If Max Pump mode does not result in significant flow quickly, turn the
heat pump o and determine the reason for flow restriction (closed
valves, airbound, etc). Running the internal circulator for long periods
of time with no flow can damage the circulator.
Measured maximum flow rate in Max Pump mode:_________ GPM
For Ducted Systems: Ensure any dampers in the duct system are open, and
if ducting is shared between multiple heat pumps, then all heat pumps on
the duct system should be run and measured together. Initiate “Max Fan” on
the control interface, in the “Diagnose“ section (service jumper required on
terminals 24v and i7). Using a manometer or magnahelic guage, take a negative
pressure reading in the intake duct near the evaporator, and a positive pressure
reading in the discharge duct near the fan housing. Seal access holes when
done. The dierence between the two readings should not exceed 1.5” w.c.g.
Measured Discharge:_________ In. w.c.g.
Measured Intake:_________ In. w.c.g.
Startup Procedure and Checklist.
Verify 120v and primary power have been on for at least 12 hours before
running the unit.
Using the “Configuration” section of this manual and project documentation,
set the configuration options for this project on the control interface.
Verify incoming voltage is +/- 5% of ratings and +/-2% across phases with
your service tools.
Measured Voltage (Main): L1: _________ L2: _________ L3: _________ VAC
Measured Voltage (Secondary): L1: _________ VAC
Initiate “Max Pump” on the control interface, in the “Diagnose“ section (service
jumper required on terminals 24v and i7) Using the “Water Side Maximum
Flow” on Table 1, verify that the system meets or exceeds the maximum design
flow rate for your heat pump.
Startup Procedure
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