Installation manual

RIVA PLUS COMBI MANUAL 9
2. Technical Information Cont.
ENERGY CAPACITY
Nominal heat input
(0/2000 ft)
MBH 116.0
Nominal heat input
(2000/4500 ft)
MBH 110.2
Minimum heat input MBH 49.5
Maximum useful output
(0/2000 ft)
MBH 102.0
Maximum useful output
(2000/4500 ft)
MBH 97.2
Minimum useful output MBH 41.6
GAS SUPPLY PRESSURE
Gas Normal Min Max
Natural inwc 7.0 3.5 10.5
Propane inwc 11.0 8.0 13.0
GAS PRESSURE AT BURNER
Gas Min Max Ignition
Natural inwc 1.0 4.8 2.4
Propane inwc 2.0 10.3 5.2
FLUE DESIGN
Minimum Venturi pressure inwc 0.64
Flue pipe diameter
Coaxial in
2.25/4
3.25/5
Twin split pipes in 3.25/3.25
Nominal heat ow rate
(0/2000 ft)
MBH 116.0
Nominal heat ow rate
(2000/4500 ft)
MBH 110.2
Min Exhaust temperature °F 140
Max Exhaust temperature °F 190
GAS FLOW RATE
Gas Min Max
Natural ft³/h 48.7 115.1
Propane lb/h 2.2 5.2
CLEARANCE TO COMBUSTIBLES
Front in 18
Back in 0
Top in 10
Sides in 2
Bottom in 8
Flue pipe enclosed in 2
Flue pipe free air in 0
Hot water pipes in 1”
FLUE GAS FIGURES
Gas Min Max
CO2 2.5% 6.3%
O2 16.5% 9.7%
DOMESTIC HOT WATER
Maximum temperature °F 131
Minimum temperature °F 95
Maximum pressure psi 145
Minimum pressure psi 4.35
D.h.w. ΔT 25K gpm 4.5
D.h.w. ΔT 30 K gpm 3.8
D.h.w. ΔT 35 K gpm 3.2
D.h.w. ΔT 40 K gpm 2.8