Resetting the regulator after lockout
How to reset the regulator
Some LPG bulk tank systems are fitted with low and/or high pressure lockout devices usually as an integral part of one of the regulators (typically domestic central heating systems and small domestric/industrial systems). These devices are also called UPSO or OPSO devices. These typically lock out if the tank is allowed to go empty or if they detect a fault on the system (the gas pressure in the pipework going above or below a preset limit). This section describes the different types in use by Flogas and how to reset them. Note they will NOT reset if there is still a problem, and NEVER try to disable them as you will undoubtedly be leaving your installation in a dangerous condition.
Schulz & Rackow Low and High Pressure Cut-Off Regulator
While some are yellow, as shown in this picture, most are blue. They are usually located on the LPG tank. The smaller top unit in the picture is the high-pressure cut-out, the larger lower one is the low-pressure cut-out. The transparent plastic caps (on the right of the regulators, see see next photo also) should only black inside the caps. If you see a red indicator inside the caps, then that unit has tripped out.
To reset the unit, unscrew the transparent plastic cap, and pull the shaft outwards - you will hear the gas flowing through, and hold it out for a couple of seconds until the gas re-pressurises the downstream pipework. Replace the transparent cap. If it has reset properly, you won't see the red marker anymore.
Sclumberger Automatic Cut-Off Regulator
This is grey or silver, and typically located at the LPG tank or, less frequently, on the outside of the building where the gas supply enters the house.
To reset it, first unscrew the plug at the bottom of the regulator. This may be stiff, and a pliers or vice-grips may be needed. Note the the shaft protruding from the bottom of the plug - this is threaded at the end. Apart from being a sealing plug, this is the tool used to reset the device.
Now turn the plug upside-down and screw it onto the shaft in the regulator (it does not have to be tight) as shown. Gently pull it down, you should hear the gas going through the regulator as it fills up the pipework with gas. When the flow stops, let it go, unscrew the plug, and put it back on the way it was originally.
Jeavons / Cavagna Automatic Cut-Off Regulator
This design was made by Jeavons, Cavagna, and some others. It is invariably either grey or green. It is typically located at the LPG tank or, less frequently, on the outside of the building where the gas supply enters the house. It has two separate reset mechanisms, (a) one for locking out due to too low a pressure, highlighted in the left red circle, and (b) one for too high a pressure, in the right-hand red circle. It is very unlikely that the high-pressure lockout will have tripped.
For the low pressure lockout, unscrew the cap (in the left-hand circle on the previous picture) revealing the plunger shown on the left. Gently pull the plunger out, you should hear the gas going through the regulator as it fills up the pipework with gas. When the flow stops, let it go, and replace the cap.
For the high pressure lockout (again it is very unlikely that this will have tripped and it usually indicates a more serious problem), unscrew the cap (in the right-hand circle on the picture at the beginning of this section).
Depending on the model, either (a) the cap comes off easily to reveal a plunger similar to the low-pressure lockout or (b) as shown on the left,
the cap unscrews but stays affixed to the plunger. In either case, gently pull the plunger or cap out, you should hear the gas going through the regulator as it fills up the pipework with gas. When the flow stops, let it go, and replace the cap.
Clesse Automatic Cut-Off Regulator (Type 3427)
This is a golden colour, and typically located at the LPG tank or on the outside of the building where the gas supply enters the house. To reset it, simply turn the knob in the direction of the arrow, hold it in that position until you hear the flow of gas stopping, then gently release it.
Clesse Automatic Cut-Off Valve
This shut off is usually fiited indoors beside a cooker or hob that is on a bulk tank supply. It does not incorporate a regulator. The picture shows it in the ON position. To reset it, turn the large knob a quarter-turn to the off position and then slowly turn it back on again. It can also be used as an on/off valve.
Francel B Series Type B6
This is grey or silver, and typically located at the LPG tank or, less frequently, on the outside of the building where the gas supply enters the house. To reset it, push the white lever down until gas can be heard passing through. Be sure not to push the lever the whole way down or it will cut out the system. Hold down the lever until the system has been repressurised and release.
Mesura B6 10
This is grey or silver, and typically located at the LPG tank or, less frequently, on the outside of the building where the gas supply enters the house. It has two separate reset mechanisms, (a) one for locking out due to too low a pressure which is the section with the green tipped lever and (b) one for too high a pressure which is under the red cap . It is very unlikely that the high-pressure lockout will have tripped.
For the low pressure lockout, push the lever, you should hear the gas going through the regulator as it fills up the pipework with gas. When the flow stops, let it go. Lever should remain in the down position.
To reset the high pressure lock out (again it is very unlikely that this will have tripped and it usually indicates a more serious problem) unscrew the red cap and pull the plunger out until gas can be heard passing through downstream. Once the system has repressurised release the plunger and replace the cap.