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3.0 START-UP
3.1 Blower Adjustment
1. Disconnect all fan pressure switch tubings at plenum and connect manometer using a tee.
2. Close all manual firing valves.
3. Turn power on;
4. Check manometers attached to fan pressure switches. The readings should be 1.4 + .2"W.C. for propane and
natural gas. If not, adjust the air shutter on the blowers to attain the correct value.
5. Turn power off.
6. Reconnect all fan pressure switch tubing to original positions.
3.2 Main Burner Adjustment
1. Turn off unit.
2. Open manual firing valves.
3. Turn on the unit, wait 15 seconds, and the igniter should glow. Sight glass to check ignitor at both ends of the boiler.
Gas valves should be open after 45 seconds.
4. If burner does not light on first trial. It will retry, up to 3 times
5. Main burner ignition – check manifold gas pressure at gas valve outlet pressure tap. This should read 3.4 + .1"W.C. for
natural gas and 10.5 + .1” W.C. for propane.
6. If the pressure reading differs by more than + .1"W.C. Remove screw cover off the gas pressure regulator, adjust
main burner manifold pressure. Replace the screw cover of the gas regulator. Repeat step 2 – 5 on other valves as
necessary.
Your Hi-Delta is tuned in!
3.4 Safety Inspection
• Replace main gas manifold adjustment cap.
• Check all thermostats and high limit settings.
• During the following safety checks leave manometers hooked up, check and record.
• If other gas fired equipment are in the room and on same gas main check all pressures on the Hi-Delta with all other
equipment running.
Remember, incoming gas pressure could be lower than 7.0" W.C. for nat. gas and 11.0” W.C. for pro., provided 3.2.4 is met.
• Check thermostats for ON/OFF operation.
• Check Hi Limits for ON/OFF operation.
• While in operation, check flow switch operation
• Check the low gas pressure switches (For proper adjustment, if available, use the attached manometers to set pressure.
The scales on the switch are approximately only ); Low gas pressure switch must be set at 5" W.C. for natural gas and
10.5” W.C. for propane.
• High gas pressure switch (optional) at 1" W.C. above manifold pressure.
• Insert ignition control lockout tests as safety check.
3.5 Follow-Up
• Safety checks must be recorded as performed.
• Turn unit on.
After main burner ignition.
• Check Manometer for proper reading.
• Cycle unit several times and recheck readings
• Reanalyze with unit running record or print results.
• Remove all Manometers and replace hose, remove jumper, replace all gas pressure caps.
• Check for gas leaks one more time.
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