13
FUTERA FUSION INSTALLATION AND OPERATION INSTRUCTIONS
CAUTION: A temperature rise outside of the range
listed in Table 7 indicates that the fl ow rate through the
heat exchanger is incorrect which will damage the heat
exchanger voiding the warranty! The maximum
allowable temperature rise is 35°F,
19.4°C
.
The maximum allowable fl ow rate through a Futera
Fusion boiler is 97 GPM,
6.1 L/s
on 500 through 1000
models and 136 GPM,
8.6 L/s
for 1250 through 2000
models. The Cupro-Nickel heat exchanger allows for 108
GPM,
6.8 L/s
on 500 through 1000 models and 151 GPM,
9.5 L/s
on 1250 through 2000 models.
Table 7 - Temperature Rise Table
Δ
T = 15°F
Δ
T = 8.3°C
Model
Flow Rate Total Loss*
Flow Rate
Total Loss*
Number
GPM Ft
L/s kPa
500
58.0
8.8
3.7
26.3
Δ
T = 20°F
Δ
T = 11.1°C
Model
Flow Rate Total Loss*
Flow Rate
Total Loss*
Number
GPM Ft
L/s kPa
750
65.3
10.5
4.1 31.4
1250
108.8
11.6
6.9 34.7
Δ
T = 25°F
Δ
T = 13.9°C
Model
Flow Rate Total Loss*
Flow Rate
Total Loss*
Number
GPM Ft
L/s kPa
750
52.2 7.7
3.3 23.0
1250
87.0 8.2
5.5 24.4
1500
104.4 11.6
6.6 34.7
1750
121.8 14.7
7.7 43.9
Δ
T = 30°F
Δ
T = 16.7°C
Model
Flow Rate Total Loss*
Flow Rate
Total Loss*
Number
GPM Ft
L/s kPa
1000
58.0 9.5
3.7 28.4
1500
87.0 8.5
5.5 25.4
1750
101.5 10.6
6.4 31.7
2000
116.0 13.8
7.3 41.2
*Includes primary, secondary, mixing valve and piping.
Low Water Cutoff
If a boiler is installed above any radiation elements it must
be fi tted with a low water cutoff device.
Refer to the wiring diagram supplied with the boiler/water
heater for proper wiring connections.
Expansion Tank & Air Separator
An expansion tank or other means to control thermal
expansion must be installed in the heating system. An
expansion tank must be installed close to the boiler on the
suction side of the pump. An air scoop and automatic air
vent must also be installed to eliminate air trapped in the
system.
Primary/Secondary Piping
Figure 9 shows a typical primary/secondary piping system.
Boilers connected to heating systems using zone valves,
zone pumps, or systems that have excessive fl ow rates
must be isolated from these systems to protect the boiler.
Multiple Boiler Systems
Systems using multiple boilers can also be installed using
a primary/secondary manifold system, Figure 11.
Piping For Use With Cooling Units
The boiler, when used in connection with a refrigeration
system, must be installed so the chilled medium is piped
in parallel with the boiler. Appropriate valves must be used
to prevent the chilled water from entering the boiler.
When a boiler is connected to a heating coil that may be
exposed to refrigerated air from an air handling device, the
piping system must be equipped with fl ow-control valves
or some other automatic means of preventing gravity
circulation of the boiler water during the cooling cycle.
