STIEBEL ELTRON SOL 27 PREMIUM W - Manual (Page 3)

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Simply the Best
INSTALLATION INSTRUCTIONS
SOL 27 PREMIUM S & W COLLECTORS - 230016 & 230017
The air-side inlet pressure should be ser to 5-7 psi less
than the system start-up (cold) pressure; check it when
the system has not been fi lled or when the wet side of the
expansion tank is open to the atmosphere.
!
WARNING: SET TING T HE MAXIMUM TANK
T EM P E R AT U R E H I G H E R T H A N 1 4 0  F AT
THE CONTROL UNIT IS PERMISSABLE ONLY WITH A
THERMOSTATICALLY-CONROLLED DHW MIXING VALVE.
OTHERWISE THERE CAN BE A RISK OF SCALDING AT THE
DRAWOFF POINT.
!
IMPORTANT: ALL SENSOR WIRING SHOULD BE
RATED FOR EXPECTED TEMPERATURES AND MUST
BE PROTECTED FROM DEGRADATION AND ELECTRICAL
INTERFERENCE. FOR MORE INFORMATION, CONSULT THE
USER MANUAL FOR THE CONTROLLER.
Solar Loop
Use only a mixture of 50% food-grade Propylene Glycol and
de-ionized water in the solar loop.
!
WARNING: FLUID MAY BE DISCHARGED AT HIGH
TEMPERATURE AND/OR PRESSURE.
NO OTHER FLUID SHALL BE USED THAT WOULD CHANGE
THE ORIGINAL CLASSIFICATION OF THE SYSTEM. UNAU-
THORIZED ALTERATIONS TO THIS SYSTEM COULD RESULT
IN A HAZARDOUS CONDITION, AND COULD VOID THE
MANUFACTURER'S WARRANTY.
Shut-down
Except for repair and/or emergency, the control unit and
the pump must remail powered and activated in order to
avoid overheating the collectors. Prior to shutting down
the system for repairs, cover the solar collectors or work at
night.
If emergency shut-down is needed, unplug the control unit
and call for service.
2 Collector Basics
The SOL 27 Premium is a highly effi cient solar thermal
collector. The net absorber surface of over 25 ft² helps result
in a maximum output og 31,300 BTU/day per panel (SRCC
clear day rating). The SOL 27 Premium also offers features
such as a highly selective absorber coating, low-iron,
tempered solar glazing, and very effective insulation around
the absorber plate. The internal fl uid tubes are copper and
the absorber plate is aluminum.
The internal fl uid tubes are organized in a "harp style"
confi guration. This consists of two headers. The top header
is split in the middle, resulting in half of the tubes directing
fl ow downward, and half directing fl ow upward.
The collector converts sunlight into heat. Light penetrates
the glass cover, which is pre-stressed, highly transparent