Navien Services

Navien annual Service

Navien combi boiler and water heater annual service includes:
– Flushing of the space heating heat exchanger which is what heats up the water that goes through your baseboard’s to heat your home. This is done with a descaling chemical. After pumping the chemical in a loop from a bucket through the system then back into the bucket for a certain amount of time we then shut off the pump and the valves putting them back the way they were when in normal operation.

–  Flushing of the plate heat exchanger which is responsible for heating up your domestic hot water for your shower, faucets etc. This is done with a descaling chemical. After pumping the chemical in a loop from a bucket through the system then back into the bucket for a certain amount of time we then drop the pump into a clean bucket of just water to flush the chemical out of the system.

– Clean domestic hot water filter

– Clean air intake filter screen

– Clean Condensate trap

– Remove cartridge from NaviClean magnetic filter and clean off debris thoroughly. Reinstall cartridge and pressurize filter housing.( This is done only if NaviClean magnetic filter is installed on the system )

– Clean filter on space heating piping

– Turn all valves back on. Power up Navien and let it run for a few minutes so the Navien can let us know if there is any air in the system.

– . We then start and test the system. First testing the space heating making sure all heating zones are working. Then we test the domestic hot water making sure it turns on and off when its supposed to. Make any temperature setting adjustments if needed.

The Navien Manifold is required when performing the flushing of the heat exchangers with descaling chemical. Navien highly recommends this is done yearly by a skilled heating technician. Sometimes installers leave this out to save money on the installation so that they can either make more profit or so that they can offer the customer a lower install price without the customer knowing that they are cutting corners on important parts that are needed on the installation.  

This manifold has shut offs to isolate the heat exchanger and hose connections to hook up a pump and a discharge hose. This is so that a descaling chemical can be pumped directly into the Heat Exchanger and then back out with out going through the rest of your heating system. Because the unit condensates is causes scale build up inside the heat exchangers. This scale is what causes corrosion from the inside out. When the unit starts to scale really bad you will see a white crust at the seems and this scale will also destroy all sensors and mechanical moving valves like your 3-way valve. This is why Navien highly recommends this service is done annually to protect your Navien equipment. When you have a Navien Combi you have two heat exchangers. One is for your space heating and the other is for your domestic hot water. The space heating one is the larger of the two and needs to be flushed longer.

Without this Navien manifold this service of flushing the heat exchangers with descaling chemicals can not be done. This is why its important to find out if you have the manifold or you can also have valves and hose connections installed on the piping by a licensed professional. This service should be done on any high efficiency equipment that condensates weather its Navien or not.

If you do not have this manifold or the valves and hose connections and have never had this service done with your equipment then contact us if you would like to start properly maintaining your equipment so it lasts 10x longer then when you are not properly maintaining it. Contact us through the live chat by clicking the bubble in the bottom right corner of this screen or call us any time at 401-588-9794 or email us at Vinny@KwikPlumbingRI.com.

Navien’s NCB-H generates enough hot water to run up to 3 showers and a dishwasher at the same time.