Chappee NXR3 Installation Manual
1 Ref. : CH - 1249 - A - 2
1 . Standards - Regulations
2 . General
3 . Assembly and installation
4 . Installing the options
5 . Commissioning
6 . Maintenance
HIGH-EFFICIENCY, PRESSURIZED,
CAST IRON, OIL OR GAS BOILERS
70 / 290 kW
Ref. : CH - 1249 - A - 2 - EN 07/01
INSTALLATION MANUAL
NXR3
2Ref. : CH - 1249 - A - 2
1. STANDARD - REGULATIONS
BAXI does not accept any liability for damage caused by
work that does not comply with these instructions and/
or which has not been carried out by a qualified
installer.
This boiler design complies with the following European
directives:
Directive Mains voltage 73 / 23 / CEE
Directive Electromagnetic 89 / 336 / CEE
compatibility
Directive Efficiency 92 / 42 / CEE
This boiler complies with the following standards:
EN 303.1 • Boilers with forced air burner: Terminology,
general specifications, tests and marking
EN 303.2 • Boilers with forced air burner: Special
specifications for boilers with sprayed oil
burner
EN 304 • Test regulations for boilers with sprayed oil
burner
DIN 4791 • Boiler and burner connections
The boiler can be fitted with a choice of fuel oil or gas burner
in accordance with the builder’s recommendations, the burner
complying with the following standards:
EN 267 • One piece sprayed oil burner
EN 676 • Automatic blown air burner for gas fuels
EN 226 • Burner to heat generator connection sizes
The heating system installation must comply with current
regulations.
In particular:
DTU 65 • Central heating systems in buildings
DTU 65.4 • Gas and liquid hydrocarbon boilers
DTU 65.11 • Safety systems for central heating systems
in buildings
Installers’ Association agreement of 2 July 1969.
BAXI S.A. attests that all boilers referred to in this
manual comply the same requirements as corresponding
examined types, for which the right to use CE marking
has been granted according to "Gas appliance" and
"Boiler efficiency" European directives.
3 Ref. : CH - 1249 - A - 2
2. GENERAL
2 . 1 Description
Boilers of this type are composed of a cast-iron
exchanger, consisting in sections assembled by means of
nipples. Their heat transfer surfaces have been specially
designed to reach high efficiency. The exchanger is insulated
by a glass wool layer lined by lacquered steel casing panel,
itself insulated to reduce heat losses to a minimum.
These pressurized boilers must be fitted with jet-oil or blowngas burners, provided operating characteristics are compatible with the combustion chamber size and pressure conditions.
They heat premises, and, for Domestic Hot Water (D.H.W.)
production, can be coupled with a D.H.W. tank located next
to it.
2 . 2 Standard supplies
• Fire chamber cast-iron sections not assembled,
• Accessories: smoke box, optimizing baffles, flue ways
hinged door, opening chamber door with burner plate,
welding flanges for tubes Ø 76,
• Insulated casing and cleaning brush,
• Depending on the order, this boiler is fitted with a control
panel (according to version).
2 . 3 Supplied on request
• Heating body delivered assembled,
• Two extra power economizers,
• Starter sleeve with finger button for remote control sensor
and ¾” ∅ tapped opening with plug (not assembled),
• Return sleeve with finger button for remote control sensor
and ¾” ∅ drainage valve (not assembled),
• Adjustable feet for levelling body,
• Control panel options,
• OIL or GAS burner, depending on matching prescriptions,
• Domestic Hot Water calorifer (250-350-500-800)
2 . 4 Shipping, Packaging
Packaging is as follows :
Boiler
assembled
X
X
X
X
X
Boiler
not assembled
X
X
X
X
X
X
X
Package
Heating exchanger not assembled
Heating exchanger assembled
Optimizing baffles
Heating exchanger accessories
Control panel wired
Casing
Extra accessories
Tie-rods
34
7
612
5
612
35
7
730
5
730
36
7
849
5
848
37
7
963
5
950
38
7
1082
5
1068
39
7
1198
5
1184
exchanger not
assembled
Nb of parcels
Total weight kg
exchanger
assembled
Nb of parcels
Total weight kg
4Ref. : CH - 1249 - A - 2
2 . 5 Technical data
Flow DN 65
Fig. 1
Return DN 65
Drain Rp 1 1/2" orifice
Rp 2" orifice for
sludge flushing
36
130-170
6
1335
1240
1090
292
935
180
170
270
160
6
15
30-90
110
0,11
0,40
140-185
0,5-0,8
201-265
232-306
161-180
92,7 - 93 6
139 - 183
0,5 - 1,0
199 - 262
229 - 303
147 - 166
93,4 - 94,2
39
250-290
9
1845
1750
1600
292
1445
200
260
390
232
6
50
30-90
110
0,07
0,25
271-317
1,5-2,3
388-454
448-524
170-188
92,4 - 93,2
270 - 315
1,7 - 2,5
385 - 451
445 - 520
156 - 174
93,0 - 93,8
37
170-210
7
1505
1410
1260
292
1105
180
200
320
184
6
21
30-90
110
0,09
0,33
184-229
0,7-1,2
263-328
303-378
164-182
92,6 - 93,4
182 - 227
0,8 - 1,3
261 - 325
301 - 375
150 - 168
93,2 - 94,1
38
210-250
8
1675
1580
1430
292
1275
200
230
350
208
6
31
30-90
110
0,08
0,28
228-273
1,3-1,8
325-391
375-451
167-185
92,5 - 93,3
226 - 271
1,5 - 2,0
323 - 388
372 - 447
153 - 171
93,1 - 93,9
35
90-130
5
1165
1070
920
292
765
180
140
230
136
6
9
30-90
110
0,13
0,52
97-142
0,2-0,5
139-202
160-234
158-177
92,8 - 93,7
96 - 140
0,2 - 0,5
137 - 200
158 - 231
144 - 163
93,5 - 94,4
Réf. chaudière : N°
Output : kW
Number sections
Dimensions : Cote A : mm
Cote B : mm
Cote C : mm
Cote Y : mm
Combust. chamber depth P : mm
Smoke hood Ø D : mm
Chamber volume : l
Flue path volume incl-chamber : l
Water system vulume : l
Working pressure : bar
Waterside pressure loss at (∆t = 15 K ) : mbar
Thermostat range adjustement : °C
Limit stat max setting. (temperature) : °C
Standing losses (NFD 30 002) : %
Heating maintenance needs : %
Flame output (P nom) : kW
Chamber pressure : mbar
Massic-flow oil flues : Kg/h
Massic-flow gas flues : Kg/h
Flue gas temperature : °C
Combustion efficiency (2) : %
Flame output (P nom) : kW
Chamber pressure : mbar
Massic-flow oil flues : Kg/h
Massic-flow gas flues : Kg/h
Flue gas temperature : °C
Combustion efficiency (2) : %
34
70 - 90
4
995
900
750
292
595
180
110
190
112
6
5
30 - 90
110
0,14
0,74
75 - 98
0,1 - 0,2
108 - 140
124 - 161
155 - 174
93,0 - 93,9
74 - 97
0,1 - 0,3
106 - 138
123 - 160
141 - 160
93,6 - 94,5
* Dimensions with water
connection sleeve
(1) The maintenance coefficient is for an average boiler temperature of 70 °C .
(2) Values given for rated output, 20 °C room temperature, boiler temperature 80 °C, return 60 °C.
(3) CO2 (indicative) - 13 % (oil) - 10 % (gas)
2 Savers(3)
4 Savers (3)
N04153.DSF
5 Ref. : CH - 1249 - A - 2
3. ASSEMBLY AND INSTALLATION
Connections to water supply
Connection to the heating system needs to be done according
to statutory regulations and trade practice.
Fuel supply
For oil and gas, comply with statutory rules and
recommendations, in particular with respect to safety rules.
Power supply
comply with regulatory prescriptions, in particular with respect to earthing and its connection to the boiler (main
switch...)
Flue stack
A 0 daPa depression should be observed at exit of smoke box.
Comply with statutory regulations and trade practice.
Please note that the efficiency of these boilers results in
relatively low flue gas temperatures.
Special care must be given to flue stack which must be airtight, heat-insulated and protected against degradation. One
of the actions to take is to line the duct. Tubing grade must
be compatible with the selected fuel.
It is advised :
• to keep the same cross-section as that of the boiler smoke
hood outlet,
• to avoid short radius,
• to keep the number of bends to a minimum
• where possible, to slope connecting parts upwards,
towards chimney
• to provide a purging vessel as close to the boiler as
possible.
Water flow rate
The system must be designed to ensure a water flow rate, in
each boiler, comprised between 1/3 and 3 times the QN
nominal flow rate.
QN =
Water flow rate allowed in each boiler must be comprised
between :
3 . 1 Boiler room layout
Plinth (see fig. 2)
No special plinth is required for this type of boiler. A simple dry
base suffices. For information, we provide the dimensions of
this dry base (figure 2). For certain special installations, a
sound-proof plinth may be necessary. We recommend a
metal plinth resting on reachable antivibration pads.
Fig. 3
Clearance (see fig.3)
The dimensions shown are minimal values which allow proper
access for assembly and maintenance operations.
No need to leave clearance above for cleaning purposes.
Boiler
size C L
34 750 900
35 920 1070
36 1090 1240
37 1260 1410
38 1430 1580
39 1600 1750
Flat bars
width 150
Optional
sealing
Fig. 2
Caution : assembly and installation must be carried out by a qualified engineer.
PN kW x 0,86
15K
PN kW x 0,86
5K
PN kW x 0,86
45K
and
N0225100.PLT
N0218601.PLT
Choice of burner
The burner should be chosen according to the boiler power
and furnace.
Ventilation
Comply with statutory regulations for low and high ventilation
6Ref. : CH - 1249 - A - 2
Boiler Number of sections
ref. Front Middle Rear
34 1 2 1 None
35 1 3 1 None
36 1 4 1 Short
37 1 5 1 Short
38 1 6 1 Long
39 1 7 1 Long
Distributors
Cord
S
S
E
Fig. 5
Sludge flush
Non return valve
Fig. 4
DIAGRAM OF THE ELEMENTS
S : tightening markings
E : spacing pads
S
Front Middle Rear
Assembly marking
Cord junction point
SSS
Minimum flow rate must be provided at all times,
whatever the rate of operation, either :
- by means of the main flow pump, provided that the
system has no mixing valve between each boiler and
the pump, and that the pump operates continuously,
- by means of a recycling pump or a loading pump
operating permanently.
In the case of a recycling pump or a loading pump per
boiler, and to avoid parasitic flows in the other boilers,
position non return valves upstream from the return
connection.
The burner must be controlled by the recycling or
loading pump. It can only be put in operation if the pump
operates. Secondarily, a flow control device, combined
with the TH thermostat, can be mounted on the return
of the boiler, downstream from the recycling or loading
pump.
To vents
00306N0225200.PLT
N0226701.PLT
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