ICC ETH-1000, Installation Manual

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BACnet / Gas Water Heaters
Table 12. Xi 1.0 Energy Management System (EMS) Control
Decimal Hex Value Response
3840 0x0F00 No EMS control
[
3841 0x0F01 Put into EMS Mode^
[&
0000 0x0000 EMS Disable heating^
[&
0001 0x0001 EMS Enable heating^
[&
3584 0x0E00
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EMS mode ends.) 15 seconds or less recommended
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or not heating is enabled.
Notes:
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After disabling EMS mode with write of 3840, read back might have bits 14 and 1 possibly still set. To make sure these bits are clear, write a 0000 to clear bit 1 and 3584 to
clear bit 14.
Mxi Energy Management System (EMS) Control
Mxi EMS control is written as a single command to place in EMS mode and enable or disable heating.
Once in EMS mode the EMS Mode Refresh command must be periodically issued to maintain EMS mode, otherwise the heater will end
EMS mode and resume normal operation.
Table 13. Mxi Energy Management System (EMS) Control
Decimal Hex Value Response
0 0x0000 No EMS control~
[
32768 0x8000 EMS Disable Heating^
[&
32769 0x8001 EMS Enable Heating^*
[&
Notes:
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a 0 to it. Power cycling only can clear EMS mode.
A 'HSHQGLQJRQZKHQ\RXSROOWKHUHJLVWHU\RXPD\UHDGELWDVZKLFKLVZK\D³&´LQKH[DGHFLPDOIRUPPLJKWEULHÀ\UHSO\ZLWK³´7KLVLVGXHWRWKHFRQWUROVHWWLQJ
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* EMS command to heat must be sent every 30 maximum or heating will be disabled.