Navien SmartZone+ Controller Pump Control for 2, 3, 4 or 6 Zones.
Use for any manufacturer's boiler that is installed in a multi-zone space heating application.
Now it is easy to integrate any boiler into a zoned hydronic system with pumps. Use these controllers to customize your zoned heating system. The FMZ-40 communicates between your boiler and up to six zone pumps. Your settings can improve system efficiency.
Choose from 2, 3, 4 and 6 zone controller models in the menu above.
♦ Advanced, built-in display with system status and diagnostics
♦ Compatible with boilers (using TT contacts) and pumps of all manufacturers
♦ Use multiple SmartZone+ controllers to control up to 24 zones
♦ Setting for DHW (domestic hot water) priority
♦ Purge time settings
♦ Freeze protection using an indoor temperature sensor
♦ Manual pump control
♦ Automatic air purge
♦ Advanced user modes allow you to further customize your system
These zone pump controllers are compatible with both Navien NHB Series gas-fired boilers and NCB Series combi-boilers.
This item can only turn pumps on and off, and cannot switch on and off valves.
FAQ ("Frequently Asked Question")
Q1: I've seen part numbers for the 6 zone controller as PFMZ-06-001 and PFMZ-06P-001. Are these different products? What the "P" stand for?
A1: Navien tech support has confirmed that they used both item number schema interchangeably in the past. Examples:
PFMZ-02-001, PFMZ-03-001, PFMZ-04-001 and PFMZ-06-001. However, as of 2018, they are using only the item numbers containing the P, and references to the item numbers without the P are no longer shown on Navien's resources. The manual refers to this item as FMZ.
Q2: Will this zone controller turn the zone pumps OFF if the Navien NHB boiler turns off when the outdoor temperature exceeds the preset point in the boiler? Right now I am using a generic controller, and when the boiler turns off because the outdoor temp is higher than what I have the boiler set at, then the zone pumps will continue to run even though the boiler is off.
A2: Yes, the SmartZone+ will turn zone pumps off in response to outdoor temperature sensor signals. That is one of the functions it is designed for.