Relief Valve - RBI Dominator Series Installation & Operating Instructions Manual

Relief Valve

Pipe the discharge of the pressure relief valve to prevent scalding in
the event of a discharge, see Figure 10. Th e discharge piping must be
sized the same as the pressure relief valve outlet and installed to allow
complete drainage of both the relief valve and the discharge piping.
Relief Valve Piping
Figure 10
Never install any type of valve between the boiler/
water heater and the relief valve or an explosion causing
extensive property damage, severe personal injury or
death may occur!
Flow Switch
Th e fl ow switch supplied with the boiler/water heater must be wired
to the terminal strip in the control panel to prevent the boiler from
fi ring unless there's adequate water fl ow through the unit. Th e fl ow
switch must be installed in the supply piping adjacent to the boiler
outlet connection.
Failure to properly install the fl ow switch may result
in damage to the boiler/water heater heat exchanger
voiding the warranty!
14
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Table 7 Temperature Rise Table
ΔT = 15°F
Flow Rate Pres. Drop
Model
Number GPM
300 34.0
400 45.4
600 68.1
750 85.1
900 102.1
1050 119.1*
ΔT = 20°F
Model Flow Rate Pres. Drop
Number GPM
500 34.8
750 52.2
1000 69.6
1250 87.0
1500 104.4
1750 121.8
2000 139.2
ΔT = 25°F
Model Flow Rate Pres. Drop
Number GPM
300 43.4
400 58.2*
600 72.8
750 87.1
900 101.3
1500 116.5
1350 91.9
1500 102.1
ΔT = 30°F
Model Flow Rate Pres. Drop
Number GPM
600 34.0
750 42.6
900 51.1
1050 59.6
1350 76.6
1500 85.1
1950 110.6*
2100 119.1*
ΔT = 35°F
Model Flow Rate Pres. Drop
Number GPM
750 36.5
900 43.8
1050 51.1
1350 65.6
1500 72.9
1950 94.8
2100 102.1
**Flow exceeds recommended maximum use a greater temperature
rise or consult manufacturer. Cupro-nickel heat exchanger should be
considered.
l
ΔT = 8.3°C
Flow Rate Pres. Drop
Ft L/s kPa
0.22 2.1 0.6
0.49 2.9 1.5
1.30 4.3 3.8
2.35 5.4 6.9
3.84 6.4 11.3
6.23 7.5 18.4
ΔT = 11.1°C
Flow Rate Pres. Drop
Ft L/s kPa
0.36 2.2 1.1
1.08 3.3 3.2
2.37 4.4 7.0
1.46 5.5 4.3
2.46 6.6 7.3
3.84 7.7 11.3
5.63 8.8 16.6
ΔT = 13.9°C
Flow Rate Pres. Drop
Ft L/s kPa
0.09 1.3 0.3
0.19 1.7 0.6
0.51 2.6 1.5
0.91 3.2 2.7
1.49
3.9 4.4
2.42 4.5 7.1
4.74 5.8 14.0
6.31 6.4 18.6
ΔT = 16.7°C
Flow Rate Pres. Drop
Ft L/s kPa
0.36 2.1 1.1
0.65 2.7 1.9
1.06 3.2 3.1
1.73 3.8 5.1
3.38 4.8 10.0
4.50 5.4 13.3
9.20 7.0 27.1
11.27 7.5 33.2
ΔT = 19.4°C
Flow Rate Pres. Drop
Ft L/s kPa
0.49 2.3 1.4
0.80 2.8 2.4
1.30 3.2 3.8
2.54 4.1 7.5
3.38 4.6 10.0
6.91 6.0 20.4
8.47 6.4 25.0