EHK Installation Manual

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Specifications are subject to change without notice
Figure 1
Installing The Electric Heat Accessory
Installation of 18kW, 24kW, and 30kW Model Heaters
Table 1 − Accessory Heater Usage
Part Number Description
Use with Model Sizes
EHK05AKN 5 kW, single phase, no internal circuit protection ALL
EHK05AKB 5 kW, single phase, with circuit breakers ALL
EHK07AKN 8 kW, single phase, no internal circuit protection ALL
EHK07AKB 8 kW, single phase, with circuit breakers ALL
EHK09AKCN
9 kW, supplied as single phase, field convertible to
3-phase, no internal circuit protection
3600, 4800, 6000
EHK10AKN 10 kW, single phase, no internal circuit protection ALL
EHK10AKB 10 kW, single phase, with circuit breakers ALL
EHK15AKF 15 kW, single phase, with fuses ALL
EHK15AKB* 15 kW, single phase, with circuit breakers ALL†
EHK15AHN 15 kW, 3-phase, no internal circuit protection ALL†
EHK18AHN 18 kW, 3-phase, no internal circuit protection 4800, 6000
EHK20AKF 20 kW, single phase, with fuses ALL†
EHK20AKB* 20 kW, single phase, with circuit breakers ALL†
EHK25AHCF
24 kW, supplied as 3-phase, field convertible to
single phase, with fuses
4800, 6000
EHK30AHCF
30 kW, supplied as 3-phase, field convertible to
single phase, with fuses
4800, 6000
* EHK15AKB & EHK20AKB are not approved for use in Canada (must use fused heaters and certified single point wiring kit).
† 15kW & 20kW are not recommended for specific heat pump applications, see AIRFLOW DELIVERY (CFM)
Minimum CFM when using Electric Heat (motor speed Low except as noted)
EBP, EBX, EBXX, EBW
FEM, FSM, FSU
Model Size
Heater kW
5 8 9 10 15 18 20 24 30
1800 525* 525* −
600K
− − − − −
2400 700‡ 700‡ − 700‡ 775‡ − − − −
3000 875 875 − 875 875 − 1060* − −
3500 & 3600 1050 970 970 970 920 − 1040 − −
4200 − 1225 1225 1225 1225 1225 1225 − −
4800 − 1400 1400 1400 1400 1400 1400 1400 1400
6000 − 1750 1750 1750 1750 1750 1750 1750 1750
K Indicates High speed (Black wire) for 2−speed motor.
* Indicates Medium speed (Blue wire) for 3−speed motor or High speed (Black wire) for 2−speed motor
‡ Indicates Medium speed (Blue wire) for 3−speed motor or Low speed (Red wire) for 2−speed motor
STATIC PRESSURE CORRECTION FOR ELECTRIC HEATERS (EBP, EBW, EBX, EBXX, EBV, FEM, FSM, FSU, FVM)
Due to higher static pressure drop with additional electric heater elements in some application, an adjustment table to the static
pressure is provided in the Installation and Operations Manual or the Product Specifications.