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Do not use this item for any installation or repair of potable water applications.
This product does not comply with the "Safe Drinking Water Act,"
which requires that products meet low-lead standards in order to be used in systems providing water for human consumption (drinking or cooking).
This item is for non-potable (non-human consumption) water applications only.
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Zones are the number of areas that you want to control independently of each other. If two rooms can be controlled together, they can be one zone; if they need to be controlled separately, they should be separate zones.
Amperage, or amps, refers to the amount of electricity flowing through the wires.
The FuelMizer is a microprocessor-based control designed to regulate the supply water temperature of a single boiler, based on the outdoor temperature. The FuelMizer is a boiler reset control and switching relay in one unit; it is ideal for retrofit application, but may also be used in new installations as well.
(based on 3 reviews)
of respondents would recommend this to a friend.
Reviewed by 3 customers
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(0 of 1 customers found this review helpful)
Requires a little tweeking
By Just Keep Tweeking
Comments about FuelMizer SR501-OR-4 Switching Relay with Outdoor Reset:
Hello: I installed the Fuelmiser on a Weil-Mclain Model gv5 140,000 btu gas fired boiler with three zone valves and one circulator Pump. The stock boiler had a temperature differential of 20 degees at the boilers gauge which is measuring at the water. The fuelmizer has two settings 20 degree and a 10 degree Differential. The best I could get on the 10 degree differential setting is 25 degrees at the boilers gauge I have the sensor straped on to copper pipe and I moved to different locations. I think the engineers didnt take in considertion the heat transfer thru the pipe.I think the senor would work best in a submersion well. The sensor work best wired with 14 gauge wire in conduit. (Read Tekmar sensor instructions). The best differential I got with 20 gauge bell wire was 30/35 degrees at the boiler gauge. The differential will slow your heat recovery.The unit is well made and easy to install and will save you aprox.14%. I plan on change the sensor to a submersion well. Pexsupply has great service they reply to Emails,shipfast. Taco Service??
Bottom Line Yes, I would recommend this to a friend
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Not for the total amature
from Palo Alto, CA
You need to be comfortable with line voltage electrical work as this connects to the AC power and circulator pump as well as Low voltage thermostat.Note: The basic internal wiring is for 2/3W Heating Stats. I suggest that the Heating circuit of a Heating/Cooling system leads be extended TO this device.I was hoping for better fuel saving and less overshoot, on a really old, 1947 radient system. System lag due to a thick slab and heat losses makes recovery from a nighttime setback really slow. I would not reccommend this solution for this kind of system, payback will be out many years.
Installation was a breeze
from Putnam Valley, New York
I just installed this device, and it has been performing exactly as described. TACO Tech support was very responsive when asked a question about the aquastat settings, I have no doubt this product will be saving me money in the upcoming year and paying for itself in no time.
Images shared by jpipx
Fuel Mizer installed on a New Yorker Boiler
Tags: Picture of Product, Using Product
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