Raypak HI DELTA 992B-2342B Installation & Operating Instructions Manual page 44

Pump Time Delay
There are two versions of the Pump Time Delay. The
first is the Economaster II. It is an electronic device
that allows the operator to set a variable time (3 to 10
minutes) for the pump to run after the boiler shuts off.
See Fig. 40 (A) . The time is factory-set at 7 minutes
and it can be re-adjusted in the field.
The second version is a fully enclosed solid state TDR
with a white jumper that selects one of two time
delays. See Fig. 40 (B). If the jumper is on pins 6 and
7 (default) the delay time is 5 minutes. If the jumper is
not on pins 6 and 7, the time delay is 10 minutes.
In a conventional system, when the Aquastat is satis-
fied, the main gas valve closes, but the pump
continues operating. With either time delay relay the
boiler pump is programmed to continue running for an
optimum period of time in order to absorb the residual
heat from the combustion chamber and use it in the
system. The pump then shuts off until the next call for
heat is received from the Aquastat.
(A)
(B)
Fig. 40: Economaster Time Delay Relays (TDR)
UDB Diagnostic Board
This heater is equipped with a diagnostic board which
will indicate faults as they occur. It has the ability to
retain up to 256 faults in history. Refer to the section
below for instructions on accessing, reviewing and
clearing these faults.
SW2
SW1
Fig. 41: UDB Diagnostic Board
UDB Fault History
To view the fault codes in the UDB history file:
1. Press and hold the switch labeled "SW1" for 5 sec-
onds to access the fault history. LED 17 will begin
to flash when the history has been accessed. See
Fig. 41 above.
2. Press the switch labeled "SW2" to scroll through
the recorded faults in history.
3. When a fault is being displayed, the corresponding
LED will light AND LED 17 will flash at a rate that
corresponds to the fault number.
4. The faults are recorded and displayed on a last in,
first displayed basis. The last fault recorded will be
the first fault displayed. There is no time or date
stamp associated with these faults.
5. Continue to push "SW2" to view subsequent
faults.
6. When the history of faults has been exhausted,
pushing "SW2" again will roll the fault history over
and it will start again.
7. To exit the fault history, press and hold "SW1" for
5 seconds, or wait for 4 minutes and the board will
automatically exit the history mode (fault LEDs will
go out).
NOTE: To clear the fault history, press and hold
both "SW1" and "SW2" for 5 seconds. Once cleared,
the history cannot be recovered.
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