75F Dynamic Airflow Balancing User manual

www.75fahrenheit.com [email protected] [phone]
75F™Dynamic Airflow Balancing™
QUICK START GUIDE

Page 1 of 11 Planning Guide –Version 1.0 www.75F.io [email protected] [phone]
1. Before You Begin
Gather all of the information you will need to register the CCU (Central Control Unit).
Description
Your Information
Wi-Fi SSID:
Wi-Fi Password:
Facility Manager email address:
Installer email (must be approved and provisioned by
75F before installing
Building address (Street and Zip Code):

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Before You Begin
Following is the list of components that shipped by 75F and a list of components that the installer is responsible for providing.
Provided by 75F:
Contractor is responsible for providing:
Smart Dampers –pre terminated with 25’ harness
o___ 6” Round
o___ 8” Round
o___ 10” Round
o___ 12” Round
___ CCU –Central Control Unit
___ 6” USB micro to USB mini
___ Plastic wings & 1 ½” #6 wood screws
___ Pan Head screws for mounting CCU
___ Antenna
___ Allan Wrench
___ WRM –Wireless Room Module
___ Faceplate for WRM
___ Sub base from WRM
___ 5v DC regulated power supply
___ Din rail and hardware for mounting power supply
___ CO2 Sensor
___ Occupancy Sensor
___ Occupancy Sensor Faceplate
16/2 stranded speaker cable
Wire connectors suitable for (3) 16 gauge wires
Cable management materials such as zip ties, etc.
Sheet metal screws
Single gang junction boxes (recommended, not required)
Electric enclosure for 5V DC Power supply
Switch to turn off 120V AC power

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2. Introduction
In the 75F™ system, the WRM is the
equivalent of a zone controller. It senses
room temperature and supply air
temperature. Following instructions from the
CCU, the WRM controls up to two smart
dampers in the supply air diffusers.
The WRM ‘pairs’ with the CCU via a secure
wireless mesh network. During pairing, the
CCU associates the WRM with a particular
zone that the user defines.
Under normal circumstances, the WRMs
modulate the air flow by adjusting the
position of the smart dampers as per the CCU
command. However, the WRM maintains a
local copy of the zone schedule and operates
in a standalone mode in communication is
lost. It will change the desired temperature
per schedule and control the damper
according to its last update.

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Schematic Wiring Diagram
CAT 5/6 Wire
Harness
RTU

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WRM
16 Gauge Stranded
5v DC Bus
Optional 2nd Damper
Optional CO2Sensor
Optional Occupancy Sensor
Central Control Unit (CCU)
Wireless Mesh
Network
Smart Damper
WiFi
Internet
Connection
5v
regulated
DC power

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3. Design Principles
The 75F system was designed to have a WRM and a Smart Damper in every room being controlled by the CCU. These components all communicate with the
CCU which acts as the local brains for the system creating a series of personal MicroZones which are smaller than traditional zone control systems. Each WRM
establishes a MicroZone and controls up to two smart dampers.
In spaces where there are more than two diffusers, the designer has a choice to either break the room up into multiple zones, or merge multiple sensors into
one zone. To guide this decision, find out if the occupants have different temperature preferences in the space. If occupant desired temperatures are 1 or 2°
F apart from one set of diffusers to the other, you might consider breaking this into two zones so that each occupant can have their own desired temperature
(see Zones 1 & 2, below). This technique is limited to the thermal limits of the space, however. Place the WRMs on an interior wall location that best
represents the desired temperature locations. If desired temperatures are the same from all diffusers, merge the zone as in Zone 9, below by pairing an
additional WRM in the same room.
Zone 9 (merged}
WRM
WRM
Zone 1
WRM
Zone 2
WRM
WRM
WRM
WRM
WRM
WRM
WRM
CCU
CCU
WRM
Central Control Unit
Wireless Room Module
Harness cable
Supply duct
Return duct
RPS
RPS
Regulated Power Supply
Bus Line

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Power Strategies
Plan your 5v DC (USB) power strategy. Each WRM requires 5V, 60mA power. An efficient way to power many WRMs is to install power bus lines of less than
100’ that run from the provided 110v AC to 5v 6A DC power supply to each WRM and a dedicated line for each CCU. Use at least 16/2 stranded cable (audio
speaker cable) with red and black insulated wires no longer than 100’. Follow local code for wire type and connections. CCUs are powered with the provided
5v DC regulated power supply at no longer than 20’.

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4. Installation
The following sequence of installation steps is recommended as a general outline and a good place to start as we understand each job will have
a unique set of circumstances. Refer to the WRM and CCU Installation Guides for more detailed step.
Location
See Section 3 Design Principles for power strategies.
1. Locate where each WRM is mounted and measure 5’ up from the floor to cut a 1.5” hole to install the
WRM.
a. The WRM can be installed in an existing junction box. DO NOT USE METAL BRACKETS AS
THIS INTERFERES WITH WIRELESS RADIO SIGNALS.
2. Install the CCU at its designated location using the provided mounting bracket.
3. Install the power supply (in an electrical box is recommended) in a strategic location to supply power to all 75F components. Be sure the
box is not on a lighting circuit. Don’t turn on the power supply until you complete wiring all components of the system.
Powering the System
4. Install single gang boxes within 15’ of each WRM. (Recommended, not
required)
5. Lay the bus line from the power supply so they pass through all of the
single gang boxes that are installed near each WRM.
6. Run a power line between the bus line (starting in each single gang box)
to the WRM. Run a designated power line from the RPS to the CCU. It
should not exceed 50 feet.

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Installing the Smart Dampers
7. Install the smart dampers and run the harness to the location directly above
the WRM it will be associated with.
8. Run the power supply and the damper harness down the wall and through the
Hole in the wall.
System Set Up
9. At each WRM location, pull the power supply and damper harness through
the sub base and install it in the hole previously cut into the dry wall. Screw in
the WRM to the sub base and snap on the faceplate.
10. When everything is wired, turn on the power supply.
11. Register the CCU and configure initial settings as described in the 75F CCU Installation Guide. Be sure to test
each function of the RTU to be sure the harness wires are installed correctly.
12. At this point, all WRMs should be reading “Up Dn” on the screen.
13. Press the Up and Down button at the same time to begin the damper speed calibration sequence. The WRM
will count down from 300 seconds and then read “AC” when completed.
14. Press the Up and Down button again and the screen will show “AA” on one WRM at a time, then pair it with the CCU.
15. Repeat until all WRMs are paired.
Portal Set Up
16. Customize the online Facility Manager Portal:
a. Upload a PNG or JPG of the floorplan to the online portal. Associate each WRM with its location on the floorplan
b. Customize the zone and system schedules
17. Using the online Installer Portal, customize the portal with:
a. Customer contact information
b. Alarm recipients
c. Equipment details

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5. Resources
Support portal:
Visit the 75F Support portal below to find all product documentation and support related videos.
http://www.75f.io/support
Password: 75FSupport
Documents
75F Installation Planning Guide
OAO Installation and User Guide
WRM User Guide
CCU User Guide
CCU Installation Guide
WRM Installation Guide
Work Order Sheet
Videos
Smart Damper Installation
Wireless Room Module Installation
Central Control Unit (CCU) Installation
Install Wizard
White Papers
Doe Study –Energy Savings with Control Strategies
California Bypass Dampers
FAQs