AERCO Electronic Control Valve - Manual (Page 19)

VA-115 INSTRUCTIONS – ELECTRONIC CONTROL VALVE, CXT-E
6-1
6 - ROUTINE MAINTENANCE
INTRODUCTION
The following paragraphs provide the AERCO recommended routine maintenance procedures for the
Electronic Control Valve Type CXT-E and the Electronic Control System (ECS).
CXT-E CONTROL VALVE ROUTINE MAINTENANCE
MONTHLY
Once each month, check the Control Valve for leakage as follows:
1. Refer to Figure 6-1 and check the Packing Nut and Valve Top for evidence of leakage.
2. If there is leakage between the Packing Nut and Valve Top, tighten the Packing Nut until the leakage
stops. DO NOT FORCE the Packing Nut.
3. If tightening the Packing Nut does not stop the leak, the Packing Nut and Packing Assembly must be
replace in accordance with the procedures specified in the Control Valve CORRECTIVE
MAINTENANCE Section.
Figure 6-1. Valve Shaft Seals
SEMI-ANNUALLY
Every six months, check the following items:
1. Refer to Section 3 - ADJUSTMENT and perform the Actuator adjustment procedure specified. Verify
that the Actuator strokes the Control Valve from the fully closed to the fully open position.
2. Clean the Strainer in the heating fluid line (Figure 2-1 or Figure 2-2) in accordance with the
instructions furnished with the Strainer.