ENERGY KINETICS Smart Solar EWRA1, Руководство по установке, Страница: 34 / 56

EnerWorks Solar Water Heating Appliance
Installation Manual / Energy Kinetics Inc. - Page
34 -
© 2011 EnerWorks Inc.
5. If the pressure has dropped after 30 minutes, there may be a leak. Spray dish soap solution
on connections (flares at Energy Station, fittings at collectors) and look for bubbling to identify
leak(s). Tighten flares or re-flare if necessary. Remove and re-seat push fittings if necessary.
Ensure that tube “bottoms out” in push fitting. Gently pull back on push fittings to ensure they
have properly engaged. Repeat leak test.
Air pressure could fluctuate slightly due to changing ambient outdoor
temperatures or changing weather conditions.
6. If heat transfer fluid loop is free of leaks, carefully release air pressure by slowly opening
return assembly ball valve. Some fluid may be present in Energy Station from factory testing
and will be forced out return line. Appliance may now be charged and pressurized with heat
transfer fluid. Insulating collector fittings and installing collector flashing and leaf guard (if
applicable) may also be completed.
5.2 Preparation of heat transfer fluid
One collector appliances include a 1-gal US (3.8 L) jug of 100% Propylene Glycol. Two jugs are
included with two, three and four-collector appliances.
Pour 100% propylene glycol USP into EnerWorks Charge Pack reservoir or into a large
clean
bucket. Add an equivalent amount of distilled or de-mineralized water and mix for a 50/50
solution by volume.
Heat transfer fluid must be a 50/50 mix by volume of Propylene Glycol USP and distilled or de-
mineralized water. Distilled or de-mineralize water is often available from grocery stores and
drugstores. This solution provides freeze protection down to -30ºF (-34ºC) and burst protection
down to -60ºF (-51ºC). If ambient temperatures at the installation location reach these
temperatures or lower, contact EnerWorks for dilution specifications.
Use of any other fluid other than a 50/50 mix by volume of 100% propylene glycol
USP and distilled or de-mineralized water is not permitted and will void the
warranty, and may lead to damage and/or risk to health and safety.
5.3 Charging Appliance with heat transfer fluid
PLEASE READ ENTIRE SECTION BEFORE PROCEEDING WITH CHARGING PROCEDURE
KEY POINTS:

Expansion tank air pressure set to 25 psi.

System fluid pressure set to 30 psi.

Air must be completely purged from system.
Collectors must remain covered until charging is complete. Uncovered collectors will
get very hot. Fluid pumped through uncovered collectors will flash boil, placing