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The compressor and outdoor fan motor will begin to ramp
up and reach 100% design capacity within 3 minutes. They
will continue to operate at 100% design capacity for the
duration of charge mode.
Exiting Charge Mode
To exit the charging mode, remove the Charge Mode
Jumper from the Charge Mode Pins. The system will
be in Charge Mode for a maximum time of 60 minutes
and will automatically exit the charge mode and resume
normal operation after 60 minutes even if the charge mode
jumper is left in place. To extend the charge mode beyond
60 minutes, ensure the cooling/heating demand, blower
demand and appropriate reversing valve demand are
available and reapply the charge mode jumper.
NOTE: If compressor demand is lost during charge mode
period, then the compressor and fan will cease to operate,
and the unit will enter into a delay timer for 3 minutes.
Repeat the charging mode procedure to get back into
charge mode.
Cooling Operation Mode Jumper
The Cooling Operation Mode Jumper is only used on
applications installed with a conventional 24VAC heat
pump thermostat. In applications with a conventional
24VAC heat pump thermostat, the compressor capacity is
controlled to maintain the target suction pressure setpoint.
The Cooling Operation Mode Jumper has three selectable
cooling modes. The three modes are Efficiency (Jumper
installed on Pins 1 & 2), Normal Mode (Jumper installed
on Pins 2 & 3) and Comfort Mode (Jumper Removed).
The factory default position is the Efficiency Mode. The
Efficiency mode has a variable suction pressure setpoint
that will vary with the outdoor temperature; as the outdoor
temperature increases the suction pressure setpoint will
decrease. When the Cooling Operation Mode jumper
is installed in the "Normal Mode" the suction pressure
setpoint is 135 psig.
When the Cooling Operation Mode jumper is installed in
the "Comfort Mode" the suction pressure setpoint is 125
psig.
Operation Mode
Jumper
Jumper
Position
Efficiency (default)
Pin 1 to Pin 2
Normal
Pin 2 to Pin 3
Comfort
Jumper Off
Table 8. Cooling Operation Mode Jumper
(Conventional 24VAC Thermostats Only)
508311G01 / 31-5000754
Target Suction
Pressure Setting
Variable based on OAT
135 PSIG
125 PSIG
Issue 2250
Heating Operation Mode Jumper
The Heating Operation Mode Jumper is only used on
applications installed with a conventional 24VAC heat
pump thermostat. In applications with a conventional
24VAC heat pump thermostat, the compressor capacity is
controlled to maintain the target liquid pressure setpoint.
The Heating Operation Mode Jumper has two selectable
heating modes. The two modes are Efficiency (Jumper
installed on Pins 1 & 2) and Comfort Mode (Jumper
Removed). The factory default position is the Efficiency
Mode. The Efficiency mode has a variable liquid pressure
setpoint that will vary with the outdoor temperature; as
the outdoor temperature decreases, the liquid pressure
setpoint will increase. When the Operation Mode jumper is
installed in the "Comfort Mode" the liquid pressure setpoint
is 425 psig.
Operation Mode
Jumper
Jumper
Position
Efficiency (default)
Pin 4 to Pin 5
Comfort
Jumper Off
Table 9. Heating Operation Mode Jumper
(Conventional 24VAC Thermostats Only)
Figure 12. Operation Mode Jumper
Target Liquid Pressure
Setting
Variable based on OAT
425 PSIG
Page 19 of 26
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