Joseph Skoler
Member
I installed a Takagi 110u about 3 months ago. It is the only LP device in the house and has a 3/4" iron pipe feeding it.
Whenever anyone takes a shower for more than 10-15 minutes, the unit fails with error 991.
Researching this it looked like a venting problem.
The entire length of exhaust pipe is less than 10'
I removed the back draft prevented.
I had a PVC elbow just sitting on the air intake port (there should be plenty of fresh air in the room in which the heater is installed) and took it off (so there is nothing connected to the air intake on the Takagi).
I tried the temp setting at 110 as well as 120.
I checked the dip switches (they are correctly set for LP).
I tried changing the dip switches to indicate a longer exhaust pipe
None of this fixed the problem.
I notice that with the shower running, the unit cycles every 2-3 minutes (i.e., the flame goes on and then off). The flame also seems to modulate (gets stronger and weaker).
Unit says flow is 1gpm with shower running.
What could be going on?
Thanks!
Whenever anyone takes a shower for more than 10-15 minutes, the unit fails with error 991.
Researching this it looked like a venting problem.
The entire length of exhaust pipe is less than 10'
I removed the back draft prevented.
I had a PVC elbow just sitting on the air intake port (there should be plenty of fresh air in the room in which the heater is installed) and took it off (so there is nothing connected to the air intake on the Takagi).
I tried the temp setting at 110 as well as 120.
I checked the dip switches (they are correctly set for LP).
I tried changing the dip switches to indicate a longer exhaust pipe
None of this fixed the problem.
I notice that with the shower running, the unit cycles every 2-3 minutes (i.e., the flame goes on and then off). The flame also seems to modulate (gets stronger and weaker).
Unit says flow is 1gpm with shower running.
What could be going on?
Thanks!