Again just because its bone chilling to cool doesn't mean it will the same else where. That same lg 1.5 ton ac when operated down here in the south and at coast areas would barely cool.At my place, no ac fitting technician uses a vaccum pump. My old 1.5 ton lg ac was bone chilling and it was installed just like that. It still cools effectively but may have been better in case if the lines are vaccum pumped like you said.
But a heat pump in here are heating water to 50c easily.
What is the model number of your lyod AC and what is the square feet of your house and at what height is your room ceiling.