B&D Mfg Smart - Manual (Page 13)

13
ALL THE PUMP YOU NEED AND MORE
Revised 7-5-12
Fill and Start Procedure
Heat Pump Balancing Procedure: How to set drive pressure setting –
1. After the complete piping system is purged of air, each heat pump circuit can then be balanced for proper flow.
2. Make sure all control valves are in a closed position.
3. Allow flow to the heat pump with the larges pressure drop by manually opening the control valve.
4. Set the drive parameters B5-19 to operate at the following, based on nominal size of the complete heat pump
system (3 GPM/ton).
 Systems 30 tons or less (set drive parameter B5-19 to ‘15’). Drive pressure set to 15 psi.
 Systems 30-60 tons (set drive parameter B5-19 to ‘18’). Drive pressure set to 18 psi.
5. Measure the pressure drop across this coil to ensure the proper flow rate.
 If the flow rate is greater than required flow, then close a valve on the dedicated circuit until the desired flow
rate is reached.
 If the flow rate is not to the design flow, then proceed to the next step.
6. You must hit the “STOP” button on the drive. Go to the Set Up Menu by hitting the up arrow until the LED
shows “STUP”.
 You will see the home screen “u” = 0 (frequency reference).
 Hit the down arrow three times until you see “STUP” (Set Up Menu), then press Enter. “APPL” (Application
Menu) will then be shown.
 Hit up arrow until you see B5-19, then press Enter. Change system pressure from “0” (0015.0) to psi
(0017.0) by pressing the “right arrow/reset” key over to the desired integer, change the number by hitting
the up arrow to desired psi (0017.0), then press Enter.
 The B5-19 will then be shown blinking
 Hit escape key two times (Home screen frequency reference “u” = 0).
7. Press the “Run” button on the drive, then return to Step 5 above, to evaluate the flow rate for the one heat
pump, by pressure drop across the coil.
8. Once you have reached this flow rate and this is the largest pressure drop, you can then set the remaining flow
rates of the other heat pumps. This can be done by allowing flow to the next heat pump in line, while the first
one remains running.
9. The remaining heat pumps can be adjusted for flow by restricting the flow of the water outside of the heat
pumps. You must follow the manufacturer’s recommendation for pressure drop to evaluate the flow rate
through each of the units. If you have any questions, please call your local distributor for further instructions.
LOOP BYPASS
FLOW
CTR
VFD
HP1 HP2 HPn
H
EAT
PUM
P
BY
PAS
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