Lochinvar 000 through 2, 1 warranty Water Treatment, Heating Boiler Installations

(d)Drain the unit completely. Remove the caps from the two drains located on the rear of the appliance. Open the relief valve and manually open the bypass valve to allow air into the system so the water will drain out. Open the union fitting on the inlet so water can be drained from the secondary heat exchanger.

(e)Ensure that the pump, bypass piping and connecting piping are fully drained.

FREEZE PROTECTION FOR A HEATING BOILER SYSTEM (If Required)

1.Use only properly diluted inhibited glycol antifreeze designed for hydronic systems. Inhibited propylene glycol is recommended for systems where incidental contact with drinking water or any potable water is possible.

CAUTION￿

DO NOT use undiluted or automotive type antifreeze.

2.A solution of 50% antifreeze will provide maximum protection of approximately -30°F.

3.Follow the instructions from the antifreeze manufacturer. Quantity of antifreeze required is based on total system volume including expansion tank volume.

4.Glycol is denser than water and changes the viscosity of the system. The addition of glycol will decrease heat transfer and increase frictional loss in the boiler and related piping. An increased flow rate through the boiler heat exchanger may be required to achieve proper heat transfer rates in a glycol system. Reduced flow in a boiler due to a high percentage of glycol in the system may result in boiler noise or flashing to steam.

5.Local codes may require a back flow preventer or actual disconnect from city water supply when antifreeze is added to the system.

WATER TREATMENT

WARNING￿

DO NOT attempt to fire this appliance without completely filling the heat exchangers, bypass and all related system piping. Ensure that all air is properly bled from the system before firing. Failure to properly fill the boiler and related piping before firing may result in personal injury or non- warrantable property damage.

HEATING BOILER INSTALLATIONS

PIPING OF THE BOILER SYSTEM

The drawings in this section show typical boiler piping installations. This boiler MUST always be installed in a primary/secondary piping system for proper operation. Before beginning the installation, consult local codes for specific plumbing requirements. The installation should provide unions and valves at the inlet and outlet of the boiler so it can be isolated for service. An air separation device must be supplied in the installation piping to eliminate trapped air in the system. Locate a system air vent at the highest point in the system. The system must also have a properly sized expansion tank installed. Typically, an air charged diaphragm-type expansion tank is used. The expansion tank must be installed close to the boiler and on the suction side of the system pump (Boiler Inlet) to ensure proper operation. Caution: This boiler system should not be operated at less than 12 PSIG. Hot water piping must be supported by suitable hangers or floor stands, NOT by the boiler. Copper pipe systems will be subject to considerable expansion and contraction. Rigid pipe hangers could allow the pipe to slide in the hanger resulting in noise transmitted into the system. Padding is recommended on rigid hangers installed with a copper system. The boiler pressure relief valve must be piped to a suitable floor drain. See the relief valve section in the In- stallation and Service Manual.

CAUTION￿

A leak in a boiler “system” will cause the “system” to intake fresh water constantly, which will cause the tubes to accumulate a line/scale build up. This will cause a NON-

WARRANTABLE FAILURE.

WATER CONNECTIONS

HEATING BOILERS ONLY

In hard water areas, water treatment should be used to reduce the introduction of minerals to the system. Minerals in the water can collect in the heat exchanger tubes and cause noise on operation. Excessive build up of minerals in the heat exchanger can cause a non-warrantable failure.

All boilers have 3 inch (76.2mm) copper pipe inlet and outlet connections. Installed piping to and from the boiler must be a minimum of 3 inches (76.2mm) diameter and must not exceed the maximum specified piping length. Caution: Field installed reducing bushings must not be used. Any reduction in pipesize may decrease flow resulting in high water temperatures, boiler noise, flashing to steam and non-warrantable heat exchanger damage.

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