Sanyo SGP-M2 Manuel D'installation page 17

• When charging with additional refrigerant, use liquid only.
• R410A cylinders are colored gray with a pink top.
• Check whether a siphon tube is present (indicated on the label at the
top of the cylinder).
• Depending on refrigerant and system pressure, conventional refrig-
erant (R22, R407A) equipment may or may not be compatible with
R410A equipment, so care is needed. In particular, the gauge mani-
fold used must be specifi cally designed for R410A.
• Be sure to check the limiting density.
• Refer to the section "4. OPENING THE CLOSED VALVES" when the
instructions call for fully opening all valves.
3-6. Finishing the outer tubing covering
• Apply thermal insulation to all tubing, in-
cluding branch tubes. Make sure that there
are no gaps or openings in the thermal
insulation that may allow moisture to enter.
Use thermal insulation that can withstand
a minimum of 120°C for the gas side (wide
tube system), and a minimum of 80°C for
the liquid side (narrow tube system).
Failure to do so can result in water leakage
and dripping condensation, leading to wall
discoloration, puddling, etc.
• Use separate piping for the power cables
and the control cables. If the cables are
passed through the same pipes, the ef-
fects of electrical noise and induction can
cause malfunctions.
4. OPENING THE CLOSED VALVES
Ball valves are used for the closed valves on the outdoor unit. Each can be opened and closed by rotating
the tab 90 degrees.
Follow the procedure below to securely open the valves.
1. Remove the cap.
2. Slowly and securely turn the tab to the
left (counterclockwise) 90 degrees. (Do
the same for the gas, liquid, and balance
tubes.)
The valve is fully open when the tab has
been rotated 90 degrees (when it contacts
the stopper). Do not forcefully attempt to
turn the tab past this point.
Be sure to open the closed valve all the way.
Thermal insulation
(120°C or higher heat resistance)
Control cable
Gas tube
Thermal insulation
Fig. 19
Rotate the tab 90 degrees.
Fully closed (time of shipping)
Fig. 20 Rotating the Tab
GB - 17
Pink
Liquid
Siphon tube
refrigerant
R410A tank
Duct (or similar) tape
(for waterproofi ng)
Thermal insulation
Liquid tube
Balance tube
Fully open