Panasonic WH-SDC09C3E8, Service Manual

Page: 38 / 141

38
CAUTION
CAUTION

If old heatpump terminal/tank is utilized, please
clean the dust properly before installation.

Refer Diagram 4.1 for installation of 3-way Valve Kit
and 2-way Valve Kit.

Must install an external filter (30 mesh or more, field
supply) before water inlet connector of indoor unit
(indicated with “WATER IN”).

Connect the external filter inlet to boiler tank outlet.
Then, connect water outlet connector of indoor unit
(indicated with “WATER OUT”) to boiler tank inlet.
Fail to connect the tube appropriately might causing
the indoor unit malfunction.

Be sure to use two spanners to tighten the
connection. Further tighten the nuts with torque
wrench in specified torque as stated in the table.

If non-brass metallic piping is used for installation,
make sure to insulate the pipes to prevent galvanic
corrosion.

Make sure to insulate the water circuit pipes to
prevent reduction of heating capacity.

After installation, check the water leakage condition
in connection area during test run.

Finally, mount the PS foam 7 and long
banding strap
8
to water inlet and outlet
connectors, as shown in below illustration.
Nut size (Torque)
Model
Water
SDC09C3E8/UD09CE8,
SDC12C9E8/UD12CE8,
SDC14C9E8/UD14CE8,
SDC16C9E8/UD16CE8
Rp 1¼” [117.6 N•m]
Do not over tighten, over tightening cause water leakage.
11.3.3.3 Indoor Unit Refrigerant Pipe
Installation
1 Please make flare after inserting flare nut
(located at joint portion of tube assembly) onto
the copper pipe. (In case of using long piping)
2 Do not use pipe wrench to open refrigerant
piping. Flare nut may be broken and cause
leakage. Use proper spanner or ring wrench.
3 Connect the piping:
o
Align the center of piping and sufficiently
tighten the flare nut with fingers.
o
Further tighten the flare nut with torque
wrench in specified torque as stated in the
table.
Piping size (Torque)
Model
Gas Liquid
SDC09C3E8/UD09CE8,
SDC12C9E8/UD12CE8,
SDC14C9E8/UD14CE8,
SDC16C9E8/UD16CE8
ø15.88mm (5/8”)
[65 N•m]
ø 9.52mm (3/8”)
[42 N•m]
Do not over tighten, over tightening cause gas leakage.
11.3.3.4 Drain Hose Installation

Use inner diameter 15 mm drain hose in the market.

This hose must to be installed in a continuously
downward direction and in a frost-free environment.

Guides this hose’s outlet to outdoor only.

Do not insert this hose into sewage hose or
cleaning hose that may generate ammonia gas,
sulfuric gas, etc.

If necessary, use hose clamp to further tighten the
hose at drain hose connector to prevent leakage.

The water may drip from drain hose . Therefore
must ensure the outlet of the hose is always not
closed or not blocked.