High efficiency condensing combination boilers
15
Technical Data
HeatMaster® 35TC
HeatMaster® 85TC
Fuel
Natural Gas
LPG
Natural Gas
LPG
Input max/min
kW
34.9/10.0
30.6/10.0
85.0/17.2
85.0/17.2
Output max/min
kW
34.1/9.8
29.9/9.8
82.5/16.5
82.5/16.5
Efficiency hot water mode
%
105.9
105.9
103.9
103.9
Efficiency heating mode (30% load EN677)
%
108.5
108.5
107.8
107.8
Seasonal efficiency
%
96.2*
99.77*
96.4*
99.03*
NOx Rating (EN483)
mg/kWh
28.0
72/31
35.0
85/27
Total capacity
L
189
189
315
315
Primary capacity
L
108.5
108.5
125
125
Gas connection (male)
Ø
3/
4
"
3/
4
"
3/
4
"
3/
4
"
Primary flow & return connection (female)
Ø
1
"
1
"
1
1/
2
"
1
1/
2
"
Secondary hot water Connection (male)
Ø
1
"
1
"
1
"
1
"
Flue connection
Ø mm
80/125
80/125
100/150
100/150
Max length concentric flue
mtr
20
20
8
8
Nox class (EN483)
class 5
class 5
class 5
class 5
Weight empty
kg
174
174
284
284
Natural gas flow rate - 20mbar
m
3
/h
3.7
-
8.99
-
Pressure drop
mbar
30
30
200
200
Maximum operating temperature
°C
90
90
90
90
Maximum operating pressure Primary: 3 bar Secondary: 10 bar *Seasonal Efficiency Building Regs. L2A & L2B: Section 2.4 equation 2.
HeatMaster® 35TC
HeatMaster® 85TC
Litres in first 10 minutes
40°C
472
868
Litres in first 10 minutes
45°C
389
718
Litres in first 10 minutes
60°C
243
413
Litres in first hour
40°C
1322
3076
Litres in first hour
45°C
1116
2513
Litres in first hour
60°C
731
1594
Continuous flow 40°C
Ltrs/hr
1070
2713
Continuous flow 45°C
Ltrs/hr
917
2325
Continuous flow 60°C
Ltrs/hr
642
1617
Please Note:
Performance data assumes a primary flow temperature of 90°C and a domestic cold water supply of 10°C
Performance Data
HeatMaster® 35TC-85TC
Total condensing storage
combination boiler -
Sedbuk A rated.
With the high levels of building insulation now in place in most
properties, the requirements for heating output are reducing – this
trend is set to continue with some experts predicting a drop in the
boiler load due to heating from around 75% to as low as 45%. At the
same time, hot water usage is increasing year-by-year as demand rises
for luxury bathing facilities such as high performance showers and spa
baths. If hot water demand has risen to 55% of the boiler load, the
natural progression is to gain as much efficiency in hot water mode as
possible.
The HeatMaster TC can also be used as a stand alone water heater.
MCBA electronic control fitted as standard. Managing boiler and
burner functions, this helps reduce the stop/start cycle significantly,
ultimately saving fuel and component wear and tear.
Additional controls available, please discuss your requirements with
our technical department.
High efficiency condensing combination boilers
14
Heatmaster
Heatmaster
35 TC
85TC
A
1720mm
2145mm
B
600mm
690m
C
500mm
580mm
D
80mm
100mm
E
125mm
150mm
F
140mm
160mm
G
1700mm
2095mm
H
670mm
725mm
I
110mm
125mm
J
100mm
105mm
K
200mm
270mm
L
960mm
1210mm
M
170mm
235mm
N
230mm
240mm
Hot water outlet
Gas connection
Heating flow
Heating return
Cold water inlet
How does it work?
Heating
The heating return enters the lower
circuit of the boiler, which allows the
boiler to operate in condensing mode.
The upper circuit of the HeatMaster TC
is kept at a consistently high
temperature due to the internal shunt
pump which ensures that the primary
water circulates around the heat
exchanger flue tubes.
Hot Water
With the upper circuit maintained at a
high temperature, the HeatMaster TC
is always ready to supply hot water on
demand. The cold water enters
through the dome at the base of the
heat exchanger and is pre-heated
before entering the hot water tank.
The low temperature of the bottom
circuit results in continuous
condensation of the flue gases in hot
water mode.
Heating and Hot Water
Once up to temperature, the
HeatMaster TC is capable of producing
heating and hot water simultaneously.
Dimensions
