Please don't laugh at the silly question, but what component should I
buy to reduce the power output of a transformer from 26.4 volts, down
to 24 ?

This is an AC transformer that supplies power to the circuit board of
a home heating furnace. It takes line voltage in on one end and should
have an output of 24 Volts AC.

Two wires in, two wires out; grounding through its metal case. The
actual voltage going in is 118v and the output is 26.4v to 27.4v (two
voltmeters used).

The circuit board feeds the thermostat (among other things) and the
output on the thermostat leads is 27.11v

Do I need to install a resistor? If yes, what capacity?

Michael Stoic wrote:
Please don't laugh at the silly question, but what component should I
buy to reduce the power output of a transformer from 26.4 volts, down
to 24 ?

This is an AC transformer that supplies power to the circuit board of
a home heating furnace. It takes line voltage in on one end and should
have an output of 24 Volts AC.

How do you know it is truly 26.4 volts? Maybe your meter is off. Besides,
a plus or minus is always normal. Don't lose any sleep.
--
Ed
http://pages.cthome.net/edhome/

"Michael Stoic" wrote in message
...
Please don't laugh at the silly question, but what component should I
buy to reduce the power output of a transformer from 26.4 volts, down
to 24 ?

This is an AC transformer that supplies power to the circuit board of
a home heating furnace. It takes line voltage in on one end and should
have an output of 24 Volts AC.

Two wires in, two wires out; grounding through its metal case. The
actual voltage going in is 118v and the output is 26.4v to 27.4v (two
voltmeters used).

The circuit board feeds the thermostat (among other things) and the
output on the thermostat leads is 27.11v

Do I need to install a resistor? If yes, what capacity?


Once you put a load across the transformer output it will probably drop a
bit. I'm sure that 24 volts +/- 10% will be ok.

"Michael Stoic" wrote in message
...
Please don't laugh at the silly question, but what component should I
buy to reduce the power output of a transformer from 26.4 volts, down
to 24 ?

This is an AC transformer that supplies power to the circuit board of
a home heating furnace. It takes line voltage in on one end and should
have an output of 24 Volts AC.

Two wires in, two wires out; grounding through its metal case. The
actual voltage going in is 118v and the output is 26.4v to 27.4v (two
voltmeters used).

The circuit board feeds the thermostat (among other things) and the
output on the thermostat leads is 27.11v

Do I need to install a resistor? If yes, what capacity?


this is Turtle.

Michael , i've done this hvac work all my life and the voltage of the gas
furnaces is called 24 volt ac but ranges from 20 volts to 28 volts ac. The
transforner that puts out the 24 volts ac normally for the gas furnaces with out
no load on it will normally put out 26 to 28 volt ac. With a load on them from
the gas furnace and cooling system running . it could run the voltage down to 17
or18 volts. So if you have a 28 volt ac without a load on it, that is very
good.

Michael , your good to go but just don't know it.

TURTLE

OK, I've made my peace with it. Thank you for your help!

..MS

On Wed, 26 Oct 2005 03:31:26 GMT, "FDR"
wrote:


"Michael Stoic" wrote in message
.. .
Please don't laugh at the silly question, but what component should I
buy to reduce the power output of a transformer from 26.4 volts, down
to 24 ?

This is an AC transformer that supplies power to the circuit board of
a home heating furnace. It takes line voltage in on one end and should
have an output of 24 Volts AC.

Two wires in, two wires out; grounding through its metal case. The
actual voltage going in is 118v and the output is 26.4v to 27.4v (two
voltmeters used).

The circuit board feeds the thermostat (among other things) and the
output on the thermostat leads is 27.11v

Do I need to install a resistor? If yes, what capacity?


Once you put a load across the transformer output it will probably drop a
bit. I'm sure that 24 volts +/- 10% will be ok.