GREAT PLAINS QM240 Manual del usuario - Página 3

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INSTALLATION

Before installing your meter, review

the safety instructions given above�

Examine your meter to make sure

there are no visible signs of shipment

damage� Plan your meter installation

by reviewing the following procedures�

Your system must be mounted on a

vented tank� If the tank is unvented,

your local dealer or distributor can

supply a pressure cap�

If the meter is located in a rigid piping

system where the fluid is trapped

(for example, by gravity, valves or

nozzles) thermal expansion of the fluid

can create pressure spikes that can

damage a meter� Install a thermal relief

valve or otherwise allow for thermal

expansion of the fluid�

The flowmeter MUST be mounted so

that the rotor shafts are in a horizontal

plane� Mounting the meter with the

mechanical display facing horizontally

will orient the rotor shafts correctly�

The mechanical display should never

face upwards or toward the ground�

The weight of the rotors must be

supported by the horizontal rotor shafts�

If installed incorrectly, performance,

life or accuracy could be affected�

(see Figure 1)

Horizontal Flow

figure 1

Liquid can flow in a horizontal direction,

or a vertical direction, but in each case

the rotor shafts must be in a horizontal

plane�

It is preferred to install the flow-meter

upstream of a flow control or shut-off

valve, as the back pressure provided

by the valve will be beneficial to system

accuracy� The flow meter should

remain full of liquid at all times when

connected�

Do not operate the flow-meter directly

discharging to the atmosphere�

Prior to installation, determine whether

horizontal or vertical flow is required�

For vertical flow installations the liquid

should travel from bottom to top, i�e�

it should rise vertically through the

flow-meter� This will ensure that the

flow-meter remains full of liquid, and

will prevent air entrapment in the meter�

The back of the meter housing is

embossed with "INLET" and "OUTLET"

adjacent to its respective port to assist

in correct piping connections�

Correct

InCorrect

Correct

Vertical Flow