PROTECTION METHODS (OPTIONS FOR PROTECTION)
ELECTRIC ISOLATION The following diagram typical GARN® installation with no electrical isolation and two separate ground paths: one through the electrical panel, and one through the shows a independent ground rod of the GARN® unit (typical setup for customers prior to fall 2015 ). In the following instructions, we will build off of this diagram for explanation and illustration.
There are two options available to accomplish undirected current protection in a GARN ® unit: 1. FULL ISOLATION (RECOMMENDED) : Electrically isolate the GARN® unit from any wired ground path. That means that the GARN® tank will not be electrically connected to any wired device that is connected to power. ground. ------- OR ------- 2. SINGLE POINT GROUNDING : Have a single ground point for all wired electrical devices in electrical contact with the GARN® unit. Our recommend solution is full electric isolation (Option 1). But, depending on the installation, full electric isolation may be difficult or impossible to implement, so single point grounding (Option 2) may be the most reasonable approach.
FOR EXISTING CUSTOMERS
• Assess the overall condition of the GARN® tank. Remove any rod debris from previous anode rods, sludge, and/or sluff build-up on the bottom of the tank. If there is build-up that cannot be easily removed while the tank is filled (in service), now is a good time to drain the unit, clean it, and refill it with fresh water and chemical. • Electrically isolate the tank following the steps outlined in the following sections.
All electrical work must be completed by a licensed electrician in compliance with all Federal, State, and local codes. IF ELECTRIC HEATING ELEMENTS ARE INSTALLED When electric heating elements are installed, single point grounding must be used, but specific grounding procedures must be followed. Skip to the appropriate section. LOW VOLTAGE SENSORS Low voltage sensors do not need isolation accommodations as these sensors are almost
FOR NEW CUSTOMERS
• Anode rods will no longer be supplied with a GARN® unit. Electric isolation is required as part of installation. Follow the steps in the following sections.
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GARN® WHS 1000 and WHS 2000 Manual | © HY-C® Company LLC | October 2024
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