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MACH® Series
Gas-Fired Boiler Installation
Page 18
3.10 PRE-START CHECK LIST
Before attempting to start the boiler, make sure the
following items have been completed.
1. Section 3.9.1 Inspection.
2. Flue gas from the boiler is properly vented; (refer
to Section 3.6)
3. Gas connection has been made, pressure tested for
leakage, and the line purged of air. Make sure all
required vents have been installed.
4. Water connections are complete, and the boiler
and system have been filled and purged of air.
5. The boiler is connected to a 120 volt power source
with a disconnect having adequate overload
protection.
6. Combustion air openings are not obstructed in any
way and have adequate capacity.
7. The boiler is placed the proper distance from any
combustible walls, in accordance with Section
3.3.3.
8. Relief valves have been piped to floor drains.
9. Condensate piping is properly connected.
10. Verify system fluid pH level is within
specification.
3.11
SAFETY CHECKS
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.
WARNING!
Never attempt to operate a boiler that has failed
to pass all the safety checks described below.
WARNING!
After checking controls by manual adjustment,
make sure they are always reset to their proper
settings.
3.11.1 Test of Ignition Safety System
MACH (C300 & C450)
Test the ignition system safety shutdown as follows:
1. Loosen the retaining screw and remove the 5 pin
connector from one of the two gas safety shut-
off/control valves.
2. Cycle the boiler on by generating a heat request.
(The method for this will depend on your boiler
configuration. See Section 3.12.1.2)
3. The boiler should run through the normal startup
sequence, checking all of the limits and switches
as in a normal start up. (See Sequence of
Operation, Section 5.4)
4. When the boiler reaches the ignition period, a 2
will display as the first digit in the display, the
spark terminal will energize, and one of the gas
safety shut off / control valves will open. One
open gas valve should not provide sufficient fuel
to light the burner.
5. After 3 seconds the combustion control should
lock out, and the display will flash E-02
indicating a flame failure.
After completing this test, turn off the boiler and
reconnect the 5 pin connector to the gas safety shut
off / control valves retightening the retaining screw.
MACH (C750, C900 & C1050)
Test the ignition system safety shutdown as follows:
1. Cycle the boiler on by generating a heat request.
(The method for this will depend on your boiler
configuration. See Section 3.12.1.2)
2. Place the boiler in operation at the high fire
setting. See section 3.12.4 Gas Valve Setup and
Adjustment , Test Mode High