Tankless problem - NOT the faucets - Page 2 - Plumbing Zone

Colgar · 03-19-2010, 11:45 AM

Quote:

Originally Posted by Asparta

You will not be able to check a standing pressure test, as the tankless unit does not have a standing pilot. Instead, take the test at the furnace, with the pilot going. If the furnace does not have a pilot either, you have to take a test where you can have a minimal amount of gas flowing. Do not take a test with the burner going, and stay on the inlet side of the gas valve.
Have you checked the flow switch? Not sure if that model has a separate flow switch, but I know Navien models do. Could be hooped!

I guess I don't follow.

Why do I care what the pressure is at the furnace if I suspect a pressure issue at the WH? Depending on piping arrangement, pressures could be fine at the furnace, but not at the wh, correct? What I mean is, a pressure check at the furnace tells me nothing more than what's going on at the furnace. Granted, checking pressure at the WH with the furnace and other gas appliances running will yield some good info.

I also don't understand the standing pilot thing. What's that got to do with it?

I'm not looking to start an arguement here, just looking to understand where you're coming from.

Asparta · 03-20-2010, 01:10 AM

you jsut wnat to find out if there is too much pressure drop when the appliance fires. If there is no standing pilot, then you can't get a standing pressure test. This test shows you what's coming into the house for pressure. Now you fire up your applaince, and if there is a greater drop than 1" w.c. then your gasline is undersized....

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
lav faucets cf??	beachplumber	Plumbing Material and Products	4	02-10-2010 12:48 AM
Sayco faucets	3KP	Residential Plumbing	16	01-30-2010 08:28 PM
What are the best faucets?	hepco	General Plumbing Discussion	32	12-20-2009 10:58 PM
Legend FP Faucets	Ron	Plumbing Material and Products	19	01-10-2009 05:25 PM
What faucets?	Song Dog	Plumbing Material and Products	24	09-13-2008 11:10 PM

03-20-2010, 01:10 AM	#12
Asparta Member Join Date: Mar 2010 Location: Drayton Valley, Alberta, CANADA Posts: 38 My Photos	you jsut wnat to find out if there is too much pressure drop when the appliance fires. If there is no standing pilot, then you can't get a standing pressure test. This test shows you what's coming into the house for pressure. Now you fire up your applaince, and if there is a greater drop than 1" w.c. then your gasline is undersized....