ClimateMaster Tranquility TCH 024 - Unit Start-up Procedure

climatemaster.com
67
Tranquility
®
Compact (TC) Series
Rev.: July 7, 2020
THE SMART SOLUTION FOR ENERGY EFFICIENCY
Unit Start-Up Procedure
Unit Start-up Procedure
1. Turn the thermostat fan position to “ON”. Blower
should start.
2. Balance air 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 7. During start-up checks,
loop water temperature entering the heat pump should
be between 60°F [16°C] and 95°F [35°C].
5. Two 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 ensure 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 ve minute time delay in the
control circuit that can be eliminated on the CXM/
DXM2 control board as shown in Figure 23. See
controls description for details.
c. Verify that the compressor is on and that the water
ow rate is correct by measuring pressure drop
through the heat exchanger using the P/T plugs
and comparing to table 9.
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
lled to provide a water seal.
e. Refer to table 11. Check the temperature of both
entering and leaving water. If temperature is within
range, proceed with the test. Verify correct water
ow by comparing unit pressure drop across the
heat exchanger versus the data in table 9. 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 ow rate in U.S.
GPM, determined by comparing the pressure drop
across the heat exchanger to table 9. 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 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 11. 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 table 10. Verify correct
water ow by comparing unit pressure drop across
the heat exchanger versus the data in table 9. 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 (kW) = TD xGPM x 500, where TD is the
temperature difference between the entering and
leaving water, and l/s is the 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 ensure 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/DXM2 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.