No. The system is not designed for hot water. The operating water temperature range is 40–100 °F (4–37 °C). Connecting it to a hot water line will damage the filters and membrane.
The RO process is slightly faster with warmer source water within that range. If you need more speed, ensure your cold water pressure is at least 45 PSI. Higher pressure within the 45-70 PSI range also increases production rate.
If your incoming cold water pressure is below 45 PSI, you must install a booster pump. That's the correct fix for slow production, not using hot water.