Data sheet
Oil Preheaters Types FPHE 3, 5 and 10
Application |
FPHE oil preheaters are designed for oil burners with |
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capacity up to 12 kg/h using standard fuel oil with |
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viscosity up to 10 cSt. |
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The preheaters are available with different heating |
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elements and thermostats for selection of release |
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time and temperature. |
Features:
•Standard types of gasoil with viscosity of max. 10 cSt. (at 20°C)
•Capacity up to 12 kg/h
•Max. temperature limitation
•Improved atomisation
•High average efficiency of the burner
Identification |
The preheater is laser engraved with the following information (example): |
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FPHE 5 |
Type |
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030N5004 |
Code no. |
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230 V |
Voltage |
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30-110 W |
Power consumption |
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130805 |
Date of manufacture |
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Function |
Cold start |
Operation |
When the boiler thermostat cuts-in, voltage is applied to the PTC heating element and the oil in the heat exchanger is heated until it reaches the cut-in temperature of the preheater thermostat (see below table). Now the burner performs a normal starting sequence.
Warm start
If the oil temperature in the preheater is higher than the cut-out temperature of the preheater thermostat, the burner starts immediately.
Release times and temperatures
If the oil temperature is low and the flow rate is high, compared with the preheater capacity, the preheater thermostat might cut off during
operation. To avoid this an oil burner control with holding function must be used.
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Thermostat 60/32 & 60/45 |
Thermostat 73/60 |
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Type |
PTC |
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Release time, |
Release temp. |
Release time, |
Release temp. |
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seconds |
in outlet, °C |
seconds |
in outlet, °C |
FPHE 3 |
40 |
80 |
22 |
- |
- |
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50 |
130 |
36 |
- |
- |
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FPHE 5 |
70 |
75 |
26 |
130 |
43 |
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120 |
50 |
22 |
80 |
32 |
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2 x 50 |
120 |
44 |
- |
- |
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FPHE 10 |
2 x 70 |
110 |
41 |
150 |
60 |
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2 x 120 |
65 |
39 |
85 |
49 |
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The figures given are measured average values on cold start and without blown air. Note that the PTC element continues to heat during prepurge.
© Danfoss | 2019.07 |
VD.FB.C3.02| 1 |
Data sheet |
Oil Preheaters Types FPHE 3, 5 and 10 |
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Technical Data |
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FPHE 3 |
FPHE 5 |
FPHE 10 |
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Oil types |
Standard fuel gas oil and fuel gas oil |
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acc. to DIN 51603-6 EL A (bio content, FAME) |
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Nominal voltage* |
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230 V, 50-60 Hz |
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Contact load, thermostat |
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10 (3) A - 250 V |
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Max. permissible pressure |
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30 bar |
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Capacity |
max. 3 kg/h |
max. 6 kg/h |
max. 12 kg/h |
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Max. ambient temperature |
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105°C |
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Storage temperature |
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-20 to 105°C |
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Max. pressure drop |
0.03 bar at 3 kg/h |
0.05 bar at 5 kg/h |
0.25 bar at 10 kg/h |
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Recommended tightening torque |
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15 to 20 Nm |
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Viscosity |
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max. 10 cSt. at 20°C |
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* Working voltage: 100 to 265 V, 50-60 Hz
Temperature / capacity
Power consumption / capacity
2 | VD.FB.C3.02 |
© Danfoss | 2019.07 |
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