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THERMOSTATIC MIXING VALVE
Thermostatic Mixing Valve (TMV) Inspection –
This device has no user-serviceable or repairable
components. If it fails to maintain adequate compressor discharge temperature, replace it as follows:
Figure 9- 5 – Thermal Mixing Valve
1.
Be sure the unit is completely off and that no air pressure is in the oil reservoir and in the air cooled
after cooler. Close the service valve.
2.
Disconnect lockout and tagout the power supply to the starter.
3.
Unscrew the two bolts securing the TMV assembly cover to the body of the compressor. Remove
the cover, its gasket, the TMV body and its spring from the compressor housing.
4.
Inspect the valve seat surfaces for damage or foreign matter. Note its setting temperature
– it is
stamped on the valve seat area and will read
“55ºC” or “70ºC”.
5.
Immerse the valve body in a bath of compressor oil; heat the oil slowly and observe if the seat starts
extending about 5ºC below its setting and reaches full stroke at the stamped setting. Replace the
device if one of the following conditions is present:
a. The stamped setting on the valve seat is not correct. The Fixed Speed compressor package
should be fitted with the 55ºC TMV, unless by consultation with Gardner Denver, it has been
approved to use the 70ºC element instead.
b. The seat fails to stroke fully at the correct temperature.
6.
Assemble the TMV assembly into the housing in the reverse order.
7.
Run the unit and check for leaks.
INPUT SHAFT SEAL ASSEMBLY
Input Shaft Seal Maintenance –
This device has no user-serviceable or repairable components. If oil
leaks past its seal and unto the external portion of the shaft, contact Gardner Denver to have it inspected
and/or repaired by a trained mechanic.
Summary of Contents for APEX15-18A
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Page 37: ...13 25 607 Page 35 Figure 4 10 PIPING AND INSTRUMENTATION ILLUSTRATION 301UCC797 F Ref Drawing...
Page 60: ...13 25 607 Page 58 Figure 9 6 Compressor Module Hardware 308UCC810 C Ref Drawing Page 1 of 1...
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