Bell & Gossett V1000840 Ultra Setter Large Pressure Independent Control Valves - Manual (Page 13)

Operation
Recommended operating procedures
WARNING:
• Burn hazard. Water temperatures higher than 100°F (38°C) can be dangerous. Take
all necessary precautions to prevent water or steam leakage.
• Hot water leakage can occur from readout valves during probe insertion and during
hookup of readout kit. Follow the safety instructions supplied with readout probes
and readout kits.
• Installation and maintenance must be performed by a qualified professional.
CAUTION:
Avoid pipe strain. This can cause breakage and water loss over time.
Safety rules
• Service should not be performed on any valve in an active hydronic loop.
• Before attempting to make any required adjustments, properly isolate and drain the
branch loops or system that require service and allow the valves to reach a safe
handling temperature and zero pressure condition.
• Use proper safety equipment including gloves, goggles, or similar tools to avoid
contact with system fluids and common hazards.
• Failure to follow these instructions could result in personal injury and property
damage.
1. Ensure that the GPM scale is set for the desired flow rate and that the valve is fully
open.
2. Using Bell & Gossett RP250-B Readout Probes, attach a Bell & Gossett differential
pressure readout kit to the readout valves (P/T ports) on the desired valve.
3. Measure the pressure differential across the readout valves (P/T ports) on the valve
flanges. Confirm that the value of the pressure differential obtained is greater than the
minimum value indicated in the product submittal required to achieve the desired
flow rate.
4. Repeat the process for all valves on the branch, if required.
5. Measure the flow rate indicated at the flow measurement device on the branch, if
available. Confirm that the value recorded is equal to the desired flow. If it is not, then
investigate the causes and if necessary, report to the designer.
6. When a flow measurement device is not present on the branch, measure the
differential pressure across the valve and verify the minimum differential pressure
listed in the submittal to ensure the valve can achieve the desired flow rate.
7. Repeat this procedure as needed until all valves in the system have been set and
differential pressure has been verified.
NOTICE:
Make sure the valve is fully open when flushing or pressure testing the hydronic
system. Strong pressure impacts, or water hammer, can damage closed valves.
Operation
Ultra Setter ™ Pressure Independent Control Valves Installation, Operation and Service Manual 11