Harsco Industrial P-K THERMIFIC N700, Инструкция по установке и эксплуатации

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P-K THERMIFIC
®
Gas-Fired Boiler
34
7. Combustion air openings are not obstructed in any way and have adequate capacity (refer to
Section 3.5).
8. The boiler is placed the proper distance from any combustible walls or substances (refer to
Section 3.3).
9. Relief valves have been piped to an acceptable drain (refer to Section 3.7).
3.9 S
AFETY
C
HECKS
The following checks of safety systems must be made before putting the boiler into normal operation.
Before firing the boiler refer to Sections 4.1 and 4.2 for information on the use of the controls, lighting,
and shut-down procedures.
Never attempt to operate a boiler that has failed to pass all the safety checks
described below.
After checking controls by manual adjustment, make sure they are always
reset to their proper settings.
NOTICE! If the expected fault does not occur, call for qualified service.
3.9.1 Test of Ignition Safety System
Test the ignition system safety shutoff as follows:
1. Close the gas cock that is downstream from the two safety shut off valves (in the vertical line).
2. With the main gas cock (manual gas valve) open and the pilot gas cock open, the burner should be
cycled on. When air flow is established and all the safety limits on gas pressure, water flow and
temperature are satisfied, the blower will run and pre-purge the boiler.
3. When the pre-purge is complete, the ignition transformer and pilot will operate.
4. If a satisfactory pilot is established the pilot will remain on, alone, for 10 seconds.
5. After 10 seconds, the "Main" light (on flame safeguard) will go on. However, gas cannot flow to the
burner with the gas cock closed (Step 1). The "Pilot" (on flame safeguard) will remain on, along with
the "Main", for another 10 seconds and then go out. Since the main flame cannot be burning at this
point, there will be no flame signal and the flame safeguard programmer will “lockout". The boiler will
lockout on high gas pressure or main flame failure and display a red light. Either lockout will require
a manual reset.
After completing this test, turn off the boiler and open the gas cock that was closed in Step 1.
3.9.2 Test of Low Water Cut-off (Flow Switch)
Test the low water cut-off flow switch as follows:
Operation of the switch can be checked by first turning the boiler off and then turning the boiler pump off,
stopping water flow in the boiler. After turning off the pump, turn the boiler back on. It should not