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Apr 2018
MSAC Hotline: Hot Surface Igniter
I have a furnace with a hot surface igniter that will
not ignite. One thing led to another and we ended
up changing the pressure switch and inducer motor.
When the unit comes on it starts the blower wheel,
then goes to the inducer. But when the inducer
starts, nothing else happens. The surface igniter
doesn’t glow either. I don’t know what else to do.
Read More
Feb 2018
MSAC Hotline: Lubricant Compatability
I need to test the compatibility of a specific lubricant
with refrigerant R-134A. I found a sealed glass tube
method for testing, but it is a difficult test and is rarely
found in laboratories in my country of Thailand. So do
you have any other method to prove that compatibility?
Read More
Jan 2018
MSAC Hotline: Motor Speeds
I’m looking at a stock motor. It is a three-speed,
1,075 rpm, single-phase, direct-drive blower motor.
What are the rpm of the speeds?
Read More
Dec 2017
MSAC Hotline: Digital Wet Bulb Thermometer
How does a digital wet bulb thermometer work, as
there is no wick or water on it? Please provide an
explanation of how a digital wet bulb thermometer
measures wet bulb temperature?
Read More
Nov 2017
MSAC Hotline: Blown Circuit Board Fuse
I have a 5-ton RTU that keeps blowing the 3 amp circuit
board fuse. The contactor and circuit board have both
been replaced and it still blows the fuse every other
day. Any helpful thought as to what could cause this?
Read More
Oct 2017
MSAC Hotline: Alternative Refrigerants Data
I have a couple of questions regarding alternative
refrigerants. Why do some refrigerant manufacturers
not include the “mass refrigerant flow rate”
when comparing alternative refrigerant replacement?
Read More
Sep 2017
MSAC Hotline: Hydrotest Piping Pressure
What pressure do you hydrotest piping for 407C?
Does this question make sense?
Read More
Jul 2017
MSAC Hotline: Tandem Compressors
The Manufacturers’ Service Advisory Council provides expert answers to your technical questions
Read More
Jun 2017
MSAC Hotline: Superheat
The Manufacturers’ Service Advisory Council provides expert answers to your technical questions
Read More
May 2017
MSAC Hotline: POE Oil
The Manufacturers’ Service Advisory Council provides expert answers to your technical questions.
Read More
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