Eccotemp 7GB Series - User Manual

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

The 7GB Builder Series Outdoor Manual describes a whole-home tankless hot water heater designed for outdoor, permanent installations. This manual covers installation, use, and care instructions for both LP (Liquid Propane) and NG (Natural Gas) models.

Function Description:

The Eccotemp 7GB Builder Series is a forced-type gas tankless water heater designed to provide instant, on-demand hot water for an entire home. It operates by heating water as it flows through the unit, eliminating the need for a storage tank. The unit features a draught fan that forces waste gas outside, ensuring efficient and safe operation. It is specifically designed for outdoor installations, with a rain-proof design to protect internal components from the elements. The water heater is equipped with an electronic ignition device that automatically lights the burner when hot water is called for. A temperature control system coordinates water, electricity, and gas to maintain a consistent outlet water temperature. The unit also includes flame-out protection, which automatically cuts off the gas supply if the flame extinguishes unexpectedly, preventing gas leaks.

Important Technical Specifications:

The 7GB models (7GB-LP and 7GB-NG) have a maximum input rating of 180,000 BTU per hour and a minimum input rating of 17,000 BTU per hour.

7GB-LP (Liquid Propane):
- Minimum Inlet Gas Pressure: 8.0" W.C. (1.99 kPa)
- Maximum Inlet Gas Pressure: 13.0" W.C. (3.23 kPa)
- Manifold Pressure: 6.59" W.C. (1.64 kPa)
7GB-NG (Natural Gas):
- Minimum Inlet Gas Pressure: 3.49" W.C. (0.87 kPa)
- Maximum Inlet Gas Pressure: 10.48" W.C. (2.61 kPa)
- Manifold Pressure: 3.41" W.C. (0.85 kPa)

Both models operate on 120 Volts, 60 Hz, with an amperage of 12A. The maximum working pressure is 150 PSI. The flow rate at a 45°F temperature rise is 6.87 GPM, with an activation flow rate of 0.55 GPM. The venting type is forced direct exhaust, and ignition is electric. Connection sizes for water and gas are 3/4" NPT. The rated power supply is 54 Watts / 0.61 Amps. Product dimensions are 26.2 x 17.1 x 7.3 inches, with a net weight of 40.6 lbs and a gross weight of 46.6 lbs. The unit is designed for wall-hung installation.

Usage Features:

The water heater is controlled via a remote control, which allows users to adjust the set temperature and displays error codes. Up to three remote controllers can be installed, with a "priority" function that allows the first activated controller to adjust the temperature. The remote controller can adjust the output temperature from 95°F (35°C) to 158°F (70°C) in one-degree increments. The factory recommended operating temperatures are between 90°F and 140°F. For safety, especially in households with small children, disabled, or elderly persons, a 120°F or lower temperature setting is recommended. The unit features an automatic draining function that activates if the water inlet pressure exceeds 145-174 psi, preventing damage from high pressure. It also has a low start-up water pressure requirement. The manual emphasizes that the unit is for outdoor permanent installations only and must not be installed indoors or in confined spaces. Clearances from combustible materials and other appliances must be maintained as specified in the manual.

Maintenance Features:

Regular maintenance is crucial for extending the water heater's lifetime. The manual recommends checking the unit at least once a year by a licensed technician. Key maintenance tasks include:

Cleaning the cold-water inlet filter: This involves turning off the water inlet supply valve, opening a hot water tap to release line pressure, unscrewing the filter by turning counter-clockwise, cleaning it with a tiny brush to remove debris, and reinserting it.
Draining the unit: This is necessary for anti-freezing protection and involves closing the manual gas shut-off valve, turning off the power supply, opening all hot water taps in the house to drain residual water, and then unscrewing the drain plugs to completely drain the unit.
Checking for obstructions: All openings for combustion air and exhaust must be clear of obstructions.
Inspecting the flue terminal: This should be done at initial start-up and at least annually.
Checking the pressure relief valve: The user must check the relief valve at least once a year. This involves turning off power and gas, turning on the water inlet switch to create pressure, and gently opening the relief valve handle until water comes out. If no water comes out, the valve is invalid and support should be contacted.
Anti-freezing protection: The unit has built-in freeze protection for internal pipes and the heat exchanger, but external pipes require proper insulation. During power outages, the built-in freeze protection will not be active, requiring manual draining if freezing conditions are expected. Eccotemp recommends termination hoods have a backflow preventer to assist with freezing air.
Gas leak testing: After gas connections are completed, a leak test should be performed using soapy water or a gas leak detection device.

The manual also includes a troubleshooting guide for common issues such as insufficient hot water, fluctuating temperature, and error codes displayed on the remote controller. It provides a list of PCB error codes with their descriptions and handling methods.