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Ultra 155 - 123,000 BTU Output High Efficiency Boiler (Nat Gas or LP)
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MANUALS (10)
Replacement Parts
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Product Highlights
Description
Note: Product Title reflects this boiler's IBR Net Output Rating
Propane Conversion Orifice included for LP Gas Applications
Easy-up Manifold Installation Options:
The Ultra Easy-Up Manifold Kit can speed up installation of the primary/secondary piping required on Ultra boilers. Weil-McLain's Easy-Up manifold kit is designed by the boiler manufacturer and provides the added feature of optional indirect water heater connections.
Key Features
- Gas fired water boiler with cast aluminum heat exchanger
- Venturi mixing body mixes air and gas providing higher efficiency
- Designed to operate in low temperature condensing applications
- Outdoor reset and domestic hot water priority standard
- Negative regulated gas valve precisely delivers gas to the boiler
- Electronic control module automatically adjusts blower speed and gas flow rate in response to environment
- Modulates with 5 to 1 turndown ratio
- Variable speed motor matches combustion output to heating needs
- High grade stainless steel burner features quiet operation, high efficiency, and cleaner combustion for low NOx applications.
Specs
| Width (Inches): | 22-13/16" |
|---|---|
| Fuel Type: | Propane Natural Gas |
| Vent Type: | Direct Vent AL29-4C PVC |
| Boiler Type: | High Efficiency |
| Color: | Slate Gray |
| Efficiency: | 94% |
| System Type: | Hydronic (Water) |
| Features: | Condensing Direct Vent EI/Spark Ignition |
| Vent Size: | 3" |
| Water Connection: | 1" |
| Gas Connection: | 1/2" |
| BTU Input: | 155000 |
| DOE Rating: | 139000 |
| IBR Rating: | 123000 |
| Warranty: | 15 Year Limited (Heat Exchanger), 1 Year (Parts) |
| Depth (Inches): | 19-15/16" |
| Height (Inches): | 43.0625" |
Questions?
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Replacement Parts
SKU: 383-500-723
Brand: Weil-McLain
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Product Reviews
Most Liked Positive Review
Great UNIT A+
Most Liked Negative Review
Horrible boiler
Worst boiler ever
Low reliability
Horrible boiler
Great UNIT A+
I am impresses
I install this boiler every chance I can
Exactly what i expected
High-Efficiency, Low Reliability Boiler
Great Investment
Great set up , easy install
Product Q&A
19 QuestionsQ: Can I use my existing chimney so I don't have to cut a hole in the wall for pvc,also do you guys have a finance option for purchase
Asked by Woody 9 years ago
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Verified Reply- SupplyHouse StaffIf used, a masonry chimney can ONLY be used as a PIPE CHASE for vent and air pipes — The vent and air piping must be installed as instructed in this manual and all joints must be sealed. The chimney must be used only for Ultra boilers. NO OTHER appliance or fireplace can be connected to the chimney. The chimney must be straight, with no offsets, and the vent and air piping materials must comply with this instruction manual. The chimney must be fitted with a sealed access opening, through which the interior of the chimney can be inspected. The chimney (and liner, if installed) must be inspected at least once annually to verify condition. Failure to comply could result in severe personal injury, death or substantial property damage. That is straight out of the venting section of the install. You may want to take a look at that http://s3.supplyhouse.com/product_files/Weil%20Mclain%20-%20383-500-723%20-%20Install%20Instructions%20(Venting).pdf We do not have any finance options unfortunately. You would have to pay for the unit in full before we ship it out to you.
Q: Can this boiler be installed in a crawl space on a concrete pad. My crawl is about 4.5' high.I want to install baseboard heat in my 1900 sq ft ranch using slant fin multi pack 80
Asked by country boy 11 years ago
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Verified Reply- Supplyhouse Staffyou would need to consult an installer and check building codes.
Q: Is the on-board boiler controls able to do multiple zones? If so how many? If not, is there any integration with products like tekmar or do we need to utilize tekmar boiler controls and a zone module.?
Asked by none 12 years ago
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Verified Reply- Supplyhouse StaffYes this boiler can do up to 3 zones with its built in controls. A tekmar zoning system can be used if more than 3 zones is needed.
Q: Outdoor reset & domestic Priority standard???Explain please Does the boiler have a built in Low h2o cut off?? Does it come with nuetralizer for condensate ??
Asked by Wannabe 13 years ago
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Verified Reply- PexSupply StaffThe boiler does not come with a low-water cutoff or condensate neutralization kit, but these can be purchased separately. Outdoor reset technology allows the boiler to save energy by producing lower water temperatures when outdoor temperatures are warmer. Priority refers to its capability to have a zone for an indirect water heater that takes precedence over all the space heating zones.
I'm not sure about outdoor reset. It measures outdoor temperature to determine how hot to make the water. At warmer outdoor temperatures it fires a a lower rate to burn longer and more efficiently. Domestic priority is for homes that have their domestic hot water on a tank off the boiler. If there is high demand for both heat and high demand for hot water, the hot water zone gets the heat first. There is a low water cut off. Condensate just drains out the side. You have to make your own arrangements for collecting it. For the first year I used a coffee can and a 6 year old boy. Now we have a float operated pump. It came with a water treatment kit for the boiler water. Willy Spurr
Q: This is for use with natural gas correct
Asked by Roger 13 years ago
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Yes. Natural Gas. Sent from Lisa's iPhone
Yes Sent from my iPhone
The boiler comes set up for natural gas and can be converted to propane with the supplied kit.
Yes. The Ultra 155 uses natural gas. I believe there are some that use propane so just make sure when ordering that you order natural gas. FYI: I installed mine last year and the electronic menu screen made it well worth it!
Q: Can i use glycol with this boiler and if so what type is required?
Asked by rispurge 14 years ago
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Verified Reply- PexSupply StaffThis boiler works with most propylene glycol in concentrations up to 50%.
it is better to use an exchanger,wm is very specific about what kind of glycol you can use,if any.
Yes you can use glycol in a boiler. You need to contact the manufacture for the rate per gallon of water. Glycol well also reduce the BTU's that your boiler well produce. So you may want to increase your boiler size.
I do not recall if you can use a glycol mix. Though if you check the site, the entire manual is available. I recommend reading it all the way through, before buying. You'll fell better about installing it if you do.
Q: what comes in the box? Do i need an expansion tank?
Asked by Kez 14 years ago
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the expantion tank is seprate, so are any other external parts that you will need to have if your replaceing an entire system.
Yes you do need to buy one Sent via BlackBerry by AT&T
yes you do need a expansion tank as for what comes in the box the unit the main water pump and the outside vents and sencers for the unit supply return and outside as well As for the tank I am still having some problem with that as to size
Q: what is the recommended cirulator pump for this model if used in 5 zone valves, all cast iron radiator, approx 2700 sq ft house.
Asked by ren 14 years ago
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Verified Reply- PexSupply StaffThis boiler includes a 0014 boiler circulator. The size of the system circulator depends on the flow rate and head pressure in the system.
Tako 008 for ultra & 0014 for house
Q: I wanted to use the wall mount kit with this boiler but the manual says minimum 2 feet vent pipe and 2 elbows to use the included termination kit since it will be mounted to an outside wall it will have 3' vertical and 18" horizontal pipe for vent and the same for intake air. will this be acceptable? the picture in the manual only shows 1 elbow on the vent and 1 on the intake.
Asked by Tom 15 years ago
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Verified Reply- PexSupply StaffYes, your setup will work just fine.
Q: If you have 3 zone valves does this boiler need two cir pumps Im told it does
Asked by 15 years ago
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Verified Reply- PexSupply StaffThe boiler will have to be piped primary/secondary. You will have a primary (boiler) circulator and a secondary (system) circulator. The boiler comes with the primary circulator. You will need a secondary circulator.