Venting
A change in pvc pipe size for venting must be made in this orientation
What is vertical
These are two gasses used together for brazing
What are oxygen and acetylene
this size breaker is appropriate for 10 gage wire
what is 30 amp
Before and after charge adjustment, this amount of time should pass before declaring a proper charge
what is 15 minutes
Pressure testing requires 200 psi to hold for how long without dropping
What is 1 hour
This is the minimum slope toward the furnace the exhaust should have
what is a 1/4 inch per foot
This inert gas MUST be used to displace oxygen inside the system while brazing
What is nitrogen
For Bryant heat pumps, the reversing valve is energized in this mode
What is cooling
The natural gas pressure setting for high fire at the manifold should be
What is 3.5 inches of water column
A vacuum that holds decay below 1000 microns is considered to be this
What is tight and dry
Long radius pvc 90 elbows in 2 inch size equals this many feet in straight pipe
What is 3 feet
The filter dryer should be installed in this location.
What is the evaporator coil (five inches from the liquid line connection)
Drain traps are required on these types of installs or coils
What are air handlers or negative pressure coils (coils that suck through vs blow through)
In order to connect to the NFC chip on the furnace board, power must be ___
What is off
After evacuation, slowly open this valve first
What is the liquid line service valve
Horizontal portions of the venting system shall be supported to prevent sagging, for 2 inch pvc, this is the maximum spacing between hangers
What is 3 feet
This is the pressure to set your torch set at
What is 7 oxygen, 14 acetylene
This is required where units are installed where a water leak could cause catastrophic damage to surroundings
What is auxiliary pan
For line sets over 15 foot long, this is the amount of additional refrigerant per foot needed
What is .6 oz per foot
The decay test step during evacuation is this long
what is 7 minutes
Type-B double wall vent pipe is required in these areas
What are unconditioned spaces
When purging with nitrogen, go in the _____ and out the ______
What is suction and liquid
When in doubt, refer to this for the answer
What is the manual
The propane gas pressure setting for high fire at the manifold should be
What is 11 inches of water column
Best practice is to connect your micron gage at this point when evacuating the system