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Unit Startup Checklist/Unit Startup Steps
Before Powering Unit, Check The Following:
• High voltage is correct and matches nameplate.
• Fuses, breakers and wire size correct.
• Low voltage wiring complete.
• Piping completed and water system cleaned and flushed.
• Air is purged from closed loop system.
• Isolation valves are open, water control valves or loop pumps wired.
• Condensate line open and correctly pitched.
• Transformer switched to 208V if applicable.
• Dip switches are set correctly, if applicable.
• Blower rotates freely
• Air filter is clean and in position.
• Service/access panels are in place.
• Return air temperature is between 50-80°F heating and 60-95°F cooling.
1. Check air coil cleanliness to ensure optimum performance. Clean as needed according to maintenance guidelines. To
obtain maximum performance the air coil should be cleaned before startup. A 10-percent solution of dishwasher
detergent and water is recommended for both sides of coil, a thorough water rinse should follow.
Startup Steps
Note: Complete the Equipment Start-Up/Commissioning Check Sheet during this procedure. Refer to thermostat operating instructions
and complete the startup procedure.
1. Initiate a control signal to energize the blower motor. Check blower operation.
2.
Initiate a control signal to place the unit in the cooling mode. Cooling setpoint must be set below room temperature.
3.
Be sure that the compressor and water control valve or loop pump(s) are activated.
4.
Verify that the water flow rate is correct by measuring the pressure drop through the heat exchanger using the P/T plugs and
comparing to unit capacity data in specification catalog.
5.
Check the temperature of both the supply and discharge water (Refer to Unit Operating Parameters tables).
6.
Check for an air temperature drop of 15°F to 25°F across the air coil, depending on the fan speed and entering water temperature.
7.
Adjust the cooling setpoint above the room temperature and verify that the compressor and water valve or loop pumps deactivate.
8.
Initiate a control signal to place the unit in the heating mode. Heating set point must be set above room temperature.
9.
Check the temperature of both the supply and discharge water (Refer to Unit Operating Parameters tables).
10. Check for an air temperature rise of 20°F to 35°F across the air coil, depending on the fan speed and entering water temperature.
11. Adjust the heating setpoint below room temperature and verify that the compressor and water valve or loop pump deactivate.
12. During all testing, check for excessive vibration, noise or water leaks. Correct or repair as required.
13. Set system to desired normal operating mode and set temperature to maintain desired comfort level.
14. Instruct the owner/operator in the proper operation of the thermostat and system maintenance.
Note: Be certain to fill out and forward all warranty registration papers.
AFFINITY LOW SILL SERIES INSTALLATION MANUAL
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