Heat Pump Water Heater
15
Electrical Heat Only Mode
This operational sequence is the same as the sequence for the Energy Saver and Normal Modes
except:
1.Compressor operation is not allowed.
2.Evaporator fan is de-energized and remains de-
energized.
3.Start sequence is not employed.
4.Water pump is set to low flow rate and remains in this
position. Water pump is energized whenever heat is
required to maintain the lower tank thermostat settings.
5.Electric heating element is cycled as required by the
Normal/High/Vacation mode temperature settings.
6.This operating mode is maintained for a maximum of
2 weeks or 336 hours. After this time period, the water
heater is returned to NORMAL operation.
Here is how the heating element electrical system works:
1. Always 240V between ECO 1 & 3 (even in heat pump modes)
2. Always 240V between ECO 2 & 4 (if ECO is not tripped)
3. Always 120V at blue wire to each element
4. Orange wire from ECO goes back to RELAYS at wire nut
5. Control board energizes respective Upper or Lower relay
6. Relay moves 120V power back thru red wire (upper element)
7. Or brown wire (lower element)
8. Now have 240V between element wires
9. Heating element operates at 2000 watts
Figure 4 – Heating Element Electrical System
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