Biasi RIVA COMBI User manual

BOILER SERVICE INSTRUCTIONS
MANUAL
COMBI
WALL HUNG GAS BOILER FOR
CENTRAL HEATING AND DOMESTIC
HOT WATER SUPPLY
Please Read Instructions Carefully
Save for Future Reference
— Do not store or use gasoline or other flammable vapors and liquids
in the vicinity of this or any other appliance.
— WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electric switch; do not use any phone in your
building.
• Immediately call your gas supplier from a neighbor’s phone.
Follow the gas supplier’s instructions.
• If you can not reach your gas supplier call the fire department.
— Installation and service must be performed by a qualified installer,
service agency or the gas supplier.
WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result causing
property damage, personal injury or loss of life.
Manufactured by:
Biasi S.p.A.
Verona, Italy
Distributed By:
Quincy Hydronic Technologies, Inc.
80 Rochester AVE. Suite # 12
Portsmouth, NH 03801
Phone: [phone]
Fax: [phone]
RIVA COMBI SERVICE MANUAL - REV A
*17562.0183.0*
17562.0183.0 0406
(
57A4
)
US
A

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First Part Service Manual
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RIVA COMBI SERVICE MANUAL – REV A 2

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First Part Service Manual
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RIVA COMBI SERVICE MANUAL – REV A 3
1 The Technical Manual
The aim of this manual is to provide technical
assistance operators with all the information
necessary to facilitate maintenance of Biasi.
products.
To use this manual in the best possible way
and to find the information in it quickly it is
necessary to understand how it is laid out by
reading the following carefully:
2 Manual layout
The manual is divided into three different parts
(fig. 1).
The first part contains the general instructions
on how to use and consult the manual; the
nomenclature of the models illustrated in this
manual and the grouping criteria for each
family.
The second part contains booklets with
technical data, hydraulic and wiring diagrams,
troubleshooting instructions and start-up
checks, grouped into product families.
The third part contains the technical data
sheets relative to each component, its basic
characteristics, checking its condition and
replacing and/or servicing.
fig. 1
Parts two and three are preceded by an index
that gives the contents and their order of
arrangement.
3 Topic, numbering, edition
The topic dealt with on each card is also shown
in the top outer corner of each page, the part in
the inner top corner. The pages are numbered
in the bottom corner (fig. 2).
Technical sheet edition date (month and year)
is given between part and argument on top of
the page.
fig. 2
Part one is laid out with consecutive numbers
(fig. 3).
135
fig. 3
Part two is arranged on two levels (fig. 4). The
first gives the acronym of the family to which
the technical sheet belongs; the number that
follows indicates technical sheet order
sequence inside each family.
M35.30CB - 7
M35.30CB - 5
M35.30CB - 3
M35.30CB - 1
first level second level
fig. 4
Part three is also arranged on two levels (fig.
5); the first is a number assigned to each
component, the second indicates technical

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First Part Service Manual
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RIVA COMBI SERVICE MANUAL – REV A 4
sheet order sequence. Correspondence
between component and number is given in the
index at the beginning of part three.
1-1 1-3 2-1 2-3
fig. 5
4 Updating
The evolution of Biasi products entails updating
the technical assistance personnel and relative
documentation.
The updated documentation which will be sent
to the Assistance Service Centres, whether in
the shape of a circular or technical sheets to be
added to the manual or to replace others, must
be properly inserted.
All technical service personnel must be
informed immediately of their contents.
5 Models
All models of products manufactured are
identified with a name. This name (from here
referred to as model) is determined by the
unitÕs construction characteristics (fig. 6)
M35.30CB
Max useful power in c.h.
30 = 30,00 kW (25 800 kcal/h)
C = Sealed Chamber
Boiler series
B = With Storage Tank
fig. 6
The information contained in this manual is
applicable to the following models:
M35.30CB
6 Serial number
Each unit has its own serial number, the
meaning of which is given in fig. 7).
N210250205
Progressive number
Gas Type
N = Natural
G = L.P.G.
Construction month and year
fig. 7
7 Series
The boilers are grouped into families in part two
of this manual, each group including models
with identical construction features and, hence,
with identical maintenance.
Within each family the models differ only in their
nominal thermal capacity or other
characteristics that do not call for different
maintenance.
Series Models
M35------------------|M35.30CB

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Second Part M35.30CB Maintenance Characteristic Verification
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RIVA COMBI SERVICE MANUAL – REV A
Summary
Page
OVERALL VIEW………………………………………………………….…M35.30CB - 1
HYDRAULIC DIAGRAM……………………………………………………M35.30CB - 1
ELECTRICAL DIAGRAM………………………………………………..…M35.30CB - 2
GAS ADJUSTMENT DATA………………………………………………..M35.30CB - 3
FAULT FINDING………………………………………………………….…M35.30CB - 4-5
CIRCUIT VOLTAGES………………………………………………………M35.30CB - 6
OPERATION LIGHTS………………………………………………………M35.30CB - 7
START UP CHECKS………………………………………………………..M35.30CB - 7
GAS CONVERSION…………………………………………………...……M35.30CB - 8

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Second Part M35.30CB Maintenance Characteristic Verification
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RIVA COMBI SERVICE MANUAL – REV A

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Second Part M35.30CB Maintenance Characteristic Verification
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RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 1
1 Overall View
Pump
Pump vent plug
Burner
Flame-detec
ting electrode
Combustion
chamber
Primary heat
exchanger
Ignition
electrodes
Fan
Gas valve inlet
pressure test point
Modulation
operator
Air pressu
re switch
Gas valve outlet
pressure test point
C.h. expan
sion vessel
Main circuit air
breathe valve
C.h. temp.
probe NTC
C.h.
PRV
Safety
thermostat
Control
panel
D.h.w.
PRV
D.h.w. sto
rage tank
Primary circuit
flow switch
Three way
diverter valve
Modulation
gas valve
D.h.w. expan
sion vessel
Automatic air
purger valve
Air pressure
switch test points
Gas
Main circuit
drain cock
C.h.
return
C.h.
flow D.h.w
. inlet
D.h.w.
outlet D.h.w
. PRV C.h.
PRV
D.h.w. tempera
ture probe NTC Storage tank
drain cock
Magnesium
anode
fig. 1
2 Hydraulic Diagram
C.h. water return
C.h. water flow
D.c.w.inle
t
D.h.w.outlet
fig. 2

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Second Part M35.30CB Maintenance Characteristic Verification
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RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 2
3 Electrical Diagram
ye bk wh gy bu rd
bk gy
gy
gy
M
~
M
~
tt
probe NTC
D.h.w. Temperature
Probe NTC C.h. temperature
COM
NO
M
~
COM
NO
NC
123 bk
bubn
rd
rd
gnyegywh
bu
rd
bk
bu
wh
gybugnye
bk bk
rd bk wh gygnye bu
bk
bk
bubu
bu
bu
rdbk
gygy
bubn
bn
bu
L N
rd bu bn gnye gnye
gnye bubn
burd
gnye
rd
wh
bk
Flow Switch
Primary Circuit
diverter valve
Three way Pump
Valve
Gas
External Controls
Terminal
Block
Electric Supply
Terminal
Block
Fan Safety
Thermostat
Air Pressure
Switch
Ignition
Electrodes
Flame Detection
Electrode
bn - brown
bu - blue
bk - black
wh - white
rd - red
gy - grey
ye - yellow
vt - violet
og - orange
gnye - green/yellow
1
3
2
wh
gy
rd
rd
bk
bu
bn
gy
ye wh burd
1
bk
rd
*
* ---> directly connected to the electronic ignition board
fig. 3

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Second Part M35.30CB Maintenance Characteristic Verification
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RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 3
4 Gas Adjustment Data
Maximum gas pressure at the injectors
Natural (G20)
Propane (G31)
inwc
inwc
5.3
9.0
Minimum gas pressure at the injectors
Natural (G20)
Propane (G31)
inwc
inwc
0.8
1.4
Ignition pressure
Natural (G20)
Propane (G31)
inwc
inwc
2.4
5.2
Maximum gas rate
Natural (G20)
Propane (G31)
ft³/h
lb/h
121.1
5.55
Minimum gas rate
Natural (G20)
Propane (G31)
ft³/h
lb/h
48.7
2.23
Injectors
Natural (G20)
Propane (G31)
n°/Ф14/130
14/89
Useful output KW
Kcal/h
10.8
9288
12.0
10320
14.0
12040
17.0
14620
20.0
17200
23.0
19780
26.0
22360
29.5
25370
Pa
inwc
220
0.88
250
1.00
330
1.32
470
1.89
640
2.57
830
3.33
1050
4.22
1330
5.34
Natural
m³/h 48.7 53.0 60.7 72.4 84.0 96.0 107.7 121.1
Pa
inwc
360
1.45
420
1.69
560
2.25
800
3.21
1080
4.34
1400
5.62
1760
7.06
2230
8.95
Propane
lb/h 2.2 2.4 2.8 3.3 3.9 4.4 4.9 5.5

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Second Part M35.30CB Maintenance Characteristic Verification
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RIVA COMBI SERVICE MANUAL – REV A M35.30CB - 4
5 Fault Finding