Tranquility THW - 50 & 60Hz R410A - ClimateMaster Geothermal Heat Pumps - Rev.: 30 June, 2008B
36
Table 8: Heat Exchanger Water
Pressure Drop
CXM/DXM Safety Control Reset
Lockout
- In Lockout mode, the Status LED will begin fast
flashing. The compressor relay is turned off immediately.
Lockout mode can be soft reset via the “Y” input or can be
hard reset via the disconnect. The last fault causing the
lockout will be stored in memory and can be viewed by
going into test mode.
Fault Retry
- In Fault Retry mode, the Status LED begins
slow flashing to signal that the control is trying to recover
from a fault input. The CXM control will stage off the
outputs and then “try again” to satisfy the thermostat "Y"
input call. Once the input calls are satisfied, the control
will continue on as if no fault occurred. If 3 consecutive
faults occur without satisfying the "Y" input call, then the
control will go to Lockout mode. The last fault causing the
lockout will be stored in memory and can be viewed by
going into test mode.
Consult the CXM/DXM AOM for complete descriptions.
Note: Units have a five minute time delay in the
control circuit that can be bypassed on the CXM PCB.
UNIT START-UP PROCEDURE
1. Adjust all valves to their full open position. Turn on
the line power to all heat pump units.
2. Operate each heat pump in the heating cycle.
Verify heat exchanger flow rates based upon table
7 and temperature drop/rise based upon unit
performance tables.
3. Establish a permanent operating record by logging the
unit operating conditions at initial start-up for each unit.
4. If a unit fails to operate, conduct the following checks:
a. Check the voltage and current. They should comply
with the electrical specifications described on the
unit nameplate.
b. Look for wiring errors. Check for loose terminal
screws where wire connections have been made on
both the line and low-voltage terminal boards.
c. Check the supply and return piping. They must be
properly connected to the inlet and outlet connections
on the unit.
d. If the checks described above fail to reveal the
problem and the unit still will not operate, contact a
trained service technician to ensure proper diagnosis
and repair of the equipment.
�
WARNING!
�
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.
�
WARNING!
�
WARNING! Verify ALL water controls are open and allow
water flow prior to engaging the compressor. Freezing of the
coax or water lines can permanently damage the heat pump.
Model
GPM
[l/m]
Pressure Drop psi [kPa]
30°F
[-1°C]
50°F
[10°C]
70°F
[21°C]
Source/Outdoor Coax
008
5.1 [19.3]
6.4 [24.3]
0.41 [2.82]
0.58 [4.03]
0.31 [2.14]
0.48 [3.28]
0.21 [1.45]
0.35 [2.41]
010
6.6 [25.0]
8.3 [31.5]
0.60 [4.13]
0.85 [5.68]
0.48 [3.31]
0.73 [4.90]
0.37 [2.55]
0.60 [4.03]
012
8.2 [31.1]
10.2 [38.7]
0.61 [4.20]
0.88 [6.09]
0.45 [3.10]
0.73 [5.02]
0.34 [2.34]
0.62 [4.29]
Model
GPM
[l/m]
Pressure Drop psi [kPa]
70°F
[21°C]
90°F
[32°C]
110°F
[43°C]
130°F
[54°C]
Load/Indoor Heat Exchanger
008
4.2 [15.9]
5.6 [21.2]
0.34 [2.34]
0.64 [4.41]
0.26 [1.79]
0.54 [3.72]
0.18 [1.24]
0.43 [2.96]
0.14 [0.97]
0.36 [2.48]
010
5.4 [20.5]
7.3 [27.7]
0.62 [4.27]
1.13 [7.79]
0.58 [4.00]
0.97 [6.68]
0.55 [3.79]
0.82 [5.65]
0.53 [3.65]
0.70 [4.82]
012
6.7 [25.4]
8.9 [33.7]
0.94 [6.48]
1.54 [10.61]
0.80 [5.51]
1.38 [9.51]
0.66 [4.55]
1.22 [8.41]
0.57 [3.93]
1.09 [7.51]
Multiply psi by 2.31 to obtain feet of head
Multiply kPa by 10 to obtain mBar
