VIII) COMBINATION POTABLE WATER HEATING AND SPACE HEATING (COMBO HEATING)

This section serves as a guide for the installation and use of “Combo” heating systems utilizing a domestic water heater which has been specifically approved for such use. It is written for those knowledgeable in the required trades and professionals involved in the design and installation of Combo Heating Systems.

It is the responsibility of the installer/ designer to follow all applicable codes to ensure the effectiveness and safety of the installation.

Caution: READ BEFORE PROCEEDING

The following requirements must be met for the installation of Combo Heating Systems:

1.All components used for the distribution of water in the heating loop must be suitable for potable water. These include all piping, fittings, solder and fluxes, pumps for circulation of water, valves, etc.

2.The water heater must not be connected to a

hydronic heating system that has been used previously.

3.No boiler treatment chemicals of any kind shall be introduced into the system.

4.The Combo System components must be selected and sized to meet and maintain the total calculated demands for both domestic service hot water and

space heating requirement. The sizing and installation must be performed in accordance with good engineering practice such as ASHRAE Handbooks, HRAI, Hydronics Institute Manuals, CGA B149, NFPA 54, ANSI Z223.1, CSA F280, National/Provincial Building Codes, CSA C22.1, ANSI/NFPA 70, CSA B51 and/or codes having jurisdiction.

5.The air handler (fan coil) and/or the circulating pump in a baseboard hydronic loop will require a dedicated 120V circuit. This must be provided and identified for this purpose.

6.All piping between the water heater and the air handler or hydronic baseboard loop must be adequately insulated to reduce heat loss.

7.If local jurisdiction require a back-flow preventer in the cold water line, an expansion tank of adequate size must be installed.

8.To reduce the scald hazard potential, a mixing valve must be installed.

INSTALLATION

The installation of the water heater must follow sections I to X in this manual. The heating mode may be one of the following options:

A- A fan coil (air handler)

B- A hydronic baseboard (finned tube) loop/ In floor heating

A- Fan Coil (see figure 13)

The following is a list of requirements for the installation of the heating loop to the water heater.

1)Install shut-off valves and unions so that the water heater can be isolated from the heating module should servicing of the water heater become necessary.

2)Install a drain valve at the lowest point of the heating loop so that water can be drained from the heating module without affecting the water heater.

3)If the air handler does not have a venting means at the highest point of the piping arrangement, install an air bleed at the highest point of the plumbing arrangement.

B- Baseboard Radiator Heating (see figure 13)

The following is a list of requirements for the installation of the heating loop to the water heater.

1)Install shut-off valves and unions so that the water heater can be isolated from the heating module should servicing of the water heater become necessary.

2)A drain valve must be installed at the lowest point of the heating loop so that water can be drained from the heating module without affecting the water heater.

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GSW POWER VENTED GAS FIRED WATER HEATER operating instructions Installation
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POWER VENTED GAS FIRED WATER HEATER specifications

The GSW Power Vented Gas Fired Water Heater is a robust and reliable choice for households seeking efficient hot water solutions. Renowned for its innovation and performance, this water heater is engineered to provide an uninterrupted supply of hot water while ensuring safety and energy efficiency.

One of the standout features of the GSW Power Vented model is its power venting technology. This system utilizes a blower motor to expel combustion gases from the tank, allowing for flexible installation options. Homeowners can position the unit in basements, attics, or any area with limited venting options without compromising safety or efficiency. The advanced power venting system also significantly reduces backdraft issues that are common in traditional venting systems.

The water heater boasts high energy efficiency ratings, which translates into lower utility bills. This is achieved through its durable insulation and innovative heat-trapping design. The GSW Power Vented water heater features a unique heat exchanger that maximizes heat transfer while minimizing heat loss. This means that less energy is required to heat the water, making it not only environmentally friendly but also cost-effective over the long term.

Safety is paramount with the GSW Power Vented Gas Fired Water Heater. It is equipped with a robust flammable vapor sensor technology that detects flammable vapors near the heater, ensuring that the unit operates safely in areas where flammable materials may be present. Additionally, the water heater is designed with a reliable thermostat that maintains the desired water temperature while preventing overheating.

Another key characteristic of this water heater is its impressive recovery rate. With the ability to heat large quantities of water quickly, it supports multiple fixtures and appliances simultaneously, making it an excellent choice for families with higher hot water demands.

Furthermore, GSW offers various capacity options to cater to different household sizes and needs. Whether you are upgrading your current water heating solution or installing one in a new home, the GSW Power Vented Gas Fired Water Heater provides essential features that ensure convenience, efficiency, and safety. With its combination of innovative technologies and practical design, it stands out as a reliable and effective choice for today’s homeowners seeking hot water solutions.
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