T h e Q u a l i t y L e a d e r i n C o n d i t i o n i n g A i r
Unit Start-Up Procedure
flow rate is correct by measuring pressure drop through the heat exchanger using the P/T plugs and comparing to Tables 12a through 12b.
d.Check the elevation and cleanliness of the condensate lines. Dripping may be a sign of a blocked line. Check that the condensate trap is filled to provide a water seal.
e.Refer to Table 13. Check the temperature of both entering and leaving water. If temperature is within range, proceed with the test. If temperature is outside of the operating range, check refrigerant pressures and compare to Tables 14 and 15. Verify correct water flow by comparing unit pressure drop across the heat exchanger versus the data in Tables 12a through 12b. Heat of rejection (HR) can be calculated and compared to catalog data capacity pages. The formula for HR for systems with water is as follows:
HR = TD x GPM x 500, where TD is the temperature difference between the entering and leaving water, and GPM is the flow rate in U.S. GPM, determined by comparing the pressure drop across the heat exchanger to Tables 12a through 12b.
f.Check air temperature drop across the air coil when compressor is operating. Air temperature drop should be between 15°F and 25°F [8°C and 14°C].
g.Turn thermostat to “OFF” position. A hissing noise indicates proper functioning of the reversing valve.
6.Allow five (5) minutes between tests for pressure to equalize before beginning heating test.
a.Adjust the thermostat to the lowest setting. Place the thermostat mode switch in the “HEAT” position.
b.Slowly raise the thermostat to a higher temperature until the compressor activates.
c.Check for warm air delivery within a few minutes after the unit has begun to operate.
d.Refer to Table 13. Check the temperature of both entering and leaving water. If temperature is within range, proceed with the test. If temperature is outside of the operating range, check refrigerant pressures and compare to Tables 14 and 15 Verify correct water flow by comparing unit pressure drop across the heat exchanger versus the data in Tables 12a through
12b. Heat of extraction (HE) can be calculated and compared to submittal data capacity pages. The formula for HE for systems with water is as follows:
HE = TD x GPM x 500, where TD is the temperature difference between the entering and leaving water, and GPM is the flow rate in U.S. GPM, determined by comparing the pressure drop across the heat exchanger to Tables 12a through 12b.
e.Check air temperature rise across the air coil when compressor is operating. Air temperature rise should be between 20°F and 30°F [11°C and 17°C].
f.Check for vibration, noise, and water leaks.
7.If unit fails to operate, perform troubleshooting analysis
R e s i d e n t i a l S p l i t - 6 0 H z R 2 2 & R 4 1 0 A
R e v. : 5 J u n e , 2 0 0 8
(see troubleshooting section). If the check described fails to reveal the problem and the unit still does not operate, contact a trained service technician to insure proper diagnosis and repair of the equipment.
8.When testing is complete, set system to maintain desired comfort level.
9.BE CERTAIN TO FILL OUT AND RETURN ALL WARRANTY REGISTRATION PAPERWORK.
Note: If performance during any mode appears abnormal, refer to the CXM section or troubleshooting section of this manual. To obtain maximum performance, the air coil should be cleaned before
x WARNING! x
WARNING! When the disconnect switch is closed, high voltage is present in some areas of the electrical panel. Exercise caution when working with energized equipment.
x CAUTION! x
CAUTION! Verify that ALL water control valves are open and allow water flow prior to engaging the compressor. Freezing of the coax or water lines can permanently damage the heat pump.
Figure 29: Test Mode Pins
Short test pins together to enter Test Mode and
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