Yes you often can. This topic has been written about here http://www.whitegoodshelp.co.uk/wordpress/can-you-connect-a-dishwasher-to-the-hot-water-supply/
No, not all dishwashers are cold fill machines. Many older model dishwashers have a hot fill design. Only newer models are considered to be more advanced and have a cold fill design for energy efficiency.
The manual states it is.
hot filled dishwasher
A dishwasher should be connected to hot water for optimal cleaning performance.
Most dishwasher fill valves are inside the casing of the dishwasher.Most dishwasher fill valves are inside the casing of the dishwasher.
The dishwasher water valve controls the flow of water into the dishwasher. It opens to allow water to enter the machine during the wash cycle and closes to stop the flow when the cycle is complete. This valve is essential for the dishwasher to properly fill with water, clean the dishes, and drain out the dirty water, contributing to the overall operation of the dishwasher.
The water valve in a dishwasher controls the flow of water into the machine, allowing it to fill up with water for the cleaning cycle and then draining the water out once the cycle is complete.
Usually the dishwasher is located near a sink. If you run the hot water at the sink, that will flush the cold water from the hot water line, so the dishwasher will end up getting more hot water during its fill, and allowing the water to reach higher temperatures. Use the "Heated Wash" option to ensure maximum temperature increase. Dishwasher detergent works best around 145 degrees, so the hotter the water going in, the better it will clean.
To connect a dishwasher to a hot or cold water supply, you will need to locate the water supply line under your sink. You can then use a flexible hose to connect the dishwasher to the water supply line, ensuring a secure connection. Make sure to follow the manufacturer's instructions for the specific type of water connection required for your dishwasher.
Hot water line. If you did hook it up to your cold water line make sure your dishwasher is set to heat the water (some models have a selectable setting for this.)
To connect a dishwasher to the water supply, you typically connect it to the hot water supply. This is because hot water helps to clean dishes more effectively than cold water.
The dishwasher solenoid controls the flow of water into the dishwasher. It opens and closes to allow water to enter the machine during the wash cycle. Without the solenoid, the dishwasher would not be able to fill with water properly, affecting its ability to clean dishes effectively.