C L I M A T E M A S T E R W A T E R - S O U R C E H E A T P U M P S
Tranquility
®
Compact Belt Drive (TCH/V) Series
Rev.: July 25, 2017
70
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
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. 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 fi ve minute time delay in
the control circuit that can be eliminated on the
CXM/DXM control board as shown below in
Figure 21. See controls description for details.
d.
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.
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 fi lled 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 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.
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.
