If you are just replacing a receiver then you do not need a tech to come out. Techs are only needed if you are adding in a new box. Make sure when you call in that you have the registration number from the digital box you are looking to swap out. Its located on a sticker normally on the back.
if you purchase a PVR 430 from Londondrugs or futureshop you can have Tech install for free otherwise there will be a possible charges involves, You can also contact Customer service to have PVR rental and have a tech to install it