Summary of Contents for Generac Power Systems MAC 950F
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MAC 950F Flameless Air Heater Owner’s Manual MODEL NUMBER: _________________________ SERIAL NUMBER: _________________________ DATE PURCHASED:________________________ Register your Generac Mobile Products at: WWW.GENERACMOBILE.COM 1-800-926-9768 SAVE THIS MANUAL FOR FUTURE REFERENCE...
The MAC 950F flameless air heater is designed and built for sustained, reliable heat production in industrial operating conditions and environments. The MAC 950F is built to withstand frequent handling under these conditions.
General Information Section 2 General Information Component Locations 001641 001640 Left Side Right Side Table 1 - Heater Components Engine radiator Engine oil dipstick Breakaway battery for trailer brakes Engine fuel filters Diesel engine Hydraulic fluid filter Hydraulic fluid fill Hydraulic fluid reservoir tank Hydraulic fluid breather/separator Air intake for engine...
General Information Engine Oil Recommendations Fuel System Change oil and oil filter at least once every 12 months even if the hours of operation are fewer than the otherwise recommended service interval. See the applicable engine manual for recommended oil types. To avoid engine damage: •...
General Information Wheel Chock Guidelines Driving a vehicle with a trailer in tow is vastly different than driving the same vehicle without a trailer in tow. Consider the following: • It takes longer to get up to speed. • More room is need to turn and pass. •...
General Information Information Decals Monitoring, Diagnostic, and Protective Features The unit mechanical and electrical systems are Location Decal Description connected to various sensors that monitor unit status. If • Decal shows tire and loading infor- conditions occur outside of predetermined manufacturing mation parameters, the controller will automatically stop the back...
Operation Section 3 Operation Before Starting Engine Engine Coolant Check Pre-start Checklist Remove radiator fill cap. Check coolant level and degrees of fouling. Level should be approximately 1 cm • Remove all flammable materials and fire hazards (10 mm) below the radiator core top. within 5 feet of heater Install radiator cap securely.
Operation Engine and Heater Startup Close all doors that access the unit’s interior. IMPORTANT NOTE: All doors on the unit must be closed when operating. Turn ignition key to ON. The screen displays “Engine Preheat” (Figure 3-1). Figure 3-3. Engine Warming When the coolant temperature reaches 100 °...
Operation Adjusting Heater Output Heater and Engine Shutdown The heater has two modes, AUTO and MANUAL. The current mode displays at the top of the controller screen. AUTO Mode In AUTO mode, output temperature is manually set, as follows: • To increase output temperature, press (+) (Figure 3-6, item A)
Operation Resetting the Positive Air Shutdown (PAS) The emergency PAS system must be reset after each use according to the steps below: Locate the PAS valve located inside the cabinet of the unit. See Pull T-handle (A) on PAS valve back. Turn reset knob (B) counter-clockwise 90 degrees.
Maintenance Section 4 Maintenance Emissions Information Remove dipstick and wipe it dry with a clean, lint free cloth. For emissions information, see the OEM engine manual. Slowly insert the clean dipstick into the tube. Verify the dipstick is fully seated in the dipstick tube. Maintenance Tasks After ten seconds, remove the dipstick and look at Daily checks must be performed when unit is operated...
Maintenance Maintenance Schedule Adding Coolant The following is the manufacturer’s recommended maintenance schedule. The maintenance items will need to be performed more frequently if the heater is used in severe applications (such as very high or very low ambient conditions extremely dirty/dusty environments).
Maintenance Battery Inspection precautions. Keep unauthorized personnel away. Observe the following precautions when working on batteries: • Remove watches, rings, or other metal objects. • Use tools with insulated handles. • Wear rubber gloves and boots. • Do not lay tools or metal parts on top of battery. •...
Troubleshooting Section 5 Troubleshooting General Troubleshooting Guide Problem Cause Solution Low battery output voltage or discharged Charge or replace batteries battery Loose or corroded connections Clean and tighten connections Faulty start circuit relay Contact an IASD Engine Will Not Crank Blown fuse Replace fuse Defective main switch or start safety...
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Troubleshooting Problem Cause Solution Test fuel, drain water from fuel Poor fuel quality Incorrect fuel/dirty fuel bowl Restricted fuel filter Replace fuel filter element Drain, flush, fill, and bleed fuel sys- Water, dirt, or air in fuel system Engine Misfiring or Runs Irregularly Low coolant temperature Remove and check thermostat...
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Troubleshooting Problem Cause Solution Engine overloaded Reduce engine load Replace air cleaner element as Air cleaner restricted or dirty required Determine cause of low compres- Compression too low sion and repair as required Locate source of leak and repair as Leaks in fuel supply system required Drain fuel and replace with proper...
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Troubleshooting Problem Cause Solution Worn main or connecting rod bearings Excessive crankshaft end play Loose main bearing caps Worn connecting rod bushings and piston pins Scored pistons Worn timing gears or excess backlash Excessive valve clearance Worn camshaft lobes Worn rocker arm shaft(s) Worn valve guides Abnormal Engine Noise Contact an IASD...
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Troubleshooting Problem Cause Solution Determine cause of low compres- Engine compression too low sion and repair as required or con- tact an IASD Test thermostats; replace thermo- Defective thermostat(s) (does not close) stats as required Coolant entering combustion chamber Repair or replace as required, or (failed cylinder head gasket or cracked cyl- contact an IASD inder head)
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Troubleshooting Problem Cause Solution Test and replace thermostats as Defective thermostat(s) required Coolant Temperature Below Normal Defective temperature gauge or tempera- Check gauge, sender, and connec- ture sender tions Cylinder head gasket defective Cylinder head or block cracked Cylinder liner seals leaking Pitted cylinder liners Coolant in Crankcase Contact an IASD...
Troubleshooting Digital Controller Status Messages Message Cause Engine Warming – Please Wait Engine coolant temperature < 100° Engine Preheat Wait approximately ten seconds after heater power up Engine RPMs < 500 Engine is not ready – Check RPMs, Fuel Level or Fuel level <...
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Installation Diagrams and Service Log Section 6 Installation Diagrams and Service Log Engine Harness (1 of 3) Owner’s Manual for Flameless Air Heater...
Installation Diagrams and Service Log Service Log OIL GRADE: _____________________________________ BRAND: __________________________________ COOLANT MIXTURE: _____________________________ BRAND: __________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ __________________________________________________________________________________________ Hours to Coolant Hours to Coolant Date Oil Level Date Oil Level Service Level Service Level Owner’s Manual for Flameless Air Heater...
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