Watts Aerco INN 1060N - Whm Programming & Start-Up

Innovation - Edge [i] Installation, Operation, Maintenance Manual
CHAPTER 8 – WATER HEATER MANAGEMENT
OMM-0143_A • GF-216 • 9/6/2019 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page 129 of 170
8.8 WHM PROGRAMMING & START-UP
All required hardware installation and network wiring must be completed before configuring the
WHM parameters into the WHM Manager and Client units. In addition, the required menu
entries must be determined based on the descriptions in the previous sections.
AERCO recommends that the WHM Manager be set up first. By doing so, the Manager will
“push” most of the operating parameters to each WHM Client when they are brought on-line.
For clarity, the instructions below assume that the WHM Manager and Clients will be
consecutively numbered, starting at 1 (WHM Manager), although that’s not required.
Complete the instructions below on the unit designated as the WHM Manager:
WHM Manager Programming & Start-Up Procedure
1. Go to: Main Menu → Advanced Setup → WHM Cascade → Cascade Configuration,
then configure the following parameters:
a. Set the WHM Unit Mode to WHM Manager.
b. You have the option of designating one of the units in the WHM Cascade as a Backup
Manager. If the WHM Manager fails, manager functionality will automatically transfer to
the designated Backup Manager. To use this functionality, enable the Auto-Manager
Transfer parameter, then specify the address of the Backup Manager in the Backup
Manager Addr parameter. You can also enter a delay before transferring manager
functionality in the Auto-Manager Timer parameter.
2. Go to: Main Menu → Advanced Setup → WHM Cascade → Application Configuration.
3. Set the WHM Setpoint parameter to the desired temperature.
4. Go to: Main Menu → Advanced Setup → WHM Cascade → Cascade Comm and
configure the following parameters:
Figure 8.8: WHM Manager Cascade Communication Screens
a. Specify the address of the WHM Manager in the Unit Address parameter.
b. Specify the minimum and maximum address in the Cascade in the Min Address and
Max Address parameters (typically 1 to the maximum number of units in the
cascade).
c. Set the communication parameters in the Cascade Baud Rate, Network Timeout
and Error Threshold parameters.
d. Specify the Plant Failsafe Mode, which determines what the entire plant does if the
WHM Manager loses communication with the WHM Client units.