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Vendor Information – Navien
Appendix C.2 NFB-C Main 1 Sub 1 - Sub 31 Modbus RTU Mappings to LonWorks
Point Name
LonWorks Name
LonWorks SNVT
SH operation on/off control
nviSH_OpOnOC_XXX
SNVT_switch
Outdoor reset curve usage enable
nviOtRsCrUsE_XXX
SNVT_switch
WWSD enable
nviWWSD_Enbl_XXX
SNVT_switch
DHW operation ON/OFF control
nviDHWOpOnOC_XXX
SNVT_switch
Cascade system enable state
nviCsSysEnSt_XXX
SNVT_switch
Cascade burning state
nvoCsBrnSt_XXX
SNVT_switch
Cascade SH operation state
nvoCsSH_OpSt_XXX
SNVT_switch
Main Burner op state
nvoMnBrnOpSt_XXX
SNVT_switch
Main Frozen protection mode
nvoMnFrzPrMd_XXX
SNVT_switch
Main Error state
nvoMnErrSt_XXX
SNVT_switch
Main Boiler enable status
nvoMnBlEnSta_XXX
SNVT_switch
Main Boiler pump op Status
nvoMnBlPmOpS_XXX
SNVT_switch
Sub01 Burner op state
nvo01BrnOpSt_XXX
SNVT_switch
Sub01 Frozen protection mode
nvo01FrzPrMd_XXX
SNVT_switch
Sub01 Error state
nvo01ErrSt_XXX
SNVT_switch
Sub01 Boiler enable status
nvo01BlEnSta_XXX
SNVT_switch
Sub01 Boiler pump op Status
nvo01BlPmOpS_XXX
SNVT_switch
Sub02 Burner op state
nvo02BrnOpSt_XXX
SNVT_switch
Sub02 Frozen protection mode
nvo02FrzPrMd_XXX
SNVT_switch
Sub02 Error state
nvo02ErrSt_XXX
SNVT_switch
Sub02 Boiler enable status
nvo02BlEnSta_XXX
SNVT_switch
Sub02 Boiler pump op Status
nvo02BlPmOpS_XXX
SNVT_switch
Sub03 Burner op state
nvo03BrnOpSt_XXX
SNVT_switch
Sub03 Frozen protection mode
nvo03FrzPrMd_XXX
SNVT_switch
Sub03 Error state
nvo03ErrSt_XXX
SNVT_switch
Sub03 Boiler enable status
nvo03BlEnSta_XXX
SNVT_switch
Sub03 Boiler pump op Status
nvo03BlPmOpS_XXX
SNVT_switch
Sub04 Burner op state
nvo04BrnOpSt_XXX
SNVT_switch
Sub04 Frozen protection mode
nvo04FrzPrMd_XXX
SNVT_switch
Sub04 Error state
nvo04ErrSt_XXX
SNVT_switch
Sub04 Boiler enable status
nvo04BlEnSta_XXX
SNVT_switch
Sub04 Boiler pump op Status
nvo04BlPmOpS_XXX
SNVT_switch
Sub05 Burner op state
nvo05BrnOpSt_XXX
SNVT_switch
Sub05 Frozen protection mode
nvo05FrzPrMd_XXX
SNVT_switch
