ANSTY CONDENSING BOILERS
Welded Stainless Steel Boilers
Installation, Commissioning
and Operating Instructions
Models: 75kW to 640kW
NATURAL GAS I2H
IMPORTANT NOTE
THESE INSTRUCTIONS MUST BE READ
AND UNDERSTOOD BEFORE INSTALLING,
COMMISSIONING, OPERATING OR
SERVICING EQUIPMENT
Customer After Sales Services
Telephone: 01202 662555 E-mail: service@hamworthy-heating.com Fax: 01202 662522
Technical Enquiries
To supplement the detailed technical brochures, technical advice on the application and use of products in the Hamworthy
Heating range is available from our technical team in Poole and our accredited agents.
Site Assembly
Hamworthy offer a service of site assembly for many of our products where plant room access is restricted. Using our trained staff
we offer a higher quality of build and assurance of a boiler built and tested by the manufacturer.
Commissioning
Commissioning of equipment by our own engineers, accredited agents or specialist sub-contractors will ensure the equipment is
operating safely and efciently.
Service Contracts
Regular routine servicing of equipment by Hamworthy service engineers inspects the safety and integrity of the plant, reducing the
risk of failure and improving performance and efciency. Service contracts enable you to plan and budget more efciently.
Breakdown service, repair, replacement
Hamworthy provide a rapid response breakdown, repair or replacement service through head ofce at Poole and accredited
agents throughout the UK.
Spare Parts
We offer a comprehensive range of spare parts, providing replacement parts for both current and discontinued products. Delivery
options are available to suit you. Please refer to our website for more details.
Ansty Condensing Boilers
Welded Stainless Steel Boilers
75kW to 640kW
Installation, Commissioning
and Servicing Instructions
I
NATURAL GAS
2H
NOTE: THESE INSTRUCTIONS SHOULD BE READ AND UNDERSTOOD BEFORE
ATTEMPTING TO INSTALL, COMMISSION OR OPERATE THIS UNIT
THE ANSTY CONDENSING BOILER IS INTENDED FOR USE AS A COMMERCIAL
APPLIANCE
THE GASED FIRED VARIANTS OF THIS BOILER ARE FOR USE ON GROUP H NATURAL
GAS (2ND FAMILY) I2H. PLEASE ENSURE RELEVANT INFORMATION REQUIRED WITHIN
DOCUMENT IS FOUND RELATING TO SPECIFIC FUEL TO BE FIRED BEFORE FIRING
BOILER.
THIS BOILER COMPLIES WITH ALL RELEVANT EUROPEAN DIRECTIVES.
EC TYPE CERTIFICATE No. E0831/5374
PRODUCT IDENTIFICATION No. 0461BO0703
PUBLICATION NO. 500001119
ISSUE ‘D’
JANUARY 2012
HAMWORTHY HEATING LTD
i
ANSTY
500001119/D
CONTENTS
PAGE
1.0 INTRODUCTION ................................................................................................................................ 1
2.0 DELIVERY .......................................................................................................................................... 1
3.0 DIMENSIONS AND CLEARANCES .................................................................................................. 2
4.0 LOCATION ......................................................................................................................................... 6
5.0 GAS SUPPLY .................................................................................................................................... 6
5.1 Service Pipes
5.2 Meters
5.3 Gas Supply Pipes
5.4 Boosted Supplies
5.5 Boiler House Control Valve
6.0 FLUE SYSTEM ................................................................................................................................... 6
6.1 Flue System General Requirements
6.2 Design Waste Gas Volume and Temperature
6.3 Materials
6.4 Suction
6.5 Disconnection
6.6 Flue Discharge
6.7 Surface Temperatures
6.8 Flue System Location
6.9 Condensate Discharge
7.0 AIR SUPPLY ...................................................................................................................................... 7
7.1 Air Supply By Natural Ventilation
7.2 Air Supply By Mechanical Ventilation
8.0 WATER CIRCULATION S YSTEM ..................................................................................................... 8
8.1 General
8.2 Pressure Relief Valve (Safety Valve)
8.3 Open Vent and Cold Feed Pipe
8.4 Altitude Gauge (Water Pressure Gauge)
8.5 Thermometer
8.6 Drain Valves
8.7 Circulating Pump
8.8 Minimum Water Flow Rates
8.9 Control Schemes
8.10 Unvented Systems
8.11 Modular Boiler Control Schemes
9.0 ELECTRICAL SUPPLY ..................................................................................................................... 9
9.1 Site Wiring
9.2 Indication Signals and Volt Free Contacts
HAMWORTHY HEATING LTD
ii
ANSTY
500001119/D
PAGE
10.0 BOILER ASSEMBLY AND INSTALLATION ................................................................................... 11
10.1 Dual Boiler Assembly Instructions
10.2 Casing Assembly
10.2.1 Fitting Boiler Insulation
10.2.2 Assembly of Boiler Staves Casing
10.2.3 Positions of Ansty Dual Thermostat Bulbs
10.3 Pipework Kit Assembly (Ansty Dual only)
10.4 Control Panel
10.5 Control, Ansty Dual
10.6 Burner Connection
11.0 COMMISSIONING AND TESTING .................................................................................................. 23
11.1 Electrical Installation
11.2 Gas Installation
11.3 Water Circulation System
11.4 Commissioning the Boiler
11.5 External Controls
11.6 Installation Noise
11.7 User Instructions
12.0 FAULT FINDING .............................................................................................................................. 25
13.0 SERVICING ...................................................................................................................................... 25
14.0 REPLACEMENT OF FAILED COMPONENTS ................................................................................ 25
APPENDIX ‘A’ – GENERAL REQUIREMENTS / BRITISH STANDARDS ......................................................... 27
APPENDIX ‘B’ – OPTIONAL EXTRAS ................................................................................................................ 29
HAMWORTHY HEATING LTD
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PICTORIAL AND DIAGRAMATICAL DATA
FIGURES PAGE
Figure 2.1 Exploded View of Ansty Condensing Boiler ................................................................................. 1
Figure 3.1 Ansty Single System - Dimensional Overview ......................................................................... 2
Figure 3.2 Ansty Dual System - Dimensional Overview ................................................................................ 3
Figure 3.3 Technical Data - Ansty Single ..................................................................................................... 4
Figure 3.4 Technical Data - Ansty Dual ........................................................................................................ 5
Figure 7.1 Mechanical Ventilation Flow Rates .............................................................................................. 8
Figure 8.3 Cold Feed and Vent Pipe Sizes .................................................................................................. 8
Figure 9.2 Volt Free Contact Kit Wiring Details ........................................................................................... 10
Figure 10.1.4 Removal of Bracing Brackets (Ansty Dual only) ......................................................................... 11
Figure 10.1.8 Alignment of Upper and Lower Boiler Sections (Ansty Dual only) ................................................ 11
Figure 10.1.9 Fitting the Rear Junction Plate (Ansty Dual Models AD540 & AD640 only) .................................. 12
Figure 10.1.10 Pictorial View of Ansty Dual Boilers Assembled ........................................................................ 12
Figure 10.2.1 Insulation Jacket in Flat Pattern ............................................................................................. 13
Figure 10.2.2 Assembly of the staves casing .................................................................................................. 13
Figure 10.2.3 Inserting the staves ................................................................................................................ 14
Figure 10.2.4 Installing the closing frame ..................................................................................................... 14
Figure 10.2.5 Control panel installation ........................................................................................................ 15
Figure 10.2.6 Inserting the staves ................................................................................................................ 16
Figure 10.2.7 Ansty Dual Thermostat Bulb Positions ....................................................................................... 16
Figure 10.3 Pipework Kit (Ansty Dual only) .................................................................................................. 17
Figure 10.3.1 Fitting Cold Return Header ....................................................................................................... 18
Figure 10.3.2 Fitting Flow Header .................................................................................................................. 18
Figure 10.3.3 Fitting Warm Return Header ..................................................................................................... 18
Figure 10.4.1 Control Panel Overview ............................................................................................................ 19
Figure 10.4.2 Wiring Diagram ........................................................................................................................ 20
Figure 10.6.1 Burner Fitting Details ................................................................................................................ 21
Figure 10.6.2 Matched Burner Combinations .................................................................................................. 22
Figure 14.1 Replacement Parts / Recommended Spares ............................................................................. 26
Figure A1.3 Scale Deposition Chart ............................................................................................................. 28
Figure B1.1 System Options ........................................................................................................................ 29
Figure B1.2 Target Appliance Readings .................................................................................................... 30
HAMWORTHY HEATING LTD
iv
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1.0 INTRODUCTION
1.1 The Ansty stainless steel condensing boiler
range consists of 7 gas fired models with outputs
ranging from 75kW to 320kW. The boilers can also
be stacked as ‘Dual’ versions, with 7 models giving
outputs ranging from 150kW to 640kW. Refer to
section 3.0 for dimensional details.
Ansty condensing boilers can be used individually,
or in a multi-boiler configuration, and are suitable for
use on either open-vented or sealed low
temperature hot water heating systems with a
maximum working pressure up to 5 bar (73psi). For
hot water production they can be used in
conjunction with calorifiers or indirect hot water
cylinders. Refer to section 8.0 for system details.
Ansty condensing boilers are suitable for connection
to a normal temperature, low temperature or a
condensing system.
For optimum efficiency performance, the Ansty
condensing boiler should be used in systems with a
return temperature below 55°C. Above this
temperature, condensate from the flue gases will not
form and the boiler will operate as a ‘High Efficiency’
boiler.
Ansty condensing boilers are assembled with a
slight incline of the heat exchanger, assisting with
the disposal of condensate from the flue collector
box at the rear of the boiler. The front and rear
support plates are removable to accommodate
access through small openings.
Chesil pressurisation units are available from
Hamworthy Heating Ltd for sealed systems.
The Ansty condensing boiler can be fitted with either
a high/low or modulating burner for operation on
Natural Gas I
(Second Family). Refer to section
2H
10.6 for performance and burner details.
The boiler is supplied with a pre-wired control panel
which contains:
a. A fuse
b. An illuminated mains on/off switch
c. Boiler thermostats - Hi/Lo
d. Boiler run lamp
e. A temperature limiter (overheat thermostat) to
shut down the boiler should the water
temperature in the heat exchanger exceed
110
o
C - with manual reset.
f. Hours run meters for Hi & Lo operation.
g. A water temperature thermometer
(temperature gauge)
h. A flying lead and plug to connect to the burner
j. Volt free relays for normal run, overheat
and lockout .
2.0 DELIVERY
2.1 The Ansty condensing boiler is delivered in
four/ five packages:
a. Boiler body - incl. Burner mounting plate and
documentation.
b. Casing assembly and Insulation
c. Control panel assembly
d. Burner
e. Dual assembly kit (where applicable)
See Figure 2.1 Below
Figure 2.1
c. Control Panel Assembly
b. Casing Assembly
HAMWORTHY HEATING LTD
1
ANSTY
e. Insulation
d. Matched Burner
b. Casing Assembly
a. Boiler body
500001119/D
3.0 BOILER DIMENSIONS AND CLEARANCES
Figure 3.1 Ansty Single Boiler Models
Y* X W Z* **Y**170
N6
N9
b
ANSTY
Model
Casing Width A mm 746 746 746 846 846 976 976
Frame Width A1 mm 680 680 680 780 780 920 920
Overall Length B mm 1155 1155 1155 1155 1435 1455 1455
Body Length B1 mm 785 785 785 785 1040 1040 1040
Boiler Length B2 mm 1093 1093 1093 1119 1398 1436 1436
Condense Drain C mm 174 174 174 174 174 77 77
Burner D mm 529 530 530 580 580 550 550
Return F mm 125 126 126 126 126 133 133
Boiler Drain G mm 125 126 126 126 126 59 59
Boiler Height H mm 1015 1015 1015 1115 1115 1115 1115
Flow M mm 900 900 900 1000 1000 1035 1035
Return R mm 881 881 881 980 980 922 922
Flue T mm 503 503 503 553 553 524 524
Flue Connection ØiC mm 151 151 151 181 181 201 201
Draught Tube Opening Øb mm 130 130 130 145 145 180 180
Flow/Return/
Connection - PN6
Boiler Drain N4 in 3/4" 3/4" 3/4" 3/4" 3/4" 1/2“ 1/2“
Condense Drain N5 in 3/4" 3/4" 3/4" 3/4" 3/4" 1" 1"
Sensor Pockets N6/N7 in 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2"
Air Vent Tapping N9 in - - - - - - CLEARANCES
Burner Depth W mm 238 238 262 262 580 580 580
Front Access X mm 455 455 455 455 455 455 455
Side Access Y* mm 350 350 350 350 350 350 350
Rear Access Z*** mm 500 500 500 500 500 500 500
Side Clearance Y** mm 300 300 300 300 300 300 300
N1/N2/
N3
A75 A90 A120 A160 A220 A270 A320
DN 50 50 50 50 50 65 65
N7
C
G
B1
B2
B
N4
N3
N5
17 0
200200
N2 N 4
A1
A
N
*Y Dimension
It is recommended this clearance is
maintained at least on 1 side for rear
access to pipe connections and flue.
Where two boilers are used the
minimum space between boilers is
60mm to facilitate fitting the casing.
**Y Dimension
Where using side mounted control
panels this is the minimum
recommended clearance to facilitate
access to thermostats and switches.
***Z Dimension
This dimension is a minimum
recommendation permitting access
to rear of boiler for maintenance. It
may not however be adequate for
the flue installation.
Where necessary the dimension
must be increased accordingly.
NOTE!
When installing more than 2 boilers it is recommended that only 2 are close spaced with side access
provided between the 2nd and 3rd boilers.
HAMWORTHY HEATING LTD
2
ANSTY
500001119/D
Figure 3.2 Ansty Dual Boiler Models
Y* Y**170 X W Z***
18 3
18 3
N6 (n¼2)
N9
N6 ( n¼2)
N9
N7
B1
B2
B
N7 N8 N7 N6
N5
N4
N4
N5
N4
200 200
N1
N5
N3
L
E
E
N4
N2
N5
A2
A1
A
ANSTY DUAL
Model AD150 AD180 AD240 AD320 AD440 AD540 AD640
Casing Width A mm 746 746 746 846 846 976 976
Frame Width A1 mm 680 680 680 780 780 920 920
Overall Length B mm 1642 1642 1642 1647 1982 1996 1996
Body Length B1 mm 785 785 785 785 1040 1040 1040
Boiler Length B2 mm 1188 1188 1188 1192 1463 1484 1484
Condense Drain C mm 174 174 174 174 174 77 77
Condense Drain C1 mm 1163 1163 1163 1263 1274 1166 1166
Burner D mm 530 530 530 580 580 550 550
Burner D1 mm 1520 1520 1520 1670 1670 1640 1640
E mm 173 173 173 173 201 201 201
Return F mm 126 126 126 126 126 133 133
Boiler Drain G mm 126 126 126 126 126 59 59
Boiler Drain G1 mm - - - - - 1165 1165
Boiler Height H mm 2004 2004 2004 2204 2204 2204 2204
Manifold to Centre L mm 388 388 388 388 388 606 606
Flow M mm 1889 1889 1889 2089 2089 2125 2125
Return R mm 881 881 881 980 980 922 922
Flue T mm 503 503 503 553 553 524 524
Flue T1 mm 1492 1492 1492 1642 1644 1614 1614
Flue Connection ØiC mm 151 151 151 181 181 201 201
Draught Tube Opening Øb mm 130 130 130 145 145 180 180
Flow/Return/
Connection - PN6
Boiler Drain N4 in 3/4" 3/4" 3/4" 3/4" 3/4" 1/2“ 1/2“
Condense Drain N5 in 3/4" 3/4" 3/4" 3/4" 3/4" 1" 1"
Sensor Pockets N6/N7 in 1/2" 1/2" 1/2" 1/2" 1/2" 1/2" 1/2"
Gauge Tapping N8 in 1" 1" 1" 1" 1" 1" 1"
Air Vent Tapping N9 in - - - - - - -
CLEARANCES
Burner Depth W mm 238 238 262 262 580 580 580
Front Access X mm 455 455 455 455 455 455 455
Side Access Y* mm 350 350 350 350 350 350 350
Rear Access Z*** mm 1000 1000 1000 1000 1000 1000 1000
Side Clearance Y** mm 300 300 300 300 300 300 300
N1/N2/
DN 50 50 50 50 80 80 80
N3
*Y Dimension
It is recommended this
clearance is maintained at
least on 1 side for rear
access to pipe connections
and flue.
Where two boilers are used
the minimum space between
boilers is 60mm to facilitate
fitting the casing.
**Y Dimension
Where using side mounted
control panels this is the
minimum recommended
clearance to facilitate access
to thermostats and switches.
***Z Dimension
This dimension is a minimum
recommendation permitting
access to rear of boiler for
maintenance. It may not
however be adequate for the
flue installation.
Where necessary the
dimension must be
increased accordingly.
NOTE!
When installing more than 2 boilers it is recommended that only 2 are close spaced with side access
provided between the 2nd and 3rd boilers.
HAMWORTHY HEATING LTD
3
ANSTY
500001119/D
Figure 3.3 - Technical Data - Ansty Single
Boiler Model A75 A90 A120 A160 A220 A270 A320
Heat output to water - Gross
Non condensing 80/60ºC
E
Heat output to water—Gross
N
Condensing 50/30ºC
E
R
Heat input (net) - Gross
G
Y
Heat input (net) - Net
Water Content
Design Flow Rate
@ 11ºC Δt
Waterside pressure drop
@ 11ºC Δt
W
Design Flow Rate
A
@ 20ºC Δt
T
Waterside pressure drop
E
@ 20ºC Δt
R
Minimum flow rate
Maximum water pressure
kW
Btu/hr x 1000
kW
Btu/hr x 1000
kW
Btu/hr x 1000
kW
Btu/hr x 1000
litres
UK gal
l/min
UK gal/min
mbar
in wg
l/min
UK gal/min
mbar
in wg
l/min
UK gal/min
bar
psig 5 72.5 5 72.5 5 72.5
67.7
231
75
255.9
78.5
267.8
69.8
238.2
97
21
98
22.5
0.8
0.3
54
11.9
0.25
0.1
27
5.9
81.2
277
90
307.1
94.3
321.7
83.7
285.6
97
21
117
25.7
1
0.4
64
14.1
0.3
0.1
32
7.0
108.2
369.2
120
409.4
126.3
430.9
112.2
382.8
97
21
156
34.3
1.2
0.5
86
18.9
0.36
0.1
43
9.5
144.3
492.3
160
545.9
168.3
574.2
149.5
510.1
112
25
208
45.8
1.3
0.5
115
25.3
0.39
0.2
57
12.5
5
72.5
198.5
677.3
220
750.6
230.4
786.1
204.7
698.4
149
33
287
63.1
1.5
0.6
158
34.8
0.45
0.2
79
17.4
5
72.5
243.6
831.2
270
921.2
282.7
964.6
251.2
856.8
230
51
352
77.4
1.6
0.6
194
42.7
0.48
0.2
97
21.3
5
72.5
280.1
989.8
320
1091.8
336.7
1148.8
299.1
1020.5
230
51
417
91.7
1.8
0.7
229
50.4
0.54
0.2
115
25.3
5
72.5
Maximum water flow
temperature
Combustion resistance
Input rate
Natural Gas (G20)
G
Nominal inlet pressure required
A
Natural gas - inlet to gas train
S
Approx. flue gas volume
At NTP natural gas
Approx. flue gas temp - nat. gas
@ 30º return temp.
F
Flue connection O/D
L
U
Flue draught requirements Balanced Condition at Boiler Outlet
E
Electrical supply—boiler /
burner
E
L
Start Current Amps 2.6 2.6 4.5 4.5 4.8 4.8 4.8
E
C
Run Current Amps 0.7 0.7 1.4 1.4 1.3 1.3 1.3
ºC 100 100 100 100 100 100 100
mbar
in wg
m³/h
ft³/h
mbar
in wg
m³/h
ft³/h
mm
ºC
ºF
in
0.7
1.75
7.38
260.61
20
8
98
3461
45
113
151
5.95
0.9
2.25
8.86
312.9
20
8
118
4167
45
113
151
5.95
1.5
3.75
11.87
419.2
20
8
158
5580
45
113
151
5.95
230V 1PH 50Hz
2.5
6.25
15.82
558.7
20
8
210
7416
45
113
181
7.13
2.8
7
21.66
764.9
20
8
288
10170
45
113
181
7.13
3
7.5
26.58
938.7
20
8
352
12431
45
113
201
7.91
3.8
9.5
31.65
1117.7
20
8
420
14832
45
113
201
7.91
HAMWORTHY HEATING LTD
4
ANSTY
500001119/D
Figure 3.4 - Technical Data - Ansty Dual
Boiler Model AD150 AD180 AD240 AD320 AD440 AD540 AD640
Heat output to water - Gross
Non condensing 80/60ºC
E
Heat output to water—Gross
N
Condensing 50/30ºC
E
R
Heat input (net) - Gross
G
Y
Heat input (net) - Net
Water Content
Design Flow Rate
@ 11ºC Δt
Waterside pressure drop
@ 11ºC Δt
W
Design Flow Rate
A
@ 20ºC Δt
T
Waterside pressure drop
E
@ 20ºC Δt
R
Minimum flow rate
Maximum water pressure
kW
Btu/hr x 1000
kW
Btu/hr x 1000
kW
Btu/hr x 1000
kW
Btu/hr x 1000
litres
UK gal
l/min
UK gal/min
mbar
in wg
l/min
UK gal/min
mbar
in wg
l/min
UK gal/min
bar
psig 5 72.5 5 72.5 5 72.5
136.0
464
150
511.8
157.8
538.4
140.2
478.4
194
43
196
43.1
1.6
0.64
108
23.8
0.5
0.2
54
5.9
163.2
556.8
180
614.2
189.4
646.2
168.2
573.9
194
43
234
51.5
2
0.8
128
28.2
0.6
0.24
64
7.0
218.5
745.5
240
818.9
254.9
869.7
226.4
772.5
194
43
312
68.6
2.4
0.96
172
37.8
0.72
0.29
86
9.5
294.1
1003.5
320
1091.8
343.1
1070.7
304.8
1040
224
49
416
91.5
2.6
1.04
230
50.6
0.78
0.31
114
12.5
5
72.5
398.9
1361
440
1501.3
462.9
1579.4
411.2
1403
298
66
574
126.3
3
1.2
316
69.5
0.9
0.36
158
17.4
5
72.5
489.5
1670.2
540
1842.5
568.1
1938.1
504.7
1722
460
101
704
154.9
3.2
2.66
388
85.4
0.98
0.39
194
21.3
5
72.5
580.2
1979.6
640
2183.7
673.3
2297.3
598.1
2040.7
460
101
834
183.5
3.6
1.44
458
100.7
1.08
0.43
230
25.3
5
72.5
Maximum water flow
temperature
Combustion resistance
Input rate
Natural Gas (G20)
G
Nominal inlet pressure required
A
Natural gas - inlet to gas train
S
Approx. flue gas volume
At NTP natural gas
Approx. flue gas temp - nat. gas
@ 30º return temp.
Flue connection O/D
F
2 Connections
L
U
Flue draught requirements Balanced Condition at Boiler Outlet
E
Electrical supply—boiler /
burner
E
L
Start Current Amps 2.6 2.6 4.5 4.5 4.8 4.8 4.8
E
C
Run Current Amps 0.7 0.7 1.4 1.4 1.3 1.3 1.3
ºC 100 100 100 100 100 100 100
mbar
in wg
m³/h
ft³/h
mbar
in wg
m³/h
ft³/h
mm
ºC
ºF
in
0.7
1.75
14.83
253.7
20
8
196
6922
45
113
151
11.9
0.9
2.25
17.8
628.6
20
8
236
8334
45
113
151
11.9
1.5
3.75
23.96
846.1
20
8
316
11160
45
113
151
11.9
230V 1PH 50Hz
2.5
6.25
32.25
1138.9
20
8
420
14832
45
113
181
14.26
2.8
7
43.51
1536.6
20
8
576
20340
45
113
181
14.26
3
7.5
53.4
1885.8
20
8
704
24862
45
113
201
15.82
3.8
9.5
63.29
2235.1
20
8
840
29664
45
113
201
15.82
HAMWORTHY HEATING LTD
5
ANSTY
500001119/D
4.0 LOCATION
4.1 The boiler location must permit the provision of
a satisfactory flue system, and provide adequate
space around the boiler for servicing and air
circulation.
Sufficient space must be provided at the front of the
boiler to allow the removal of the burner assembly
for servicing/replacement, and at the rear for
installation of pipes, valves and flue.
Sufficient clearance around the boiler must also be
provided to allow access for servicing. Refer to
Figures 3.1 and 3.2 for recommended clearances.
The boiler room, or compartment, housing the boiler
(s) - whether specifically constructed for the
purpose, or a modification of an existing space should be in accordance with the requirements of
either BS.6644, or BS.5410 Part 2, as appropriate.
Where a separate purpose built boiler room is not
available, measures should be taken to protect the
boiler or boilers from damage, and the boiler should
be sited such that extraneous material cannot be
stored next to, or against it.
The Ansty condensing boiler is of all welded circular
construction containing a series of fire tubes
between the combustion chamber and outer shell
and therefore requires installing on a suitable level
non-combustible surface, capable of withstanding
temperatures of 65
°
C and able to support the weight
of the boiler (including pipework and ancillary
equipment) when filled with water.
The compartment housing the boiler must have
permanent air vents communicating directly with the
outside air at both high and low level. Refer to
Section 7.0 for details.
5.0 GAS SUPPLY
5.1 Gas Service Pipes
The local gas region should be consulted at the
installation planning stage to either determine the
feasibility of providing a gas supply or, where there
is an existing supply, to ensure that the meter
capacity is adequate for the rated input of the
proposed new boiler. An existing gas service pipe
must not be used without prior consultation with the
local gas region.
5.2 Gas Meters
A new gas meter will be connected to the service pipe
by the local gas region, or a local gas region contractor.
An existing meter should be checked, preferably by the
gas region, to ensure that it is adequate to deal with the
rate of gas supply required.
5.3 Gas Supply Pipes
Supply pipes must be fitted in accordance with BS 6891
or IGE/UP/2. Pipework from the meter to the boiler must
be of adequate size. Do not use pipes of a smaller size
than the boiler gas connection. The complete installation
must be purged and tested for soundness as described
in BS 6891 or IGE/UP/1 and IGE/UP/1A as
appropriate.
A manual shut off valve must be fitted on the incoming
gas supply pipe, adjacent to each boiler, in an easily
accessible position.
5.4 Boosted Gas Supplies
Where it is necessary to employ a gas pressure
booster, the controls must include a low pressure cut-off
switch at the booster inlet. The local gas region must be
consulted before a gas pressure booster is fitted.
5.5 Boiler House Gas Control Valve
A manual valve for boiler house isolation shall be fitted
in the gas supply line. It shall be clearly identified and
readily accessible for operation, preferably by an exit.
6.0 FLUE SYSTEM
6.1 General Requirements
Detailed recommendations for flue systems are given in
BS 6644, IGE/UP/10, "Flues for Commercial and
Industrial Gas-Fired Boilers and Air Heaters."
The following notes are intended to give general
guidance only.
The flue passages within the Ansty boiler operate
under pressurised conditions and in order to
eliminate any additional resistance, it is
recommended that the flue system shall be adapted
to its design diameter as soon as possible, after
leaving the boiler.
The boiler should be connected to a single flue
system in the case of a single boiler, or a common
flue header in the case of a multiple boiler
installation. Flue systems must be self supporting,
contain access for cleaning and contain a
maintenance joint near the boiler outlet to allow for
removal of the flue box during servicing.
Ansty boilers are suitable for installation in a
balanced compartment in accordance with the
requirements of BS 6644. Consult Hamworthy
Heating Technical Department for help or
assistance if in doubt.
6.2 Design Waste Gas Volume and Temperature
It is recommended that the volume and temperature
of the waste gases used for design of the flue
system are as shown in Figures 3.3 and 3.4.
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6.3 Materials
Materials used for the flue system must be mechanically
robust, resistant to internal and external corrosion, noncombustible and durable under the conditions to which
they are likely to be subjected.
Consideration should be given to possible freezing of
condense water traps and pipework. This must be
avoided at all times. Insulate condense pipes if freezing
temperatures are likely to be encountered.
Chimneys should be lined with a non-porous acidresistant material in accordance with BS.5854, e.g.
a flexible flue liner or similar British Gas Approved
material. The internal diameter of the liner must not
be less than the recommended flue size and the
number of joints should be kept to a minimum.
Any joint between the flexible liner and the flue pipe
from the boiler should be made using a purpose
made connector. Existing chimneys should be
thoroughly swept before use and any register plates,
dampers, or restrictions removed.
If the boiler(s) is not connected to a chimney
system, but is connected directly to outside by a
standard stainless steel flue (either single or twin
wall) it is particularly important to ensure that the
point at which it exits the building is fully
weatherproofed.
6.4 Suction
The flue system should be designed to maintain
atmospheric pressure or a slight suction at the boiler
flue connection at all times (0.1 - 0.3mbar).
It is recommended that a draught stabiliser is fitted to
the flue system where the suction is likely to exceed
0.3mbar.
6.5 Disconnection
Provisions should be made for disconnection of the flue
pipe for servicing. It is advisable that bends are fitted
with removable covers for inspection and cleaning as
appropriate. NOTE! The flue system must be self
supporting and not present a risk to people in or around
the building. See Section 13.0: SERVICING for further
information.
6.6 Flue Discharge
The flue system must ensure safe and efficient
operation of the boiler to which it is attached, protect the
combustion process from wind effects and disperse the
products of combustion to the external air.
The flue must terminate in a freely exposed position and
be situated so as to prevent the products of combustion
entering any opening in a building. Consideration should
be given to the fitting of a flue discharge terminal or grille
to stop the ingress of birds etc.
The flue system should be designed such that the
flue terminates at least 1 metre above the roof
surface, or above the level of any nearby structure
which is within 2.5 metres of the flue.
6.7 Surface Temperatures
Combustible materials in the vicinity of the boiler and
flue shall not exceed 65 °C during boiler operation. The
flue shall not be closer than 50mm to any combustible
material, except where it passes through such material
with a non-combustible sleeve when the air gap may
not be less than 25mm.
6.8 Flue System Location
The flue system must not be placed or fitted where
there is undue risk of accidental damage to the flue pipe
or undue danger to persons in the vicinity. NOTE! The
flue MUST be self supporting. Check that the flue and
chimney are clear from any obstruction.
6.9 Condensate Discharge
When designing the flue system, care must be taken
to ensure that any condensate which may form
within the system can be safely drained to a suitable
waste point and that the flue material used is
resistant to the corrosive effects of that condensate.
7.0 AIR SUPPLY
Detailed recommendations for air supply are given in
BS 6644. The following notes are intended to give
general guidance. In all cases there must be provision
for an adequate supply of air for both combustion and
general ventilation, in addition to that required for any
other appliance.
7.1 Air Supply By Natural Ventilation
The boiler room must have, or be provided with,
permanent air vents directly to the outside air, at high
level and at low level. For an exposed boiler house, air
vents should be fitted preferably on all four sides, but at
least on two sides. Air vents should have negligible
resistance and must not be sited in any position where
they are likely to be easily blocked or flooded or in any
position adjacent to an extraction system which is
carrying flammable vapour. Grilles or louvres must be
so designed that high velocity air streams do not occur
within the space housing the boiler.
The air supplied for boiler house ventilation shall be
such that the maximum temperatures within the boiler
house shall be as follows:
1) At floor level (or 100mm above floor level)
= 25 °C.
2) At mid-level (1.5m above floor level)
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= 32 °C.
3) At ceiling level (or 100mm below ceiling level)
= 40 °C.
Where both low and high level openings are used, the
grilles shall have a total minimum free area of :Low Level (inlet) 540cm
of 60 kW total rated input (gross).
High Level (outlet) 270cm
2
plus 4.5cm2 per kW in excess
2
plus 2.25cm2 per kW in
excess of 60kW total rated input (gross).
7.2 Air Supply By Mechanical Ventilation
Air supplied to the boiler room by mechanical means
should be as follows :-
1) Mechanical inlet and mechanical extract can be
utilized providing design extraction rates comply with
Figure 7.1
2) Mechanical extract ventilation with natural inlet
ventilation MUST NOT be used.
NOTE: For mechanical ventilation systems an
automatic control should be provided to cut off the gas
supply to the boiler, in the event of failure of air flow in
either inlet or extract fan
Flow Rate per 1000 kW
total rated heat input (gross)
Forced Draught
Boilers
Inlet air
(Combustion
Ventilation)
Extract air
(Ventilation)
m3/s m3/s
Volume 0.9 0.6
Figure 7.1 Mechanical Ventilation Flow Rates
8.0 WATER CIRCULATION SYSTEM
8.1 General
Recommendations for the water circulation system are
given in BS 6644 and CP 342. The following notes are
of particular importance:-
1) In a combined central heating and hot water system,
the hot water storage vessel must be of the indirect
cylinder or calorifier type. The hot water storage vessel
should be insulated preferably with not less than 75mm
(3 in) thick mineral fibre, or its thermal equivalent.
2) Circulating pipework not forming part of the useful
heating surface should be insulated to help prevent heat
loss and possible freezing, particularly where pipes are
run through roof spaces and ventilated cavities.
Cisterns situated in areas, which may be exposed to
freezing conditions, should also be insulated. Insulation
exposed to the weather should be rendered waterproof.
3) Drain valves must be located in accessible positions
which permit the draining of the whole system, including
the boiler and hot water storage vessel.
4) Each boiler has a flanged flow and return connection
located on the rear section of the boiler. A75 - A220,
50mm NB, A270 - A320 65mm NB. Mating flanges are
supplied suitable for welding to pipe.
5) Multiple boilers should be connected by flow and
return headers. Headers should be connected to the
system in a "reverse return" arrangement (the water
flow in each header is in the same direction) to ensure
equal flow in each module.
8.2 Pressure Relief Valve (Safety Valve)
The most important single safety device fitted to a boiler
is its safety valve and each boiler, or in the case of a
modular installation, each bank of boilers, must be fitted
with a pressure relief valve to BS 759 or BS 6759 Part 1
(ISO 4126) and sized as shown in BS 6644.
BS 6644 provides comprehensive information for the
selection and location of safety valves and attention is
drawn to the higher capacity requirements of safety
valves for pressurised hot water systems.
8.3 Open Vent and Cold Feed Pipe
(See BS 6644 for further information.)
Every boiler or group of boilers should have an open
vent pipe and cold feed pipe installed between the boiler
and the first water isolating valve. The minimum bore
(mm) of these pipes per installation are detailed in
Figure 8.3
The vent pipe must rise continually, must not be valved
except by a design which when closed for maintenance
the boiler is open to atmosphere. The pipe shall be
protected against freezing where this might occur.
8.4 Altitude Gauge (Water Pressure Gauge)
Every boiler or group of boilers should be provided
with a gauge complete with isolating valve. See
Figure B1.1 in Appendix B for typical position.
Boiler Output Feed Vent
60kW - 150kW 25 32
150kW – 300kW 32 38
300kW – 600kW 38 50
Figure 8.3 Cold Feed and Vent Pipe Sizes (mm)
8.5 Thermometer
See Figure B1.1 in Appendix B for typical position.
A thermometer complete with pocket should be fitted in
the pipework to indicate water flow temperature.
8.6 Drain Valves
Each boiler should have ¾” NB drain valve fitted (not
HHL supply), to drain the boiler only. A plugged Rc ¾”
connection is provided for a drain valve at the bottom
rear section. The heating system in total should have
drain valves as recommended by BS 6644. See Figure
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B1.1, Appendix B for recommended positions.
8.7 Circulating Pump
One or more circulating pumps will be required to
circulate water around the boilers and heating system.
The pump should be sited to facilitate servicing. It is also
important that the existing system be flushed through
twice to remove any loose matter, which may have
accumulated. If in any doubt regarding the cleanliness
of the system, a coarse filter should be fitted in the
return pipework to the boilers.
NOTE: If boilers are run off time clock control, a pump
overrun (not HHL supply) should be fitted which must
run for a minimum of 5 minutes on shut-down of the last
boiler.
8.8 Minimum Water Flow Rates
Minimum water flow rates are shown in Figure 3.3 &
3.4. These flow rates should be maintained through
the boiler at all times whilst the boiler is firing. If the
water flow rate is allowed to fall below the minimum,
the boiler heat exchanger could fail due to the
resultant scale formation. Particular attention should
be paid to the restriction of external flow circuits
during periods of low heat demand.
8.9 Control Schemes
8.9.1 Temperature Controls
An adjustable control thermostat is supplied with each
boiler and should be set to operate within the range 3090°C for standard applications. A temperature limiter,
(hand reset limit thermostat) is also fitted to the boiler
and must be set at 110°C.
NOTE! The minimum difference between control
thermostat and temperature limiter must never be less
than 10°C.
Where the system is operating on a ΔT of 20°C, care
should be taken to ensure that the return temperature
does not fall below 50°C.
8.9.2 Water Flow Controls
Any external mixing valve/shunt pump or similar
controls should ALWAYS ENSURE that the minimum
water flow rate as shown in Figures 3.3 and 3.4 is
maintained.
8.9.3 Frost Protection
Consideration should be given to fitting a frost
thermostat set at approximately 4°C.
8.10 Unvented Systems
See Figure B1.1 in Appendix B for typical layout of a
Unvented (Pressurised) Hot Water System. For system
design refer to BS 7074 Part 2.
In order to correctly size a pressurisation unit for any
heating system certain parameters are required. These
are:-
1) Static height of highest component in system
(metres).
2) System volume - if it is not known a general rule of
thumb of 10 litres/kW of installed boiler power can be
used.
3) Maximum flow temperature (°C).
4) Maximum system hot working pressure, generally
given in bar g.
From the above information Hamworthy Heating can
size the pressurization unit and also the expansion
vessel required. Care must be taken in sizing expansion
vessels to ensure maximum acceptance factors are not
exceeded. Normally manufacturers of vessels impose
a limit of 0.5. This value must not be exceeded at any
time during the operation of the boiler: this includes the
over pressure condition should a safety valve lift.
Consideration should also be given to sizing of the
safety valve(s) in the system. See BS 6759: Part 1, for
information. See also BS 6880: Part 1 for design
considerations.
8.11 Modular Boiler Control Schemes
For modular boiler installations, Hamworthy Heating can
supply a unique boiler management control system
called the ‘Marshall HE’. This system comprises: a wall
mounted master control unit, which houses the main
interface processor and will control up to 8 stages. See
Figure B1.1 in Appendix B. For further information,
contact Hamworthy Heating for details.
9.0 ELECTRICAL SUPPLY
WARNING: THIS APPLIANCE MUST BE EARTHED
9.1 Site Wiring
Wiring external to the boiler must be installed in
accordance with the I.E.E Regulations and any local
regulations which apply. Wiring must be completed in
heat resistant cable. (For size, refer to the Technical
Instructions supplied by the burner manufacturer). The
boiler control panel requires a 230V, single phase, 50
Hz supply.
The burner requires a single phase supply and
should be wired in accordance with the instructions
provided by the burner manufacturer.
Fuse ratings for individual boilers are marked on the
appliance data plate. The control panel is supplied
with flying lead and plugs for direct connection to
corresponding sockets supplied with the burner.
Should non-standard connecting wiring be
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necessary due to particular burners or contract
conditions, space is provided in Appendix C of
these instructions for a wiring diagram to be
included.
The method of connection to the mains electricity
supply must facilitate complete electrical isolation of the
single boiler/battery with a contact separation of at least
3 mm in all poles.
The appliance must be isolated from the mains
electricity supply in the event of electric arc welding
being carried out on any connecting pipework.
A mains isolator must be provided adjacent to the boiler
in a readily accessible position. The supply should only
serve the boiler. NOTE! Volt free contact electrical
supplies must also be isolatable where fitted (see note
in control panel). Further details regarding connection
to the electricity supply are given in BS EN 60335, Part
1 or BS 3456, Part 201.
9.2 Indication Signals and Volt Free Contacts
All boilers are fitted with v.f.c. contacts as standard
to enable external indicator lights or alarms to
derive signals for normal run, overheat and lockout.
Note:- These external circuits MUST be isolated before
any service or maintenance procedures are carried out.
Figure 9.2 – Volt Free Contact Set and Wiring
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10.0 BOILER ASSEMBLY
10.1 DUAL BOILERS. ASSEMBLY INSTRUCTIONS.
(NOTE: This assembly instruction relates to Ansty Dual Boilers only. For Ansty Single installations ignore
this Section and move straight to Section 10.2, Casing Assembly Instructions)
10.1.1 - Check that the following items have been delivered in the quantities stated;
2 x Single Boiler Units
2 x Casing Assembly boxes (standard kit for the upper boiler and special kit for the lower boiler)
2 x Control Panels
2 x Burners
1 x Pipework and Bracket Kit
10.1.2 - Select one of the boilers to form the lower section (both modules are identical, so either can be used).
Remove from pallet and locate in desired position within plant room.
10.1.3 - Using a suitably rated hoist and frame elevate the upper boiler slightly from the delivery pallet.
10.1.4 - Remove from the
upper boiler the existing
bracing bracket on the lower
left and right hand sides.
These brackets travel front to
rear of the boiler on either
side as indicated in Figure
10.1.4.
10.1.5 - From the pipework kit locate the replacement brackets, nuts and bolts for fitting to the upper boiler.
10.1.6 - Fit to the boiler both left and right hand brackets ensuring the three bolts at either end are not
tightened to allow for movement when locating to the lower boiler.
10.1.7. - Using the suitably
rated hoist and frame elevate
and locate the upper boiler
above the lower boiler.
Lower the upper boiler into
position.
10.1.8 - Align the bolt holes
as shown and bolt through.
When all four corners have
been positioned and the
bolts fitted, fully tighten the
bolts on both the upper and
lower boilers. The upper
boiler should now be
securely fitted as shown in
Figure 10.1.8
fully
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10.1.9 - Ansty AD540 and AD640 Models
only. To fill gap between upper and lower
boilers fit rear junction plate as indicated in
figure 10.1.9.
IMPORTANT NOTE: THIS JUNCTION PLATE
IS ONLY SUPPLIED WITH TYPE 5 ANSTY
BOILERS (Ansty AD540 & AD 640 MODELS).
For all other models this instruction should be
ignored.
10.1.10 - When correctly located the upper and
lower boiler front plates should touch. However,
the rear plates should have a small gap to
ensure the correct slope of the boilers is
maintained.
10.1.11 - Once the two boilers are securely
fastened together the hoist may be released and
the casings, burners, controls and pipework
fitted.
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10.2 CASING ASSEMBLY
Unpack casing parts and insulation jacket from cardboard packaging. Care must be taken not to lose
packet of fixings which is attached to polythene dust cover.
10.2.1 Boiler Shell Insulation
Wrap the fibre glass insulation jacket (A) around the boiler shell locating the holes in the jacket about the
uppermost fittings and wrapping it around the boiler, fastening it at the bottom with the spring clip supplied (Spring
clip located in polythene bag in control panel packaging). See Fig 10.2.1
Figure 10.2.1 - Insulation Jacket in Flat Pattern.
10.2.2 Assembly of the Staves casing
1) Prepare the staves by inserting the four stoppers, as
shown in fig. 10.2.2
2) Fasten the uprights and the beams to the plates by means of appropriate screws and nuts.
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NOTE : the beam shown in fig , if supplied in the package, must be placed between the two tube panels in order
to support the staves.
3) Insert the staves, with the previously installed stoppers, between the uprights and the beams, as shown in fig
10.2.3
4) After all of the staves have been inserted, install the closing frame using the self-locking screws.
NOTE: If the boiler has upper connections it is necessary to install the special central covers, as shown in fig
10.2.4. If this is not the case, completely cover the upper part with staves and close the boiler with the side
frames.
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Control Panel Installation:
The control panel supplied with the boiler must be installed on the special support supplied in the kit, which must
be fastened to the boiler front beam. Pass the cables through the loopholes within the structure (see fig 10.2.5).
NOTE: if the panel supporting stave is included in the kit (containing the screw holes and the capillary eyelets) it is
recommended that you use it to facilitate adjustment; in this case the panel can be installed both on the left-hand
and the right-hand side of the wall.
Stacked Boilers:
For stacked boilers, 2 kits are supplied: the standard kit for the upper boiler and a special kit for the lower boiler.
The main difference is the control panel support stave is to be mounted where preferred and the two closing
frames supplied in lieu of the upper staves which are not applicable.
Boilers with rear connections :
For boilers with rear connections it is necessary to cover the top of the boiler with the staves and then close with
the side frames as follows :-
1) Fix the vertical and transversal frames to the tube plates using the supplied screws and nuts.
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2) Pass the wires of the bulbs of the control panel through the panel support and then through the cut-out on the
front transversal frame.
3) Fix the control panel support to the front transversal frame using suitable bolts.
NOTE: to avoid deformation of the transversal frame, it is recommended to fix the control panel only after the upper staves have been fitted.
4) Insert the staves, with the previously installed stoppers, between the uprights and the beams, as shown in fig
10.2.6 .
NOTE: the picture does not show the control panel support frame which is supposed to have been already fitted
at this stage.
5) After all staves have been fitted, fix the closing frames by self-threading screws.
6) If not previously fitted, fit the control panel to its support frame with the screws supplied with the control panel.
10.2.3 ANSTY DUAL THERMOSTAT BULBS.
For Ansty Dual boilers, the position of the boiler control panels should be located on the side of the boiler rather
than on the top.
The Bulbs should be positioned as shown in Figure
10.2.7
Key: N6 Bulb wells - TR1 and TR2 are bulbs for
boilers regulation - TS1 1
TS2 2
nd
boiler safety thermostat – TMC boilers
st
boiler safety thermostat -
thermometers.
Figure 10.2.7 - Ansty Dual Assembled
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Figure 10.3 PIPEWORK KITS (Ansty Dual Only)
Dimension A B C D E F G H I DN1 DN2
573405612 TYPE 2 KIT 989 487 385 201 349 350 201 349 772 50 65
573405613 TYPE 3 KIT 1090 487 388 201 355 350 201 355 772 50 65
573405614 TYPE 4 KIT 1090 555 421 228 382 375 227 382 1027 50 80
573405615 TYPE 5 KIT 1090 548 397 234 392 237 234 392 1027 65 80
Item Description 573405612 573405613 573405614 573405615
1 Flow Header 1 1 1 1
2 Cold Return Header 1 1 1 1
3 Warm Return Header 1 1 1 1
4 Junction Longitudinal Member 2 2 2 2
5 Rear Junction - - - 1
6 Screw M10 x 30 12 12 12 12
7 Washer M10 32 32 32 32
8 Nut M10 20 20 20 20
9 Screw M12 x 45 24 24 12 12
10 Nut M12 24 24 12 12
11 Bolt M16 x 60 - - 12 12
12 Flange DN 65 PN 6 3 3 - -
13 Gasket 115 x 76 x 3 3 3 - -
14 Flange DN 80 PN 6 - - 3 3
15 Gasket 133 x 90 x 3 - - 3 3
16 Base 75 x 3 1 1 - -
17 Base 89 x 4 - - 1 1
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10.3.1 - A box of fixings and gaskets for the pipework assembly
kit can be found in the furnace of each boiler. Using nuts and bolts
from this box, attach Cold Return Header (item 2 on list, see page
15) to pipe fittings on left hand side of boiler looking from the rear
as shown in figure 10.3.1, ensuring that correctly sized gaskets
are in place.
10.3.2 - Using nuts and bolts supplied fit Flow Header (Item 1 on
list, see page 15) as shown in figure 10.3.2, ensuring that correctly
sized gaskets are in place.
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10.3.3 - Using nuts and bolts supplied fit Warm Return Header
(Item 3 on list, see page 15) as shown in figure 10.3.3, ensuring
that correctly sized gaskets are in place.
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10.4 Control Panel (Refer to Fig. 10.4.1 & 10.4.2)
The Control Panel supplied with the boiler is made
from self-extinguishing plastic and houses the
regulation and safety instruments, see Figure 10.4.1
By loosening the two screws in the top of the control
panel the upper part of the control panel can be
hinged down to gain access to the terminal board
and uncoil the thermostat and thermometer
capillaries. A copy of the wiring diagram
(reproduced on page 18, Figure 10.4.2) is contained
inside the control panel.
The Control Thermostats (TR1-TR2) have an
operating range of 0°C to 100°C and can be set by
the user by means of the front dial.
Safety Limit Thermostat (TS) has a fixed setting of 110°
C (+0/-6)°C and can be manually reset.
The burner cables, loosely fed through the casing
knockout at an earlier stage of assembly, can now be
wired, carefully following the instructions given on the
wiring diagram, see Figure 10.4.2.
10.5 CONTROL, ANSTY DUAL
The Ansty Dual System comprises 2 boilers of the
same capacity with individual control panels for each
unit. Temperature control is achieved via thermostat
sensors in the common pipework flow manifold. Each
unit can work independently and operate at high and
low fire.
Depending on the type of burner fitted, the control
panel will provide a flying lead terminating in a four
pin plug for connection to a high/low burner.
Two fuses are provided for the fuse holder on the
panel rated at 5A and 6.3A. The correct fuse must
be selected for the burner supplied - refer to burner
instructions supplied separately.
NOTE: - All cables must exit the boiler casing via
the cut out in the bottom right hand edge of the
upper front door and must not be routed adjacent to
the burner mounting plate.
THE CABLES MUST NOT BE ROUTED ACROSS
THE BURNER OR ITS MOUNTING PLATE.
LEGEND
1 PANEL LIVE
2 BURNER SWITCH N. 1
4 HEATING PUMP SWITCH
7 BOILER THERMOMETER
8 BOILER CONTROL THERMOSTAT
9 SAFETY LIMIT THERMOSTAT
11 BURNER HIGH / LOW FLAME THERMOSTAT
12 LIMIT THERMOSTAT TRIP INDICATOR
13 1st STAGE HOURS RUN METER
14 2nd STAGE HOURS RUN METER
Figure 10.4.1 - Ansty Control Panel
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Figure 10.4.2 - Boiler Wiring Diagram
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2
10.6 BURNER CONNECTION
Before installation you are advised to thoroughly clean
the inside of all the fuel supply system pipes in order to
remove any foreign matter that could affect correct
operation of the boiler. See technical specification
tables and check the max pressure value inside the
furnace.
a) Check the internal and external seal of the gas
supply system;
b) Regulate the gas flow according to the power
required by the boiler;
c) Check that the boiler is fired by the correct type of
fuel;
d) Check that the supply pressure is within the
values specified on the burner rating plate;
e) Check that the supply system is sized for the
maximum flow rate necessary for the boiler and
that it is provided with all control and safety
devices provided for by the regulations referred to
above;
f) Check that the boiler room vents are sized in
order to guarantee the air flow established by the
regulations referred to above and that they are in
any case sufficient to obtain perfect combustion.
In particular,
g) Check that the feeding line and the gas train
comply with the regulations in force;
h) Check that all the gas connections are sealed;
i) Check that the gas pipes are not used as earth
connections for electrical appliances.
If the boiler is not going to be used for some time,
close the fuel supply cock or cocks.
IMPORTANT:
burner draught tube and the boiler door are
suitably filled with thermo-insulating material (see
Fig. 10.6.1). The boiler is supplied with a piece of
ceramic rope, should this not suit the burner
used, use a braid of different diameter but same
material.
Check that the air gaps between the
Fig. 5
BOILER
MODEL
ANSTY A75
ANSTY DUAL AD150
ANSTY A90
ANSTY DUAL AD180
ANSTY A120
ANSTY DUAL AD240
ANSTY A160
ANSTY DUAL AD320
ANSTY A220
ANSTY DUAL AD440
ANSTY A270
ANSTY DUAL AD540
ANSTY A320
ANSTY AD640
3
L – Blast tube length (in
mm)
170-180 130
150 - 250 130
170 - 250 130
267-282 145
267-282 145
216 180
216 180
Fig. 10.6.1 - Burner Details
KEY:
1. Burner
2. Boiler door
3. Ceramic fibre material
4. Flange
D – Burner hole
diameter (in mm)
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216
216
C.
0
BLAST TUBE
FIGURE 10.7.1
PENETRATION
REFER TO DIM. L
216
267-282
267-282
267-282
267-282
216
216
216
(mm) (mm) (mm)
DIAMETER LENGTH
/hr
3
m
GAS RATE
BELOW WHICH A
MINIMUM HEAT INPUT
NOMINAL HEAT INPUTS/OUTPUTS DIMENSIONS
HIGH FIRE HEAT INPUT
HEAT
OPERATE (NETT)
BURNER MUST NOT
(NETT)
OUTPUT
(kW)
/hr
3
m
GAS RATE
(kW) (kW)
400 735
6.9
65
5
48
500 735
6.9
65
5
48
480 990
8.6
81
5.5
52
550 990
8.6
5.5
81
52
550 990
8.6
7.4
@ 1013mbar and 15
81
70
3
75 69.8 7.38 35 3.7 400 735 170-180
90 83.7 8.86 35 3.7 400 735 170-180
120 112.2 11.87
160 149.5 15.82
220 204.7 21.66
270 251.2 26.58
320 299.1 31.65
HI/LO
R40GS10D
BURNER DETAILS BOILER DETAILS COMBUSTION CHAMBER DETAILS
MAKE MODEL MODE
MODULATING
R40GS10/M
HI/LO
MODULATING
R40GS20D
R40GS10/M
HI/LO
R40GS20D
RIELLO
MODULATING
R40GS20/M
RIELLO
HI/LO
MODULATING
R40GS20D
R40GS20/M
RIELLO
RIELLO
MODEL
Figure 10.6.2 - Matched Burner/Boiler Combinations (Natural Gas)
BOILER
A75 RIELLO
A90 RIELLO
A120
A160
Figure 10.6.2 – Matched Burner Boiler Combinations (Natural Gas)
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HI/LO
RS34MZ
RIELLO
MODULATING
RS34/MMZ
RIELLO
A220
HI/LO
RS34MZ
RIELLO
MODULATING
RS34/MMZ
RIELLO
A270
HI/LO
RS34MZ
RIELLO
MODULATING
RS34/MMZ
RIELLO
A320
Note To comply with the requirements of the Gas Appliance Directive, only the combinations listed above may be utilised for natural gas applications.
Heat input values quoted above are based on Natural Gas (G20) with a net CV of 34.06 MJ/m
500001119/D
11.0 COMMISSIONING AND TESTING
11.1 Electrical Installation
Wiring MUST be checked by a suitably competent
person. An isolator correctly fused should be sited close
to the boiler. Refer to the burner instructions.
It should be noted that if a 3 phase supply is
required, it should be wired direct to the burner and
a separate 230V single phase supply wired to the
panel.
The boiler is supplied with a remote stop/start circuit for
time clock operation. Any other interlocks, i.e.
Pressurisation unit, BEM System should be wired in
series with the remote stop/start loop.
11.2 Gas Installation
For design see Section 5: GAS SUPPLY.
The whole of the gas installation including the meter
must be inspected and tested for soundness and
purged in accordance with the recommendations of
IGE/UP/1 or IGE/UP/1A as appropriate.
11.3 Water Circulation System
For design see Section 8: WATER SYSTEM.
The system should be thoroughly flushed out with cold
water without the pump in position. Ensure all the
valves are open.
With the pump fitted the system should be filled and air
locks cleared. Vent the radiators and check for leaks.
If the system is unvented the pressurisation unit should
not be utilised for the initial filling. This should be carried
out using a WRC approved double check valve and
temporary filling loop. In order to comply with local
Water Authority Regulations, this loop must be
disconnected when filling is complete. Water treatments
should not be fed through the pressurisation unit unless
permitted by the manufacturer. Check the expansion
vessel cushion pressure as detailed by the
manufacturer's Installer's Guide.
11.4 Commissioning The Boiler
Only competent persons registered for working on
non domestic gas appliances should attempt the
following: Before attempting to commission any
boiler, ensure that personnel involved are aware of
what action is about to be taken and begin by
making the following checks:-
1) Flueway passages to chimney are clear.
2) Adequate ventilation as per Section 7: AIR SUPPLY
exists in the boilerhouse.
3) The system is fully charged with water, ready to
receive heat. All necessary valves are open and the
pump is circulating water.
4) The pipework and valve arrangement is installed to
Hamworthy Heating recommendations in such a way
that water flow rates will be in accordance with Figure
3.3 and Figure 3.4
5) The gas supply pipework is clear of any loose matter,
tested for soundness and purged to IGE/UP/1 or IGE/
UP/1A as appropriate.
11.4.1 Boiler Checks Prior To Lighting
BEFORE starting the boiler, check the following:
a. Check that fuel supply is turned off.
b. Check that electrical supply is isolated
c. Check that electrical installation conforms to
the requirements of these instructions, the IEE
Wiring Regulations for electrical installations,
and any other local regulations which apply.
d. Check boiler shell is undamaged from
transportation.
e. Check all thermostat bulbs are correctly
inserted in the appropriate pocket.
f. Check for water leaks and ensure that both
boiler and heating system is full of water and
properly vented.
g. Check that all drain cocks are closed, and that
all isolating valves in flow and return pipework
are open.
h. Check soundness of gas installation and that
pipework is purged of air, as detailed in I of E
Publications IGE/UP/1 or IGE/UP/1A
respectively. Check that gas meter is
operational and has been checked by the local
region of British Gas. Check that gas meter and
supply is of sufficient size to meet the input
rating of the burner / boiler. Refer to Figure
10.6.2.
i. Check that the burner output is correct for size
of boiler in question, referring to Figure 10.6.2
and the manufacturer’s technical information
supplied with the burner.
Note: Refer to the commissioning procedure in the
burner manufacturer’s literature, before firing
the boiler.
Always adjust the fuel supply upwards from a
low position to ensure that a fuel rich mixture is
not achieved.
11.4.2 Gas fired Boilers
a. Check that ignition electrode and rectification
probe are correctly positioned. Refer to
manufacturer’s technical information supplied
with the burner.
b. Check that ignition electrode and rectification
probe leads are connected.
c. Check blast tube is correctly located, and
securely fastened in place, and firebrick at rear
of combustion chamber is sound and correctly
located.
d. Check burner seats correctly onto burner
mounting plate and is securely fastened in
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place.
e. With firing head separate from burner adjust air
and gas settings, as specified in the
manufacturer’s technical supplied with the
burner.
f. Determine minimum burner gas pressure which
corresponds to required burner output (boiler
input), as follows: 1) From the manufacturer’s
technical information (supplied with the burner)
take burner pressure corresponding to required
burner output. 2) Add combustion resistance (in
mbar), given in Figure 3.3 and 3.4 for the boiler
in question, to obtain gas pressure value to be
measured at burner test point.
g. Open main isolating valve in gas supply to
boiler. Check for leaks throughout gas train and
pipework to burner.
h. Adjust gas supply governor to achieve at least
17.5 mbar (7.0 in wg) at inlet to boiler gas train.
Ensure that maximum pressure of gas train
governor is not exceeded. If a gas booster is to
be fitted, commission in accordance with the
manufacturer’s instructions.
i. Adjust start and main output gas rates as
detailed in the manufacturer’s technical
information supplied with the gas burner.
j. Check that overheat thermostat reset is set,
and that boiler control thermostat and control
system are set to call for heat.
k. Close main isolating valve in gas supply, switch
the boiler on and start the burner. The burner
control will first operate the fan to pre-purge the
boiler, then produce an ignition spark and
attempt to ignite the burner. The flame should
fail to ignite and the burner should go to
lockout.
l. Open main isolating valve in gas supply. If gas
train has separate pilot gas line, open pilot gas
isolating valve and close main gas isolating
valve. Restart boiler/burner. The burner control
will pre-purge, produce an ignition spark and
ignite pilot flame. The main flame should fail to
light, and burner will continue on ignition flame
only. The pilot gas rate can be checked and
adjusted as detailed in the manufacturer’s
technical information supplied with the gas
burner.
IF BURNER FAILS TO LIGHT, BOILER MUST BE
PRE-PURGED BEFORE ATTEMPTING TO
RESTART BURNER. IF BURNER REPEATEDLY
FAILS TO LIGHT, A FULL INVESTIGATION TO
FIND CAUSE SHOULD BE MADE.
m. Stop boiler/burner. Open main gas isolating
valve and restart burner. The burner will prepurge, ignite pilot flame and, after a short delay
of several seconds, the main flame will light.
Adjust the main gas rate as detailed in the
manufacturer’s technical information supplied
with the gas burner.
n. After allowing burner to reach stable firing
conditions for approximately 15 minutes, carry
out combustion gas check. Measure CO
, CO,
2
gas flue temperature, and circulating water
temperature rise across the boiler. The
readings obtained for the appropriate gas
should be as indicated in figure B1.2, Target
Appliance Readings, which should be taken at
both High and Low Settings.
o. After all other adjustments have been made,
set burner air pressure switch as instructed in
burner manufacturer’s technical information
supplied with burner.
p. Check gas pressure at burner head
corresponds with value determined from
burner manufacturer’s technical information as detailed in (f) above.
q. Check gas flow rate at meter. Ensure that all
other appliances served by the meter are
isolated whilst flow rate is checked.
r. Cycle boiler on and off several times to ensure
reliable burner ignition and boiler operation.
Check for gas, water and flue gas leakage.
Tighten all access, flue box and burner
mounting bolts and nuts.
s. Set boiler control thermostat to required
setting, and check operation of heating control
system.
t. Fully familiarise the user with the boiler
operating controls, the main component
functions and safety features.
THESE INSTALLATION AND SERVICING
INSTRUCTIONS SHOULD BE LEFT WITH THE
USER OF THE BOILER FOR FUTURE
REFERENCE.
11.5 External Controls
The external controls used in typical boiler
installations, for both vented and unvented
systems, are shown in Figure B1.1. If different
systems or controls are to be used and there are
any doubts as to the suitability, contact Hamworthy
Heating Technical Department for advice.
11.6 Installation Noise
In order to avoid the possibility of noise from the
installation, care should be taken to follow the
manufacturer’s instructions. Particular attention should
be paid to minimum water flow rates. If acoustic
insulation is added to the boiler, care must be taken
not to impede combustion or ventilation air flow. If in
doubt contact the manufacturer.
11.7 User Instructions
When the above is complete, the boiler owner or their
representative should be made aware of the lighting
and operating instructions . A practical demonstration
should be given describing each functional step. This
Installer's Guide and burner Operating Instructions
should then be handed over to be kept in a safe place
for easy reference.
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12.0 FAULT FINDING
12.1 Fault Finding
Fault finding on the burner control system is detailed
in the burner manufacturers instructions. If the boiler
still cannot be operated satisfactorily after following
these instructions, consult Hamworthy Heating for
assistance.
13.0 SERVICING
A qualified engineer registered for working on non
domestic gas or oil appliances should check and ensure
that the flue, its support and terminal, the ventilation to
the boiler house, safety valve, drain, water filter if fitted,
pressure gauge, etc.; are in a serviceable and working
condition and still comply with the relevant standards
and codes of practice - see Appendix A.
The boiler should be serviced at regular intervals,
not exceeding TWELVE months for gas fired boilers.
When carrying out boiler servicing always consider
both your own safety and that of others. The use of
protective equipment (e.g. eye protection, face
mask, protective gloves, etc.) is recommended
where necessary.
13.1 Initial Inspection
a. Operate boiler and check for any signs of
unsatisfactory operation, water leaks, gas leaks
or unusual noise from burner motor.
b. After allowing burner to reach stable firing
conditions for approximately 15 minutes, carry
out combustion gas check. Measure CO
, CO,
2
flue gas temperature and water temperature
rise across the boiler. The readings obtained
should be noted for reference upon completion
of the servicing procedure.
c. Measure either gas pressure at burner head
and check value is correct for size of boiler in
question.
d. Check operation of both boiler and heating
system controls, then set boiler control
thermostat at OFF.
Allow the boiler/burner to cool.
13.2 Burner Service Procedure.
SWITCH OFF ELECTRICAL SUPPLY TO BOILER
AT ISOLATOR AND SHUT OFF FUEL SUPPLY
TO BOILER.
Clean and service the burner in accordance with
the burner manufacturers instructions.
a. Disconnect electrical and fuel connections to
burner, as necessary.
b. Disconnect burner from mounting flange and
remove from front of boiler.
13.3 Boiler Service Procedure
a. With the burner door hinged open the
combustion chamber and fire tubes are
accessible. Carefully remove all turbulators
from the fire tubes.
b. Using a suitably sized brush, clean each fire
tube straight through to the flue connector box.
c. Remove the cleaning door at the bottom of the
flue connector box and clean out deposits with
brush and vacuum cleaner.
d. Brush and vacuum combustion chamber.
e. Replace cleaning door ensuring it is correctly
sealed.
f. Replace all turbulators in fire tubes, long
sections first followed by short sections at front
of boiler.
g. Close door and tighten. Replace seal if
necessary.
h. Refit burner if necessary. Reconnect fuel and
electrical supplies.
i. Turn on fuel supply and check for soundness
of fuel supply pipework.
j. Check all flue joints for integrity.
k. Check ventilation ducts / grilles to boiler room
and ensure they are clean.
l. Re-commission boiler as detailed in relevant
parts of Section 11.0. Commissioning.
14.0 REPLACEMENT OF PARTS
There are a number of components listed on next page
which can be replaced simply and quickly by following
the given procedure. In each case the operation of
each replaced component must be checked by carrying
out the appropriate part of the commissioning
procedure. See Section 11.0: COMMISSIONING &
TESTING.
NOTE: Isolate all electrical supplies to the boiler
and turn off the gas supply before removing
controls cover and commencing any servicing or
component exchange procedure.
Note :- For replacement of burner components
refer to the burner manufacturer’s instructions.
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14.1 - Replacement Parts / Recommended Spares
1. Sight Glass - HHL Pt No. 573405602
2. Gasket - HHL Pt No. 573405603
3. Ceramic Insulation* - HHL Pt No. 573405604
4. Ceramic Insulation** - HHL Pt No. 573405605
* For all Ansty Models
except A270, A320,
AD540 and AD640
** For Ansty Models
A270, A320, AD540
and AD640 only
7. Thermometer & Temp. Gauge
HHL Pt No. 573405608
8. Burner / Pump On/Off Switch
HHL Pt No. 573405609
5. Control Thermostat - HHL Pt No. 573405606
6. Limit Thermostat - HHL Pt No. 573405607
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9. Rope Seal for Boiler Door - HHL 573405610
10. Flue Collector Seal - HHL Pt No. 573405611
11. Relay - HHL Pt No. 533901204
500001119/D
APPENDIX A - GENERAL REQUIREMENTS
A1.1 Related Documents.
Gas Safety (Installation and Use) Regulations
1994 – (As amended). It is the law that all gas
appliances are installed by competent persons, in
accordance with the above regulations. Failure to
install appliances correctly could lead to
prosecution.
It is in your own interest, and that of safety, to
ensure that this law is complied with.
The installation of the boiler MUST be in accordance
with the relevant requirements of the Gas Safety
Regulations, Building Regulations, I.E.E. Regulations
and the bylaws of the local water undertaking.
The installation should also be in accordance with any
relevant requirements of the local gas region and local
authority and the relevant recommendations of the
following documents :-
British Standards
BS.5854 - Code of practice for flues and flue
structures in buildings. See para 5 (3.6).
BS.6644 - Specification for installation of gas fired
hot water boilers of rated inputs between 60kW and
2MW.
BS.6700 - Design, Installation, testing and
maintenance of services supplying water for
domestic use.
BS.6880 - Code of practice for low temperature hot
water heating systems of output greater than 45kW.
Part 1: Fundamentals & design considerations.
Part 2: Selection of equipment.
Part 3: Installation, commissioning &
Maintenance.
BS 7074: Application, selection and installation of
expansion vessels and ancillary equipment for sealed
water systems. Part 2: Code of practice for low and
medium temperature hot water systems.
BS.CP342 - Code of practice for centralised hot
water supply. Part 2: Buildings other than individual
dwellings.
I. Gas E. Publications
IGE/UP/1 Soundness testing and purging of
industrial and commercial gas installations.
IGE/UP/1A Soundness testing and direct purging of
small low pressure industrial and commercial natural
gas installations.
IGE/UP/2 Gas installation pipework, boosters and
compressors in industrial and commercial premises.
IGE/UP/10 Installation of gas appliances in industrial
and commercial premises.
Health and Safety Executive :Guidance note PM5 - Automatically controlled steam
and hot water boilers.
CIBSE Publications:- "CIBSE Guide"
It is impractical in this document to specify all relevant
information, but the following extracts from the above
references are emphasised since failure to comply with
these requirements will almost certainly result in an
unsatisfactory installation.
A1.2 Feed Water Quality
If the boiler feed water has a high degree of
hardness, it is recommended that the water be
treated to prevent precipitation of scale or sludge in
the boiler water passageways. Details of additives
can be obtained from any reliable manufacturer of
water treatment products or the local water
authority.
It should be noted however, that even if the boiler water
is of average hardness, not requiring treatment,
subsequent draining of the system for repair or constant
make-up water due to an undetected leak will cause
additional deposits and gradual build-up of scale. It is
essential therefore, that leaks are attended to promptly
and draining is kept to an absolute minimum.
It is recommended that the system be flushed out at
least twice before any water treatment is added. If
any doubt exists regarding the internal cleanliness
of an old system, consideration should be given to
the fitting of a coarse filter in the return pipework to
the boiler(s).
A1.3 Water Treatment
If the boiler is to be installed in an existing
system where there could be frequent losses
from the system or if the hardness of the water
is greater than 10 F, it will be necessary to use a
filter and a softener for system water and control
the pH above 8-9.
The most common reactions that occur in heating
systems are:
a. Scaling
Scale obstructs heat transfer between the
combustion gases and the water, causing an
abnormal increase in the temperature of the metal
and therefore reducing the life of the boiler.
Scale is found mostly at the points where the wall
temperature is highest and the best remedy, at
construction level, is to eliminate areas that
overheat.
Scale creates an insulating layer, which reduces the
thermal transfer of the boiler, affecting system
efficiency. This means that the heat produced by
burning the fuel is not fully transferred and is lost to
the flue. See Fig A1.3
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b. Corrosion on the Water Side
Corrosion of the metal surfaces of the boiler on the
water-side is due to the passage of dissolved iron
through its ions (Fe+). In this process the presence
of dissolved gases and in particular of oxygen and
carbon dioxide is very important. Corrosion often
occurs with softened or de-mineralised water, which
has a more aggressive effect on iron (acid water
with Ph <7): in these cases, although the system is
protected from scaling, it is not protected against
corrosion and the water must be treated with
corrosion inhibitors.
A1.4 Adequate Water Flow
Care should be taken in the initial design and layout
having due regard for adequate water flow through the
boilers and the influence of the system controls.
It is recommended that the system design should
ensure a minimum return temperature of 50 °C.
If the temperature/flow rates of the application
cannot meet those given in Figures 3.3 & 3.4 it may
be necessary to incorporate mixing valves and
shunt pumps to ensure that the boiler will operate
satisfactorily. Figure 3.3 & 3.4 shows recommended
and minimum water flows required with the
associated pressure losses. The control system and
valves, where fitted, should be regulated to avoid
lower flows occurring.
A1.5 Time Clock Control
In order to avoid local overheating and progressive
calcium deposition at zero flow conditions where
boilers are operated from time clocks, provision
should be made for a 5 minute circulating pump
over-run after the last boiler has ceased firing.
NOTE! Time clocks should not interrupt live, neutral or
earth connections, see Section 9.0: ELECTRICAL
SUPPLY for details. See Figures 10.4.2 for wiring
details.
A1.6 Minimum System Water Pressure
To comply with guidance note PM5 (Health and Safety
Executive), the minimum pressure requirements at the
boiler are given below as examples :-
1) Single installed boiler running at 82°C flow
temperature. Minimum head required is not less than 2
metres or 0.2 bar.
2) Single installed boiler running at 95°C flow
temperature. Minimum head required = 5.1 metres or
0.5 bar. See Section 8.0
3) Modular boiler installation running at 82°C flow
temperature and 11°C rise across system. Minimum
head required = 4.3 metres or 0.42 bar.
4) Modular boiler installation running at 82°C flow
temperature and 15°C rise across system. Minimum
head required = 9.4 metres or 0.92 bar. See Section
8.0 for Pressurised Water Systems.
%
Key
% = % fuel
not used
mm = mm of
scale
Figure A1.3 - Scale Deposition Chart
mm
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APPENDIX B - OPTIONAL EXTRAS
System Temperatures
Each Ansty boiler is equipped with two return
connections to maximise the condensing
performance of the system. The normal
(higher) temperature connection is to suit
typical 60/80
fixed temperature fan coil units or calorifiers for
hot water (DHW) production. The condensing
(lower) temperature connection, typically
50/30OC, allows the low return water
temperatures to be maintained without the
dilution effect of the fixed temperature circuits.
The installation of Ansty condensing boilers in
commercial heating and hot water systems
offers a wide choice of design options and
applications. The systems shown here are
typical and should be considered for general
guidance only.
Example 1
Typical boiler installation comprising constant
temperature domestic hot water and variable
temperature radiator circuits. Flow rate
returning from the calorifier to the high
temperature return should equate to the boiler
minimum flow rate. Flow rate returning from the
compensated radiator circuit may be reduced
to zero due to the water mass of the boiler.
Example 2
Typical boiler installation comprising constant
temperature air handling units and variable
temperature radiator circuits. Flow rate
returning from the A.H.U. circuit to the high
temperature return should equate to the boiler
minimum flow rate. Flow rate returning from the
compensated radiator circuit may be reduced
to zero due to the water mass of the boiler.
Example 3
Typical boiler installation comprising variable
temperature underfloor heating and variable
radiator circuits. Flow rate returning from the
compensated radiator circuit and underfloor
heating circuit may be zero due to the water
mass of the boiler. The high temperature return
connections need to be blanked off.
Note: Due to its thermal mass, the Ansty boiler
may fire with zero flow conditions. The boiler
will switch off its temperature controls until
either the boilers internal temperature drops or
return water re-commences flow to the boiler.
O
C circuits which would supply
Example 1 - Compensated Radiator Circuit, with Domestic Hot Water
Example 2 - Compensated Radiator Circuit, with Air Handling Units
Example 3 - Compensated Radiated Circuit, with Underfloor Heating
Figure B1.1 – Optional Systems
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Fuel
Type
Natural Gas
G20
BOILER MODEL A75 A90 A120 A160 A220 A270 A320 A150 A180 A240 A320 A440 A540 A640
CO2 (DRY) 9 - 10%
CO Less than 100 ppm (air free)
Flue Gas
Temp Rise
Temp Rise
Across Boiler
O
C
225 OC
Less than 20OC
Figure B1.2 – Target Appliance Readings.
Note ! The above target values provide an approximate guide with which to attain nominal operation of the
appliance so as to satisfy the requirements of the Boiler Efficiency Directive
NOTES
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Hamworthy Heating Accredited Agents
Southern Ireland (Sales & Service)
HEVAC Limited
Naas Road, Dublin 12, Ireland
tel: 00 353 141 91919 fax: 00 353 145 84806
email: info@hevac.ie
Northern Ireland (Sales & Service)
HVAC Supplies Limited
Unit A6, Dargan Court, Dargan Crescent, Belfast BT3 9JP
tel: 028 9077 7737
email: hvacsupplies@btconnect.com
Scotland (Sales & Service)
McDowall Modular Services
2 Penson Road, Queenslie Industrial Estate, Glasgow, G33 4AG
tel: 0141 336 8795 fax: 0141 336 8954
email:
MMS.McDowallModularServices@hamworthy-heating.com
North East England (Service)
Allison Heating Products
12 Sunnyside Lane, Cleadon Village, Sunderland SR6 7XB
tel: 0191 536 8833 fax: 0191 536 9933
email: allison.heating@gmail.com
Hamworthy Heating Customer Service Centre
Sales
tel: 01202 662552
email: sales@hamworthy-heating.com
Technical Enquiries
tel: 01202 662505
email: technical@hamworthy-heating.com
Servicing
tel: 01202 662555
email: service@hamworthy-heating.com
Spares
tel: 01202 662525
email: spares@hamworthy-heating.com
British engineering excellence from Hamworthy Heating;
the commercial heating and hot water specialists.
Customer Service Centre
Hamworthy Heating Limited,
Wessex House,
New Fields Business Park,
Stinsford Road,
Poole,
Dorset,
BH17 0NF
Telephone: 01202 662500
Fax: 01202 662522
Email: service@hamworthy-heating.com
Website: www.hamworthy-heating.com
Hamworthy reserves the right to make changes and improvements which may necessitate alteration to the specication without prior notice.
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