Suspending The Indoor Unit; Kit) (Cz-P160Rvk2); Installing The Refrigerant Tubing - Panasonic S-22MU1E5 Installation Instructions Manual

3-27. Suspending the Indoor Unit

Depending on the ceiling type:
●
Insert suspension bolts as shown in Fig. 3-73
Hole-in-anchor
Hole-in-plug
Suspension bolt (M10 or 3/8")
(field supply)
or
●
Use existing ceiling supports or construct a suitable support
as shown in Fig. 3-74.
WARNING
It is important that you use extreme care in supporting
the indoor unit inside the ceiling. Ensure that the ceiling
is strong enough to suport the weight of the unit. Before
hanging the unit, test the strength of each attached
suspension bolt.
(1) When placing the unit inside the ceiling, determine the
pitch of the suspension bolts referring to the dimensional
data given previously. (Figs. 3-69 and 3-70)
Tubing must be laid and connected inside the ceiling when
suspending the unit. If the ceiling is already constructed,
lay the tubing into position for connection to the unit before
placing the unit inside the ceiling.
(2) Screw in the suspension bolts allowing them to protrude
from the ceiling as shown in Fig. 3-73. (Cut the ceiling
material, if necessary.)
(3) Suspend and fix the indoor unit using the 2 hexagonal nuts
(field supply) and special washers (supplied with the unit)
as shown in Fig. 3-75.
Hexagonal nuts
and washers
(2 sets)
Concrete
Insert
Fig. 3-73
Ceiling tiles
Ceiling support
Fig. 3-74
Suspension bolt
Fig. 3-75
■ RAP Valve Kit (Refrigenrant Accumulation
Protector Valve Kit) (CZ-P160RVK2)
When installing a E1 type indoor unit (either the 8-hp 224 type
or 10-hp 280 type), you must also install the RAP Valve Kit
(CZ-P160RVK2).
●
Connect 2 RAP valve kits in parallel for 224 or 280 type.
●
Secure the RAP valve kit using suspension bolts, etc. within
30 meters from the indoor unit.
●
Do not place the RAP valve kit directly on the ceiling.
Gas tube ø15.58
Supplied
strainer assembly
Indoor Unit Side
Liquid tube ø9.52
6P connector (5 m)
354
80
Note: This figure shows the valve body with the suspension hook
and strainer assemblies installed.

3-28. Installing the Refrigerant Tubing

The size of the refrigerant tubing is as shown in the table below.
Table 3-4
Gas tube
(Brazing connection)
Liquid tube
(Flare connection)
●
When brazing the gas tubing, cool the tubing with dampened
shopcloths as you work, as shown in the figure below, to
protect the unit's thermistor from the heat generated by
brazing.
Gas tubing
29
Gas tube ø15.88
Suspension
hook
Outdoor Unit Side
CAUTION
Liquid tube ø9.52
Service cover
319 372
159.5
Valve body
80
1045
224 Type 280 Type
ø19.05 ø22.22
(Brazing connection)
ø9.52
(Flare connection)
Thermistor (inside unit)
Dampened shopcloths
Supplied strainer
assembly
Unit: mm
Fig. 3-76
ø9.52
Fig. 3-77