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ROBERTS GORDON
®
ULTRAVAC™ C
ONTROLLER
I
NSTALLATION
M
ANUAL
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Step 8.1.3
After setting end vent vacuums between
2.5" wc and 3.0" wc, while all the burners are still
operating, use the down arrow button on the VFD to
reduce the frequency of the output signal to the
pump. Reduce the frequency of the VFD until the
manometer at each of the end vents reads 1.2" wc -
1.5" wc, Make note of this frequency setting below.
The frequency is found on the VFD’s LCD screen.
1.2" w.c. - 1.5" wc VFD Frequency Setting
Step 8.1.4
Return to the PC and click the pump and
zones to "OFF".
Record Frequency Setting Here:
Summary of Contents for UltraVac URVBNC
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Page 7: ...SECTION 1 INTRODUCTION 3 of 65 FIGURE 1 Connected Components ...
Page 8: ...ROBERTS GORDON ULTRAVAC CONTROLLER INSTALLATION MANUAL 4 of 65 Connected Components continued ...
Page 48: ...ROBERTS GORDON ULTRAVAC CONTROLLER INSTALLATION MANUAL 44 of 65 FIGURE 25 End Vent Vacuum ...
Page 53: ...SECTION 9 TROUBLESHOOTING 49 of 65 Troubleshooting Flow Chart continued ...
Page 55: ...SECTION 9 TROUBLESHOOTING 51 of 65 Troubleshooting Flow Chart continued ...
Page 57: ...SECTION 9 TROUBLESHOOTING 53 of 65 FIGURE 29 Troubleshooting Flow Chart BACnet ...
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