Waterstage WS G140DC6 Series, Installation And Operating Manual

Page: 20 / 64

2 7 4 Pump down operation (Refrigerant collecting
operation) single phase outdoor unit
• Preparation for pump down
Confirm that the power (ref. 3 , figure 7, page 10 ) is off,
and then open the service panel.
• Pump down procedure
- - 1 - Check the 3-way valves (both at the liquid side
and gas side) are opened.
-
-
2
- Turn the power on.
POWER
ERROR
PUMP
DOWN
(L1)
LOW NOISE PEAK CUT
MODE (L2) (L3) (L4) (L5) (L6)
● ○ ○ ○ ○ ○ ○ ○
- - 3 - Press "PUMP DOWN" switch for 3 seconds
or more after 3 minutes after power on.
POWER
ERROR
PUMP
DOWN
(L1)
LOW NOISE PEAK CUT
MODE (L2) (L3) (L4) (L5) (L6)
● ○ ● ○ ○ ● ● ●
LED display lights on as shown in the above figure,
and the fans and the compressor start operating. If the
"PUMP DOWN" switch is pressed while the compressor
is operating, the compressor will stop, then start again
in about 3 minutes.
- - 4 - LED display will change as shown below about
3 minutes after the compressor starts. Fully close
the 3-way valve on the liquid pipe side at this stage.
POWER
ERROR
PUMP
DOWN
(L1)
LOW NOISE PEAK CUT
MODE (L2) (L3) (L4) (L5) (L6)
● ○ ● ○ ○ ○ ● ●
If the valve on the liquid pipe side is not closed, the
pump down cannot be performed.
-
-
5
- When LED display changes as shown in the below
figure, close the 3-way valve on the gas pipe side
tightly.
POWER
ERROR
PUMP
DOWN
(L1)
LOW NOISE PEAK CUT
MODE (L2) (L3) (L4) (L5) (L6)
● ○ ● ○ ○ ○ ○ ●
-If the valve on the gas pipe side is not closed, refrigerant
may flow into the piping after the compressor stops.
4
Closing
direction
Liquid
pipe
Hexagon
wrench
Gas
pipe
5
Closing
direction
2 7 3 Additional charge
50 g of R410A
per additional meter
Length of
the connections
15 m 20 m max.
Additional charge none 250 g
The charge in the outdoor units corresponds to the
maximum distances between the outdoor unit and the
hydraulic unit defined in figure 15 . If the distances are
greater, an additional charge of R410A is required.
The additional charge depends on the distance
between the outdoor unit and the hydraulic unit for
each type of appliance. The additional charge of R410A
must necessarily be made by an approved refrigeration
engineer.
• Example of additional charge :
An outdoor unit 17 m away from the hydraulic unit will
require an additional charge of :
Additional charge = (17 - 15) x 50 = 100 g.
The charge must be introduced after creating the
vacuum and before the hydraulic unit is filled with gas,
as follows :
-Disconnect the vacuum pump (yellow hose) and
connect a bottle of R410A instead in the liquid
extraction position .
-Open the bottle’s valve.
-Bleed the yellow hose by loosening it slightly on the
manifold side.
-Place the bottle on scales with a minimum accuracy
of 10 g. Note the weight.
-Carefully open the blue valve slightly and check the
value shown on the scales.
-As soon as the value displayed has dropped by the
value for the calculated additional charge, close the
bottle and disconnect it.
-Then rapidly disconnect the hose connected to the
appliance.
-Proceed to fill the hydraulic unit with gas.
"
Warning
• Only use R410A !
• Only use tools suitable for R410A
(set of manometers).
• Always charge in the liquid phase.
• Never exceed the length or the maximum difference
in level.
R410A
figure 18 - Gas bottle R410A
Gas
Liquid
Installation and operating manual "1533 - EN"
Air to Water Heat Pump
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