Tag Archives: CFM

Do it yourself

changing fan blades to get quieter condenser operation

Leave a comment

By lunstroth

Hi

i have a Ruud unit (Model UAMB-030JAZ, ’01), and last August the fan motor went out on the condenser unit. I had a guy fix it, and he did using an AO SMith Model # F48T12A01. I think he used the same 2 blade fan, but when he put it all back together the fan blade itself was making more noise, as though perhaps he had bent it a bit.

Finally, the noise has driven me to distraction and I started looking into changing the motor and the fan blade, and then encountered not only suppliers who will not sell to me (in Houston), but an amazing paucity of information (or at least it hard for me to find), and there is a technical problem. I understand that i can get a somewhat more quiet motor (maybe 5 db, with a sleeve bearing), and that a 4 blade fan will be quieter b/c of lower pitch of the blades.

But as i read it became clear there is a technical problem: if the CFM not within some range (i cannot figure out which range) then things with the entire unit get wonky. So, it seems to me the solution is to find the CFM for the unit and replace it with a motor and 4-blade fan that produces the same throughput of air.

My question(s): is that an accurate way to think about it, and if so, how can i figure out which motor and fan-blade? any suggestions for making it quieter (apart from sound panels, and wraps of various kinds)? Can you straighten me out on the issue?!

thanks very much in advance!

john

…read more

Source: DoItYourself.com

Do it yourself

Fullsize pickup – swap to electric cooling fans?

Leave a comment

By CMil

Need a little advice. I want to swap my water pump-driven cooling fan for one big or two smaller electric ones on my truck. It’s a 1994 Ford F-150 extended cab with the 300 I-6, 4-speed automatic trans, A/C and two-wheel drive. What I need to know are: at what temperatures do I want the fan/s to come on and go off? and how many CFM should I be looking to move through the radiator/condenser at a minimum? I think I would prefer dual fans simply for better coverage and maximum cooling, but to keep the ECM happy I really want to keep the on and off temps right. Any advice is greatly appreciated. Thanks in advance – Chris :coffee:

From: http://www.doityourself.com/forum/pick-up-trucks-campers-trailers-rvs-motor-homes/493711-fullsize-pickup-swap-electric-cooling-fans.html

Business, Finance, Occupation & Industry

Sunrise Telecom Adds OAM and MPLS-TP Capabilities to RxT Ethernet Service Activation Platform

Leave a comment

By Business Wirevia The Motley Fool

Filed under:

Sunrise Telecom Adds OAM and MPLS-TP Capabilities to RxT Ethernet Service Activation Platform

New Features Added to RxT 10GE Module Enable Service Providers to Successfully and Efficiently Deploy and Maintain Advanced Carrier Ethernet Services

SAN JOSE, Calif.–(BUSINESS WIRE)– Sunrise Telecom® Incorporated (OTC: SRTI), a market-leading provider of test, monitoring and workflow management solutions for cable, telecom, wireless operators, and equipment manufacturers, today announced the addition of OAM (Operations, Administration and Management) and MPLS Transport Profile (MPLS-TP) capabilities to the company’s versatile RxT® Smart Productivity Test Platform. Integrated into the RxT 10GE module, the new features enable service providers to successfully and efficiently deploy and maintain advanced Carrier Ethernet services such as LTE, IPTV and mobile backhaul.

As Ethernet rapidly replaces legacy TDM services, enabling high-quality applications such as business services and wireless backhaul, service providers require a robust set of management tools to deploy and maintain their Ethernet service networks. Migration from legacy transport technologies to Ethernet demands the complete toolkit of fault detection and isolation tools now supported in the RxT-5000.

Ideal for technicians who provision and assure end-to-end connectivity fault management (CFM) of Ethernet circuits for business services, the OAM features of the RxT 10GE include connectivity check messages, Ethernet loopback, and link trace generation and analysis. For testing cell site Ethernet backhaul and Ethernet business services, the RxT 10GE supports CFM testing based on IEEE 802.1ag and ITU Y.1731 standards.

“Y.1731 is becoming the dominant OAM protocol as it incorporates key features of the other protocols into one heterogeneous toolkit,” explained Ken Fridley, product marketing manager at Sunrise Telecom. “The ability of the RxT platform to test proper configuration of maintenance entities using the Y.1731 OAM protocol is critical for service providers because it simplifies the deployment of Ethernet WAN services, enables accurate deployment of SLAs, provides end-to-end OAM test capabilities, supports a robust fault management toolkit and provides valuable performance management tools.”

The RxT 10GE also now features testing of MPLS-TP services, an emerging Layer 2 transport technology, to verify that MPLS-TP services are properly configured for end-to-end OAM. Customer and control plane data verification is seamlessly included in the RxT 10GE module which means MPLS-TP and SLA verification can be determined simultaneously, increasing the efficiency of both installation and network troubleshooting.

For more information on the Sunrise Telecom RxT Smart Productivity Test Platform and the RxT 10GE module, visit the product page at<a target=_blank …read more
Source: FULL ARTICLE at DailyFinance