ClimateMaster DC Series Installation Manual download pdf (Page 37)

Residential H&V - 60Hz R22 &R410A

Rev.: 22 Dec, 2008

climatemaster.com

7. If unit fails to operate, perform troubleshooting analysis

(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 start-up. A 10% solution of dishwasher

detergent and water is recommended.

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.

Unit Start-Up Procedure

Short test pins

together to enter Test

Mode and speed-up

timing and delays for

20 minutes.

Figure 29: Test Mode Pins

c. Verify that the compressor is on and that the water

ﬂ ow rate is correct by measuring pressure drop

through the heat exchanger using the P/T plugs and

comparing to Tables 9a through 9c.

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 ﬁ lled

to provide a water seal.

e. Refer to Table 10. 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 11 through 13. Verify correct

water ﬂ ow by comparing unit pressure drop across

the heat exchanger versus the data in Tables 9a

through 9c. 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 ﬂ ow rate in U.S. GPM, determined

by comparing the pressure drop across the heat

exchanger to Tables 9a through 9c.

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 ﬁ ve (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 10. 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 11 through 13. Verify correct

water ﬂ ow by comparing unit pressure drop across

the heat exchanger versus the data in Tables 9a

through 9c. 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 ﬂ ow rate in U.S. GPM, determined

by comparing the pressure drop across the heat

exchanger to Tables 9a through 9c.

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.

 WARNING! 

 CAUTION! 

CAUTION! Verify that ALL water control valves are open

and allow water ﬂ ow prior to engaging the compressor.

Freezing of the coax or water lines can permanently

damage the heat pump.

Section 10 - Packaged IOM 37 4/24/09 3:16:53 PM

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ClimateMaster DC Series Installation Manual Page 37

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