What is the correct procedure for removing a gauge manifold which is conected to a receiver service valve and a suction service valve that would pass 2079....
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What is the correct procedure for removing a gauge manifold which is conected to a receiver service valve and a suction service valve that would pass 2079....
close your receiver service valve, leaving the suction service valve open. then open the suction and discharge manifolds on the gauges obviously opening the discharge slowly flashing the gas from you discharge side of the gauges into the suction.
you will see the discharge pressure on the manifold drop until it equalizes with the suction pressure.
close the discharge manifold and the suction manifold once this is acheived and then close the suction service valve.
remove the manifold gauges, once gauges removed test the service valves with leak spray remembering to check the spindles aswell.
once the discharge pressure equalizes with the suction pressure i always just leave for 1 min anyway just to ensure all liquid has been removed from the manifold gauges.
With the unit running, back seat the receiver rotalock valve to isolate the gauge line. Now put the unit into pump down via the LL sol valve and allow the trapped refrigerant in the gauge lines to be drawn into the suction port. With the unit pumped down, your gauge lines should be near empty and can then be disconnected.
Don't forget to wear your PPE
Thanks for the quick reply...
I turned into a jibbering idiot doing the practical. I almost forgot my own name...........
where did you do it?
If we take exams for F-gas, the candidate must be able to do this without using the LL Sol Valve and hoses must be at 0 bar when removing those.Quote:
Originally Posted by frank
In the Uk Peter you have to demonstrate you can remove the gaugesQuote:
Originally Posted by Peter_1
in a safe and competant manner.
If the system is fitted with a pump down solenoid it is acceptable
to use that to remove the gauges.
But if the system does not then other ways are required.
It is up to the engineer to safely decide which method he uses
and that will depend on what type of equipment he is using.
The descision is down to the engineer and he has to prove knowledge
and competance.
All the best
taz
.
Taz, there's a SV on our systems but they may not use it this because this is then to easy.
The fact they may not use the SV and only the service valves is for many technicians a real nightmare to remove their hoses. They may use ball valves on the hoses.
.
Fitting gauges and then removing them should be easy but
so many people struggle to do this in a safe manner without
loosing the refrigerant from the lines.
It does not help when people are shown only one piece of equipment,
a good engineer (a competant engineer) should be able to walk up to
any system and fit a set of gauges. It should not matter if it is a fridge,
freezer, air conditioner, single stage or two stage system the engineer
should be able to fit gauges.
All the best
cool runnings
.
quik couplers- once there is gas in ur lines then when u connect and disconnect you only lose a sniff of gas-quickest and safest way for splits ,vrv's that don't have service valves or transducers to display pressures
I'll go with cool runnings - a good 'engineer' should be able to attend any system to install and remove gauges within the confines of the regs.
Most of our work is on splits, and on systems that only have schraeder valves. The splits are ok - front seat the liquid line valve and remove the gauge line as the pressure drops to just about 5psig. All others mean losing whatever is the line.
I always keep my gauge lines attached to the manifold, with refrigerant in, to keep them clean. I was taught this in about 1970, and it still holds good today!