Figure 12-36 Precharging refrigerant
(1) Refrigerant cylinder
(2) Electronic balance
(3) Pressure gauge
(4) Connection nut
(5) Low pressure needle valve (6) Liquid pipe needle valve
Step 2 Slightly open the refrigerant cylinder valve and slightly loosen the connection nut
of the pressure gauge and rubber hose. Tighten the nut when cold air escapes out
of the nut.
Step 3 Put the refrigerant cylinder upside down on the electronic balance. Clear the
reading on the balance.
NO TICE
If the R410A refrigerant is configured, put the refrigerant cylinder upside down
when charging refrigerant. If you purchase the R410A refrigerant by yourself,
confirm with the supplier whether the cylinder is equipped with a siphon. If the
cylinder has a siphon, stand the cylinder when charging refrigerant. If the cylinder
has no siphon, put the cylinder upside down when charging refrigerant. These
measures ensure that the refrigerant is charged in the liquid state.
Step 4 Open the low pressure gauge valve. Charge 1 kg of refrigerant from the low
pressure side, and then close the low pressure gauge valve. Then open the high
pressure gauge valve and charge the remaining refrigerant from the liquid pipe
needle valve.
NO TICE
Do not move the hose or refrigerant cylinder when charging refrigerant.
Otherwise, the reading on the electronic balance will be affected.
Step 5 The amount of pre-charged refrigerant must be greater than or equal to half of
the total charge amount calculated and less than or equal to the total charge
amount. If the total refrigerant amount cannot be fully pre-charged, charge the
remaining amount of refrigerant during power-on commissioning.
Step 6 After the refrigerant is charged, close all pressure gauge valves and the refrigerant
cylinder valve.
FusionCol8000-E240 Modular Indirect Evaporative
Cooling System
User Manual
12 Component Replacement
Issue 03 (2021-04-20) Copyright © Huawei Digital Power Technologies Co., Ltd.
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