HTP PH130-119S, Установка, эксплуатация и обслуживание

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7
F. INSPECTION OF THE SOLAR WATER HEATER
When receiving your solar water heater, inspect it for possible damage. Check markings on the rating
plate to be certain the power supply corresponds to that for which the water heater is equipped.
G. SOLAR PIPING CONNECTION
When making a connection to the heat exchangers, use Teflon tape and joint compound to prevent leaks.
The heat exchanger connections are 1” NPT. Do not apply heat directly to heat exchanger thread
connection when sweating fittings.
In closed loop glycol systems, freeze protection fluid must be non-toxic, propylene glycol, FDA rated as
GRAS. To protect the heat exchanger and other system components, regular scheduled maintenance
must be established to monitor and maintain proper heat transfer fluid pH levels.
Many heat transfer fluids are classified as toxic. Do not introduce heat transfer fluids into any fittings on
the heater except those clearly marked for that purpose.
The system components should carry temperature and pressure ratings equivalent to the design of the
solar collector. To ensure system is appropriate for installation climate, the solar collector ratings should
be verified against the collector manufacturer specifications. Collector and storage tank temperatures can
be read from the system controllers. Typical tank operating temperatures range from 40-80
o
F on the cold
supply line to the 175
o
F tank high limit. The collector temperature sensor should be 5-20
o
F higher than
the tank sensor during normal charging operation. During idle period, when there is no sun, the collector
sensor will read the ambient temperature; in full sun, the sensor will read as high as 250
o
F. Temperatures
vary depending on installation climate.
Using proper concentrations of glycol, solar systems can be operated at ambient temperatures as low as
-60
o
F. Freeze tolerance limits are based upon an assumed set of environmental conditions. Refer to the
DOWFROST specification sheet in the back of this manual for recommended concentrations.
Figure 1 - Clearances