ALPHA 15-55 F/LC Cast Iron Circulator Pump (w/ Line Cord) Zoom

ALPHA 15-55 F/LC Cast Iron Circulator Pump (w/ Line Cord)

SKU:59896832

Brand: Grundfos

Grundfos
Qty Price
$159.95
/ each
$463.35 / box (3 units x $154.45)
In Stock! Ships in 24-48 Hours
(82 Available)
3

Specs

Application: Zoning
Material: Cast Iron
Horse Power:
?
1/12
Max Flow (GPM): 21
Flow Range (GPM): 0-21
Max Head (Ft): 19
Head Range (ft.): 0-19
Min Temp (F): 36°F
Max Temp (F): 230°F
Max Pressure (PSI): 150 psi
Phase: 1
Voltage:
?
115v
Amperage:
?
0.65
Type: Variable Speed Pump
Connection Type: Flanged
Connection Size: 3/4"
1"
1-1/4"
1-1/2"

Description for Grundfos 59896832

Grundfos is proud to introduce the next generation of energy efficient circulators - the Grundfos ALPHA. By incorporating a permanent magnet motor design, power consumption is now reduced by 50%. The Grundfos ALPHA adapts to the variable demands of the system without sacrificing comfort. Using the AUTOADAPT feature, the Grundfos ALPHA will analyze the system and adjust to meet your heating demands.

Features:

  • AUTOADAPT measures system changes automatically and maximizes energy savings
  • Easy-to-use operation
  • Select a mode with the touch of a button
  • Easy-to-read LED display shows flow indication and power consumption
  • Simple plug connections
  • No wiring required

ALPHA 15-55 F/LC Cast Iron Circulator Pump (w/ Line Cord)

REVIEW SNAPSHOT®

by PowerReviews
GrundfosALPHA 15-55 F/LC Cast Iron Circulator Pump
 
4.7

(based on 14 reviews)

Ratings Distribution

  • 5 Stars

     

    (12)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (2)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Most Liked Positive Review

 

Easy to install, easy to operate

I am a super at a luxury coop on the upper east side of manhattan. One apartment on the ph floor was not getting sufficient cooling due to poor chill water circulation through the...Read complete review

I am a super at a luxury coop on the upper east side of manhattan. One apartment on the ph floor was not getting sufficient cooling due to poor chill water circulation through the convector unit in the apartment. I've installed pumps before but they effected the apartments below (no control over pump speed etc.) so they were removed. This pump allows me to dial the circulation in (it has 6 settings) so as not to affect other units in the building. The plumber installed it in a few hours, and it plugs directly into a 110 volt wall outlet.

VS

Most Liked Negative Review

 

Ehh External control would make better

Simple, quite, and efficient are certainly all positive attributes of this pump. it would be better if it were possible to control speed via a control panel, external input, temperature control, delta-T...Read complete review

Simple, quite, and efficient are certainly all positive attributes of this pump. it would be better if it were possible to control speed via a control panel, external input, temperature control, delta-T control, or anything similar it would be a great pump. The auto mode does indeed work if you have multiple circuits connected to the pump that are opening or closing. however, if the pump is on a fixed circuit i give the auto mode low marks. picking a fixed flow or pressure gives more predictable results.

Reviewed by 14 customers

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5.0

Performs amazingly.

By D

from Long Island, NY

Verified Buyer

Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:

Put it on high to purge the lines after swapping out, then put it on autoadapt. 6watts in idle, 9-14 watts at 1gpm 1 zone. 12-16 watts at 2 gpm 2 zones. Couldnt ask for more

 
5.0

Alpha Pump for radiant heat

By Bii

from Bryson City,NC

Verified Buyer

Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:

Had one on a 6 zone radiant floor heating system and found it was operating at the edge of its performance. It runs quietly, has options -3 speeds plus the self regulating feature which was ideal to balance the floor loops and zones. I am putting a pump in parallel to pick up a little flow when all 6 zones are on.

(1 of 1 customers found this review helpful)

 
5.0

Great replacement for Taco 007

By Off grid user

from Upstate New York

Verified Buyer

Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:

Easily replaced 007 circulaters between isolation flanges without having to re-plumb. Much quieter. As I'm "off grid" producing my own electricity with solar and wind, I'm stingy with every watt. The Alphas use less than a third (I measured both)than the 007 with the same GPM (I measured both).

Delivery was actually one day sooner than "promised". Great pump - great service - competitive price.

 
5.0

They Rock!

By Terry

from White Salmon WA

Verified Buyer

Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:

These pumps are great, I use them almost exclusively now. Set it on auto and it will match most any radiant load be it one small bath or the whole house. The GPM reading on the display is also an excelent troubleshooting feature, just one glance and you know there's flow. Oh, yeah they save about 60% on power consumption. The price has been coming down also. What else can I say, they rock!

 
3.0

Ehh External control would make better

By Reasonable Person

from Washington

Verified Buyer

Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:

Simple, quite, and efficient are certainly all positive attributes of this pump. it would be better if it were possible to control speed via a control panel, external input, temperature control, delta-T control, or anything similar it would be a great pump. The auto mode does indeed work if you have multiple circuits connected to the pump that are opening or closing. however, if the pump is on a fixed circuit i give the auto mode low marks. picking a fixed flow or pressure gives more predictable results.

(1 of 2 customers found this review helpful)

 
3.0

ECM circulators are the way to go

By Craig

from Washington

Verified Buyer

Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:

This is a good ECM circulator offering three speed control and three pressure controls as well as their auto control. The average rating is when compared to other ECM pumps, not when compared to average circulators. I would have scored the pump 5 stars if it offered temperature control or an external analog speed control.

(0 of 1 customers found this review helpful)

 
5.0

Neat concept, love the digital display!

By RT

from Town of Ottawa, near Waukesha, WI

Verified Buyer

Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:

Hydronic circulator.
Digital display, variable speed in auto mode, plus ramps up on demand.

(1 of 1 customers found this review helpful)

 
5.0

Excellent and Efficient

By Brad

from Newton, MA

Verified Buyer

Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:

I purchased the Grundfos Alpha to replace three circulator zones on my existing 20 year-old heating system, after living with it for two seasons. Not that our electrical bills are so high. They are, but you try to reduce where you can and the circulators were 20 years old, running a bit rough it seemed.

I replaced the circulators with Taco Zone Sentry zone valves connected via a Taco ZVC controller. The Alpha installs like any other circulator except this one has a plug, which is perfect. (I set up my circulators to switched receptacles.)

As the zone valves open and close, this remarkable circulator senses the energy consumption coorelated to circulator performance. When valves close, the circulator slows down. As they open, it speeds up. An integral meter tells you power consumption and, not yet tested, GPM.

I have not used this under heating conditions, but rather just ran it cold to balance the system to get it ready for the coming heating season.

Using a Kill-A-Watt meter, I verified the on-board meter and it checks out.

The three circulators I replaced consumed about 65 Watts each while the Alpha draws about 15 Watts when fully ramped up with water at summer temperatures. When fired up, the power consumption should drop even further, slightly, due to lower viscosity of the water.

At my electrical rates (about 18 cents per kWH), I expect to save 180 Watts per hour of operation. This may not sound like much, but over 2000 hours of heating use per year, the circulator will pay for itself in about a year and a half over a single, conventional circulator.

(1 of 1 customers found this review helpful)

 
5.0

Smart Pump

By Mucky

from Canandaigua,NY

Verified Buyer

Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:

I love the readout and flexibility of this pump. Knowing the GPM and the power usage was very useful in setting up my wood boiler and gauging it's performance. I would like more information on the "adapt" setting that adjusts to system needs. What criteria does it use? The "adapt" setting tended to run too slow for my wood boiler. It likes a higher flow to keep the temperature more even in the boiler tank to prevent creasote formation so I'm using the a speed control setting.
The first pump they sent was defective but PEX supply was very good at sending a replacement.

(1 of 1 customers found this review helpful)

 
5.0

installs and works well

By Evan

from Prior Lake, MN

Verified Buyer

Comments about ALPHA 15-55 F/LC Cast Iron Circulator Pump:

I have a small house with modest heat loss.
4 GPM max with <2' head - so this pump is a bit overkill.
I just got the system fully running this weekend. The Alpha runs like magic:

I had all 9 actuators closed and then opened one (.3GPM flow) and the pump saw the pressure drop and pumped against it properly.

With all actuators operating, it ramped up/down fine.

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Q&A: Ask the Questions, share answers

Do you have questions about this product?

get answers from real customers and in-house experts with AnswerBox.

12 Questions | 24 Answers
Displaying questions 1-10Previous | Next »
  • ALPHA 15-55 F/LC Cast Iron Circulator Pump

    Q:

    Will the Alpha connect to existing Taco 007 flanges?
    Asked on 3/9/2014 by Bill from United States

    2 answers

    • VERIFIED BUYER

      A:

      Yes, it will bolt right up w/no problem.

      Answered on 3/9/2014 by papadennis from Alaska
    • VERIFIED BUYER

      A:

      Yes it worked for me! Should work for you as well!

      Answered on 3/9/2014 by Anonymous
  • Q:

    what is the difference between the F and FR designation?
    Asked on 10/15/2013 by joe

    1 answer

    • CUSTOMER CARE

      A:

      F denotes a flange connection, FR would be a rotated flange layout.

      Answered on 10/18/2013 by PexSupply Staff from NY
  • ALPHA 15-55 F/LC Cast Iron Circulator Pump

    Q:

    When using this pump on zone valves, can you ruin it by dead heading the pump when valve closes and the boiler continues to run, such as on these new 90% boilers that have a boost or post purge after t-stat is satisfied?
    I have had other pumps die when running with no water flow. The boilers I am talking about would be the Purefire series by Peerless and the WM97+ by Weil McLain. I am a oil burner tech in NW Phila. with many years on the job.

    Bob K
    Asked on 10/13/2013 by Bob K from United States

    1 answer

    • VERIFIED BUYER

      A:

      1) I'd be afraid of ruining your boiler
      2) the Alpha pump was designed to pump full-time, even with all zone valves
      closed
      3) one of my Alphas started to be audible recently, I don't know if the
      dead-heading added any wear, but the pump is designed for it.

      Answered on 10/14/2013 by Anonymous
  • ALPHA 15-55 F/LC Cast Iron Circulator Pump

    Q:

    I've got an application that requires 6 gpm with 18 feet of head on an iron rad system. This is somewhat beyond the capabilities of the Alpha pump, but I want to go with Alpha. Can I connect two pumps in series? In parallel? Is one way better than another?
    Thanks,
    Steve
    Asked on 9/27/2012 by Steve from Manitoulin Island

    5 answers

    • VERIFIED BUYER

      A:

      You would connect the pumps in series if you have a head that is too high for the pump to overcome; and in parallel if the pump adequatley overcomes the head but you need to up the flow rate. For the best efficency you need to keep the flow rate between 2 and 4 feet per second. Anything below 2fps will risk air getting stuck in the system on a vertical section ( flow rate is slower than bouyancy ) and above 4fps will make noise. For your situation you would be best putting two pumps in series.

      Answered on 9/27/2012 by Anonymous
    • VERIFIED BUYER

      A:

      Given a set and known demand, it's probably better to get one pump to do the job rather than using two. Remember, if you're pumping hot water uphill you have the advantage of convection.

      Answered on 9/28/2012 by Anonymous
    • CUSTOMER CARE

      A:

      Connecting two pumps in series doubles the head capabilities of the circulator, while connecting them in parallel doubles the flow rate potential. It appears that you could use either method to achieve the necessary results with two ALPHA circulators.

      Answered on 10/5/2012 by PexSupply Staff from NY
    • A:

      That is a good question. I would want a Grundfos engineer to answer it especially in the Alpha Auto Adapt Mode. A normal, non variable speed pump, you would connect both pumps in series flange to flange. You might consider connecting a UPS15-58 FC to an Alpha to get the extra head. Talk to a Grundfos engineer.

      Answered on 10/9/2012 by Homer from Nevada
    • A:

      Steve, on further consideration, I remind you that on multiple circuit you add the flow of each circuit when all the circuits are operating for a total flow required. However, you only need to over come the pressure loss, head loss, etc. of the most resistive to flow circuit. You don't add all the circuits "head loss" together. I have used a UPS15-58 in series with multiple Alpha pumps in a manifold radiant sys, but the UP15-58 overcame boiler and piping "pressure losses", it was connected before the Alpha pumps. These pumps were not hydraulically separated.

      Answered on 10/13/2012 by Homer from Nevada
  • ALPHA 15-55 F/LC Cast Iron Circulator Pump

    Q:

    do i still need a pressure differential valve on my secondary loop if i have one of these pumps on that loop?
    Asked on 6/27/2012 by monkeywrench from seattle, wa

    3 answers

    • VERIFIED BUYER

      A:

      If your Alpha on the secondary is supplying zones, then no, you do not need
      a pressure diiff. valve. The Alpha will ramp up & down to supply the needed
      flow, w/out excess.

      Answered on 6/28/2012 by Anonymous
    • CUSTOMER CARE

      A:

      A By-pass valve is not required with the Grundfos ALPHA.

      Answered on 7/2/2012 by PexSupply Staff from NY
    • A:

      NO. The Alpha pump should not be used on a low mass condensing boiler boiler loop only on the heating loop as the condensing boiler requires a given flow through the heat exchanger (HX)to prevent flashing (boiling of the water into vapor in the HX). The purpose of the variable speed pump is to eliminate the pressure differential bypass valve when zoning with zone valves. As the zone valves shut down the pump slows down. The low mass condensing boiler needs 2 pumps one for boiler loop and one for heating loop. Use the Alpha on the heating loop. In radiant systems as the thermal actuators on the manifold close the Alpha pump slows down eliminating the need for a PDBV.

      Answered on 7/5/2012 by Homer from Nevada
  • ALPHA 15-55 F/LC Cast Iron Circulator Pump

    Q:

    I have bought this pump for a two-zone radiant system. I will buy zone valves and control switches for those but I am not sure whether I need a switch relay for this pump. Will it start and stop automatically when it senses a zone valve opens, or does it need to be controlled by a switch relay?

    Thanks
    Asked on 12/13/2011 by Henrik from United States

    2 answers

    • CUSTOMER CARE

      A:

      If you are zoning by zone valve, you do not need a switching relay. The zone valves, zone thermostats, and this pump will all wire into the zone valve control.

      Answered on 1/11/2012 by PexSupply Staff from NY
    • A:

      The thermostats operate the zone valves & the valve's end switch turns on the boiler. The Alpha doesn't need a connection to a relay, only power, it runs all the time, sensing pressure changes in the system and ramping up or down as needed(Auto Adapt). If you have a condensing boiler that requires a boiler loop and a heating loop (two pumps), do not use the alpha on the boiler loop, heating loop only.

      Answered on 2/10/2012 by Homer from Nevada
  • ALPHA 15-55 F/LC Cast Iron Circulator Pump

    Q:

    I would like to have a recirculating pump on my hot water heater for immediate hot water. What other parts would I need if I purchased this model?

    Does there need to be a part installed under a sink the furthest from the hot water heater? Anything else we need to know?
    Asked on 9/6/2011 by Shelia from USA

    3 answers

    • CUSTOMER CARE

      A:

      We would recommend that you use part 96433895.

      Answered on 9/7/2011 by PexSupply Staff from NY
    • A:

      A BIG BIG NO! You must use a bronze or stainless steel pump for an open system and you don't need a variable speed pump. This has to be done right or you will get hot water out of the cold water tap in the kitchen sink. A Grundfos UP 15-18B5 would be a better choice or even a smaller pump, maybe. You can purchase a recirculation kit that has all the part needed and instructions.

      Answered on 2/10/2012 by Homer from Nevada
    • VERIFIED BUYER

      A:

      This pump would be way overkill for this purpose. In fact you usually don't even need a pump. I ran a 3/8" line from the end of my hot water supply line to the bottom of the hot water tank and natural heat convection keeps the water in the line hot all the time. If you did chose to add a pump, one a quarter of the size of the Alpha would be more than adequate.

      Answered on 10/31/2011 by Mucky from Canandaigua,NY
  • ALPHA 15-55 F/LC Cast Iron Circulator Pump

    Q:

    I currently have a 22 year old hydronic heating system that is using a B&G Series 100 pump. (1) Will an Alpha be suitable as a replacement? I am going to be adding another zone for DHW so the pump will now be operational 12 months a year. (2) Most plumbing diagrams show the pump on the supply end of the circuit, mine is currently mounted to a flage off the boiler on the return side..any issues with this configuration? There is plently of room for mounting in the right configuration. I also intend to leave the rest of the system set up as is...the t-stats operate the zone valves, end switches (wired parallel) turn on the boiler which energizes the pump. (3) This means that with each cycle the Alpha will de-energize till the next cycle...any issues with this set up? (4) The current piping is 1-1/4", is this just a matter of getting the right sized flange to make the connections?
    Thanks for the valuable help.
    Asked on 5/23/2011 by Tony from Morris County, NJ

    3 answers

    • CUSTOMER CARE

      A:

      You can use this pump to replace the Series 100 pump. You can install the pump on the return side.

      Answered on 5/24/2011 by PexSupply Staff from NY
    • A:

      JUST MAKE SURE THAT THE EXPANSION TANK CONNECTION TO THE SYSTEM IS ABOUT 12 PIPE DIAMETERS OF STRAIGHT PIPE BEFORE THE PUMP INTAKE FLANGE. Supply or Return location ok. Just plug the Alpha into an outlet and not into the Aquastat relay that turned the old B&G on and off. The Alpha runs all the time. It pays for itself in electricity savings, too.

      Answered on 2/10/2012 by Homer from Nevada
    • A:

      Tony, I'm going to give this another go! Do you know what you're doing? Are you zoning with zone valves? Does the DHW have priority over heating? How are you going to accomplish priority. If the Alpha on the main heating and you have priority on the DHW tank, the Alpha can devote itself to heating the domestic hot water and then switch back to heating. Without priority both the tank and the heating system will operate and the recovery time maybe longer. Choose an Indirect tank that has 1" cupero-nickel heat exchanger (HX) as that reduces the pressure loss thru the tank and the size of the pump necessary to push water through the HX and it will give you a faster recovery time. You need to figure out your strategy.

      Answered on 6/5/2012 by Homer from Nevada
  • ALPHA 15-55 F/LC Cast Iron Circulator Pump

    Q:

    does this pump contain an internal check valve? if so, could it be removed?
    Asked on 3/15/2011 by dusto

    1 answer

    • CUSTOMER CARE

      A:

      It does, and it can be removed/replaced if necessary.

      Answered on 3/16/2011 by PexSupply Staff from NY
  • ALPHA 15-55 F/LC Cast Iron Circulator Pump

    Q:

    is the 1-1/4" mating flange required compatible with an existing Armstrong Astro30 1-1/4"?
    Asked on 2/12/2011 by sr from st paul,mn

    1 answer

    • CUSTOMER CARE

      A:

      Yes, they are.

      Answered on 2/14/2011 by PexSupply Staff from NY
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