Troubleshooting Guide -
Tranquility
®
Digital (DXM2) Packaged Units
Rev.: 01/15/14
22
Geothermal Heat Pump Systems
Commissioning Worksheet: Check Test and Start
A-G
Continued on following page
Installation Data
Job Name: Check Test Date:
City: State or Province:
Zip or Postal Code:
ClimateMaster Model Number:
ClimateMaster Serial Number:
Job site Unit ID # (HP # or Location):
General Contractor:
Mechanical Contractor:
Technician Performing Commissioning/Start-Up Name:
Employer:
Acquire all equipment data from measurements at locations indicated in fi gure at bottom of page:
Equipment Data
FLOW RATE
EWP - LWP = ∆P
1
EWP - PSI IN minus
2
LWP - psi Out equals ∆P
The fi rst step in fi nding GPM is to subtract leaving water pressure from entering water pressure
using the same pressure gauge. The difference between the two is referred to as ∆P. ∆P can be
converted to GPM by looking in the equipment specifi cation catalog. Caution: ∆P does not
equal GPM Note: A conversion must be made using specifi cation catalog data to fi nd
GPM from (DeltaP - pressure differential) ∆P measurements.
LOOP FLUID TEMPERATURE Rise/Drop through Coaxial Heat Exchanger
EWT - LWT = ∆T
3
EWT - °F IN minus
4
LWT - °F Out equals Fluid ∆T
∆T is the rise or drop in the fl uid temperature as is passes through the Coaxial.
AIR TEMPERATURE Rise/Drop through the air coil
∆T X CFM X 1.08=BTUH Sensible
5
EAT - °F IN minus
6
LAT - °F Out equals Air dT
Compressor
AIR
COIL
EXPANSION VALVE
Reversing Valve
COAX
5
CTS Performed In: Cooling Mode Heating Mode
IN
Discharge
Hot Gas
Suction
IN
EAT
Entering Air
Temperature °F
OUT
LAT
6
Loop Fluid Pressure (In PSI)
Loop Fluid Temperature ºF
OUT
1
3
2
4
EWP
EWT
LWP
LWT
Note: Always perform a
water side check before
using refrigerant gauges.
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