Dismantling old solar water heater
Posted: Tue 08 Feb 2011, 00:26:29
Folks, i'm looking for some advice to guide me in my attempt to remove some old solar panels from the roof of my house.
History:
Our house was built in 1979 and either during construction or at some later date a solar hot water heater was added to the northern roof. At some point the previous (original) owners decommissioned the solar panels and installed an electric cylinder (i suppose the cylinder ID will give a date of manf. but i have never thought to look).
Problem:
In the past few weeks i have spent a lot of time on the roof (and inside it) as i have been installing ceiling batts/insullation, i have decided to remove the old panels for two reasons; firstly, i need to do so to access the roof space beneath them which i cannot reach from any direction other than above. Secondly, i have noticed that the panel supports that hold the panels to the roof structure are severely corroded (of the four supports two look okay, one is quite rusty but the fourth no longer exists in any meaningful way) this is causing the whole panel assembly to droop and could theoretically result in a failure seeing the panels fall off the roof with associated chaos and mayhem.
Panel Description:
As best i can tell the external frames are riveted aluminium sheet metal with either a perspex or glass lid. The internals of the units look similiar to a oil radiator, two sheets of copper(?) pressed together with plumbing fittings to allow water in one side and out the other, there are three panels plumbed together in the system. Just looking into the panels from above it appears that the copper sheets are lying ontop of some fibreglass(?) insulation. There is no tank attached to the panels so i assume they were some type of split system previously, with a tank and pump situated on the ground nearby.
Current Plan:
As i have no idea how much these panels weigh and don't have a crane handy i am planning to dismantle each panel on the roof and then lower the components one by one.
My biggest concern is that the insullation underneath the copper could be asbestos.
Does anyone have any knowledge on materials used to manufacture solar panels in the late 70s, or any other useful advice?
History:
Our house was built in 1979 and either during construction or at some later date a solar hot water heater was added to the northern roof. At some point the previous (original) owners decommissioned the solar panels and installed an electric cylinder (i suppose the cylinder ID will give a date of manf. but i have never thought to look).
Problem:
In the past few weeks i have spent a lot of time on the roof (and inside it) as i have been installing ceiling batts/insullation, i have decided to remove the old panels for two reasons; firstly, i need to do so to access the roof space beneath them which i cannot reach from any direction other than above. Secondly, i have noticed that the panel supports that hold the panels to the roof structure are severely corroded (of the four supports two look okay, one is quite rusty but the fourth no longer exists in any meaningful way) this is causing the whole panel assembly to droop and could theoretically result in a failure seeing the panels fall off the roof with associated chaos and mayhem.
Panel Description:
As best i can tell the external frames are riveted aluminium sheet metal with either a perspex or glass lid. The internals of the units look similiar to a oil radiator, two sheets of copper(?) pressed together with plumbing fittings to allow water in one side and out the other, there are three panels plumbed together in the system. Just looking into the panels from above it appears that the copper sheets are lying ontop of some fibreglass(?) insulation. There is no tank attached to the panels so i assume they were some type of split system previously, with a tank and pump situated on the ground nearby.
Current Plan:
As i have no idea how much these panels weigh and don't have a crane handy i am planning to dismantle each panel on the roof and then lower the components one by one.
My biggest concern is that the insullation underneath the copper could be asbestos.
Does anyone have any knowledge on materials used to manufacture solar panels in the late 70s, or any other useful advice?