Ambirad NRV12LR, Installation Instructions Manual, Page: 24 / 28

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Table 5. Heater Details
12LR 18LR 24LR 32LR 38LR 46LR
Min distance between burners m 5.2 7.4 9.4 14 18 23
Max distance between burners m 7.2 10.2 13.1 18 23 27
Min distance between burner and
fitting
m 3.6 3.6 5.0 6.0 7.0 8.0
Max tube temp °C 450 480
Min mounting height m 3.0 3.6 4.0 4.7 5.3 6.0
Max burners per branch 5 4 3 3 3 3
Burner Type
Table 7. End Vent Module (EVM)
12LR 18LR 24LR 32LR 38LR 46LR
End vent setting (hot)
- Multi burner systems
mbar 6.25 6.25 6.25 6.25 6.25 6.25
End vent setting (hot)
- SINGLE End Vent burners only
mbar n/a n/a n/a 7.5 8.25 9.25
End vent setting (hot)
- THREE burners in a branch
mbar n/a n/a n/a n/a n/a 5.6
End Vent orifice diameter mm 14.5 16 24 27 32 n/a
End Vent orifice Part No. L104102 L104101 L104100 L104093 L104092 n/a
Burner Type
Table 6. Heater Noise Data
12LR 18LR 24LR 32LR 38LR 46LR
Noise level @ 3m below
In-Line BURNER
db(A) tba tba 37 tba tba tba
NR±2 tba tba 33 tba tba tba
Noise level @ 3m below
EVM Burner
db(A) tba tba tba tba tba tba
NR±2 tba tba tba tba tba tba
Noise level @ 3m below
EVM with silencer
db(A) tba tba tba 36 tba tba
NR±2 tba tba tba 33 tba tba
Noise level @ 3m below
EVM Burner with Ducted Air
db(A) tba tba tba 37 tba tba
NR±2 tba tba tba 34 tba tba
Burner Type
Table 8. System Weights
Burner Type 12LR 18LR 24LR 32LR 38LR 46LR
LR Burner kg 8.3
Radiant branch* kg/m 8.3
Radiant Slimline grille* kg/m 10.9
Radiant Protective guard* kg/m 10.0
4” Mild steel tail pipe kg/m 5.5
4” Aluminum tail pipe kg/m 0.9
6” Mild steel tail pipe kg/m 10.6
6” Aluminium tail pipe kg/m 1.3
Max / susp point @ EV position kg 24.2
* without burners or ducted air systems