Start-Up And Adjustment - Eclipse RatioMatic 50 User Manual

4.0 Start-Up And Adjustment

Step 1: Initial Settings
NOTE: Use the following set-up procedure when factory settings have been disturbed, or when chamber pres-
sures are outside the range of +1" to -1" w.c. (+2.5 to -2.5 mbars).
Factory Settings
Control Panel Settings
Regulator Settings
WARNING
Gas Valves
Combustion Air Blower
Duct or Circulating Fan
The following parameters are set at the factory: 1) Pilot input, 2) Low and high
fire air flow, and 3) Low fire gas flow. Because of this, the burners should ignite
and burn reasonably well at low fire, but the high fire gas setting will need to be
adjusted as described below under Step 4.
Pilot Adjustment: Some provision should be made to operate only the pilot during
pilot adjustment. See the literature included with the flame monitoring relay and/
or control panel for information on operation with pilot only. Eclipse flame moni-
toring relays have a front panel pilot test button that will hold the start-up sequence
on pilot during pilot adjustment.
High/Low Fire Control: During burner adjustment, you will need to drive the
control motor to high and low fire several times. You may do this with the pro-
cess temperature control, setting it to a higher temperature for high fire or a lower
temperature for low fire; or your equipment may be fitted with a manual override
attached to the control motor. Before attempting to adjust the burner, determine
how you will control the motor position and become familiar with the method.
The main and pilot gas regulators must be adjusted to supply the minimum gas
pressures listed in Figure 1.
Do not operate Ratiomatic burners with less gas inlet pressure than the
minimum listed in Figure 1.
Lower gas inlet pressures may cause the proportionator to remain fully
open as the burner turns down from high fire, causing excess fuel opera-
tion and the possible accumulation of unburned fuel in the chamber. In
extreme cases, this may cause explosions or fires.
Close all manual and automatic gas valves, including the main gas butterfly and
the pilot gas cock.
Start the blower and check the impeller for correct rotation. If it's running back-
wards, have a qualified electrician change the motor wiring.
If the burner is to fire into a duct or chamber with a circulating fan, start the fan to
produce full process air flow past the burner.
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