Installation Of The Outdoor Unit; Electric Wiring Work; Drain Piping Work; Connection Of Refrigerant Pipings - Mitsubishi Heavy Industries SRK25ZJP-S User Manual

INSTALLATION OF THE OUTDOOR UNIT

Fixing of outdoor
Make sure that the unit is stable in installation. Fix the unit to
stable base.
When installing the unit at a higher place or where it could be
toppled by strong winds, secure the unit firmly with foundation
bolts, wire, etc.

Drain piping work

Execute drain piping by using a drain elbow and
drain grommets supplied separately as optional
parts, where water drained from the outdoor unit is
a problem.
Water may drip where there is a larger amount of
drain water. Seal around the drain elbow and drain
grommets with putty or adequate caulking
material.
Condensed water may flow out from vicinity of
operation valve or connected pipes.
Where you are likely to have several days of sub-
zero temperatures in a row, do not use a drain
elbow and drain grommets. (There is a risk of
drain water freezing inside and blocking the drain.)

CONNECTION OF REFRIGERANT PIPINGS

Preparation
Keep the openings of the pipes covered with tapes etc. to prevent dust, sand, etc. from entering them.
Indoor
(Do not turn)
Press
Remove
Remove the flared nuts. (on both liquid and gas sides)
Flaring work
Measurement B
Copper pipe diameter
Flaring block
Copper pipe
Connection
Liquid side
Indoor
Gas side
(Do not turn)

Electric wiring work

Perform wiring, making wire terminal numbers conform to
terminal numbers of indoor unit terminal block.
Connect using ground screw located near
Model 09, 12, 25, 35
CAUTION
Do not put a grommet
on this hole.
This is a supplemen-
tary drain hole to dis-
charge drain water,
when a large quantity
of it is gathered.
Drain elbow
Drain hose
(To be procured on the installer's part)
Grommet
Outdoor
Press
Remove
Remove the flared nuts. (on both liquid and gas sides)
Measurement B (mm)
Conventional (R22) flare tool
Clutch type flare tool for
R410A Clutch type
6.35 0.0 ~ 0.5 1.0 ~ 1.5
9.52 0.0 ~ 0.5 1.0 ~ 1.5
12.7 0.0 ~ 0.5 1.0 ~ 1.5
Outdoor Liquid side
Gas side
mark.
Model 18, 50
When condensed water needs to be led to a drain,
etc., install the unit on a flat base (supplied
separately as an optional part) or concrete blocks.
Then, please secure space for the drain elbow and
the drain hose.
Drain elbow
Drain hose
(To be procured on the installer's part)
Grommet
Dimension A
Liquid side : 9.1(mm)
A
Gas side Model 09, 12, 25, 35 : 13.2 (mm)
Model 18, 50 : 16.6 (mm)
Install the removed flared nuts to the pipes to be connected, then flare the pipes.
Use a flare tool designed for R410A or a conventional flare tool.
Please note that measurement B (protrusion from the flaring
Wing nut type block) will vary depending on the type of a flare tool in use.
If a conventional flare tool is used, please use a copper pipe
1.5 ~ 2.0
gauge or a similar instrument to check protrusion so that you can
1.5 ~ 2.0
keep measurement B to a correct value.
2.0 ~ 2.5
CAUTION
Do not apply excess torque to the flared nuts.
Otherwise, the flared nuts may crack depending
Indoor - Outdoor connecting wire
Clearance
CAUTION
Do not apply refrigerating
machine oil to the flared
surface.