Heat Exchanger
These instructions are for replacing the lower (primary) heat exchanger or the upper (secondary) heat exchanger.
1. Turn off gas supply.
2. Turn off water supply. Drain all water from the
appliance.
3. Turn off 120V power supply.
4. Remove four screws securing the front panel.
Remove front panel.
Remove gas manifold
5. Disconnect high tension cord from electrode.
6. Disconnect flame rod wires. (yellow and red)
7. Remove the three machine screws where manifold
meets gas valve. Then remove six screws from
manifold.
8. Disconnect ignitor module harness, mounted on
manifold. (gray/gray)
9. Disconnect the two solenoid wire harnesses at
bottom of manifold. Remove manifold plate.
Flame Rod
Connectors
(Step 6)
Manifold
(Step 7)
Ignitor
(Step 5, 8)
Solenoid
connectors
(Step 9)
Drain pipe clip
(Step 17)
Water outlet
(Step 15)
Condensing Water Heater Service Manual
10. Remove eight screws for the combustion chamber
sight glass plate. Remove plate.
11. Remove two screws attaching the burner to the heat
exchanger. Pull out the burner.
Remove fan
12. Disconnect fan harness.
13. Remove two screws from fan assembly.
14. Remove fan.
Disconnect water lines
15. Remove one screw from hot water line bracket.
Remove bracket by rotating and moving it up toward
the bend in the tube where the diameter is smaller.
16. Remove two screws and two brackets at by-pass
valve assembly.
17. Remove clips from drain connecting pipe. Remove
drain connecting pipe.
31
RC80HPe
Combustion
chamber
sight glass
plate
(Step 10)
Fan
(Steps 12-14)
Machine
screws
(Step 7)
By-pass
valve
(Step 16)
100000354
Heat Exchanger Kit for R94LSi Heat Exchanger, 2532FFU and R85 Tankless Water Heaters
Part #R104000030K | Item #7605374 | Manufacturer Part #104000030-K
$363.59 EACH
Brand Model Compatibility:
R94LSiN Tankless Water Heaters
Packaging Info:
- Quantity Per
- Each: 1,
- Inner pack: 1
How to get it:
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Product Details
Documents
Specifications
Brand Model Compatibility: R94LSiN Tankless Water Heaters
Product Type: Heat Exchanger Kit
Lots of tankless myths are being spread by people unfamiliar with this technology. Luckily, Matt Risinger is here to strip away these misconceptions. Matt Risinger is a nationally recognized expert in building science and high-performance construction. The perfect person to debunk these myths and explain why going tankless means saving space, better efficiency, greater longevity, and most importantly, never running out of hot water.
Myth #1
Tankless doesn’t work with cold inlet temperatures.
This is simply not true. With around 100,000 tankless water heaters sold per year in Canada, our water heaters handle cold groundwater easily. The Tankless Truth™ is our water heaters will deliver 5-gallons per minute with 40-degree groundwater, equal to running three showers simultaneously.
Myth #2
Tankless water heaters are both expensive and expensive to install.
In the past few years, the price of tanks has gone up and up. In fact, today you can get a non-condensing tankless water heater for the same or less cost as a tank. And a good plumber who knows what they’re doing can often install these in the same amount of time as a standard tank. The Tankless Truth is that the cost of installing a tankless water heater can be the same or less than a tank.
Myth #3
Venting is too expensive on tankless water heaters.
We offer affordable concentric venting, including 2″ by 4″ diameter for condensing & 3″ by 5″ diameter for non-condensing. Concentric vents are beneficial because they require just one penetration through a nearby roof or wall. Additionally our condensing tankless water heaters can use 2″ pvc for vent runs up to 65′ and in some cases can use room air for intake.The Tankless Truth is we’ve made venting affordable.
Myth #4
Tankless is more expensive to maintain than tanks.
It doesn’t matter if you have a tank or tankless water heater, your water heater must be maintained. In fact, scale will build up to a foot or thicker inside a tank in just a decade. Tank and tankless manufactures both recommend regular flushing. This is a simple process that can be handled by the homeowner, or their trusted plumber. The Tankless Truth is that tankless water heaters are not more expensive to maintain than a tank.
Myth #5
Tankless water heaters are slow to respond quickly to high demand.
The speed of hot water coming to your faucet isn’t determined by whether you have a tank or a tankless water heater. Instead it is determined by the distance between your water heater and your fixture. Thankfully, we have a solution for that. The Tankless Truth is we offer tankless water heaters with built-in circulation pumps that deliver hot water to your fixtures quickly and efficiently.
Myth #6
Stainless steel heat exchangers are better.
Some manufacturers only use stainless steel heat exchangers in their tankless water heaters. At Rinnai, we use stainless steel in our condensing models due to the corrosive nature of condensation produced by extra high efficiency tankless water heaters. But, in our non- condensing models, we use copper heat exchangers because they are a much better conductor of heat. The Tankless Truth is that stainless steel is not always the best material to use for your tankless water heater’s heat exchanger.
Myth #7
Tankless means upgrading your gas line.
When going from a tank to tankless, there is a myth that says you always need to upgrade the gas supply line. This isn’t always the case. Rinnai condensing tankless water heaters’ zero governor gas valve, switching venturi, and turbo fan work together to pull in the right mixture of gas and air to produce an energy efficient combustion. This allows the tankless water heater to self-compensate for any fluctuations in gas or air supply. The Tankless Truth is, in many cases, you don’t always need to upgrade your gas supply line when going tankless.
Myth #8
Tankless is a new tech that is unproven.
Rinnai has been selling tankless water heaters in the US since the 1990s. But, for decades prior, they have been selling tankless in Japan and other parts of the world. Since being introduced to North America, tankless has seen double-digit growth. The Tankless Truth is that our tankless water heaters last up to two decades while many tanks are getting replaced in 8-12 years.
Tankless is
here to stay.