Flomec GPRO QM Series, Руководство пользователя

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3
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
)
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 dir ectly
discharging to the atmosphere �
Prior to installation, determine whether
horizontal or vertical flow is r equired �
For vertical flow installations the liquid
should travel from bottom to top, i � e �
it should rise vertically through the
fl ow-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 �
figure 1
Correct
Horizontal Flow
Vertical Flow
InCorrect
Correct