4
SPECIAL NOTES ON OPERATION
After any recycle (L1-13) or running interlock (3-P) limit opens, the control will display a POST
PURGE message for 15 seconds before displaying the appropriate message.
On recycle type programmers (e.g. EP260, EP270 or EP380, EP390 set for recycle operation), if a
running interlock (3-P) limit opens, the control will shutdown, and then try to restart. The control
will hold for ten (10) minutes during purge waiting for the limit to close. If a second running inter-
lock opens during this “hold” period, the message may change to reflect the new interlock.
If auxiliary limit #1, #2 or #3 opens during a firing cycle, the control will initiate a 15 second post
purge and then go to a standby message. The FLAME-MONITOR will wait for the L1-13 circuit to
close to begin a new cycle.
If multiple interlocks in the 3-P circuit are opened within the first 10 seconds of purge, the first inter-
lock in the following sequence will be displayed:
Table 2: E300 MESSAGES (E110 Interlock System)
Important: If a particular interlock is not used in your system, a jumper must be installed on the ter-
minals of the Expansion-Module wiring base which corresponds to that interlock message. For
example: If your system has no high temperature switch and no need for auxiliary limits 5 and 6, a
jumper should be placed between terminals 31 and 32, 33 and 34, 34 and 35.
Important: When a single fuel burner is used, the fuel selector switch is not necessary. However, the
appropriate terminals to determine fuel type should be jumpered. For gas only: terminals 24 and 25.
For oil only: Terminals 24 and 26.
When the fuel selector switch is on the GAS position, the 3 oil interlocks are ignored by the
FLAME-MONITOR control. When the switch is in the OIL position, the 2 gas interlocks are
ignored.
CAUTION: E300 wiring should not interfere with the safety function of the operation inter-
lock. Check each interlock for proper operation after wiring the E300.
OIL MODE GAS MODE
Terminal
Message
Terminal
Message
Recycling Limits
20 20
21
L1-13 Aux #1 Open
21
L1-13 Aux #1 Open
22
L1-13 Aux #2 Open
22
L1-13 Aux #2 Open
13
L1-13 Aux #3 Open
13
L1-13 Aux #3 Open
Non-Recycling Limits
23
High Water
23
High Water
24
Low Water
24
Low Water
26
No Fuel Selected
25
No Fuel Selected
28
Low Oil Pressure
27
High Gas Pressure
29
Low Oil Temperature
30
Low Atomizing Media
30
Low Gas Pressure
31
High Pressure
31
High Pressure
32
High Temperature
32
High Temperature
33
Auxiliary Limit #4
33
Auxiliary Limit #4
34
Auxiliary Limit #5
34
Auxiliary Limit #5
35
Auxiliary Limit #6
35
Auxiliary Limit #6
P
Air Flow
P
Air Flow
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