30
TWO TEMPERATURE - TWO HEATERS HIGH TEMPERATURE
WITH OR WITHOUT BUILDING RECIRCULATION
TWO TEMPERATURE - THREE HEATERS (TWO PRE-HEA TERS/ONE BOOSTER HEATER)
WITH OR WITHOUT BUILDING RECIRCULATION
MUST BE IDENTICAL HEATERS
FOR MULTIPLE HEATER INSTALLATION SEE MANIFOLD KIT
SPECIFICATIONS, PAGE 33.
CAUTION: IF BUILDING COLD WATER SUPPLY HAS A BACK-FLOW
PREVENTER, CHECK VALVE OR WATER METER WITH CHECK VALVE
PROVISIONS FOR THERMAL EXPANSION OF WATER IN THE HOT W A TER
SYSTEM MUST BE PROVIDED.
DANGER
TEMPERATURE SETTING SHOULD NOT EXCEED SAFE TEMPERATURE A T
FIXTURES. SEE WATER TEMPERATURE CONTROL W ARNING ON PAGE 4. IF
HIGHER PREHEAT TEMPERATURES ARE NECESSARY TO OBTAIN ADEQUATE
BOOSTER OUTPUT, ADD AN ANTI-SCALD VALVE FOR HOT WATER
SUPPLIED TO FIXTURES.
CAUTION: IF THE PLUMBING
REQUIRES THE USE OF PIPES
WITH DISSIMILAR MATERIAL (FOR
EXAMPLE, STEEL AND COPPER),
USE DIELECTRIC UNIONS TO
PREVENT AN ELECTRO-GALVANIC
ACTION BETWEEN THE PIPING
COMPONENTS WITH DISSIMILAR
MATERIALS.
CAUTION: IF THE PLUMBING
REQUIRES THE USE OF PIPES
WITH DISSIMILAR MATERIAL (FOR
EXAMPLE, STEEL AND COPPER),
USE DIELECTRIC UNIONS TO
PREVENT AN ELECTRO-GALVANIC
ACTION BETWEEN THE PIPING
COMPONENTS WITH DISSIMILAR
MATERIALS.