ContractorDave
Mechanical
- Jan 16, 2007
- 364
We've hashed this out before but there's always something new.
Here's a fun one: I have an unlisted diesel fire pump (an 80 gpm / 80 ft head end suction Aurora on a small 4kw Yanmar). It's fed from a combination domestic / fire water tank with a float that shuts water off to domestic at a certain level. There's a Watts DCVA after the fire pump along with a Vic 708W and a flow switch. But there is no main drain. There's no test and drain. No drain whatsoever except a 1/2" outlet on a snap tee below the flow switch where a Pressure-Trol switch is mounted and tied into a neat little starter for the diesel. You lose pressure and the diesel starts. Kind of tidy really. Except with no drain you can't mechanically test the flow switch or reduce the pressure in the system to test the fire pump, or forward flow test the DCVA. Or drain down the system to do maintenance or modifications. There's no FDC either. Interestingly enough, there IS a hydraulic data plate (check THAT box!) on the riser from a well know company. I'd show you a pic but don't want to divulge the companies name. They have stickers everywhere.
So you're doing an inspection. What's on your deficiency list?
Regards
Dave
Regards
D
A thing moderately good is not so good as it ought to be
Thomas Paine
Here's a fun one: I have an unlisted diesel fire pump (an 80 gpm / 80 ft head end suction Aurora on a small 4kw Yanmar). It's fed from a combination domestic / fire water tank with a float that shuts water off to domestic at a certain level. There's a Watts DCVA after the fire pump along with a Vic 708W and a flow switch. But there is no main drain. There's no test and drain. No drain whatsoever except a 1/2" outlet on a snap tee below the flow switch where a Pressure-Trol switch is mounted and tied into a neat little starter for the diesel. You lose pressure and the diesel starts. Kind of tidy really. Except with no drain you can't mechanically test the flow switch or reduce the pressure in the system to test the fire pump, or forward flow test the DCVA. Or drain down the system to do maintenance or modifications. There's no FDC either. Interestingly enough, there IS a hydraulic data plate (check THAT box!) on the riser from a well know company. I'd show you a pic but don't want to divulge the companies name. They have stickers everywhere.
So you're doing an inspection. What's on your deficiency list?
Regards
Dave
Regards
D
A thing moderately good is not so good as it ought to be
Thomas Paine