Free Hot Water Freedom 5002, Инструкция по установке, эксплуатации и обслуживанию

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Page 38
Installing the Expansion Tank
• Follow all instructions and local codes during the installing of this product.
• Tanks are pre-charged to 12psi (83 kPa) and should be charged to the system pressure
prior to installation in the system.
Caution: Do not exceed the maximum pressure rating of the tank.
After installing the ETX/ETSX 2.1 Expansion Tank
• Fill system. Vent air from system.
• Fire the burner to bring system to design temperature.
• After initial venting of air, additional air will vent as water is heated.
• Check system pressure after water is heated. If pressure is too high, drain water from boiler and adjust feed water
pressure regulator (typically 12psi) (83 kPa).
Service Hints
1. If the system pressure is too high:
a. Check gauge calibration.
b. Check to see if the ETX/ETSX tank has lost its air charge.
Note: To get an accurate reading when checking ETX/ETSX tank air pressure with any tire gauge, disconnect
the tank
from the system.
c. Check for faulty fill valve operation. First close manual shutoff located before the fill-valve, then draw
system pressure down to 12psi (83 kPa) (or other preset pressure) and observe system for pressure buildup
several hours later.
d. Check for service water entering system from any other source such as a defective tank less heater. Use
same procedure as above after shutting off possible water source.
2. If pressure relief valve drips water:
a. First, check system pressure. If too high, follow steps
1.a, b, c, and d above.
b. If pressure relief valve continues to drip water, even at reduced pressure, flush relief valve by quickly
raising lever several times. If drip continues, replace relief valve. (see caution below)
c. If multiple ETX/ETSX tanks are installed in the system, check pressure of each for possible air leaks. Be
sure air valve caps are on tight.
Caution: Relief valve will discharge hot water, therefore precautions must be taken to
avoid scalding injury or water damage. A proper drain line connected to the valve outlet
and run to a safe place of disposal must be installed.
Expansion Tank Quick Sizing Chart - Watts ETX-15 - 2.1 gallon
Watts Expansion Tank recommendations (Net BTU/Hour 20,000 to 30,000 – Tank ETX-15 – 2.1 gallons)
2 collector 7000 series BTU/H 11,360 BTU’s
3 collector 7000 series BTU/H 17,040 BTU’s