Instruction Manual
D103694X012
September 2018
Electric Pilot Heater
SUMMARY
Introduction ......................................................................... 1
Characteristics .................................................................... 2
Labelling ............................................................................ 2
Dimensions and Weights ................................................... 2
Installation .......................................................................... 3
Commissioning .................................................................. 4
Maintenance ...................................................................... 4
Spare Parts ........................................................................ 5
Type RPE
Declaration of Conformity ................................................... 6
WARNING
!
Failure to follow these instructions or to
properly install and maintain this equipment
could result in an explosion and/or re
causing property damage and personal
injury or death.
Fisher™ electric pilot heater must be
installed, operated and maintained
in accordance with federal, state and
local codes, rules and regulations and
Emerson Process Management Regulator
Technologies, Inc. instructions.
If the electric pilot heater vents gas or leak
develops in the system, service to the unit
may be required. Failure to correct trouble
could result in a hazardous condition.
Call a gas service person to service the unit.
Only qualied person must install or service
the device.
Figure 1. Type RPE
Product Description
The electric pilot heater Type RPE is used for reheating gas
supplying pressure reducing regulator pilots to avoid the
inconveniences caused by freezing which occurs during
large pressure drops and/or low ambient temperatures.
A “regulator bottom” version exists.
The Type RPE consists of :
• An explosion-proof junction box
• A thermometer pocket containing the heating element and
a probe
INTRODUCTION
Scope of the Manual
This manual provides installation, startup, maintenance
and parts ordering information for the electric pilot heater
Type RPE.
• A heater tube (not present on “regulator bottom” version)
• A thermostat in charge of temperature regulation
The Type RPE is in conformity with the Directive for
Equipment or protective system intended for use in
potentially explosive atmospheres 2014/34/UE.
It is classied under group II, category 2.
190
Ø 90
Ø 78
230
Type RPE
CHARACTERISTICS
Table 1. Electric Pilot Heater Type RPE Characteristics
OPERATING PRESSURE
Heater tube
Thermometer pocket
ELECTRICAL MATERIAL FOR EXPLOSIVE ATMOSPHERES
Group according to directive 2014/34/UE Group II
Category according to directive 2014/34/UE Category 2
Protection Ex db IIC T2 Gb
Certicate CML 18 ATEX 1081
Power supply 230 V 50-60 Hz
Power consumption 140 W
Recommended operating temperature 0 to 30 °C
Max. allowable admitted temperature 60 °C
RECOMMENDED THERMOSTAT SETTINGS
Selector for temperature A range 0/30
Adjustment for B setting 30
Differential selector C 2
PS 100 bar max.
Materials
Heater tube Steel
Thermometer pocket Steel
TEMPERATURE MEASUREMENT
Interchangeable thermic probe 10 kΩ
HEATER
Two interchangeable heating cartridges 280 W - 230 V
Connected in series 140 W
TEMPERATURE REGULATION RANGE
Thermostat - 30 to + 90 °C
POWER SUPPLY
Power relay
PROTECTION
Thermostat 2 A
Power relay 2 A
FLUID
st
and 2nd family according to EN437.
Gas 1
The gas must be non corrosive, clean and dry.
I max
U
2 A
250 V~
Junction box Aluminum
LABELLING
Figure 2. Electric Pilot Heater Type RPE Label
DIMENSIONS AND WEIGHTS
Heater only : 1,4 kg
Heater + heating element: 4,5 kg
2
Figure 3. Electric Pilot Heater Type RPE Dimensions and Weights
P
A
B
C
2
2
4
Type RPE
INSTALLATION
Figure 4. Type RPE Electric Pilot Heater Installation
Assembly
Electrical pilot heater (with heating element)
The Type RPE is assembled with the vertical thermometer
pocket axe using the xing part supplied with the regulator
actuator bolt.
N
2A 2A
123456789
1
2
3
030
4
5
6
230 V 50-60 Hz
-30
0
30
90
60
10
A1 12
3
A2 34
123456
Figure 5. Assembly on Symmetrical DIN Rail
Electrical Connections
Electrical
Type
RPE box: Packing gland 3/4” NPT for cable
snap-on.
Electrical wiring: Customer (according to Figure 5)
Recommended wiring: U-1000 RVFV, according to
2
NF C32-322, type class 2.5, conductors 1,5 mm
.
Note: the electrical terminals 4 and 6 of the thermostat
(key 2) must be shunted to cut off supply in the case of
rupture of the thermal probe (key 5).
Note: the electrical terminals 2 and 3 of the Type RPE
connector block (key 4) must be shunted so that the heating
elements (key 6) are connected in series.
Note: the thermostat (key 2) and the power relay (key 3)
must be protected by 2A fuses (protection against
short-circuit of the heating elements).
Note: the thermostat (key 2) and the power relay (key 3) are
assembled on a symmetrical DIN rail.
Regulator bottom electrical heater
The Type RPE is assembled on the regulator bottom with 4
xing screws M8 x 20.
The Type RPE can be installed in an explosive risk zone.
The thermostat and power relay must be installed in an
non-explosive risk zone.
Pneumatic Connections
The Type RPE is to be installed between the pilot lter and
the pre-expansion relay.
Inlet/Outlet: 1/4” NPT - tube 8/10 (regardless of the
gas ow).
Figure 6. Type RPE Regulator Bottom Electrical Heater Installation
3
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