Description
Grandaire 10 kW Electric Heater Kit: CPHEATER129A03
The CPHEATER129A03 is a 10 kW electric heater for Grandaire WJA5 packaged air conditioners (WJA524000K000B through WJA560000K000B). It mounts inside the packaged unit's supply air section and turns a cooling-only package into a cooling and electric heating system.
Heater output depends on supply voltage. The kit is rated 10 kW at 240V and delivers about 7.5 kW (25,590 BTU/h) on a 208V supply.
Specifications
- Rated output: 10 kW at 240V / 7.5 kW at 208V
- Heating capacity: 34,120 BTU/h at 240V
- Power supply: 208/240V, 1-phase, 60 Hz
- Staging: Two stages
- Circuit protection: No circuit breaker (unit wiring provides protection)
- Fits: Grandaire WJA5 packaged air conditioners (WJA524000K000B through WJA560000K000B)
Sizing and installation
Pick the heater from a heat-loss calculation for the home, and check the air handler's minimum airflow for that heater size before installing. The heater changes the unit's minimum circuit ampacity and maximum breaker, so the branch circuit and wire gauge must be sized for the combined load. Installation should be done by a licensed electrician or HVAC contractor.
Common questions
Will this fit an air handler from another brand?
No. It is built for the specific Grandaire cabinet listed above, including its plug-in harness and mounting.
How much heat do I need?
As a rough guide, heat pump homes in Florida and the Gulf states often use 5 to 10 kW, while colder climates need more. A Manual J load calculation gives the right answer for your house.
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