Modulating Burner
The HeatMaster 71 and 101 are fitted with the
BG2000-M modulating burner, which has a metal fibre
(NIT) flame tube and smooth and near-silent ignition
and operation - ideal for use in applications where
burner noise must be kept to a minimum.
High efficiency combination boilers
21
Technical Data
Dimensions
HeatMaster® 71-101
High performance combined
boiler and water heater with fully
modulating burner technology.
The HeatMaster is a high performance hot water producer: its annular
Tank-in-Tank holds a volume of hot water for peak demand. This
combines the advantages of a hot water producer with integrated
storage and of an instantaneous water heater, while avoiding the
disadvantages of space, cost and efficiency.
The HeatMaster has a primary circuit and can therefore also be used as
a central heating boiler.
Exceptional Performance
The MCBA electronic controller regulates the boiler (start-up, safety,
modulation), the shunt pump and the heating pump in response to
hot water and heating demand. The MCBA offers numerous advanced
features:
- A large burner modulation range - down to less than 30%
- Extremely accurate hot water priority: even very small draw-offs are
immediately detected
- The hot water tank is always kept at an optimum temperature
- Excellent hot water performance
- Energy efficiency is optimised in both hot water and heating modes.
Product Features
• High performance
fully modulating
combined
boiler and water heater
• Stainless steel Tank-in-Tank design
• Low-NOx premix natural gas/LPG modulating burners
• Can also be used as a stand-alone water heater
• Anti-Legionellae: hot water stored at a consistently high
temperature
• Built-in primary circuit shunt pump
• Fully insulated with rigid polyurethane foam
• Stove enamelled casing
• Control panel including digital MCBA controller
complete with self diagnostic system and combined temperature
and pressure gauge
• Vented or unvented use, with mains pressure SystemPaks available
High efficiency combination boilers
20
HeatMaster® 71
HeatMaster® 101
Fuel
Natural gas/LPG
Natural gas/LPG
Burner options
type
BG2000-M
BG2000-M
Input
kW
20 to 69.9
25 to 107/22 to 110
Maximum output
kW
18.4 to 63
23 to 96.8/20.2 to 99
Primary capacity
L
108
130
Total capacity
L
239
330
Heating surface area
m
2
3.14
3.95
Primary circuit pressure drop
mbar
46
83
DHW tank pressure drop
mbar
45
180
Flue circuit pressure drop
mbar
0.6
1.4
DHW connection (male BSP)
Ø
1"
1"
Primary connection (female BSP)
Ø
1
1/2
"
1
1/2
"
Flue connection
Ø mm
150
150
Burner air intake connection
Ø mm
80 (BG2000-M)
100 (BG2000-M)
Flue connection options
type
B23/C13/C33/C53
B23/C13/C33/C53
Weight empty
Kg
282
335
Weight full
Kg
521
665
Minimum working gas pressure
mbar
20(Nat Gas)/37(LPG)
20(Nat Gas)/37(LPG)
Gas flow rate
m
3
/h
2.12 to 7.4(Nat Gas/0.82 to 2.86 (LPG)
2.65 to 11.32(Nat Gas/0.9 to 4.5(LPG)
Maximum operating temperature
°C
90
90
Maximum operating pressure Primary: 3 bar Secondary: 10 bar
Gas connection - HM101: 1"
- HM71:
3/4
"
HeatMaster® 71
HeatMaster® 101
A
1743mm
2093mm
B
1630mm
2030mm
C
680mm
680mm
D
937mm
937mm
E
680mm
680mm
F
390mm
390mm
G Ø
150mm
150mm
H
1289mm
1693mm
J
285mm
285mm
K
1720mm
2120mm
Performance Data
HeatMaster® 71
HeatMaster® 101
Litres in first 10 minutes
40°C
646
905
Litres in first 10 minutes
45°C
543
777
Litres in first 10 minutes
60°C
346
514
Litres in first hour
40°C
2133
3172
Litres in first hour
45°C
1794
2680
Litres in first hour
60°C
1219
1813
Continuous flow 40°C
Ltrs/hr
1835
2776
Continuous flow 45°C
Ltrs/hr
1573
2379
Continuous flow 60°C
Ltrs/hr
1067
1665
Reheat time to 60°C
Min
16
13
Note:
The above performances are based on the hot water being blended at point of use,
with a boiler temperature of 90°C and a domestic cold water inlet of 10°C.