lp-220 Rev. 000 Rel. 007 Date 2.12.18
17
(H)
2. Are all the evacuated tubes intact? If a tube has been damaged or discolored it will reduce system performance and should be replaced.
If a tube is damaged, do not attempt to remove it. Contact the company who supplied and installed the system.
(H)
3. Are there any apparent leaks in the plumbing to and from the collector? Any water trails down the roof, or around the storage tank?
During normal daily hot water use, if the temperature relief valve on the tank or collector is regularly dumping hot water (more than just a
dribble), there may be a problem with the system.
POSSIBLE CAUSES
1. The system has been sized incorrectly (oversized). This will be most apparent in the summer months, when solar radiation levels are high.
2. A problem exists with the electric heating thermostat (electric boosting only).
3. Check expansion tank size. If undersized, water expansion may cause the relief valve to activate.
INVESTIGATION
(H)
To test the system, run the hot water tap in the bathroom or kitchen for 5 minutes to release some heat from the system
(CAUTION: THE
WATER WILL BE HOT. BE CAREFUL.)
After this period, if the tank or collector still regularly dumps hot water, there is a problem. Please contact
the company who supplied and installed the system to organize a service call.
C. Regular Water Dumping
Part 10 - Installation Checklist
The following list is a guide only. Specific items will depend on the nature of the installation.
Item
Yes
No
Collector faces due North/South as closely as possible
Collector is not significantly shaded throughout the day.
Collector is not likely to be struck by falling objects such as branches or falling fruit.
Collector is installed at an angle of 20-80
o
, preferably at a latitude angle.
Collector is installed at an angle of 40
o
or greater in areas prone to large hail (>3/4”).
Frame is secured to structurally sound roof/wall.
Plumbing is leak free.
Plumbing pipe runs are well insulated.
Insulation above roof level is protected against sunlight with foil wrap or equivalent.
Controller is configured correctly with freeze setting (if required).
System is fitted with pressure relief valve on the collector outlet and/or storage tank.
Pressure relief valve will dump only onto high temperature resistant material and will not pose a danger of scalding people.
Pump, controller, and all electrical connections are protected from water.
Evacuated tubes have been cleaned.
Installation record form has been given to customer and basic operation explained.
Functional checks for controller and pump have been completed.
Water quality has been checked.
Collector loop piping has been flushed and cleaned.
Table 6 - Installation Checklist - All Items Should be Checked “Yes” for Installation to be Considered Completed Satisfactorily
