Patterson-Kelley TBIG-03, Owner'S Manual

Page: 19 / 24

Maintenance
all steps and safety checks are repeated. The mo-
torized gas valves cannot reopen in the absence of
ignition.
11. When the desired water temperature is reached,
the operating control switch opens and the pro-
grammer is de-energized at Terminal 6 and the in-
dicator for "Heat" is turned off. This action also
de-energizes Terminal 9, thus closing both main
gas valves and turning off the indicator for "Main
Gas."
12. When the water temperature is reduced by the
load on the system, the operating control switch
will close again. The operating sequence will re-
cycle to step 5, provided that the limits on water
flow, gas pressure, and high temperature are all
met.
`
8.0 P
ARTS AND
T
ECHNICAL
S
UPPORT
Spare parts and replacement parts can be ordered from
Patterson-Kelley by calling (570) 421-7500. Ask for
the Boiler Department. The fax number is (570) 476-
7247. Refer to the parts list shown on the assembly
drawing provided with this manual.
Technical information is also available at the above
number.
Before calling, please have the model number and se-
rial number of your boiler available.
8.1 W
IRING
D
IAGRAMS
Wiring and control schematic drawings are shown on
the following pages.
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