Installation Manual for SB32-9PV and SB64-9PV
Solar Boiler Heat Transfer Fluid Draining Instrcutions
Your Solar Boiler™ is precharged with HFT (heat transfer fluid) which is a mixture
of Propylene Glycol USP and distilled water (40/60 by volume). In the event that
you should have to drain and/or refill the Solar Boiler™, follow these instructions to
ensure proper system operation.
Draining the HTF (heat transfer fluid)
The HTF should never be drained during system operation. HTF should only be
drained in the morning before system start up, or at least one hour after system shut
down in the evening. This is to ensure that the HTF is not excessivily hot.
•
Remove the cover from the Solar Boiler. Turn the Solar Boiler off using the
switch located on the Delta T Booster II.
•
Relieve pressure by opening the pressure relief valve at the rear of the Solar
Boiler™ module.
Caution: Fluid may be HOT.
•
Disconnect the 3/8” copper line from the Solar Boiler™ pump outlet. Allow any
fluid from the lines to drain into a container. Leave lines disconnected.
Caution:
Fluid may be HOT.
•
To drain the fluid in the Solar Boiler™ module, you will have to wait until their is
enough sunlight for the system to operate. With a container under the outlet of
the pump, install the “Service Plug” and turn the Solar Boiler™ ON. Keep the
unit on until no liquid comes out of the pump. Turn the Solar Boiler™ OFF. Do
not turn the system ON again until the Solar Boiler™ is refilled.
•
The system is now drained. Connect the 3/8” copper line to the Solar Boiler™
unit. To refill the Solar Boiler™, follow the instructions listed on page 22.
•
Replace the brass cap on the fill tube and hand tighten. Replace the pres-
sure relief valve on the vent tube at the back of the Solar Boiler. Remove the
“Service Plug” and reinstall the “Sensor
Plug”. Turn the Solar Boiler™ ON using
the switch on the Delta-T Booster II, and
replace the cover on the Solar Boiler™.
22
Pump Outlet
Brass Fill Cap
The extracted HTF should be disposed
of at your local Environmental Disposal
Depot.