8
RIVA PLUS COMBI MANUAL
1. General Information
2. Technical Information (M135.30CM)
The Riva Plus Combi is a high ef
fi
ciency condensing, wall mounted gas boiler which provides
central heat. The boiler features a gas valve which modulates the energy input from 49,476
BTU/h to 116,008 BTU/h. The boiler is shipped fully assembled with the components listed on
page 11. All units are pressure and combustion tested at the factory prior to shipping.
Key Features:
• Wall mountable - saving valuable
fl
oor
space.
• Several
fl
ue options available
• Electronic spark ignition
• Safety
fl
ow switch - positioned on the
main circuit, which monitors the
fl
ow and
protects the main heat exchanger from
thermal shock should there be a lack of
water in the system.
• Frost protection - contains an integral frost
protection system to prevent frost dam-
age which can occur in areas susceptible
to very cold weather conditions.
• Boiler operation recognition system -
should the boiler not be used for longer
than 24 hours, it then performs a con-
trolled system test to ensuring the motor-
ized components within the boiler do not
become inoperable due to lack of use.
• Gas valve modulation - the gas input
modulates based off central heating tem-
perature to within ± 2 ºF
• Diagnostic information system equipped
with three LED diagnostic lights for quick
error assessment.
GENERAL
Height
in
31.6
Width
in
15.7
Depth
in
13.8
Weight
lb
109.5
ELECTRICAL
Voltage
V
120
Frequency
Hz
60
Current
A
1.6
Power consumption
W
180
INJECTORS No. Size
Natural
14
130
Propane
14
89
CENTRAL HEATING
Maximum working temp.
°F
185
Temp. Regulation range*
°F
100-176
Maximum pressure
psi
30.0
Minimum pressure
psi
4.35
Max head loss (at 4.4 GPM)
ft
8.25
*At the minimum useful output