STIEBEL ELTRON SOL 25 PLUS - Manual (Page 3)

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2. SAFETY INSTRUCTIONS
General Information
Read this entire manual. Failure to follow all the guides,
instructions and rules could cause personal injury or property
damage. Improper installation, adjustment, alteration, service and
use of this unit can result in serious injury.
This unit must be installed by a professional installer. The
installation must comply with all national, state and local plumbing
and electric codes. Proper installation is the responsibility of the
installer. Failure to comply with the installation and operating
instructions or improper use voids the warranty.
Save these instructions for future reference. Installer should leave
these instructions with the consumer.
If you have any questions regarding the installation, use or operation
of this water heater, or if you need any additional installation
manuals, please call our technical service line at 800-582-8423
(USA and Canada only). If you are calling from outside the USA or
Canada, please call USA 413-247-3380 and we will refer you to a
qualified Stiebel Eltron service representative in your area.
Safety Instructions
THIS IS THE SAFETY ALERT SYMBOL. IT IS USED TO ALERT YOU
TO POTENTIAL PERSONAL INJURY HAZARD. OBEYALLSAFETY
MESSAGES THAT FOLLOW THIS SYMBOL TO AVOID POSSIBLE INJURY OR
DEATH.
COLLECTOR WARNING: A SOLAR COLLECTOR GENERATES HEAT
FROM SUNLIGHT AND ALL OTHER TYPES OF LIGHT. THIS LEADS
TO COLLECTOR CONNECTORS GETTING VERY HOT, EVEN WHEN THEY
ARE NOT FILLED, WHICH CREATES A RISk OF BURN INJURY. COVER THE
COLLECTORS WITH OPAqUE MATERIAL UNTIL THE INSTALLATION HAS
BEEN COMPLETED. IT IS RECOMMENDED THAT YOU LEAVE THE COLLECTOR
INSIDE ITS PACkAGING UNTIL IT IS INSTALLED.
SAFETY VALVE WARNING: NEVER INSTALL ANY VALVES OR SHUT-
OFF DEVICES IN THE PIPING BETWEEN THE COLLECTORS AND THE
SAFETY VALVE. THE SAFETY VALVE IS ACTUATED AT 87 PSI PRESSURE.
NEVER SET THE SOLAR LOOP PRESSURE GREATER THAN POTABLE
(DOMESTIC) WATER SUPPLY PRESSURE. IF THE POTABLE WATER
PRESSURE IS TOO LOW, A BOOSTER PUMP MAY BE NEEDED TO ASSURE
THAT IT ExCEEDS THE REqUIRED SOLAR LOOP PRESSURE.
The solar system must not bypass auxiliary system safety devices.
Check Valve
The Flowstar pump station is equipped with two check valves to
prevent heat loss from thermo-siphoning between the storage tanks
and the solar loop and collectors.
Drain Facility
Install a drain valve at the lowest point of the system.
Expansion Tanks
The diaphragm-type expansion tanks are designed for an operating
pressure of 87 psi and are resistant to deterioration from propylene
glycol mixtures.
The air-side inlet pressure should be set to 5-7 psi less than the sys-
tem start-up (cold) pressure; check it when the system has not been
filled. This pressure must not be reduced.