Troubleshooting Worksheet - Zehnder Rittling HP Series Installation, Operation And Maintenance Manual

Troubleshooting worksheet

This form MUST be submitted to Zehnder Rittling Sales Support staff prior to shipment of replacement parts.
Date
installed
Technician
Power
Fan
Air
motor
side
volts
Refrigeration
Compressor
side
volts
Note: All Zehnder Rittling Water Source Heat Pumps are pre-charged and factory run tested. The R410A refrigerant charge used on all unit chassis models
is weighed into exact amounts, refrigeration gauges should only be attached as a last resort. Failure to replace lost charge may result in loss of capacity/
efficiency and equipment life.
Cooling Cycle
Inlet air
Air
temperature
side
(return) °F
Water inlet
temperature
°F
Water
side
Water outlet
temperature
°F
Compressor
suction side
temperature °F
Compressor
Refrigeration
suction side
side
pressure psig
Expansion valve
temperature,
entering valve °F
Heating Cycle
Inlet air
Air
temperature
side
(return) °F
Water inlet
temperature
Water °F
side
Water outlet
temperature
°F
Compressor
suction side
temperature °F
Compressor
Refrigeration
suction side
side
pressure psig
Expansion valve
temperature,
entering valve °F
Note: Before recording above data, each cycle should be run for 10-15 minutes or until stable.
Model
number
Serial
number
Fan
motor
amps
Total
volts
Compressor
amps
Outlet air
temperature
(supply) °F
Pressure
psig
Pressure
psig
Compressor
discharge side
temperature °F
Compressor
discharge side
pressure psig
Expansion valve
temperature,
leaving valve °F
Outlet air
temperature
(supply) °F
Pressure
psig
Pressure
psig
Compressor
discharge side
temperature °F
Compressor
discharge side
pressure psig
Expansion valve
temperature,
leaving valve °F
Total
amps
43