FUNCTIONS AND FEATURES
Geo-Flo’s NP Multi™ is an engineered solution designed to simplify your geothermal applications for multiple heat pumps by providing virtually all of the piping, flushing/purging valves, and pumps/zone valves for three to five heat pumps as part of a factory assembled package. There is no easier method available on the market today for multi-unit installations.
- Multiple Heat Pump Piping: Factory assembled headers/manifolds for three, four, or five heat pumps. Significant labor savings for up to 25-30 ton systems.
- Variable Speed Central Pump or Constant Speed Distributed Pumping: Premium (most efficient) option utilizes central variable speed pumping (Magna3) and a zone valve for each heat pump; alternate design provides one, two, or three (UPS26-99 or UP26-116) pumps for each heat pump with check valves and isolation valves.
- Choice of Variable Speed Central Pump Options: Single insulated pump, two pumps in series, or two pumps in parallel (primary/backup — wireless communication), plus two pump sizes.
- Choice of Zone Valves: Taco Zone Sentry™, Belimo, or remote (user provided) zone valve options.
- Loop Expansion/Air Separation: Non-pressurized design operates as a “built in” expansion tank and air separator. Pressure/vacuum relief is standard on all NP Series flow centers.
- HDPE Tank with Insulated Cabinet: Heat fused connections to HDPE tank eliminates leaks; foamed in cabinet helps prevent condensation at low ground loop temperatures.
- Ground Loop Connection Choices: 3” ANSI flange, 2” HDPE fusion, or 2” PVC Schedule 80 connections to ground loop for maximum flexibility.
- Online Calculator: A comprehensive design tool is available on the Geo-Flo website. From pressure drop calculation, to pump sizing to model number generation, the Calculator is an essential design tool for multi unit applications.
Click here to download NPM Nomenclature.
NPM Part Number Builder below
Flow Center Sizing
When sizing pumps for a NPM multi-circuit flow center, it is critical that a pressure drop calculation be completed for the
entire system when all heat pumps are running. Pump selection must be based upon the required system flow rate and
pressure drop with all units running. While this is a relatively straightforward process and calculation for projects with
one or two heat pumps, it is increasingly complex for systems with three or more heat pumps particularly when zoning
with circulators. The details of this calculation are beyond the scope of this document. However, Geo-Flo provides a free
online calculator for this product to assist in the design and selection of the proper NPM. Click here to be taken to the calculators.
| PN | Description | U.O.M | Photo |
|---|---|---|---|
| 4008 | Replacement Cap, 3-1/2", NP Flow Center | Each |  |
| 3786 | Valve, 1" FPT x 1" MPT, Ball. Full Port, Brass | Each |  |