Page 5
SECTION I: SPECIFICATIONS (cont .)
NOTES:
* Based on 5 GPM flow rate.
SECTION II: GENERAL INFORMATION
SOLAR WATER HEATER FUNCTION
The solar water heater is designed with an internal coil and backup electric heating element.
In lieu of an electric heating element, some models incorporate a second internal coil for
backup heating. A heating medium is passed through the solar panels and internal coil as
long as there is an adequate temperature difference between the heating medium and stored
water in the tank. The internal coil is located as close to the bottom as possible to facilitate
the transfer of heat even at lower solar panel temperatures.
During periods of water flow through the water heater, hot water is drawn from the top of
the heater and cold water is delivered to the bottom of the tank (by a diptube or bottom
inlet). If the hot water demand should exceed the solar heat output or there is an insufficient
temperature difference between the heating medium and stored water, the heating element
thermostat will activate the electrical heating element for backup heat. When an additional
internal coil is used for backup heating, an aquastat should be used for flow control in the
backup heating loop. An aquastat immersion well is supplied on SCE models.
Solar heat output from the internal coil will vary depending on outside conditions and the
temperature of the stored water.
WATER TREATmENT/FILTRATION
In areas where poor water conditions are suspected (i.e. lime, iron, and other minerals), it
is essential that the water be tested and appropriate action taken to prevent damage to the
indirect heater and ensure the quality of the water.
TT-80SCE
75
2.76/ -
14.14/ -
0.60/-
40
0.8
TT-119SCE
110
2.76/ -
14.14/ -
0.60/-
50
1.2
TT-80DC
73
2.76/1.84 14.14/9.42 0.60/0.40
-
0.8
TT-119DC
108
2.76/1.84 14.14/9.42 0.60/0.40
-
1.2
Model
Actual
Tank
Volume
(gal)
Coil
Volume
Solar/Boiler
(gal)
Coil
Surface
Area
Solar/Boiler
(ft
2
)
Coil
Friction
Loss*
Solar/Boiler
(ft.w.c.)
Electric
Heating
First
Hour
Rating
(gal)
Standby
Loss
Rating
(°F/hr)
Table 2:
Capacity & Performance
