78
ClimateMaster Water-Source Heating and Cooling Systems
CLIMATEMASTER WATER-SOURCE HEAT PUMPS
Packaged Units
Rev.: 1/06/09B
Unit Start-up Procedure
1. Turn the thermostat fan position to “ON”. Blower
should start.
2. Balance air fl ow at registers.
3. Adjust all valves to their full open positions. Turn on
the line power to all heat pumps.
4. Room temperature should be within the minimum-
maximum ranges of table 9. During start-up checks,
loop water temperature entering the heat pump
should be between 60°F [16°C] and 95°F [35°C].
5.
T
wo factors determine the operating limits of
ClimateMaster heat pumps, (a) return air temperature,
and (b) water temperature. When any one of these factors
is at a minimum or maximum level, the other factor must
be at normal level to insure proper unit operation.
a. Adjust the unit thermostat to the warmest setting.
Place the thermostat mode switch in the “COOL”
position. Slowly reduce thermostat setting until the
compressor activates.
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 fi ve minute time delay in the
control circuit that can be eliminated on the CXM/
DXM control board as shown below in Figure 28.
See controls description for details.
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 10a through 10e.
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 17. 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 12 through
15. Verify correct water fl ow by comparing unit
pressure drop across the heat exchanger versus
the data in tables 10a through 10e. Heat of
rejection (HR) can be calculated and compared to
submittal data capacity pages. The formula for HR
for systems with water is as follows:
HR (Btuh) = 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 8a through
8e. In S.I. units, the formula is as follows: HR (kW)
= TD x l/s x 4.18.
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 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 17. 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 16. Verify correct
water fl ow by comparing unit pressure drop across
the heat exchanger versus the data in tables 10a
through 10e. 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 (Btuh) = 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 10a through
10e. In S.I. units, the formula is as follows: HE
(kW) = TD x l/s x 4.18.
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
(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 FORWARD ALL WARRANTY
REGISTRATION PAPERS TO CLIMATEMASTER.
Note: If performance during any mode appears abnormal,
refer to the CXM/DXM 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.
Unit Start-Up Procedure
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