Datasheet Content
7 136
ISO 9001
Burner Controls RMO88.53...
RMG88.62...
RMG/M88.62...
Microcontroller-based burner controls for the supervision of single- or multi-
stage forced draft gas / oil burners in intermittent operation.
Oil throughput above 30 kg / h and a maximum capacity above 120 kW when fir-
ing on gas.
The RMO88.53... / RMG88.62... / RMG/M88.62... and this Data Sheet are intended
for OEMs which integrate the burner controls in their products.
Use, features
Use The burner controls are designed for the startup and supervision of single- or multi-
stage forced draft burners in intermittent operation. The RMO88.53... is for use with
forced draft oil burners, the RMG88.62... / RMG/M88.62... for forced draft gas burners.
When firing on oil, yellow-burning flames are supervised with photoresistive detectors
QRB1B..., and blue-burning flames with blue-flame detectors QRC... When firing on
gas, the flame is supervised with an ionization probe or flame detector QRA... (with
ancillary unit AGQ2...A27).
Firing on oil - Forced draft oil burners to EN 267
- Burner controls for use with atomization oil burners of monoblock design to EN 230
Firing on gas - Forced draft gas burners to EN 676
- Burner controls to EN 298
CC1N7136en
Riello Siemens Building Technologies
11.12.2002 HVAC Products
Application-specific When firing on oil
features - Contact for preheating the oil
- Monitoring of time for preheating the oil
- Limitation of the number of repetitions
When firing on gas
- Monitoring of air pressure with functional check of the air pressure switch during
startup and operation
General
- Undervoltage detection
- Electrical remote reset
- Accurate and reproducible program sequence owing to digital signal handling
- Controlled intermittent operation after 24 hours of continuous operation
- Multicolor display of status and error messages
Warning notes
To avoid injury to persons, damage to property or the environment, the following
warning notes should be observed!
Do not open, interfere with or modify the unit!
· Before performing any wiring changes in the connection area, completely isolate
the burner control from the mains supply (all-polar disconnection)
· Ensure protection against electric shock hazard by providing adequate protection
for the burner control’s terminals
· Check to ensure that wiring is in an orderly state and that the wires are firmly con-
nected
· Press the lockout reset button of the burner control or the reset button extension
AGK20.43 only manually (applying a force of no more than 10 N), without using
any tools or pointed objects
· Fall or shock can adversely affect the safety functions. Such units may not be put
into operation, even if they do not exhibit any damage
Engineering notes
· When used in connection with actuators, there is no position feedback signal from
the actuator to the burner control
· The running times of the actuators must match the burner control’s program. An
additional safety check of the burner control together with the actuators is required
Mounting notes
· Ensure that the relevant national safety regulation are complied with
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Siemens Building Technologies CC1N7136en
HVAC Products Riello 11.12.2002
Installation notes
· Installation work must be carried out by qualified staff
· Observe the permissible lengths of the detector cables (refer to «Technical data»)
· Always run the high-voltage ignition cables separately while observing the greatest
possible distances to the unit and to other cables
· Install switches, fuses, earthing, etc., in compliance with local regulations
· Ensure that the maximum permissible current ratings will not be exceeded (refer to
«Technical data»)
· Do not feed external mains voltage to the control outputs of the unit. When testing
the devices controlled by the burner control (fuel valves, etc.), the burner control
must never be connected
· Phase and neutral conductors may not be interchanged
Electrical connection of ionization probe and flame detector
It is important to achieve practically disturbance- and loss-free signal transmission:
· The cable length must not exceed 1 m
· Never run the detector cable together with other cables
– Line capacitance reduces the magnitude of the flame signal
– Use a separate cable
· Insulation resistance
– Must be a minimum of 50 MW between ionization probe and ground
– Soiled detector holders reduce the insulation resistance, thus supporting creep
age currents
· Earth the burner in compliance with the relevant regulations; earthing the boiler
alone does not suffice
Only when firing on gas · Observe the polarity
With supervision of the ionization current, the burner controls can detect wrong
polarity of live and neutral conductors, in which case they initiate lockout at the end
of «TSA»
· The ionization probe must be protected against electric shock hazard
· Locate the ionization probe such that
– the ignition spark cannot arc over to the ionization probe (risk of electrical
overloads)
– the ignition spark cannot adversely affect supervision of the ionization current
· In networks with nonearthed neutral conductor and ionization current supervision,
terminal 6 must be connected to burner ground
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Siemens Building Technologies CC1N7136en
HVAC Products Riello 11.12.2002
Commissioning notes
· Commissioning work must be carried out by qualified staff
· When commissioning the plant or when doing maintenance work, make the follow-
ing safety checks:
Safety check Anticipated response
a) Burner startup with flame detector darkened or Lockout at the end of «TSA»
with open-circuit to the ionization probe
b) Burner startup with flame detector exposed to Lockout after no more than
extraneous light (only when firing on oil) 25 seconds or immediate lockout
during the prepurge time
c) Burner operation with simulated flame failure; for Firing on oil: Repetition followed
that purpose, darken the flame detector during by lockout at the end of «TSA»
operation and maintain that status or interrupt Firing on gas: immediate lockout
the gas supply after the flame has extinguished
d) Burner startup with response from air pressure Lockout at the end of the waiting
switch (only when firing on gas) time «tw»
e) Burner operation with simulated loss of air pres- Immediate lockout
sure (only when firing on gas)
Standards
Conformity to EEC directives
- Electromagnetic compatibility EMC (immunity) 89 / 336 EEC
- Directive for gas-fired appliances 90 / 396 EEC
- Low-voltage directive 73 / 23 EEC
Service notes
· Maintenance work must be carried out by qualified staff
· Each time a unit has been replaced, check to ensure that wiring is in an orderly
state and that the wires are firmly connected. Make the safety checks as listed in
«Commissioning notes»
Disposal notes
The unit contains electrical and electronic components and may not be disposed of
together with household waste.
Local and currently valid legislation must be observed.
Mechanical design
The housing of the burner controls is made of impact-proof, heat-resistant and flame-
retarding plastic.
The housing accommodates the
- microcontroller which controls the program sequence, and the relays for load con-
trol
- electronic…
