Delta-P & Delta-T Pumps. Big Difference.
System Design with Differential Temperature (Delta-T)
North American residential system
design is pegged to the temperature
differential between the supply and return
(Delta-T). It's part of the Universal Hydronics
Formula, it's how we sizeboilers, select pipe
size and determine the amount of radiation to
put into a room. We also zone our systems and
turn them on and off via a thermostat on the
wall- all in an effort to deliver comfort.
Universal Hydronics Formula:
GPM = BTUH ( T x 500)
Smart Delta-T Circulators
If we use a Delta-T based smart circulator in these North American systems, like the Taco Bumble Bee or 00-VDT, it reacts to how many zones are open, which zones are open, and even how cold it is outside,automatically - without an outdoor sensor. These infinitely variable speed Delta-T circulators deliver ONLY the BTU's required to match the actual heating load required by each zone. The entire system runs at peak efficiency, no matter the time of year, accurately providing optimum comfort and real electric and fuel dollar savings.
On the other hand, Delta-P ECM circulators operate best on constant circulation and utilize thermostatic radiator valves (TRV's), instead of thermostats, to control the flow to panel radiators. As the TRV's modulate open and closed, the pressure in the system changes and the Delta-P circulator speeds up and slows down to compensate for the change in pressure. In North American systems with on-off zone valves, those pumps read the number of zones in the system, assign a fixed speed for each open zone and switch motor speeds depending on which zones are open. It's like having a "however many zones are open speed pump." It's important to know that if you prefer to zone with circulators, Delta-P pumps never vary their speed - they work just like a single speed pump.
Which to choose?
If comfort delivery and efficiency are your goals than choosing the right circulator based on the system design can make all the difference. Delta-P circulators only adjust to changes in system pressure. Delta-T circulators measure the temperature difference between supply and return and infinitely vary their speed to deliver spot-on efficiency, compatibility, and comfort. Then add Zone Sentry Zone Valves and Taco Controls for the most efficient comfort system available anywhere. - Contributed by Chip Bidigare
CA great way to combat the value priced competition in the mini-split market is with the New Mitsubishi MSZ-HE Series Single Zone Product. Great for applications with hot spots including bedrooms, home offices, living rooms, dining rooms, basements, and kitchens. These systems are Inverter Driven and come with the same quality as a regular M-Series but without some of the features. Our packages include Indoor and Outdoor Units, Wireless Remote, and 15 Foot Line Set. Drain Pan heaters, Wall-mount Brackets or Pads are all recommend add ons to the sale. These units are in stock at the Warehouse. The "Value Series" Package target audience is those who are buying less expensive duct-less equipment elsewhere, not our Diamond Dealers.
FlashShield™ CSST provides the
highest lightning resistivity
and is the only metallically-
shielded gas piping on the market.
FlashShield meets strict criteria
of both LC1024 and LC1027.
CSST supplies natural gas or
liquefied petroleum gas to
appliances with safety and
flexibility. Simple hand tools such as
tubing cutters, wrenches and utility knives are all
that are needed to work with the FlashShield components.
Corrugated Stainless Steel Tubing FlashShield™ Corrugated Stainless Steel Tubing (CSST) supplies natural gas or LP gas to appliances. FlashShield is a reliable, lightning-resistant system that can be installed in all modes of construction. Flexibility and no additional bonding means quick and easy installations: FlashShield® installs 30-70% faster than traditional piping methods.
Quick Connects & Accessories >> Quick-Connect valve and accessories provide a safe and easy "quickconnect" for barbecue grills, space heaters and decorative lighting. Recessed mounted quick connect boxes are available in stainless steel.Use quality shut-off ball valves to control gas flow to appliances and pounds-to-inches regulators.
Fittings >> FlashShield™ fittings are designed with a patent pending feature that bites through the first layer of semi conductive polymer and into the metal mesh. This creates electrical continuity throughout the system. The fitting's sealing surface does not sit on the cut end of the tubing, so even the most unsightly cut will yield a tight seal. With no o-rings or gaskets, the reusable brass components provide a reliable metalto- metal installation.
FlashShield fittings and tees can be used with Yellow Gastite CSST.
The person in this position will perform all inside counter sales operations and merchandising functions within the Will Call Counter Sales area and must work well under pressure. Responsibilities include inside counter sales, merchandising and promotion activities, order processing, product application, pricing and all aspects of customer service. Warehouse, cleaning and organizing activities are also required on an as-needed basis. Experience preferred with room for advancement. those with initiative and upbeat personality are welcome to apply.
This person shall perform other duties as assigned.
- Able to lift 70 lbs.
- Walking, or standing for long periods
- Reaching, bending, etc.
- Knowledge of HVAC products required
- Ability to follow specific verbal instructions
- Well organized
- Excellent communication and organization skills
- Excellent computer skills
- Responds to all customer inquiries on products, their applications, necessary research, etc.in order to provide customers with timely and accurate service.
- Process orders, warranties and credit returns with appropriate documentation.
- Answer incoming customer telephone calls and provide service in regards to all aspects of business including will call, special orders and deliveries.
- Work as team player with other staff and communicate in a professional and courteous manner with co-workers, vendors, and customers.
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Grand Rapids Branch
Class @ Farmington, MI
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