Care and cleaning of the water heater:

Draining the Water Heater

∞F

To Hot Water

Faucet(s)

Draining the water heater

WARNING: Failure to follow these instructions while draining the water heater can cause serious damage to the water heater as well as personal injury, including scalding.

CAUTION:

Below are instructions for draining water out of the water heater.

Turn off the switch on the remote control.

Close the gas shut-off valve(s).

Unplug the power supply cord (or disconnect breaker) at least 10 seconds after step #1.

Open all hot water faucets. Before proceeding to the next step, make sure that COLD water is coming out of all hot water faucets.

Close the water shut-off valve.

Using a suitable container to catch water, remove the water filter from heater. Attach a garden hose to the drain valve installed in the hot water outlet line and direct the

Optional Maintenance Method

Isolator valve kits may be purchased as optional items from manufacturer, distributor or place of purchase. They allow for one person full

stream of water to a suitable drain where it will cause no damage. Leave water heater as is until next use.

To put the water heater back into operation after draining, follow the steps below.

Reinstall the drain plug and water filter. Close the hot water outlet drain valve.

Open the water shut-off valve and close again after making sure that water comes out from hot water faucets. (This step is to remove air from the water lines.)

Plug into an electrical outlet, fully open the gas shut-off valve and the water shut-off valve.

NOTICE: The water heater may not operate unless the above procedure is followed correctly.

diagnostic testing and ease of flushing the system.

The kit includes two full port isolation valves, one for the cold side and one for the hot side.

Even when drained properly, a small amount of water will remain in the water heater. In cold weather, conditions this water can freeze. If this happens allow the defrost protection on the heater at least 30 minutes to melt the frozen water or the water heater may not work properly.

Hot Water Service Valve

Pressure Relief Valve

Drain

Water Outlet

Cold Water Service

Valve

Water Inlet

WARNING: Failure to drain the water heater can cause serious damage to the water heater as well as personal injury.

NOTICE: DO NOT unplug the electric power supply cord for freeze protection.

Freeze Protection

Where the water heater may be exposed to freezing conditions, even for a short period of time, be sure to drain all water from the unit as instructed above.

Exposure to freezing conditions can occur from down draft of venting system or from installation in areas exposed to cold air.

The water heater is equipped with a Freeze Protection Electric Heater. As long as electricity is supplied to the water heater, it prevents freezing inside the water heater down to an ambient temperature of approximately minus 20°F (-28°C) (without wind conditions).

This device only protects the internal components of the water heater. It does NOT protect piping and valves. Therefore, piping and valves should be wrapped with insulation material as instructed on page 24.

Another method of freeze prevention is by running a small volume of water. Running water will protect the water heater, piping and valves.

Follow the steps below to ensure proper water flow through the water heater and piping:

Turn off the switch on the remote control.

Close the gas shut-off valve.

Open the hot water faucet slightly until a stream of approximately 1/8” (.32 cm) is flowing. Be sure to check the flow periodically.

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Rheem RMTG2-42(PVN)(PVP), PTG2-42(PVN)(PVP), PH-16(FISN)(FISP) warranty Draining the Water Heater, Freeze Protection
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RUTG2-42(PVN)(PVP), RUTG2-53-(PVN)(PVP)(XN)(XP), RTG2-53-(PVN)(PVP)(XN)(XP), PH-16(FISN)(FISP), RMTG2-53-(PVN)(PVP)(XN)(XP) specifications

Rheem’s innovative line of tankless water heaters, including the PTG2-42(PVN)(PVP), RTG2-42(PVN)(PVP), PH20R-(IFSN)(IFSP)(OFN)(OFP), RMTG2-42(PVN)(PVP), and RMTG2-53-(PVN)(PVP)(XN)(XP), represents a significant advancement in residential and commercial water heating technologies. These models are designed to deliver hot water on demand, ensuring efficiency and convenience while minimizing energy consumption.

One of the standout features of these Rheem models is their energy efficiency. Employing advanced condensing technology, they are capable of converting up to 98% of the energy consumed into hot water. This impressive efficiency reduces utility bills and makes them an environmentally friendly choice compared to traditional tank water heaters.

The PTG2 and RTG2 series are particularly versatile, accommodating various installation needs. Their compact design allows for both indoor and outdoor installation, making them ideal for homes with limited space. Additionally, they are equipped with a multiple venting option, which provides flexibility in installation locations.

The PH20R series incorporates Rheem’s proprietary modeling and simulation technologies to optimize performance. These models feature enhanced safety functions and user-friendly digital controls, allowing homeowners to easily set and monitor their water temperatures. The ease of use extends to maintenance as well, as many components are accessible for routine checks and cleaning.

Another significant advantage of the RMTG2 models is their integrated Wi-Fi connectivity, enabling users to manage their water heating systems remotely through Rheem’s mobile app. This smart technology provides real-time data, alerts, and allows for temperature adjustments, ensuring that users always have hot water when they need it.

Rheem’s tankless water heaters also boast a robust warranty, a testament to their durability and reliability. With options that cater to various household sizes and hot water needs, these models can provide continuous hot water for homes with multiple bathrooms and heavy consumption.

For those seeking cost-effective, efficient, and smart water heating solutions, the Rheem PTG2, RTG2, PH20R, RMTG2-42, and RMTG2-53 series stand out as top contenders in the market. Their combination of advanced technology, energy savings, and user-friendly features position them as industry leaders, providing long-term benefits for any homeowner.
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