12-05-2014 06:50 PM
I forgot to answer your specific questions.
There is no setting in the ADEM 3 controls to prevent cranking and trying to start the engine when it is cold or any other time, strictyl related to coolant or oil temperature. The warrant will not be affected if the engine is not equipped with an oil heater or a jacket water heater. However, starting conditions without these accessories may cause lube issues or piston scuffing issues during starting under these cold conditions. Further, if the engine is not properly warmed up, and load is applied to quickly, piston scuffing/seizure may not be covered under warranty if the failed parts indicate premature loading before the engine is warmed up.
Cat has an Engine News article, published in 2008, that discusses the starting/warmup procedure in more complete detail. Here is some of the text:
Protection for Engines with the ADEM 3 Electronic Control Module
The programmable parameter "High Engine Oil to Engine Coolant Differential Temperature" can
activate a warning or a shutdown. The parameter is intended to prevent a condition with cool jacket
water and hot engine oil. Because there is usually a difference between the temperature of the jacket
water and of the engine oil during start-up and during warm-up, the "High Engine Oil to Engine Coolant
Differential Temperature" parameter does not have any effect on operation until the engine load
It is preferable for the jacket water to be slightly warmer than the engine oil. However, the engine oil
usually warms up faster than the jacket water. This creates a condition with a cool cylinder liner and a
hot piston. This condition can cause seizure of the piston. The programmable parameter "High Engine
Oil to Engine Coolant Differential Temperature" is intended to help prevent the condition.
Programming the "High Engine Oil to Engine Coolant Differential Temperature" to a precise tolerance
prevents loading before the engine is properly warmed up. Follow these recommendations:
For the warning level, program the parameter to 1° C (2° F).
For the shutdown, program the parameter to 3° C (5° F).
Operation During Warm-Up
Proper operation during engine warm-up is essential for avoiding premature wear and possible damage
to the engine. Train the operator to follow these recommendations for loading of the engine and for
monitoring of the temperatures:
After start-up, keep the engine load to a minimum during warm-up.
Before applying a load on the engine up to a maximum of 49 percent, ensure that the minimum
temperature of the jacket water is 38° C (100° F) and the minimum temperature of the engine oil
is 10° C (50° F).
Before applying a load on the engine from 50 to 100 percent, ensure that the minimum
temperature of the jacket water and of the engine oil is 50° C (122° F).
For an engine that operates with a programmable logic controller (PLC), program the
requirements for loading of the engine into the PLC.
12-05-2014 06:39 PM
Cat recommends the use of a lube oil heater if the ambient starting temperature will be 50 deg F or lower. Cold lube oil in the engine will be a serious deterrent to reaching the recommended cranking speed of 80 rpm minimum. The target cranking speed for a G3600 is 100-120 rpm. The lube oil heater should just circulate the engine lube oil from one end of the oil pan to the other after passing through the oil heater. Target temperature setting is 100-110 deg F.
Cat recommends the use of a jacket water heater if the ambient temperature will be below 70 deg F. The jacket water heater will be very beneficial in keeping the jacket water coolant warm to prevent moisture from condensing on the spark plug electrode gap. This will prevent the engine from starting; the spark plugs will have to be removed, possibly multiple times, if this condition exists. So a jacket water heater, set to a temperature of 110 deg F will be very beneficial.
I would strongly recommend both an oil heater and a jacket water heater for the climate in Alberta; especially if the engine is not going to run 24/7!!
12-05-2014 01:44 PM
We have a customer who has requested a 3608 with ADEM3, but does not want the glycol hot start. I am trying to find out if there is a permissive that prevents the engine from starting if the glycol temp is too cold? Or if having this setup will affect warranty in any way? This will be for use in Alberta.
Thanks for any help.