Part 1 installation – Midco Economite RE4400DS User Manual
Page 8
4.
RESET the Electronic Control by setting the operating control to OFF or the thermostat
below room temperature for at least 30 seconds. See Section XII.
5.
Confirm that Main Manual Shut-Off Valves are open. Turn main Manual Gas Cock ON.
6.
Turn operating control to ON or set thermostat above room temperature. Main flame
should come on after the 30 second pre purge period. Whenever the burner fails to light
during the 6-second ignition trial, or if the flame is lost during the burner run and is not
re-established within 36 seconds, the Electronic Control will shut off the Combination
Valve and LOCK OUT. To RESET the Electronic Control for restart, de-energize the
Electronic Control by setting the operating control to OFF or thermostat below room
temperature for at least 30 seconds. If burner still fails to light, turn it off and repeat from
step 5 above. Then, if necessary, refer to the TROUBLE CHART to isolate the problem.
WARNING: Repeated unsuccessful attempts to light will result in accumulated
gases in gas utilization equipment and chimney. To prevent these gases from
reaching an explosive level, periodically purge the gas utilization equipment and
chimney as described in step 3 above.
7.
To make a preliminary setting of the burner input, determine the manifold gas pressure
required from Table 3 and adjust the Main Gas Pressure Regulator accordingly. See
Section XI.
8.
To determine the firing rate for NATURAL gas, accurately time test dial for the number
of seconds for one revolution and use the following formula. All other gas utilization
equipment must be off.
3600 x test dial size x BTU value
= BTU/Hr.
No. of seconds for one rev. test dial
Then divide by 1,000 for MBH value.
Example:
3600 x 1 x 1000
= 360,000 BTU/HR = 360 MBH
10
9.
Check the operation of the burner; start and stop it several times with the thermostat
or operating control.
10. With the burner running, check the operation of all limit and associated controls.
11. Perform the following final adjustments for combustion and flue gas temperature. Take the
8
Part 1
Installation Continued
Part 1 Installation
Figure 7A: General Assembly for the RE4400DS
VIII
Initial Start-
up /Adjustment
Continued