand to ensure a sufficient height from the ground
• Point!
um\• 1Olnstall at a position/height to prevent the unit being
buried in snow*' and the adverse effects of frozen
drainage water.+'
(O Install so as to avoid the effects of snow or snowdrift.
3�Install so as to avoid the damage from falling snow or icicles.
*+ Install at a height above the highest snowfall depth.
*Z Even for correct installations, dripping drainage water may
form an icicle which needs to be cleared away regularly to
prevent a blocked drainage outlet.
0
Unit may become buried in snow I Unit may be damaged
due to heavy snowfall, snow sliding J due to snowfall or icicles.
off the roof or snowdrift. I
■ Install snow protection hood as necessary
Eir1,E-II ON
[ City Multi ]
•. • *#A -
The top hood prevents
snow from coming in,
accumulating inside
the unit and covering i FigureJFillrpl..
the heat exchanger. C
. + When installing units
The side and rear hood "J I'° side by side, install
prevents snow from a filler plate between
covering the heat Z the fan guard and the
exchanger. ®outlet &Inlet(Uniemm[in.]) outlet -side snow hood.
(Front view) (Side view)
REVIEWED
Drainage water
splashes on
pedestrians.
III
Frozen drainage water
may cause a slipping
hazard.
Use a stand to add sufficient height to
protect the unit's heat exchanger from
snow and prevent icicles forming
during defrost operation.
Air exhaust
• �� snow hood
• Air intake
ow hood
(side panel) Air inl
Minimum height (h) r snow
should be higher (rear)
than the highest
snowfall depth (in
(hO+8"=h)
/Without hood
Unit may become
covered in snow
if the stand height
is insufficient. Stand —�
Stand is too low.
Without the hood, heat exchanger
becomes covered with snow.
CITY OF EDMONDS
■ Case 2 : Multiple units are installed
Do not install units on top of one another as it may
cause frozen drainage water on the bottom unit.
Use a stand with a steel framework that allows water to drain properly.
The width of the stand's base must not exceed the width of the unit.
Cross-section viewed
from the side
Clearance is
too small,
causing
SStand top inadequate
scovered drainage.
• Ice forms
Damage to heat
Cross-section viewed exchanger due to ice
from the side formation.
■ Necessity of accessories (drain socket & centralized drain pan, stand, snow protection hood, base heater)
Snowy region Cold region
Remarks
Countermeasures for snow Countermeasures for freezing
Drain socket,
Centralised
Not used Not used
Prevents freezing
drain pan
1.Install so as to prevent the unit being buried Clearance to prevent
p 9 snow accumulating.
in snow (at a height greater than the highest
snowfall depth). Be sure that the stand does
Stand
Needed
Needed
not obstruct drainage.
2.lnstall so as to prevent damage to the unit (Correct)
due to frozen drainage water (icicles).
Use a stand with a steel framework that allows water to drain properly.
The width of the stand's base must not exceed the width of the unit.
Needed
Snow '
X When the installation
1. Prevents heat exchanger from being covered in snow.
protection
position is subject to
—
2. Prevents snow accuulating inside the air duct
snowfall.
Outdoor units equipped with a heater for cold regions are those with an "H"
in the model name. For the cold -climate zone, use of a unit with a heater is strongly
recommended. Even for the moderate -climate zone use of a unit with a heater is
recommended for regions subject to high humidity in winter.
[City Multi]
The base heater prevents damage to the heat exchanger and pipes which
may be caused when the base of the unit freezes. Place the base heater along
Base heater
Needed
Needed
the groove on the unit base and secure with brackets.
Note: Please consult Mitsubishi Electric or one of its dealers/resellers in the case that a base
heater is required.
Fan guard
Fin guard�Fan
Control box
Heatexchanger
° Base heater
Side panels Front panels
When the unit is installed in cold
or snowy regions:
Drainage water may
freeze in the drain
socket/hose and
prevent the fan from
rotating.
Do not attach a drain
socket packaged as an
accessory to the unit.
* In the case that fitting a drain socket is
absolutely necessary, steps must be taken
so that the drainage water does not freeze.
For more information, please consult
Mitsubishi Electric or one of its
dealers / resellers.
BLD2022-1140
RECEIVED
Aug 25 2022
CITY OF EDMONDS
DEVELOPMENT SERVICES
DEPARTMENT