Digital-Flo Commissioning Guide

Digital-Flo Commissioning Guide
Armstrong Hot Water, Inc. – Digital-Flo Commissioning Guide
221 Armstrong Blvd., Three Rivers, Michigan 49093 – U.S.A. Phone: (269) 279-3602
Fax: (269) 279-3130
The following will go through a step by step process for commissioning any/all Digital-Flo water
heaters. Armstrong Hot Water, Inc. recommends that an authorized representative perform the
commissioning process and subsequently submits a Digital-Flo Commissioning Report to the
factory to keep on file.
1. Perform a visual overview and confirmation that the Digital-Flo is installed per our installation
schematics located in our IOM’s
a. Ensure all water supply lines are present and in the correct location
i. Hot water
ii. Cold water
iii. Mixed Water
iv. Recirculation return from the system loop to the Digital-Flo
b. Ensure all steam/condensate lines are present and in the correct location
2. Power the Digital-Flo ensuring the display on the front of the DRV is illuminated
a. Ensure the safety shut off valve (blue actuator valve on hot supply line to DRV) opens
3. Flood the system slowly and in the following sequence:
a. Cold water supply
b. Mixed water outlet
c. Hot water supply
4. Create a demand in the system loop
a. Open 4-5 fixtures (slop sinks, showers, baths, etc…)
5. Turn on recirculation pump(s)
a. Ensure there is sufficient minimum flow (DRV40 ≥ 5gpm; DRV80 ≥ 10gpm)
6. Open the condensate discharge isolation valves on the Digital-Flo
7. Supply steam to the Digital-Flo slowly
a. Purge any condensate/water in the system
b. Ensure steam pressure does NOT exceed 15psi
8. Ensure all supply temperatures and pressures are sufficient
a. Hot water
b. Cold water
c. Recirculation return
9. If the DRV is at the desired set point (which was already pre-programmed at the factory with info
supplied with the order) you may skip to step 12
10. Connect to the programming software via proper adapter (Gen. 1 = IrDA to USB Adapter, Gen. 2 =
RS485 to USB Adapter
Intelligent System Solutions® S T E A M ● A I R
armstronginternational.com
● HOT WATER
Armstrong Hot Water, Inc. – Digital-Flo Commissioning Guide
221 Armstrong Blvd., Three Rivers, Michigan 49093 – U.S.A. Phone: (269) 279-3602
Fax: (269) 279-3130
11. Continue DRV set up programming following IOM pages 16-22 & 32
12. Shut off all demand and allow recirculation pump to continue to run
13. Monitor DRV outlet and ensure is maintaining set point
a. It make take some time for the recirculation return temperature to rise to an appropriate level
due to it being a new start up and system
Intelligent System Solutions® S T E A M ● A I R
armstronginternational.com
● HOT WATER
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