P-K MACH
®
Gas Fired Boiler
Technical Service 1.877.728.5351
Revised: January 3, 2020
Released: January 3, 2020
Patterson-Kelley 2020
All Rights Reserved.
1004905981 P-K MACH C1500H-C4000 Installation and
Owners Manual (Rev F Jan-2020).docx
Page 62
6.1.3 Monthly Preventative Maintenance
1.
Press the “Info” button on the NURO
®
touchscreen to load the Information Screen and scroll
down to view the flame signal measured in Volts. Typical flame signals should read between
20-50V. If the flame signal is below 10V, the UV scanner may need to be replaced.
2. Test the low water level cut-off. Refer to
3. Test the manual reset high-temp limit. Refer to
4. Test the low gas pressure switch. Refer to
5. Test operating temperature controls by reducing or increasing temperature settings as
necessary to check burner operation.
6. Check the combustion chamber drain piping for leaks or obstructions.
NOTICE!
Installation and service must be performed by a qualified installer or service agency
that has been trained on the appliance.
6.1.4 Semi-Annually
In addition to the recommended monthly service:
1. Clean burner of any accumulated dust or lint. Refer to Section
2. Inspect burner for any signs of deterioration or corrosion. Replace immediately if deterioration
or corrosion is evident.
3. Check the pH level of the system fluid. Verify the pH is in accordance with
Water Quality Standards Quality Standards for Hydronic Boilers in Multi-Metal Systems
4. Inspect and clean the condensate system and check for leaks. If a condensate neutralization kit
is present, open the lid and inspect the limestone rocks. If they are absent or have been
significantly worn away, replace them with new limestone rocks. Use high-calcium (or pure)
limestone.
6.1.5 Annually
In addition to the recommended monthly and semi-annual service:
1. Inspect and clean the inlet screen of any accumulated dust or lint.
2. Check burner and clean off any soot or foreign material that may have accumulated. Refer to
. Check for corrosion of the burner and its parts. If there is evidence of deterioration
or corrosion, replace immediately. Inspect combustion chamber when the burner is removed for
inspection. Note any signs of deterioration. Clean as necessary.
3. Inspect and clean heat exchanger. Remove the various covers to inspect the flue gas
passageways. Clean the combustion side casting pins by flushing with clean water and blowing
dry with compressed air. Do not use any cleaning agents or solvents. Do not use soap. A soft
nylon brush may be used in accessible areas. Be sure to inspect condensate collection pan
that is the lowest part of the heat exchanger.
4. Replace the ignition electrode and gasket.
5. Drain and flush the water side of the heat exchanger as required (separate from system flush)
using clean water only.
