FM200™ SYSTEM |

Preventative Maintenance
Checklist + Download
Last Updated: August 16, 2023, by Bob Morris
NFPA 2001, Standard on Clean Agent Fire Extinguishing
Systems stipulates that an FM-200™ system should be
maintained and inspected regularly to ensure that the system
and its components are configured, set up, and ready for
operation when needed based upon the following intervals:

 Daily
 Monthly
 6 Months
 1 Year
 2 Years
 5 Years
Below we detail the FM200™ inspection requirements,
frequencies, and documentation, with an example PDF at the
end of the article that can be viewed.
Table of Contents

🟩 Who will complete the

maintenance?
If the building construction process is still ongoing or it is still within
the defect’s liability period, then the responsibility for the
maintenance will be the general/main contractor.

Where the building/systems are outside of the defects liability

period, the maintenance of the unit will be completed by the
building facilities manager/operator.

They will either have their in-house team complete the works or will
sublet to a facilities maintenance/building services contractor.

🟩 Parts of an FM-200 System

The following components will usually form part of an FM-
200™ System and should be included in the checks:

 Signage
 Bottle Cage/Bottle Rack and Bracketry
 Pilot Gas Bottle/s [optional]
 Main Gas Bottle/s
 Clean Agent Gas
 Pressure Gauge
 Pressure Relief Valve
 Pilot Line
 Check Valves
 Hangers and Supports
 Discharge Header/Manifold
 Distribution Pipework
 Pipework Fittings and Connections
 Discharge Nozzles
 Control Panel
 Battery
 Battery Charger
 Control Valve/Solenoid
 Local Door Panel
 Emergency Release Button
 Key Switch
 Sounder/Bells
 Beacon/Strobe
 Smoke/Heat Detectors
 Ventilation Damper System Interlocks
 Ventilation and Air Conditioning Equipment Tripping
System
If you want to read more on the FM-200 Clean Agent System see our article 'FM200 System | What is it?'
🟩 Qualifications of Engineers
All works will be completed by an experienced, knowledgeable, and
trained engineer who has previous relevant experience completing
this type of work.

🟩 Remedial Works
Depending on the critical observations, the remedial works will be
completed by the manufacturer or qualified engineer.

🟩 Standard Routine Maintenance

Schedule
Based upon the manufacturer and NFPA 2001, Standard on Clean
Agent Fire Extinguishing Systems, the routine, and timings for the
checks will be broken into the following time frames:

 Daily Inspections
 Monthly Inspections
 6 monthly inspections
 Yearly inspections
 2 Yearly Inspections

🟩 Daily Inspection Checklist

 5 Yearly inspections
Ensure the inspection is completed in line with all specific health
and safety requirements of the site/building and all permits are in
place:

REF TYPE INSPECTION/TASK NOTES

D-1 InspectTaking onboard any temperature If the gauges show a loss

differences, check each cylinder of more than 5% at the
pressure gauge to ensure proper cylinder valve, then the
operating pressures are shown. bottle will need to be
refilled in line with
manufacturers’
requirements.

FM-200 Preventative Maintenance Checklist

[MS Word] + [MS Excel]
An open copy of our checklist, taking into account NFPA 2001, including all items in this
article + A3 open layout so gives an option of the format for you to use.
Covering | Daily, Monthly, 6 Monthly, 1 Yearly, 2 Yearly, 5 Yearly
Also, we have converted the Checklist into Microsoft Excel as a bonus and included
for FREE
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🟩 Monthly Inspection Checklist

content/resources, keeping those annoying banner adverts away.

Ensure the inspection is completed in line with all specific health

and safety requirements of the site/building and all permits are in
place:

REF TYPE INSPECTION/TASK NOTES

M-1 Revie Review the protected space to ensure the If any changes,
w hazard or usage has not been changed or raise this with the
modified. building owner
immediately.
M-2 Revie All previous observations have been
w rectified and closed.
M-3 Inspect Inspect the complete system to note any Where any damage
damage or missing parts. is noted, remedial
action must be
completed
immediately.
M-4 Inspect Inspect the pipework for any rust or Where rust and/or
corrosion. corrosion is noted
treatment, cleaning
and repainting
should be
completed
REF TYPE INSPECTION/TASK NOTES

immediately.
M-5 Inspect Inspect system discharge nozzles to ensure Where
are not obstructed, clogged, dirty, painted, obstructed/clogged,
etc. remedial action
must be completed
immediately. If
noted are dirty,
ensure they are
clean.
M-6 Inspect Inspect system beacons, strobes, sounders Where obstructed,
detectors to ensure are not obstructed, dirty, remedial action
painted, etc. should be
completed. If noted
are dirty, ensure
they are clean.
M-7 Inspect Inspect mechanical fans and dampers to Where obstructed,
ensure are not obstructed. remedial action
should be
completed.
M-8 Inspect Access to the area is unobstructed. Where obstructed
remedial action
must be completed
immediately.
M-9 Inspect Access to cylinders is unobstructed. Where obstructed
remedial action
must be completed
immediately.
M- Inspect Ensure system discharge nozzles are not Where obstructed
10 restricted or obstructed. remedial action
must be completed
immediately.
M- Inspect Access to control/releasing panel is Where obstructed
11 unobstructed. remedial action
must be completed
REF TYPE INSPECTION/TASK NOTES

immediately.
M- Inspect Inspect the control/releasing panel has Any issues should
12 power and no alarms on the system. be investigated and
corrected
immediately. Any
alarms should be
cleared or
investigated and
assessed to
understand if there
are any
fundamental
problems.
M- Inspect Where any batteries are installed to provide
13 a resilient electrical supply, inspect that the
charge is in line with the design.
M- Inspect Access to manual emergency switches is Where obstructed
14 unobstructed. remedial action
must be completed
immediately.
M- Inspect Inspect emergency switches/pull stations for Where any damage
15 damage. is noted, remedial
action must be
completed
immediately in line
with
manufacturers’
requirements.
M- Inspect Inspect pressure switches for damage Where any damage
16 is noted, remedial
action must be
completed
immediately in line
with
REF TYPE INSPECTION/TASK NOTES

manufacturers’
requirements.
M- Inspect Inspect all discharge hoses for any fraying, Tighten any
17 damage, loose connections, cracks, and cuts. connections and
replace hoses that
are damaged, with
an equally rated
hose.
M- Inspect Inspect any actuation lines for damage, Tighten any
18 loose fittings, cracks, or cuts and cleanliness connections and
replace lines that
are damaged, with
equally rated
equipment.
M- Inspect Inspect all fittings and adaptors to bottles to Tighten any
19 ensure are not damaged or loose. connections and
replace anything
that is damaged.
M- Inspect Inspect all pilot tube connections to ensure Tighten any
20 are not damaged or loose. connections and
replace anything
that is damaged.
M- Inspect Inspect all FM-200 bottle pressure operated Tighten any heads
21 control heads for damage, corrosion, cracks, that are loose,
cleanliness, and if loose. clean in line with
manufacturers’
advice, and replace
anything that is
damaged.
M- Inspect Inspect all FM-200 bottle electronic control Tighten any heads
22 operated heads for damage, corrosion, that are loose,
cracks, cleanliness, and if loose. Also, clean in line with
ensure to check all electrical connections to manufacturers’
ensure are tight advice, and replace
REF TYPE INSPECTION/TASK NOTES

anything that is
damaged.
M- Inspect Inspect Cylinder and its valve assembly for Replace any
23 damage, corrosion, cracks, cleanliness, and damaged parts in
general wear and tear. line with
manufacturers’
requirements.
M- Inspect Inspect Cylinder burst disc and pressure Replace any
24 gauges and its valve assembly for damage, damaged parts in
corrosion, cracks, cleanliness, and general line with
wear and tear. manufacturers’
requirements.
M- Inspect Inspect all brackets and straps/ mounting Replace/tighten
25 equipment that are securing the bottles in any that are loose
place. or damaged in line
with the
manufacturer’s
requirements.
M- Weigh Using a calibrated scale, weigh all FM200 Where measured
26 Cylinders and compare results with weight is 95% of
expectations, to ensure the quantity of gas is the original charge
correct, and attach the result to the FM200 weight, replace the
cylinder for proof. cylinder in line
with the
manufacturer’s

🟩 6-Month Inspection Checklist

requirements.

Ensure the inspection is completed in line with all specific health

and safety requirements of the site/building and that all permits are
in place:
RE
TYPE INSPECTION/TASK NOTES
F

6-1 Weigh Weigh: Using a calibrated scale, weigh Where measured

all FM200 Cylinders and compare results weight shows a loss of
with expectations, to ensure the quantity 5% of the original
of gas is correct, and attach the result to charge weight, replace
the FM200 cylinder for proof. The the cylinder in line with
following information should be the manufacturer’s
documented on a tag and attached to the requirements. [see later
bottle: sections for an
overview of how to
Date of inspection weigh the bottles]

Person performing inspection

Type of gas

The gross weight of the bottle and net

weight of agent [halocarbon clean agents
only]

Container pressure and temperature

6-2 Verify Inspect: Use a calibrated device to prove Where any issues are
the FM200 bottle pressure gauges are noted, gauges should be
displaying the correct information. replaced in line with
the manufacturer’s
requirements.
6-3 Test Test: all pressure switches for operation. Any issues remedial
actions should be
completed
immediately. [see later
sections for an
overview of how to
test]
6-4 InspectTest: Electric control head Any issues remedial
actions should be
RE
TYPE INSPECTION/TASK NOTES
F

completed
immediately. [see later
sections for an
overview of how to
test]
6-5 InspectInspect: the enclosure of the space (walls, Any issues should be
floors, ceilings) to understand if there are rectified, and a room
any changes to its integrity such as new integrity test conducted.

🟩 12-Month Inspection Checklist

holes or failed fire stopping, etc.

Ensure the inspection is completed in line with all specific health

and safety requirements of the site/building and that all permits are
in place:

REF TYPE INSPECTION/TASK NOTES

Y-1 Test Test complete full testing of the

system, discharge test not required,
including all ventilation
integrations to prove operating in
line with the design.
Y-2 Inspect Inspect the enclosure of the space Any issues should be
(walls, floors, ceilings) to rectified sealing all holes
understand if there are any changes in line with the fire
to its integrity such as new holes or rating of the wall/floor,
failed fire stopping, etc. and room integrity test
conducted.
Y-3 Documen Documentation – Ensure all
t documentation is up to date and
REF TYPE INSPECTION/TASK NOTES

🟩 24-Months Inspection Checklist

stored/filed correctly.

Ensure the inspection is completed in line with all specific health

and safety requirements of the site/building and that all permits are
in place:

RE
TYPE INSPECTION/TASK NOTES
F

2-1 Test Blow through Pipework to clear it of any In line with the
dust and debris that has accumulated manufacturer's
over time. instructions.
[see later sections for an
overview of how to

🟩 60-Month Inspection Checklist

weigh the bottles]

Ensure the inspection is completed in line with all specific health

and safety requirements of the site/building and that all permits are
in place:

RE
TYPE INSPECTION/TASK NOTES
F

5-1 Test Bottle Test – Bottles that have In line with the noted
not been discharged and in pamphlet.
continuous service should have a
RE
TYPE INSPECTION/TASK NOTES
F

complete visual inspection in line Where damage or corrosion

with the Compressed Gas is noted, the cylinder should
Association Pamphlet C-6. be emptied, tested, and
restamped.

If the bottles have been

discharged a full test and
restamping should be
conducted in line with
the Department of Transport
Code of Federal
Regulations (CFR) Title 49,
Section 173.34.
19No. Site Equipment / Maintenance
Checklists [MS Word] [MS Excel]
We have created this bundle to consolidate all the Equipment Pre-Commissioning and
Maintenance Checklists that are available across the site.
The checklists are provided in Microsoft Word and Excel.
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🟩 Steps to Complete Works

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Below we run through some steps to complete the weighing and

testing of the following:

 Weighing of FM-200 cylinders

 Single cylinder removal
 Single cylinder reinstatement
 Multiple cylinder removal
 Multiple cylinder reinstatement
 Pressure switch test
Electric control head test

🟧 Weighing of FM-200 Bottles Overview



To allow the weighing of the FM-200 bottles, they will need to be

removed from the system and placed onto a scale.

The below will provide a high-level overview of how to complete

these works; ensure to check with the manufacturer and system
designer for the specific method for your building.
🟨 Single Cylinder System [Removal]

STEP INSPECTION/TASK

Step 1 Disconnect the electrical connection at the supervisory pressure

switch (if installed), then remove the wire lead protection or
conduit. Install the protective cap on the switch connection port
after unscrewing the switch from the cylinder valve.
Step 2 Remove the control head from the FM-200 cylinder by
disconnecting the swivel nut on the control head from the
cylinder valve actuation port.
Step 3 Cover the actuation port of the FM200 cylinder valve with a
protective cover.
Step 4 Loosen the swivel nut and remove the flexible discharge hose
from the outlet port adapter.
Step 5 Install the safety cap on the cylinder valve outlet port.
Step 6 Undo the FM200 bottle cylinder strap/bracket.
Step 7 Remove the cylinder.
Step 8 Place the cylinder on a scale and measure weight.
Step 9 From the plate information [metal stamp] on the cylinder subtract
the gross weight of the cylinder from the tare weight [empty] to
understand the net weight of the original gas charge.
Step 10 Weigh the cylinder then subtract the tare weight from the scale
weight to understand the net weight of the agent in the cylinder.
If the net weight is less than 95% of the original gas charge the
cylinder should be replaced.
Step 11 Record the following:

Bottle reference

Date

Cylinder tare [empty] weight [from bottle information]

 STEP INSPECTION/TASK

Gross cylinder weight [from bottle information]

Scale weight

Net gas charge weight

Step 12 Attach the information to the cylinder

🟨 Single Cylinder System [Reinstatement]

Once weighing has been completed, the bottle should be

reinstalled in the system.

STEP INSPECTION/TASK

Step 1 Remove the cylinder/bottle from the scale.

Step 2 Place the cylinder back into the fixing/bracket system with the
valve outlet towards the cylinder discharge piping.
Step 3 Tighten the strap/bracket to hold the bottle in place.
Step 4 Remove the safety cap from the head and outlet port.
Step 5 Reconnect the flexible discharge hose to the outlet port.
Step 6 Remove the protective cover from the actuation port of the
cylinder valve
Step 7 Install the control head.

Ensure the actuating pin is fully retracted before attaching to the

cylinder so that there is no risk of accidental discharge.
Step 8 Reinstall the electrical supervisory pressure switch.

🟨 Multiple Cylinder System [Removal]

 STEP INSPECTION/TASK

Step 1 Disconnect the electrical connection at the supervisory pressure

switches (if installed), then remove the wire lead protection or
conduit from all bottles Install the protective cap on the switch
connection port after unscrewing the switch from the cylinder
valve.
Step 2 Remove the control head from each FM-200 cylinder by
disconnecting the swivel nut on the control head from the
cylinder valve actuation port.

Leave the flexible actuation hoses to the pressure operated

control heads.
Step 3 Cover all actuation ports of the FM200 cylinder valves with a
protective cover.
Step 4 Remove the tubing from the master cylinder adapter on the
master cylinder.
Step 5 Install the safety cap on the master cylinder adapter port.
Step 6 Remove the flexible discharge hose from the outlet port by
loosening the swivel nut.

Ensure that there is a safety cap installed at the cylinder valve

outlet.
Step 7 Undo the FM200 bottle cylinder strap/bracket.
Step 8 Remove the cylinder.
Step 9 Place the cylinder on a scale and measure weight.
Step 10 From the plate information [metal stamp] on the cylinder
subtract the gross weight of the cylinder from the tare weight
[empty] to understand the net weight of the original gas charge.
Step 11 Weigh the cylinder then subtract the tare weight from the scale
weight to understand the net weight of the agent in the cylinder.

If the net weight is less than 95% of the original gas charge the
cylinder should be replaced.
Step 12 Record the following:
 STEP INSPECTION/TASK

Bottle reference

Date

Cylinder tare [empty] weight [from bottle information]

Gross cylinder weight [from bottle information]

Scale weight

Net gas charge weight

Step 13 Attach the information to the cylinder

🟨 Multiple Cylinder System [Reinstatement]

Once weighing has been completed, the bottles should be

reinstalled in the system.

STEP INSPECTION/TASK

Step 1 Remove the cylinder/bottle from the scale.

Step 2 Place the cylinder back into the fixing/bracket system with the
valve outlet towards the cylinder discharge piping.
Step 3 Tighten the strap/bracket to hold the bottle in place.
Step 4 Remove the safety cap from the head and outlet ports.
Step 5 Reconnect the flexible discharge hose to the outlet ports.
Step 6 Remove the protective cover from the master cylinder adaptor port
then reconnect to the slave bottle ports on the master cylinder.
Step 7 Remove the protective caps from all other FM-200 cylinder valve
ports.
 STEP INSPECTION/TASK

Step 8 Install the control heads.

Ensure the actuating pin is fully retracted before attaching to the

cylinder so that there is no risk of accidental discharge.
Step 9 Reinstall the electrical supervisory pressure switches.

🟧 Pressure Switch Test Example

The following is a simple overview of how a pressure switch test
could be tested, depending upon the system design and
components.

STEP INSPECTION/TASK

Step 1 Ensure the relevant permit to work and health and safety
paperwork is in place and works are authorized.
Step 2 The full system is fully operational
Step 3 Operate the pressure switch manually by pulling up on the
plunger
Step 4 Verify that all systems are integrated with the FM200 system
shut-down, ventilation, access control etc.
Step 5 Reset pressure switch and systems.

🟧 Electric Control Head Test

The following is a simple overview of how an electric control head
could be tested, dependent upon the system design and
components.
 STEP INSPECTION/TASK

Step 1 Ensure the relevant permit to work and health and safety paperwork
is in place and works are authorized.
Step 2 Ensure all electric control heads are disconnected from the FM200
cylinders & nitrogen pilot cylinders serving the area, to remove risk
of any accidental discharge.
Step 3 The full system is fully operational
Step 4 Activate the system via pushing the manual emergency activation
button.
Step 5 Verify that the system has operated, the electrical control head will
switch to its released position via the movement of pin. Any heads
that have not activated, check their electrical continuity. Replace any
damaged, non-operating heads and repeat the test to ensure total
system is working.
Step 6 Manually reset the control heads to ensure will not create an
accidental discharge when being re-connected to the bottles, then
connect back onto their applicable cylinder.
Step 7 Check system is automatic and ready to operate if needed.

Example hydraulic
maintenance schedule -
daily, weekly, annual
Jun 13, 2017

The need for hydraulic preventive maintenance is determined over

time by operating conditions of the various hydraulic components.
For example, a service interval of 10,000 hours (about 14 months)
is generally recommended for piston pumps.

The following schedules are intended as guidelines. Experience

and operating conditions will determine actual schedules. Refer to
OEM datasheets for specific maintenance instructions.

Maintenance tasks: Daily

 Check oil levels in power unit tanks.
 Check for temperature changes in the oil.
 Check the system for water or dirt in the oil.
 Check for leaks.
 Check and tighten screws and pipe clamps.
 Verify pressure gauge readings.
 Monitor the running noise of pumps and electric motors to
identify changes.
 Empty all valve panel drip pans.
 Check for possible leaks in valve groups by wiping an item
clean before inspecting it.
 Keep surfaces of pipes, components and tanks clean.
 Check with operators to determine if any service or
maintenance is required.
 Check the service book to see if operators have recorded any
problems.

Maintenance tasks: Every six weeks

 Check air filters.
 For filters with a contamination indicator, replace the filter
element when the indicator shows a dirty filter.
 Check and clean the strainer in the cooling water pipe.
 Clean the hydraulic power unit and check for possible leaks.
 Check for possible leaks in the piping connections.
 While the pumps are stopped, tighten any loosened
connections. Tighten only to stop the leak and no tighter.
 Replace any fittings or pipes which continue leaking after
being tightened. Replace any leaking seals.
 Check the condition of hydraulic hoses. Remove major dirt
buildups. If the hoses have cracks or if oil seeps between the
sleeve and hose (hose end is moist), replace the hose.
  Check the condition of all hydraulic cylinders. Remove any
dirt, especially from piston rod pivots.
 Tighten pipe clamps, if necessary.
 Tighten bolts on the pumps, electric motors, valves, etc.
 Record all maintenance in the service book.

Maintenance tasks: Every six months

 Send an oil sample to the oil manufacturer or a reputable oil
testing service to check for contaminants and wear. The oil
sample should be analyzed for viscosity, wear metals, particle
count and (in hot conditions) the neutralization value.
 If the machine has accumulators, check their pre-charge
pressure.
 Check the service book. Write down any recurring problems
and carry out any requested maintenance recorded in the
book.

Maintenance tasks: Annual

 Drain the power unit oil tank and clean the tank. Carefully
remove any dirt accumulated on the bottom of the tank
(inside). Thoroughly clean the insides of the tank using a
cleaning solution approved by the oil supplier. Do not use
cotton waste or cloths when cleaning the tank. If there is a
time delay between cleaning and refilling the tank, keep it
sealed to prevent moisture from getting inside the tank. Flush
the piping.
 If the oil is to be re-used, make sure to drain it into clean
containers.
 When re-filling the tank, make sure to filter the new or re-used
oil using a separate filter unit.
 Check the pump and motor couplings.
 If the proportional valves require service, notify the component
manufacturer or a service engineer authorized by that
manufacturer to perform maintenance.
 Check the condition of the hydraulic system by testing all
hydraulically actuated components.

For more information on hydraulic maintenance, contact your

Valmet representative or check out Valmet's training services.