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Unit Startup cont.
Refrigerant Monitoring
(Standard Sensor Kit)
The Refrigerant Monitoring Kit for compressors A and B
includes two pressure transducers, and three temperature
sensors, heating liquid line(FP2), suction temperature and
existing cooling liquid line (FP1). These sensors allow the
measurement of discharge and suction pressures, suction
and liquid line temperatures as well as superheat and
subcooling. This information will only be displayed on the
AID Tool. Ensure the Refrigerant Monitoring has been
setup by accessing the 'Sensor Kit Setup" in the AID Tool
and complete the following:
Once sensors are installed for discharge pressure, suction
pressure, suction, liquid line cooling and liquid line heating
no further setup is required.
a. Turn on Unit in Heating or Cooling .
b. Use the AID Tool to view the refrigerant performance in
the 'Refrigerant Monitor' screen.
c. Refrigerant monitoring can be read on any of the
following components:
i. AID Tool – instantaneous information only
Performance Monitoring
(Standard Sensor Kit)
The Performance Monitoring Kit includes three temperature
sensors, source entering and leaving water, load leaving
water temperature. Performance monitoring can be read on
the following component:
i. AID tool - instantaneous information only
10-15 TON HYDRONIC HEAT PUMP INSTALLATION GUIDE
Startup Steps
• Set thermostat control above cooling setpoint.
• Set thermostat control in cooling mode.
• Slowly reduce the control setting until both the
compressor and water control valve/loop pumps are
activated. Verify that the compressor is on and that
the water flow rate is correct by measuring pressure
drop through the heat exchanger and comparing to the
Pressure Drop table. Check for correct rotation on three
phase scroll compressors. Switch any two power leads
at the L1, L2, and L3 line voltage termination block if
incorrect.
• Perform a cooling capacity test by multiplying GPM x ΔT
x 485 (antifreeze/water). Use 500 for 100% water. Check
capacity against catalog data at same conditions.
• Set control to "OFF" position.
• Leave unit "OFF" for approximately five (5) minutes to
allow pressure to equalize.
• Adjust control below heating setpoint.
• Set control in "HEAT" position mode.
• Slowly increase the control setting until both compressor
and water control valve/loop pumps are activated. The
reversing valve should be heard changing over.
• Perform a heating capacity test by multiplying GPM x ΔT
x 485 (antifreeze/water). Use 500 for 100% water. Check
capacity against catalog data at same conditions.
• Check for vibrations, noise and water leaks.
• Set system to maintain desired setpoint.
• Instruct the owner/operator of correct control and system
operation.
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