Midco Economite RE4400DS - Manual (Page 9)

flue gas samples and temperature immediately ahead of the draft control.
A.
The flue gas temperature should be above 325°F but not exceeding 550°F.
Excessive flue gas temperatures will result in low efficiencies. Low flue gas
temperature may cause excessive condensation. Reset gas input, if necessary, to
adjust stack temperature.
B. Make the final setting of the combustion air shutter by checking the flue gases
with an ORSAT or similar combustion testing instrument. The carbon monoxide
content should conform to local codes, or in their absence, to the level specified
in the United States or Canadian Standard referenced on the front cover of this
manual; and the carbon dioxide content should be approximately 9.5% for
NATURAL or 12% for propane , or within the limits prescribed by local codes.
12. Check the draft control to make sure there is no spillage of flue products into the room.
13. FILL OUT THE INSTALLATION ADJUSTMENT DATA TAG and affix to the burner or
gas utilization equipment.
NOTE: For subsequent normal starting and shut off procedure, refer to CONSUMER
INSTRUCTIONS, located in part 3 of this manual,or to the instruction plate mounted
on the burner.
____________________________
DANGER: Do not tamper with the unit or controls. If trouble occurs contact
the installing contractor, service agency, or fuel supplier. See front cover.
DANGER: Be sure that the main Shut-Off Valve is closed and the burner
power supply is turned off before removing any parts for service.
CAUTION: Cover plates, guards, and enclosures must be maintained in
place at all times except during maintenance and service.
____________________________
? The flame sensing rod must be positioned as shown in Figures 7A and 7B so that the
Electronic Control will detect a proper flame.
? Both the spark and flame rods are current carrying conductors and, along with their
connecting wires, must be kept free of contact with conductive metal parts of the burner. Rod
insulators and wire insulators should be clean, dry and free of cracks.
9
Part 2
Service
Part 2 Service
VIII Initial Start-
up /Adjustment
Continued
Figure 7B: General Assembly for the RE4400DSA
Part 1
Installation Continued
IX Electrodes