EMTOS Annual Preventative Maintenance Report
This report provides a structured record of the annual preventative maintenance performed on EMTOS equipment. Complete all applicable sections to document inspection findings, servicing activities, and operational check results in accordance with manufacturer recommendations and site procedures. Record any defects and required follow-up actions to support safe, reliable operation and future maintenance planning.
Envent Corporation
10/20/2026
EMTOS Annual Preventative Maintenance Report
The EMTOS Annual Preventative Maintenance Report documents the yearly inspection, servicing, and operational checks performed on EMTOS equipment. It records equipment condition, maintenance completed, identified defects, and recommended corrective actions to support reliable operation, reduce unexpected downtime, and maintain a complete service history.
EMTOS Annual PM
Unit #
Date
License Plate #
Inspectors
The annual preventative maintenance shall be conducted following an Anuual PM to ensure all equipment is fully inspected, cleaned, and functioning correctly. Inspectors should verify critical components, check for wear or damage, lubricate moving parts, and document any findings for follow-up actions.
Unit Hours Start
Meter name
Unit
Air Compressor Hours Start
Gas Meter Start
Is the car seal installed and intact on the main panel, with no signs of tampering or unauthorized entry?
if the answer is "noneOf [PASS]"
Check that the SO cord is connected and snug inside of the panel before energizing power to the unit.
Check for any loose wires or disconnected wires. Reinstall and tighten to spec.
No Power on Unit-Generator is Disconnected
Inspect Trailer Kingpin
Check for visible cracks, deep gouges, or severe condition
Inspect Trailer Kingpin
if the answer is "oneOf [FAIL]"
Inspect upper coupler plate for warping, bowing, or thin spots.
if the answer is "oneOf [FAIL]"
Inspect welds connecting kingpin to trailer for signs of weld failure or cracking.
if the answer is "oneOf [FAIL]"
Upload photo of kingpin upon completion of passed inspection.
Add or drag pictures
Inspect trailer tires and lights
Check tires for proper inflation and dry rotting or damage.
Inspect all lights for proper operation (running lights, turn signals, brake lights).
Pull break away wire and verify the trailer breaks work by driving truck forward.
Inspect trailer support
Inspect leg stands and grease all Zerk fittings.
Check firebox to trailer bolts and holes for integrity.
Vaporizer
Mechanical Inspection (No Power or Propane Required)
Open and clean Y-strainer. Inspect for propane butter, rust, or debris.
Inspect power cord for damaged insulation and replace if necessary.
Inspect igniter wiring and tighten electrical connections.
Remove and clean burner ring and burner tips with compressed air. Replace damaged tips.
Inspect thermal generator (relighter) for corrosion. Clean or replace as needed.
Inspect door, hinges, latches, and locks. Repair or replace as needed.
Inspect safety relief valve for damage, corrosion, or obstruction. Replace at 5-year intervals or sooner if damaged.
Cycle all ball valves fully open/closed and verify locking handles are present. Replace defective valves.
Inspect Acme fittings and camlocks for wear, cracks, or damaged seals. Replace as necessary.
Remove vent cap and inspect insulation around vaporizer tube. Report deterioration.
Remove top cover and inspect refractory and doughnut gasket condition. Verify proper positioning.
Clean exterior, tighten clamps, touch up paint, and inspect overall condition.
Check vaporizer thermocouple and make sure connections are secure (recrimp if necessary)
Check controller to ensure the knob can be fully turned into all positions.
RH80 Specific Checks
Replace the following components if necessary
Main Electrical Panel
Tighten every wire termination to 1.2 Nm torque
Remove BMS and check terminations.
Check for open holes in each panel.
Signs of rust or water.
Inspect panel door gasket & conduit opening integrity.
Replace or add desiccant pads.
Inspect wire condition (no wire rubbing against sharp edges)
Ensure spiral wire wrap is placed correctly to protect wires.
Ensure wire tiedowns are operational, replace if necessary.
Ignitor Electrical Panel
Tighten every wire termination to 1.2 Nm torque
Check for open holes in each panel.
Signs of rust or water.
Inspect panel door gasket & conduit opening integrity.
Add dessicant packs if missing or replace if saturated.
Inspect wire condition (no wire rubbing against sharp edges)
Ensure spiral wire wrap is placed correctly to protect wires.
Ensure wire tiedowns are operational, replace if necessary.
Auxiliary Electrical Panel
Tighten every wire termination to 1.2 Nm torque
Signs of rust or water.
Inspect panel door gasket & conduit opening integrity.
Add desiccant packs if missing or replace if saturated.
Inspect wire condition (no wire rubbing against sharp edges)
Ensure spiral wire wrap is placed correctly to protect wires.
Ensure wire tiedowns are operational, replace if necessary.
Chart Recorder
Verify plug connections and wires are tight for power, thermocouple input 1 & 2, alarm outputs, output control and ground terminals. Visually verify all ribbon cables are landed securely. Verify input cards are seated correctly and free of corrosion or damage.
Replace Chart Recorder battery.
Rotary Gas Meter
Drain oil in all three chambers and refill (left, right, and center).
Inspect and replace screen paper gasket on the inlet side and regular paper gasket on the outlet side.
California Only: Remove gas meter and send it to be calibrated and certified.
Flow Tubes
Remove all DS-300/400 flow elements and blow out with shop air, inspect and reinsert or replace.
Firebox
Inspect fire box sight glass windows and clean if dirty (separate from nipple not by opening the union/glass nut)
Remove manway door and inspect refractory on floor, roof, walls, process inlet, and burner.
Verify that the stack and fire box inlet sample points are functional.
Burner
Verify burner cone integrity. Observe air gap on burner by removing burner. There should be at least ~1cm air gap around burner housing and cone. Burner should be replaced every ten years.
Pull the burner and take pictures of the cone and the internals.
Add or drag pictures
Inspect burner damper and linkage assembly (wiggle linkage).
Inspect burner refractory discharge sleeve, check for cracks or broken studs.
Clean burner site glasses.
Combustion Blower: Visually inspect all blower mounting bolts for rust and tightness.
Replace burner gasket and reinstall burner.
Manual Butterfly Valves
4" Process Valve: Open gear assembly and grease gears.
Main Process Valve: Open gear assembly and grease gears.
Dilution Valve: Open gear assembly and grease gears.
Automatic Process Isolation Valve
Visually inspect mounting hardware and support brackets for signs of stress or wear.
Blowers & Compressors Motor terminals
Remove electrical motor cover, inspect wire terminations. Replace connectors if needed. Connectors should be industrial grade.
Verify Motor Terminal gasket integrity.
Igniter/Ignition Transformer
Clean igniter, verify no corrosion on the connection point to transformers or to the igniter. Mark igniter position before removing. Replace if necessary.
Maxon or Eclipse Valves (SSOV 1& 2)
Open side panels, inspect gasket, check for water intrusion.
Check wire terminations.
Add oil if applicable.
High Temp. Thermocouple
Replace High Tempertaure Thermocouple. Be sure to document Calibration before install.
Combustion Thermocouple
Replace Combustion Thermocouple.
Process Blower
NYB Blower Alignment Checks
This procedure outlines the steps for performing quarterly alignment checks on NYB Blowers, ensuring all components are properly aligned and the area is safe and clean post-inspection.
Pre-Inspection Setup
Alignment Inspection
Measure Blower Housing Centering at Pillow Blocks
Using a tape measure, measure the distance from the outside edge of each pillow block bearing housing to the edge of the blower housing at all four measurement points (top, bottom, left, and right, or as applicable to the equipment configuration). Record each measurement and compare the values to verify the blower rotor and shaft assembly are centered within the housing.
When taking measurements:
if the answer is "oneOf [Record all measurements to the nearest 1/16 inch (or applicable site standard).]"
Record Measurements:
Is the alignment within the acceptable range?
Post-Inspection Tasks
Reinstall the Shaft cover.
Was the area cleaned after inspection?
NYB Blower Bearing Lubrication
This procedure outlines the steps for purging the bearings of an NYB blower, including inspection, cleaning, lubrication, and testing.
Preparation
Inspection and Cleaning
Inspect bearings and bushing
Lubrication
Remove the tubing from the grease injection points on each bearing to allow direct access to the grease fittings and to verify that grease can flow freely into the bearing. Inspect the tubing, fittings, and connectors for restrictions, hardened grease, contamination, damage, or blockages that could prevent proper lubrication.
if the answer is "noneOf [PASS]"
If any tubing is damaged, kinked, or plugged, replace it before returning the system to service.
This ensures hardened, contaminated, incompatible, or degraded grease is removed from the lubrication path and that the tubing is completely charged with fresh grease.
Visually inspect the discharged grease for signs of contamination, moisture, dirt, discoloration, or metal particles that could indicate lubrication or bearing issues.
Greasing a stationary bearing can rapidly build internal pressure, forcing grease against the seals and potentially causing seal damage or seal blowout. Excessive pressure can also lead to overheating, premature bearing failure, and reduced lubricant effectiveness. If shaft rotation cannot be achieved, stop the lubrication activity and consult maintenance supervision before proceeding
This also helps prevent contamination from being drawn back into the bearing.
The appearance of fresh grease confirms that old grease has been displaced and the bearing cavity has been replenished.
Vapor Seal Lubrication
The vapor seal lubrication point and the bearing grease fitting are separate components. Do not introduce anti-seize into the bearing grease fittings, grease lines, or bearing housing. Anti-seize contamination will damage the bearing lubricant, accelerate wear, and can lead to premature bearing failure. Bearings shall only be lubricated with Mobilgrease XHP 222 (Blue) grease.
The vapor seal is located between the bearing housing and the blower casing where the shaft enters the the housing. Its purpose is to prevent process vapors from migrating along the shaft and reaching the bearing assembly. The fitting closest to the fan housing is typically the vapor seal lubrication point. The fitting located on the bearing housing is the bearing grease fitting. Always verify fitting locations before adding any lubricant. Verify the correct lubrication point before applying lubricant.
Shaft Cover Install
Prior to reattaching the blower cover, inspect all mating surfaces, gaskets, O-rings, and sealing areas for damage, debris, corrosion, or residual gasket material. Clean the sealing surfaces as necessary to ensure a proper seal and prevent air leakage. Replace any damaged gaskets, O-rings, or sealing components before reassembly. Carefully position the blower cover onto the housing, ensuring it is properly aligned with the locating features and does not contact the rotor, shaft, or internal components during installation. Install all mounting hardware finger-tight initially to ensure the cover seats evenly against the housing. Tighten mounting bolts in a crisscross or star pattern to evenly distribute clamping force and prevent cover distortion. Torque all fasteners to the manufacturer's specification where applicable. Verify that no tools, rags, hardware, or foreign material remain inside the blower housing prior to fully securing the cover.
After the cover is installed:
Testing
Turn on the blower, let it run for 15 minutes, and take temperature of bearings. Bearing Temp should not exceed 200F in Ambient conditions.
Does the blower make unusual screeching sounds after the first 5 seconds of startup?
if the answer is "oneOf [Yes]"
Check the belt Tension.
Both Process Blower stickers in place, the lubrication record and the zerk injection lubrication directions.
Power ON Unit: Connect Generator and Propane
Inspect ultrasonic/float level switch housing for moisture and tighten all terminations. Verify operation.
Inspect power cord for damaged insulation and replace if necessary.
Inspect igniter wiring and tighten electrical connections.
Remove and clean burner ring and burner tips with compressed air. Replace damaged tips.
Inspect thermal generator (relighter) for corrosion. Clean or replace as needed.
Inspect door, hinges, latches, and locks. Repair or replace as needed.
Inspect safety relief valve for damage, corrosion, or obstruction. Replace at 5-year intervals or sooner if damaged.
Cycle all ball valves fully open/closed and verify locking handles are present. Replace defective valves.
Inspect Acme fittings and camlocks for wear, cracks, or damaged seals. Replace as necessary.
Remove vent cap and inspect insulation around vaporizer tube. Report deterioration.
Remove top cover and inspect refractory and doughnut gasket condition. Verify proper positioning.
Clean exterior, tighten clamps, touch up paint, and inspect overall condition.
Air Compressor
Ensure a 0-150 PSI Pressure Gauge is installed before the regulator.
Verify the compressor stops at ~135 PSIG in the main tank.
Panel Lights
Activate each button and switch to confirm it lights up when turned on.
Area Lights
Inspect all area lights by turning them on, replace bulbs as needed, and check for rust or water damage.
Vaporizer
Functional Checks (Power and Propane Required)
Soap-test all valves, fittings, regulators, Acmes, camlocks, and piping for leaks.
Verify igniter produces a strong spark.
Inspect pilot assembly and ignition system. Replace components as necessary.
Inspect relight module operation and condition. Replace if corroded or non-functional.
Inspect thermo-probe wiring and gas valve connections. Tighten and repair as required.
Verify pilot solenoid valve operation and check for leakage.
Verify burner ring lights evenly around entire circumference.
Verify thermo-probe shuts burner off at approximately 120°F vapor temperature.
Verify fuel gas valve transitions correctly through OFF → PILOT → ON positions.
Chart Recorder
Verify the display powers up with no error codes or flickering
Pen & Paper Operation: Correct date and time stamp, legible temperature recordings.
Temperature Accuracy: Compare temperature reading with High Limit Controller and verify readings are within 50F of each other.
Output Control: Test output control by placing in manual and driving the mod motor with the arrow keys.
Alarm Outputs: At 1400F, verify the top green panel light turns on, and the Process Isolation Valve opens.
Alarm Outputs: At 1550F, verify the top red panel light turns on. If temperature cannot be raised above 1550F, adjust Alarm setpoints A2S1 and A2S2 below current temperature to simulate.
Process Valve
Raise unit above 1400°F and verify valve fully opens and closes promptly. If the valve takes more than 30 seconds to close, replace the air dump valve.
Burner
Verify that the modulating actuator moves to high during the 90 second high fire purge and moves to low when the BMS says to start.
Interlocks
High Limit Temperature: While BMS is going into purge, change the set point below the chart recorder temperature and verify a "stoppage" in BMS activity.
High Limit Temperature: While unit is running, lower high temperature set point below chart recorder temperature and verify burner shut down.
UV Scanner: While unit is running, remove UV scanner from unit. Do not expose to direct sunlight. Cover optical lens and ensure that the unit shuts down.
LEL Analyzer: Calibrate LEL in accordance with the procesures, verify analyzer is not bypassed by valves or jumped wires behind LEL controller.
LEL Analyzer: Test high LEL shutdown by lowering the setpoint to 0%. (Add a bias if current reading is 0%) Verify the unit shuts down. Remove any added bias.
Process Blower Pressure Switch: Open cover of pressure switch and verify that sensor is not jumped. Remove tubing from sensor and verify that interlock is tripped on BMS.
Process Blower Pressure Switch: Verify on the pressure switch box that one wire is on common and one wire is on Normally Open.
Combustion Blower Pressure Switch: Open cover of pressure switch and verify that sensor is not jumped. Remove tubing from sensor and verify that interlock is tripped on BMS.
Combustion Blower Pressure Switch: Verify on the pressure switch box that one wire is on common and one wire is on Normally Open.
FA Temperature Switch: Remove temperature switch. Wrap heating element around probe, set temperature to 410°F. Verify contacts open with ohms meter at 400°F. (Different from Test Fire)
Firebox and Main Panel
Scan the entire exterior firebox wall with a temperature gun and record any areas exceeding 200°F.
Verify Carseal is installed on Main Panel.
Are the unit aesthetics in good condition? (Flag is in need of paint and signs of rust)
if the answer is "noneOf [PASS]"
Attach photos
Add or drag pictures
Vaporizer Serial Number and Year:
Burner Serial Number and Year:
DA Cell Serial Number and Year Manufactured:
FA Cell Serial Number and Year Manufactured:
Technician Closure Signature
PM Lead
PM Lead Signature
Click here to sign
Supervisor Closure Approval Signature
Quality Check Name
Quality Check Signature
Click here to sign
Source: Envent Corporation (Community Member)