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7. 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.
8. Examine the venting system. Refer to the vent manufacturer's instructions for requirements in
addition to those listed below.
a. Check all joints and pipe connections for tightness.
b. Check pipe for corrosion or deterioration. If any piping needs replacing, do so
immediately.
c. Inspect and clean any screens in the vent terminal.
9. Qualified service personnel should thoroughly inspect the heating system and correct any
problems prior to re-starting the boiler.
10. Perform combustion analysis and readjust as necessary according to the Combustion Setup and
Adjustment combustion settings table (refer to Sections
11. NOTE: It is recommended that a copy of this report is filed for future reference.
12. Perform a leak test of the gas valves in accordance with the manufacturer's instructions.
6.2 Cleaning the Burner & Combustion Chamber
Patterson-Kelley recommends cleaning the burner and combustion chamber once annually:
6.2.1 MACH CM300-CM399-CM500
Spare parts and replacement parts can be ordered from Patterson-Kelley by calling toll free (877)
728-5351. Reach us by fax at (570) 476-7247.
Boiler
MACH CM300
MACH CM399 and CM500
1. Lockout/tagout gas supply to the boiler.
2. Lockout/tagout electrical power to the boiler.
3. Disconnect the condensate neutralization tank piping in order to install a temporary drain hose
into the condensate trap/drain. Run the open end of this hose to a nearby floor drain.
4. Use a flat-head screwdriver to remove the top panel and open the front door of the boiler.
5. Protect the electrical and control components from exposure to water with towels, a nylon tarp,
or plastic wrap.
6. Locate the blower and burner assembly bolted to the cast Aluminum heat engine. Refer to
Section
7.3.1
and Section
7. Disconnect the wire plug/lead to the high gas pressure switch (closest to the blower).
8. Disconnect the two wire plugs/leads to the blower.
9. Use an M5 Allen
control valve (closest to the blower).
Revised: January 3, 2020
Released: January 3, 2020
Required Replacement Parts
Part
Burner Gasket
Burner Gasket
7.3.4
for an illustration of these components.
®
wrench to remove the four cap screws connecting the flange to the gas
Patterson-Kelley 2020
All Rights Reserved.
Technical Service 1.877.728.5351
3.11.2
& 3.11.3).
NOTE
Part Number
26-5000-0035
26-5000-0036
1004905980 P-K MACH CM300-CM500&C750-C1050
Installation and Owners Manual (Rev F Jan-2020).docx
®
P-K MACH
Gas Fired Boiler
Page 62
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