RBI Futera Fusion XLF Operations Instructions download pdf (Page 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

ΔT = 15°F ΔT = 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

ΔT = 20°F ΔT = 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

ΔT = 25°F ΔT = 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

ΔT = 30°F ΔT = 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.

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RBI Futera Fusion XLF Operations Instructions Page 13

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