How to drain and discharge Ammoni/water chiller

[Charon]

I'm operating a 5 ton Robur ammonia/water absorption chiller and i need to do a routine maintenace of the system. The manaul states that i would need to use amonia R 717 7.5 kg and Water H2O 10 kg but it just doesnt quite tell me how to charge them up to the system. Also when I open the outlet valve, which is used to intall a pressure gauge, to drain the Ammonia/water, how would i get rid of all the water that still remains inside ie, rectifier absorber and so on. If anyone is experienced in this field please kindly educate me, thanks

[Brian_UK]

You don't normally need to remove the mixture from the unit.

For example, I once had to remove the evaporator coil which meant cutting the pipework.

All I had to do was de-pressurize the system by venting the vapour under water. The pipes were then cut, the work completed and the pipes reconnected using the specified connectors.

The system was re-pressurized using a pre-mix bottle and the operating pressures restored with the unit running.

You should check with the instruction manual first however.