EMECS Quarterly Preventative Maintenance Report
This procedure outlines the steps for conducting quarterly preventative maintenance on the EMECS asset, including inspection, cleaning, and finalization actions.
Envent Corporation
11/06/2025
EMECS Quarterly Preventative Maintenance Report
This procedure outlines the steps for conducting quarterly preventative maintenance on the EMECS asset, including inspection, cleaning, and finalization actions.
EMECS Quarterly PM
Date
Inspectors
Unit #
License Plate #
Unit Hours Start
Air Compressor Hours Start
Gas Meter Start
No Power on Unit
Trailer
Inspect leg stands and grease all Zerk fittings. Check firebox to trailer bolts and holes for integrity. Ensure BIT inspection (California only), Annual inspection and Registration ate up to date, communicate to the mechanic and shop supervisor if due.
Bonding and Grounding
Check all bonding and grounding cables for good wire, proper clamps, and connections. Each unit should have at least one ground and two bonding spools. With an Ohms meter, check continuity; the reading should be less than 5
Fire Extinguishers
Verify that the two fire extinguishers on the unit are ready to use, not damaged, the seal is intact, the UL tag is in place, and they are up to date on their annual inspection. Replace if needed.
Air Compressor (42-5 Only)
If equipped, check air compressor oil, change if necessary, drain tank of any condensation liquid, check belts and tighten or replace if needed, and set regulator between 80-90 psig.
Vapor Blower (Process Blower)
Remove blower belt cover and check the integrity bearings and belt. Ensure belt tension is 75 Hz for RB 4000 & 4002, per manual. Re-tension it or replace if needed. Grease vapor blower motor through zerk fittings.(Only use polyrex Em grease)
Combustion Blower
Remove bearings cover, look for worn parts. Grease any zerk fittings in the motor and bearings if applicable. (Use only polyrex Em grease). Ensure wires are well connected on the motor.
Capsuhelics & Magnehelics
Zero all Capsuhelics and Magnehelics, replace if necessary
Flow Tubes (DS-300, DS-400)
Remove all DS-300/400 pitot tubes and blow out with shop air, inspect and reinsert or replace if needed.
Vapor Blower (Process Blower) / Combustion Blower
Remove electrical motor cover, inspect wire terminations. Repair or replace connectors if needed.
Ignitor/Ignition Transformer
Pull out and clean the two igniters, verify no corrosion on the on the tip. Replace if necessary.
UV Scanner
Rotary Gas Meter
Check Pressure gauges and read out gauges, verify that numbers are readable. Verify when valve is closed and gauge removed that pressure goes to 0. Replace if bad.
Fuel Train (Enrichment Line)
Open "Y" strainer to check for propane butter. Note: Release pressure first.
Pressure Indicators (Gauges)
Ensure all PIs work, verify that the numbers are readable. replace if needed.
Firebox
Inspect fire box sight glass windows and clean if dirty (separate from nipple not by opening the union/glass nut)
Verify that all the sample points are functional.
8" Manual Valve
Check functionality of the valve by moving it to fully open and then to the close position. Verify that the indicator moves to the right position.
8" Manual Valve
Check functionality of the valve by moving it to fully open and then to the close position. Verify that the indicator moves to the right position.
Expansion Joints
Inspect all expansion joints for proper alignment and integrity, ensure not dry rotting. Torke fasteners to 40 ft-lb
Vaporizer
Check all wiring in vaporizer and make sure connections are secure (recrimp connections if necessary). Check controller.
Inspect Level indicator integrity, remove wire cover, look for and address signs of rust or water.
Pressure Relieve Valve, Inspect it and replace if it is damage or has not been change in 5 years or more (by manufacture)
Open inlet "Y" strainer to check for propane butter. Note: Ensure no pressure present before taking fittings apart.
Remove top cover hold by 6 screws, to inspect refractory and doughnut gasket. Ensure doughnut gasket is still in its place and not obstructing the space around tank.
Conduit
Inspect all conduit and conduit covers for signs of leaks or exposed wires.
Panels
Open each panel and tighten every wire termination, remove the BMS and check terminations. Remember, there are multiple panels. Check for open holes in each panel, look for and address signs of rust or water, ensure each panel is dry and water tight. Add Dessicant packs to panel if missing or replace if saturated.
Inspect the condition of every wire, ensure no wire is rubbing agains sharp edges, if so, ask an engineer for help. Ensure spiral wire wrap is placed correclty to protect wires. Ensure the wire tie downs are operational, replace if necessary.
Chart Recorder
Did all Chart Recorder Checks Pass or Fail?
if the answer is "oneOf [FAIL]"
Explain the Failure or Issue
Power on Unit and Connected to Propane
Process Blower
Check motor rotation and observe/ listen for abnormal sounds or vibrations.
Combustion Blower
Check motor rotation and observe/ listen for abnormal sounds or vibrations.
Air Compressor (42-5 Only)
If equipped, turn on compressor, check rotation and observe/listen for abnormal sounds or vibration, check for leaks, and verify units stops at ~135psi (main tank)
Chart Recorder
Verify the display powers up with no error codes or flashing.
Install chart paper and verify proper time and date stamp, and legible temperature recordings.
Compare temperature reading with UDC controller readout and verify they are within 50F of each other.
Panel Light Check
Check all buttons and switches as they are turned on to insure that the switch or button is lit when turned on.
Area Lights
Ensure all area light work, replace lightbulb if needed, look for and address signs of rust or water.
Vaporizer
Start vaporizer, ensure all burner ring lit
Ensure burner ring turns off when vaporizer gets to 120 F of temperature.
When unit running, Soap test all vaporizer and fuel train fittings.
SURE 25 Valve
Ensure valve strokes properly and all positions indicators function correctly when injecting propane to burner
SURE 100 Valve
Ensure valve strokes properly and all positions indicators function correctly when unit is above 400 deg F
SURE 150 Valve
Ensure valve strokes properly and all positions indicators function correctly when unit is above 400 deg F
Fuel Train (Enrichment Line)
Leak test all fuel train connections and address problem at the moment.
Rotary Gas Meter
Drain oil on three chambers and refill (Left, Center and Right). Check and replace inlet screened gasket if necessary.
Interlock Testing
Check all Interlocks on unit
Inlet DA, High Temp Switch
Remove Temperature Switch, heat probe with heat gun and with ohms meter check continuity on common and Normally Close stops when switch reaches 200 degF.
Outlet DA, High Temp Switch
Remove Temperature Switch, heat probe with heat gun and with ohms meter check continuity on common and Normally Close stops when switch reaches 200 degF.
Inlet FA, High Temperature Switch
Remove Temperature Switch, heat probe with heat gun and with ohms meter check continuity on common and Normally Close stops when switch reaches 200 degF.
Outlet FA, High Temperature Switch
Remove Temperature Switch, heat probe with heat gun and with ohms meter check continuity on common and Normally Close stops when switch reaches 200 degF.
Vapor Blower Failure
With the unit running and the process inlet closed, turn the vapor blower Hand/Off/Auto switch to the "Off" position on the back panel. Ensure unit shuts down.
Combustion/Quench Air Blower Failure
With the unit running and the process inlet closed, turn the Combustion/Quench blower Hand/Off/Auto switch to the "Off" position on the back panel. Ensure unit shuts down.
Low Supply Gas Pressure
Close the main valve to the vaporizer and burn out line. If equipped with hand pump testing port, isolate the switch from the fuel train and release pressure from line or use a hand vacuum pump to ensure switch turn the unit down.
High Supply Gas Pressure
With unit running, increase the regulator upstream above the set point of the high gas pressure sensor and ensure unit shuts down. If equipped, with hand pump testing port, isolate the switch from the fuel train and use the hand pump port to test the switch to ensure it shuts the unit down.
Low Pilot Gas Pressure
With unit running and process inlet closed, shut pilot line fuel valve. Ensure unit shuts down.
Pilot #1, Pilot #2 Failure. (UV Scanner Shutdown)
With the unit running and the process inlet valve closed, unscrew and remove UV Scanner from pilot flame sight line, do not expose to direct sunlight. Ensure unit Shuts down.
Low Combustion/Quench Air pressure Shutdown
With the unit running and process inlet valve closed, disconnect the tubing connected to the pressure switch. Ensure unit shuts down.
Process High Pressure Shutdown
Isolate pressure switch by shutting valve connected to process line, use a hand pump to pressurize the switch to 10 psig. Ensure unit shuts down.
Combustor High Temperature
With the unit running and the process inlet closed reset the High temperature reset the high temperature alarm set point to 300 degF. Ensure unit shuts down.
Combustor Low Temperature
With the unit running and process inlet closed, set the low setpoint above the test fire temperature. Ensure process valve closes.
Low Differential Pressure, FA Shutdown.
With the unit running and the process inlet open, disconnect the tubing on the inlet side of the FA. Ensure the unit shuts down.
Flame Arrestor
Check the Flame Arrestor for clogging, remove and clean it if differential across inlet and outlet gauges is greater than 5 wc.
Detonation Arrestor
While the unit is at temperature (both manual and actuated valves are open) check the differential pressure across the DA, remove and clean it if differential is greater than 15 wc. Test drains for plugging (open valve and verify suction while the blower is on)
Flow Gauges
Test all flow sensors and verify proper readings based on increasing and decreasing process and total flows. Replace if needed.
Firebox
Analyze entire exterior firebox wall with temperature gun and notate any part of the wall that exceeds 200°F
Spare Parts
Verify Spare Parts are in Job Box
if the answer is "empty "
If spare is not stocked due to inventory, let a Maintenance Tech at the Yard know what needs to be ordered and then list below what this unit does not have.
End Hours
Unit End Hours
Meter name
Unit
Air Compressor End hours
Gas Meter End
Technician Closure Signature
Technician Sign Off
Supervisor Closure Approval Signature
Supervisor Sign Off
Click here to sign
Source: Envent Corporation (Community Member)