INSTALLATION INSTRUCTIONS

3-phase R-410A Split System Heat Pump

 

 

START-UP PROCEDURE

1.Set indoor thermostat selector switch to OFF.

2.Turn ON all electrical disconnect devices.

3.If unit has a crankcase heater, energize the heater and wait 24 hours before proceeding.

4.Set indoor thermostat at desired temperature. Be sure setpoint is below indoor ambient temperature to call for cooling, or above indoor ambient to call for heating.

5.Set indoor thermostat selector switch to COOL or HEAT. Operate unit for minimum 15 minutes, then check the system refrigerant charge.

Check For Proper Phasing

Observe the LED on the Phase Monitor Relay Board. If the LED is blinking, turn off power to the unit and swap any two of the supply voltage wires. Turn power back on and repeat the start-up procedure.

REFRIGERANT CHARGE

A. COOLING MODE

Outdoor units are shipped with a refrigerant charge to match a specific indoor coil and 15 feet of refrigerant line. If shorter or longer refrigerant lines or a different indoor coil are used, the charge will have to be adjusted.

For different line lengths, add or remove charge based on

0.6ounces charge per foot of difference. For example, a 25 foot line set is 10 feet longer than the specified 15 feet. Add 0.6 ounces charge for each of the extra 10 feet:

10 x 0.6 = 6.0 ounces additional charge

This outdoor unit is designed for use only with indoor coils that utilize a TXV refrigerant metering device. With an indoor TXV, use the subcooling method to make final charge adjustments:

NOTE: Only use subcooling charging method when

S outdoor ambient temperature is between 70_F and 100_F S indoor temperature is between 70_ and 80_F

S line set is less that 80 feet.

1.Operate unit a minimum of 15 minutes before checking charge.

NOTE: If outdoor unit has a 2-speed fan motor,

motor will operate in low speed when outdoor ambient temperature is below 82 °F. Pull one of the yellow low voltage wires off the fan control and the unit will default to high speed fan for servicing. Reconnect wire after servicing.

2.Measure liquid service valve pressure by attaching an accurate gauge to service port.

3.Measure liquid line temperature by attaching an accurate thermistor type sensor or electronic thermometer to liquid line near outdoor coil.

4.Refer to unit rating plate for required subcooling temperature.

5.Refer to Figure 14. Find the required liquid line temperature where the rating plate subcooling temperature intersects measured liquid service valve pressure.

6.If the measured liquid line temperature is higher than the chart number, add refrigerant to lower the measured temperature.

NOTE: When adding refrigerant, charge in liquid form, using a flow restricting device, into the suction port.

If the measured liquid line temperature is lower than the chart number, reclaim refrigerant to raise

the measured temperature. Tolerance is 3 °F.

B.HEATING MODE

To check system operation during heating cycle, refer to the Tech Label on outdoor unit. This chart indicates whether a correct relationship exists between system operating pressure and air temperature entering indoor and outdoor units. If pressure and temperature do not match on chart, system refrigerant charge may not be correct. Do not use chart to adjust refrigerant charge.

NOTE: When charging is necessary during heating season, charge must be weighed in accordance with unit rating plate ±0.6 ounces per foot of a inch liquid line above or below 15 feet respectively.

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HP H4H3 manual START-UP Procedure, Refrigerant Charge, Check For Proper Phasing, Cooling Mode, Heating Mode
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