RTHC-SVN02C-EN
11
Start-up
It is recommended that the steps below are followed once the installation is
complete to insure proper operation.
WARNING
Hazardous Voltage!
Disconnect all electric power, including remote disconnects before servicing.
Follow proper lockout/tagout procedures to ensure the power can not be
inadvertently energized. Failure to disconnect power before servicing could
result in death or serious injury.
1.
Remove line power from valve. Manually crank condenser valve wide open. Set
condenser flow valve to obtain max water flow (correct pressure drop) per IOM.
2.
Configure with chiller OFF, condenser pump ON. Apply line power to valve, it
should move to 15% open. Remove power from valve.
3.
Measure water pressure drop across condenser. It should be 0.7 ft to 2.0 ft for
C1, C2, D1, D2, E1, E2, F2 and F3 condensers and 0.4 ft to 1.0 ft for BI, B2, E3,
Fl, Gl, G2 and G3 condensers. Go to step 7, if water side pressure drop is
correct.
4.
If pressure drop is not as described in step 2, remove line power from valve,
manually adjust valve opening with attached crank until proper condenser
pressure drop is obtained. Mark pointer location. Reset closed limit microswitch
to trip at this location / pressure drop.
5.
Leave transducer 4R1 connected to condenser pressure and arrange so
transducer 4R2 can be connected to either atmospheric or above 70 psi. Apply
24 VAC to 4U1 and line power to valve. Stroke valve open and closed by applying
and removing pressure to 4R2.
6.
Adjust valve closed position with zero adjustment so it coincides with closed
limit switch trip point that was adjusted in step 4. Cycle valve open by increasing
pressure to 4R2. It should be full open at 60 to 70 psid. Adjust span if not.
Recheck zero, if span is adjusted.
Warning
Live Electrical Components!
During installation, testing, servicing and troubleshooting of this product, it
may be necessary to work with live electrical components. Have a qualified
licensed electrician or other individual who has been properly trained in
handling live electrical components perform these tasks. Failure to follow all
electrical safety precautions when exposed to live electrical components could
result in death or serious injury.
7.
Let condenser pump run for at least 15 minutes with motorized valve in closed
position. Verify that pump doesn't overheat when throttled. Check that
condenser flow switch makes with this low flow. Disconnect flow switch or use
a pressure switch if flow switch can't be adjusted low enough.
8.
Verify operation during a normal start. If valve overshoots and then re-closes,
increase damping on the 4U1 module. Valve should open and close as shown in
Figure 6.
