6
(-47;-8',)7*367)0)'8%&0)34)6%8-32
Several operational characteristics of the EP160, EP161, EP165, EP166, EP170 and EP174 program-
mer modules are determined by six (6) dipswitches located on the side of the programmer. These
characteristics include purge timing (dipswitches 3, 4, 5) and the option requiring the 3-P running
interlock circuit to be proven open at the start of the operating cycle, and that the D-8 (Purge Inter-
lock) and M-D (low fire start interlock) switches open and close at the appropriate times (dipswitch
6). Dipswitch 2 is inactive. (Refer to later sections in this bulletin describing the EP163 program-
mer).
In programmer models with engineering code 39 and above, for a PPC5000 to recognize a new
cycle, dipswitch 1 now invokes a 3 second delay after the operating switch closes to when the blower
motor, terminal M, becomes powered. On a quick recycle, this will all force terminal M to become
de-energized for 3 seconds.
WARNING: THE INAPPROPRIATE SELECTION OR APPLICATION OF A PROGRAMMER
MODULE COULD RESULT IN AN UNSAFE CONDITION HAZARDOUS TO LIFE AND
PROPERTY. The various programmer modules (EP160, EP260, and EP380) are interchangeable
because they plug into a common chassis. Changing the dipswitches modifies the operation of each
programmer module. Care should be taken to insure the proper dipswitch settings. Selection of the
programmer module and setting the dipswitches for a particular application should be made by a
competent professional, such as a Boiler/Burner technician licensed by a state or other govern-
ment agency, engineering personnel of the burner, boiler, or furnace manufacturer (OEM) or in
performance of duties based on information from the OEM.
(-47;-8',)7-2%'8-:)
(-47;-8',*36')(&03;)61383678%68()0%=
When using a PPC5000 for boiler control operation, for the PPC5000 to recognize the beginning of a
new burner operating cycle, it is necessary to force the blower motor (terminal M) off or non-pow-
ered for a short period of time. Placing dipswitch 1 in the UP position will delay the blower from
starting 3 seconds after the operating control (terminal 13) closes or force the blower motor to de-
energize for 3 seconds in the event of a quick recycle. The function of dipswitch 1 is not made per-
manent after 8 hours of operation.
(-47;-8',)7496+)8-1-2+
Dipswitches 3, 4, & 5 determine the purge timing for the programmer module. Purge timings are
selectable from 30 seconds to 30 minutes. On the EP160, EP161, EP165, EP166, EP170 program-
mer, the purge timing is not initiated until the firing rate motor is driven to the high fire position (10-
X made) and the high fire switch is proven closed (term D-8). At the end of the purge timing, the fir-
ing rate motor is driven to the low fire position (10-12),
and the control waits an additional 30 sec-
ond (minimum) until the low fire start interlock is proven closed (M-D).
Refer to the table on
dipswitch functions to select the various purge timing.
UP
DOWN
PRINTED CIRCUIT BOARD
FRONT COVER
