ClimateMaster GT-PX Indoor Split Series Installation Manual download pdf (Page 43)

be between 20°F and 30°F [11°C and 17°C].

f. Check for vibration, noise, and water leaks.

8. 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.

9. When testing is complete, set system to maintain

desired comfort level.

10. 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.

b. Check for cool air delivery at the unit grille within a

few minutes after the unit has begun to operate.

Note: Units have a Ä ve minute time delay in the

control circuit that can be bypassed on the CXM/

DXM control board as shown below in Figure 20. See

controls description for details.

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

Å ow rate is correct by measuring pressure drop

through the heat exchanger using the P/T plugs and

comparing to Table 14.

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 Ä lled

to provide a water seal.

e. Refer to Table 15. 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 16a through 16d.

Verify correct water Å ow by comparing unit pressure

drop across the heat exchanger versus the data in

Table 14. 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 Å ow rate in U.S. GPM, determined

by comparing the pressure drop across the heat

exchanger to Table 14.

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.

7. Allow Ä 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 15. 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 16a through 16d

Verify correct water Å ow by comparing unit pressure

drop across the heat exchanger versus the data in

Table 14. 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 Å ow rate in U.S. GPM, determined

by comparing the pressure drop across the heat

exchanger to Table 14.

Check air temperature rise across the air coil when

compressor is operating. Air temperature rise should

Short test pins together

to enter Test Mode and

speed-up timing and delays

for 20 minutes.

Figure 29: Test Mode Pins

ѥWARNING! ѥ

ѥCAUTION! ѥ

Unit Start-Up Procedure

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.

CAUTION! Verify that ALL water control valves are open

and allow water À ow prior to engaging the compressor.

Freezing of the coax or water lines can permanently

damage the heat pump.

Residential Split Units - 60Hz Puron

Rev.: 6 Dec., 2011

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ClimateMaster GT-PX Indoor Split Series Installation Manual Page 43

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