Tranquility
®
Digital (DXM2)—Troubleshooting Guide
Rev.: 10 March, 2015
24
Geothermal Heating and Cooling
Typical Water Source Refrigeration Circuit (Heating Cycle)
A-G
LT1 to LWT in Heating
TZ Units 5°-10° Difference
TE Units 0°-8° Difference
LT1 will be colder!
Water-to-Water (Heating Only) RP932
Troubleshooting Form
Customer: Loop Type: Startup Date:
Model #: Serial #: Antifreeze Type & %:
Complaint:
Description Heating Notes
Water Side Analysis
1 Water In Temp.
2 Water Out Temp. Temp. Diff. =
3 Water In Pressure
4 Water Out Pressure
4a Pressure Drop
4b GPM
Heat of Extraction (Absorption) or Heat of Rejection:
HE or HR (Btuh) =
Enter HE or HR:
Flow Rate (GPM) x Temp. Diff (deg F) x Fluid Factor
Refrigerant Analysis
5 Suction Temp.
6 Suction Pressure
6a Saturation Temp.
6b Superheat
7 Discharge Temp.
8 Discharge Pressure
8a Saturation Temp.
8b Subcooling
9 Liquid Line Temp
10 Load Water In Temp.
11 Load Water Out Temp. Temp. Diff. =
12 Load Water In Pressure
13 Load Water Out Pressure
13a Pressure Drop
13b GPM
Voltage
Compress Amps
COMPRESSOR
DISCHARGE
SUCTION
HWG**
EXPANSION
VALVE
FILTER
DRIER*
5
COAX
4
2
3
1
8
7
6
EVAPORATOR (HEATING)
REFRIG FLOW - HEATING
Source
COAX
1210
1311
CONDENSER (HTG)
WATER-TO-WATER UNITS
Load
* Filter drier not used
for some R-22 units.
** Turn off HWG before
troubleshooting.
9
LT1:
LIQUID
LINE
REFRIGERANT: R-22 R-410A
Fluid Factor:
500 (Water); 485 (Antifreeze)
Unit Operating Conditions
A-G