Wren 44 TurboProp Users Manual. Copyright Wren Turbines Ltd February 2008 Page 15
The warranty
Wren Turbines warranties this Wren44 TurboProp engine and associated equipment, free of mechanical
defects in workmanship or materials for two years after purchase date.
Engine Control Unit (ECU).
The ECU has a one year warranty which covers repair or replacement of the main unit and the display.
Improper use such as polarity reversal, short circuit, ingress of foreign matter or crash damage is excluded.
Warranty Conditions:
1
The engine may not be dismantled except the removal of the front (green) cover, to access
the service connections and speed sensor.
2
The fuel pump, ecu and rpm pickup may not be dismantled or manufacturers seal/covering
broken by way of investigation. If either unit is suspected as defective it should be
returned intact to Wren Turbines Ltd who will check the serviceability of the item and
replace if found defective.
3
The engine
MUST
be started and operated exactly as instructed. This includes (i) correct
mounting of the engine with correct inlet and exhaust ventilation (ii) use of the correct
battery packs (iii) use of the supplied fuel pump (iv) use and correct operation of the
supplied ECU, (v) use of supplied wiring harness.
4
Only the recommended fuel is used.
5
Excludes parts damaged by excessive heat due to incorrect operation (starting, running,
cooling etc).
6
Excludes parts damaged by ingestion of foreign objects (ie wires, model materials and
fittings, water, sand or grit).
7
Excludes engine repairs where blockages in the fuel system have occurred due to use with
unfiltered, or contaminated fuel.
8
Excludes damage to the unit in event of nose-over or damage inflicted through prop-strike.
9
Crash damage to the engine and its ancillaries is not covered by the warranty.
10
Warranty is not transferable.
Notes for the inquisitive
.
Please do not attempt to disassemble this engine. You will breach your warranty agreement and you will find
it is a precision assembly which you will be unlikely to re-assemble without considerable difficulty and
specialist equipment. Simply slackening the spinner nut of the rengine otor may lose the delicate balance
condition without which the engine may not run without damage to its rotating assembly.
You are permitted to access the fuel and gas connections under the green cover in event of repair or
replacement of the fuel or gas pipes. Access may also be gained to the magnetic rpm pickup if repair or
replacement is required. Access to the gearbox should never be required. It does not require cleaning out or
additional lubrication so should be left alone.
You may not dismantle the engine further. Any further investigation must only be undertaken by Wren
Turbines Ltd.
Repair.
Damage or defective operation covered under the warranty terms will be repaired and tested at no cost to
the original owner (other than post and packing). Repairs not covered under the terms of the warranty will be
carried out by Wren Turbines Ltd, or their appointed agents, after agreement of costs.
Before returning the engine or ancillary equipment for service or repair, please contact Wren Turbines Ltd or
Wren Service Agent to agree action and costs. When returning an engine please be sure to seal both gas
and fuel pipes and pack the pump and engine unit in clean polythene bags to prevent entry of dirt.
