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20 SXIH-SVX01B-EN
Unit Startup Procedures
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. Check all electrical connections for
tightness.
2. Be sure all unit accessories are
properly set and installed.
3. Inspect all ductwork and duct
connections.
4. Check for proper belt tension.
5. Check fan drive sheaves, pulleys, and
bearings.
Unit Startup Checklist
1. Set thermostat to Off position
2. Engage power supply by closing power
disconnect
3. Switch thermostat to fan position and
adjust temperature setting below room
temperature. Evaporator fan should
start.
4. Check evaporator section for proper
operation
5. Switch thermostat to cool position and
adjust temperature setting to below
room temperature. The evaporator fan,
condenser fan(s), and compressor(s)
should start.
Note: These units are equipped with high
efficiency scroll compressors. Check for
proper scroll rotation prior to operating
this unit.
WARNING
Rotating Components!
During installation, testing, servicing
and troubleshooting of this product it
may be necessary to measure the
speed of rotating components. Have a
qualified or licensed service individual
who has been properly trained in
handling exposed rotating
components, perform these tasks.
Failure to follow all safety precautions
when exposed to rotating
components could result in death or
serious injury.
6. Check condenser fan for proper
rotation. If fan rotation is incorrect,
switch thermostat to Off position and
disconnect power. Reverse two phase
leads at disconnect and return back to
Step 1 of startup.
7. Allow unit to run until all system
temperatures and pressures stabilize.
8. Check systems for proper operation
and performance. Observe unit in
operation and check for unusual noise,
vibration, belt and fan clearances.
StartupInstallation