robatherm RM Series - Page 59

Commissioning and Maintenance
© robatherm 55
Turn down gas pressure gauge max. (10) until it switches off.
Set value: Switch off value + approx. 20 %
Gas pressure gauge min. (9) remains at lowest setting.
Check direction of rotation of servo motor (7). If the room sensor is set above t
ist
, the servo
motor (7) must open the control damper and vice versa.
Test the function of the controls.
Set sensors and thermostats to rated value.
The whole gas piping must be checked carefully for leakages with a leak indicator spray. If
leakages are found, undertake appropriate repair work.
For units with combustion air blower, set combustion air pressure by adjusting suction
restrictor; instructions of burner manufacturer must be followed exactly.
Set air pressure gauge on combustion air blower:
Set value: Switch off value – 20 %
Setting of burner slit: Nominal pressure loss at burner slit should be approx. 180 to 250 Pa.
Set pressure switch on burner slit:
Set value: Nominal pressure drop at burner slit – 40 %
All settings must be documented and filed in the setting records.
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Maintenance
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Maintenance Interval
One shift operation: Min. 1 x per year
Two shift operation: Min. 2 x per year
Three shift operation or other modes of operation: Min. 3 x per year
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Caution
Observe general safety instructions on page 3!
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Caution
Do not enter running unit due to danger of burns.
There is a danger of fire if flammable materials come into contact with the flame.
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Gas Surface Burner – Periodic Maintenance
 Check gas pipes, connections and gas control system for leaks and eliminate any leaks
found.
 All maintenance work must be performed as shown for commissioning.
 Clean off dirt with a brush; ensure that all air holes are clear. Check gas outlets, clean
with injector needle if necessary. Do not touch with ignition electrode or controls.
 Check distance of the ignition electrodes; adjust if necessary.