User guide

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3-25
SECTION 3 FTCS-IOM-2013-1114 OPERATION
! WARNING
Do not operate, or allow others
to operate, service or repair this
equipment unless you (they) fully
understand all applicable sections
of this manual and are quali ed to
operate/maintain the equipment.
2. The gauge indicating the pressure of the  uid at the inlet is labeled “Inlet“.
The “Outlet” gauge indicates the pressure at the outlet, and in e ect
indicates the resistance of the external pipework circuit. The pressure
gauge indicating pressure at the inlet of the pump is labeled “Suction.”
 Test of Ignition Safety System Shutoff
Test the ignition system safety shuto as follows:
1. Shut the pilot ball valve.
2. Close the last gas valve between the inlet to the burner and the butter y
valve.
3. With the main gas cock (inlet manual gas valve) open, the burner
should be cycled on. After all the safety limits such as gas pressure and
temperature are satis ed, the blower will run and pre-purge the heater.
4. Once the purge is complete (30 seconds), the ignition transformer will be
energized. There will be a 4 second trial for ignition period. During this
period, indicator lights on the  ame safeguard (pilot and main).
5. With no  ame established, the  ame safeguard will not receive a  ame
signal from the scanner.
6. After 4 seconds, the  ame safeguard programmer will assume a “Flame
Failure” condition and go to a “lockout” mode. Lockout will require manual
reset of the  ame safeguard.
7. After completing this test, open the gas valve.
 Cycle Testing
The heater should be cycled tested and automatically allowed to go through
its normal starting sequence several times to verify that all components are
functioning properly. This will also verify that combustion is set properly so that
heater light o has a smooth transition from ignition to main  ame.
A minimum of 10 cycles should be met without any  ame failures, with
combustion readings comparable to the factory test  re sheet and no interlocks
causing the heater to shutdown.