Gree GMV-WQ120WM/A-F, Руководство пользователя

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Water-cooled Heat Recovery DC Inverter VRF
34
to operate alternately and equalize the operation time. If the water flow switch of the system detects
any malfunction, master water pump will be switched to the salve water pump automatically. If the
water flow cannot be restored yet, the system stops.
4.9.4 Water quality requirements.
The plate heat exchanger for ODU is designed in the brazed non-detachable structure. To
prevent corrosion and scale deposit, water quality for plate heat exchanger should be specially
controlled.
Recommend standards for cooling water, hot water and replenished water.
Ba
si
c i
te
ms
Item Unit
Cooling water system Hot water system Inclination
Circulating
water
Replenished
water
Circulating
water
Replenished
water
Corrosion
Scale
deposit
PH (25
℃
)
- 6.5-8.2 6.0-8.0 7.0-8.0 7.0-8.0
● ●
Conductivity (25
℃
)
μS/cm
＜
80
＜
30
＜
30
＜
30
● ●
Cl mg(Cl-)/L
＜
200
＜
50
＜
50
＜
50
●
-
SO mg(SO
4
2-
)/L
＜
200
＜
50
＜
50
＜
50
●
-
Acid consumption
(PH4.8)
mg(CaCO
3
)/L
＜
100
＜
50
＜
50
＜
50
-
●
Total hardness mg(CaCO
3
)/L
＜
200
＜
70
＜
70
＜
70
-
●
Calcium hardness mg(CaCO
3
)/L
＜
150
＜
50
＜
50
＜
50
-
●
Ionized silicon mg(SiO
2
)/L
＜
50
＜
30
＜
30
＜
30
-
●
R
ef
er
e
nc
e i
tem
s
Fe mg(Fe)/L
＜
1.0
＜
0.3
＜
1.0
＜
0.3
● ●
Cu (mg(Cu)/L
＜
0.3
＜
0.1
＜
1.0
＜
0.1
●
-
Sulfate ion mg(S
2-
)/L
Not
detectable
Not
detectable
Not
detectable
Not
detectable
●
-
Ammonium ion mg(NH
4
+
)/L)
＜
1.0
＜
0.1
＜
0.3
＜
0.1
●
-
Residual chlorine mg(Cl
-
)/L
＜
0.3
＜
0.1
＜
1.0
＜
0.1
●
-
Free carbon dioxide mg(CO
2
)/L)
＜
4.0
＜
4.0
＜
4.0
＜
4.0
●
-
Stability index - 6.7-7.0 - - -
● ●
Remarks:
①
In the “Corrosion” and “Scale deposit” columns, “●” means the factor related to corrosion or
scale generation.
②
The cooling water used for closed cooling tower, circulating water and replenished water of
the closed loop should comply with water quality standards of hot water system; the
dispersed water and its replenished water should comply with standards of the circulating
chilled water system.
③
When the temperature is hig
h (≥40
℃
), the corrosion is significant. Especially when the
material is not provided with a protecting film or is in contact with water, it is preferred to
adopt effective anticorrosive measures, e.g., add preservative and perform degasification.
④
User should not adopt open circulating water flow as which will result in corrosion.