55
IMPORTANT:
Opening the flowmeter will void the Flow
Calibration value assigned to your unit. However, you may
need to take the flowmeter apart for periodic cleaning or to
remove an obstruction.
See illustration below for flowmeter
reassembly instructions.
TO OPEN THE FLOWMETER
Disconnect the hose from servo valve to manifold. Loosen
the union hex closest to the heat exchanger. Remove the
two “U” bolts that hold the servo/flowmeter assembly to the
brackets. Unscrew the union from the heat exchanger and
remove the servo/flowmeter assembly.
Use running water to rinse the assembly of any accumulated
dirt. Remove the three flowmeter bolts, carefully open the
flowmeter and remove the turbine. Thoroughly clean turbine
and housings of any foreign material
(dirt, pieces of teflon
tape, rust on magnets, etc.).
Set and spin the turbine in each flowmeter housing half. It
should spin freely. If not, remove the turbine, wipe the shaft
and try again.
TO ASSEMBLE THE FLOWMETER
Place the servo, flowmeter end up, in a vice or other suitable
fixture. Set turbine in non-sensor housing. Properly position
gasket on housing.
(Gasket may be reused a few times but
will eventually need to be replaced.)
Pipe thread compound
is not absolutely necessary but will insure a good seal. Be
careful not to get compound inside flowmeter or turbine
will stall. Carefully put other flowmeter housing (sensor half)
in place.
(Position the housing so that the two square lugs
are lined up with each other.)
Drop all three bolts into holes.
Hold lock washers in place and finger tighten all three nuts.
Nuts should be torqued to 120 in./lb. (13.56 nw/m). Attach
tag by running wire between a bolt and the housings, and
twisting.
After assembly, shaking flowmeter end-to-end should
produce a “rattling” sound
(shaft end play).
Blowing into
the meter from either end should cause the turbine to spin
freely. If the turbine only spins from one direction, install the
flowmeter so that the liquid flows in that direction.
Start with original calibration number and follow procedure
in manual for verifying flowmeter accuracy.
Housing FM 750 N with Sensor
Receptacle, Including Bearing
P/N 10145
Housing, Includes
P/N 10116
Turbine
P/N 14836
Teflon Gasket
P/N 10137
Complete assembly
FM750 N Flowmeter
P/N 10899
WARNING
TO PREVENT SERIOUS INJURY, DO THE FOLLOWING:
1.
ALWAYS
WEAR
gloves, goggles, and other
necessary equipment when handling NH3
apparatus.
2.
DO NOT cross thread. Use anti-seize lead base
thread compound.
3.
THOROUGHLY
BLEED
hoses before disconnecting
NH3 apparatus.
4.
COMPLETELY
EVACUATE
NH3 apparatus before
servicing.
Appendix F
(cont.)
SprayMate
TM
II NH3 Specific
Flowmeter Assembly (FM-750 N)
Summary of Contents for 14869
Page 1: ...1 SprayMate II AUTOMATIC RATE CONTROLLER REFERENCE M A N U A L TM 1 1 1 1 1 1 1 1 1 1 1 1 1...
Page 7: ...7 SprayMateTM II System Overview P N 21778 P N 21963...
Page 8: ...8 P N 21963 P N 21779 P N 14313 P N 14316 SprayMateTM II Wiring Diagram...
Page 37: ...37 Appendices...
Page 45: ...45 P N 21779 P N 21778 Appendix F SprayMateTM II NH3 Specific Wiring Harness Diagram...
