Vertiv Liebert SRC-G Series User Manual

Vertiv™ | Liebert® SRC-G | User Manual
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Mechanical Installation
2.10.2. Adding Refrigerant for Long Piping System
Under the condition of the standard pipe length (within 10 m) there is no need to charge the refrigerant in the
indoor unit. If the pipe length exceeds 10 m then Liebert® SRC-G series can be charged with reference to the
recommended refrigerant charging amount. Add refrigerant to the system in order to ensure normal system
operation according to the following formula:
Adding refrigerant amount (kg) = Adding refrigerant amount per meter of liquid pipe (kg/m) × Total length
of extended liquid pipe (m).
• The air in the hose connected to the composite pressure gauge is vacuumed.
• If the pipe length exceed 10 m, then refrigerant cylinder is kept up-side-down (depending on the size of the
cylinder, consult Vertiv local representative for details) during the charging of the refrigerant to ensure that
the refrigerant is charged into the refrigeration system in a liquid state.
• After the mechanical installation, electrical installation, and pre-commissioning inspection of the unit is
completed, the unit is turned on and the unit system is charged with liquid refrigerant.
• For your personal health, please wear earmus or earplugs and other equipment to protect your hearing
after entering the computer room.
• Observe the compressor suction line to ensure that the piping and compressor housing are free of
condensation to eliminate potential liquid impact hazards.
• On successful charging of gas, suction superheat will be 10 K and condenser sub-cooling is 5 K.
The adding refrigerant amount per meter of liquid pipe is given as
Total length of extended liquid pipe (m) = Total length of liquid pipe - 10 m
The amount of refrigerant required for SRC03GES is 50 g/m per meter length of pipe, for SRC07GES &
SRC07GET is 55 g/m per meter length of pipe and SRC11GET 60 g/m.
2.10.3. Long Connecting Pipe System with Lubricant Oil
The charging of refrigerant can dilute the lubricant oil in the system and aects the lubricating & cooling
properties of the lubricant oil. Therefore, the lubricant oil should be added in the beginning. The lubricant oil used
in the Liebert® SRC-G units for SRC03GES is HAF68D1C, and for SRC07GES, SRC07GET and SRC11GET
is POE RL 32-3MAF:
The adding lubricant oil amount for the liquid piping length more than 10 m.
Amount of additional lubricant oil (ml) = Adding refrigerant amount (kg) x 22.6

Vertiv Liebert SRC-G Series Specifications

General

Brand	Vertiv
Model	Liebert SRC-G Series
Category	Air Conditioner
Language	English