C l i m a t e M a s t e r Wa t e r-S o u rc e H e a t P u m p s
78
Tranquility
®
Compact High Capacity (TC_L) Series
R e v. : O c t o b e r 5 , 2 0 2 1
C L I M AT E M A S T E R WAT E R - S O U R C E H E AT P U M P S
Unit Start-Up Procedure
1. Turn the thermostat fan position to “ON”. Blower
should start.
2.
Balance air flow 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 9a. 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.
c. Note: Units have a five minute time delay in the
control circuit that can be eliminated on the CXM/
DXM control board as shown below in Figure 22.
See controls description for details.
d. Verify that the compressor is on and that the water
flow rate is correct by measuring pressure drop
through the heat exchanger using the P/T plugs and
comparing to table 10.
e. 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. Check the temperature of
both entering and leaving water. If temperature
is within range table, proceed with the test. If
temperature is outside of the operating range, check
refrigerant pressures and compare to tables 11a
through 11b. Verify correct water flow by comparing
unit pressure drop across the heat exchanger versus
the data in table 10. 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 flow rate in U.S. GPM,
determined by comparing the pressure drop across
the heat exchanger to table 10. 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 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 12. 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 11a through 11b.
Verify correct water flow by comparing unit pressure
drop across the heat exchanger versus the data in
table 10. 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 flow rate in U.S. GPM,
determined by comparing the pressure drop across
the heat exchanger to table 10.
e. In S-I units, 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/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.