Sanyo SGP-M2 Procedimientos Y Puntos Técnicos Para La Instalación Del Sistema página 36

• 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,
including branch tubes. Make sure that
there are no gaps or openings in the
thermal insulation that may allow mois-
ture 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 leak-
age 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 effects 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. (Same for
both the gas and liquid sides.)
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.
3-tube line
Duct (or similar) tape
Discharge gas tube
(medium)
Thermal insulation
2-tube line
Liquid tube
(narrow)
Thermal insulation
Fig. 18
Rotate the tab 90 degrees.
Fully closed (time of shipping)
Fig. 19 Rotating the Tab
GB - 36
Pink
Liquid
Siphon tube
refrigerant
R410A tank
Suction gas tube
(wide)
Liquid tube (narrow)
Gas tube (wide)
Fully open