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10HP Series LennoxHeat Pump Unit
Lennox 10HP Diplomat Series Heat Pump
Name of Series: Diplomat
Service Manual: Click Here
Parts List: Click Here
The Lennox 10HP Diplomat was a high-efficiency residential split system
heat pump unit in its time. It was available in
1.5, 2, 2.5, 3, 3.5, 4,
and 5 ton capacities.
Considered a high SEER unit in its day, the 10HP Series could achieve
approximately 10 SEER. The minimum SEER allowed for installation today
due to energy consumption is 13 SEER. Models are available up to 21
All 10HP sizes are equipped with crank case heaters which ensure the
refrigerant and oil in the compressor stay seperate during cool periods
of no operation.
10HP series units through 4 Tons can be matched with a thermal
expansion valce or an RFCIVIII device on the indoor coil.
DO NOT USE AN AIR
CONDITIONER COVER ON THIS UNIT AS IT IS DESIGNED TO RUN ALL
The main components(repair parts) for all 10HP Series units
- Main Contactor: Energizes the compressor and fan on
a call for cooling
- Dual Capacitor: Creates a phase shift to start and
run both the compressor and contactor
- Fan Motor and Blade: Circulates air through the
condensing coils removing and expelling heat collected
- Reciprocating compressor: Circulates the refrigerant
through the system changing the refrigerants state to facilitate heat
- Reversing Valve: enables the unit to operate in a
reverse cooling cycle. This is the component that makes the unit a heat
- Timer and Defrost
Control: Ensures the unit
cycled or started and stopped before pressure equalization occurs and
sets unit into defrost when required by either time or temperature.
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