Caleffi solar NAS200 Series, Инструкция по установке, наладке и обслуживанию

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SECTION IV: INSTALLATION
WATER CONNECTIONS
CAUTION
This water heater incorporates fittings that contain a nonmetallic lining. DO NOT apply
heat to these fittings when making sweat connections to the heater. Sweat tubing to
an adapter before securing adapter to any fittings on water heaters.
ALL PIPING SHOULD CONFORM TO LOCAL CODES AND ORDINANCES. It is highly
recommended that unions and shut-off valves are installed at the potable water and heat
exchanger connections to allow for isolation and/or movement during service. Installing a
union on the potable outlet is of particular importance to facilitate replacement of the hot
outlet/anode nipple on the 50 gallon model. In addition, all piping should be adequately
insulated with an approved material to minimize heat loss.
POTABLE WATER CONNECTIONS
THE WATER HEATER MUST BE FILLED WITH WATER BEFORE CONNECTING
ELECTRIC POWER.
1) Close the main water supply valve before continuing with the installation. After the main
water supply is shut-off, relieve the water line pressure by opening a faucet. Once the
pressure has been relieved, close the faucet. The “Cold” and “Hot” potable water connections
are labeled on the water heater. Install a union and shut-off valve at both potable water
connections. All piping should be ¾” diameter new copper or larger. A thermostatic mixing
valve or scald protection valve should be installed at the potable water outlet and used
according to the manufacturer’s specifications to prevent scalding.
2) If a backflow preventer is required in the cold water supply, a properly sized expansion
tank must be installed to control thermal expansion. Do not operate the water heater in a
closed system without installing a thermal expansion tank. Follow the expansion tank
manufacturer’s recommendations when selecting a tank for your system.
3) Following installation of the water lines, open the main water supply valve and fill the
water heater. Open several hot water faucets to relieve air from the system. After water is
flowing through the faucets and the system is void of air, close the faucets and check for
water leaks in the system.
SOLAR CONNECTIONS
CAUTION
Temperature of the primary heat source medium (from solar collector or boiler) shall
not exceed 200°F.
The outlet of the solar collector should be connected to the water heater at the “FROM
SOLAR” fitting. The fitting labeled “TO SOLAR” should be connected to the solar return
piping. It is recommended to install a union and shut-off valve at each solar connection. All
pipe and fittings between the solar system and water heater should be ¾” diameter or larger.
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