Step 3 Open Front
Completely remove cover nuts,
washers and jacket screws at back,
sides and top.
With hands at top and bottom, pull
cover
and
insulation board straight
back as a single unit.
2.
Step 8 Zone controls
Open/Close zone valves or operate zone circulators several
times to see that they move freely.
Step 9 Plate Heat Exchanger Maintenance
1.
Close the isolating ball valve located on the bypass circ flange, connect a drain hose to the hydronic bypass
y-strainer, open flush valve, and flush into a bucket to remove debris. Close flush valve, remove drain hose, open
isolating ball valve on bypass circ flange, and confirm boiler pressure is adequate, adding makeup water if
necessary.
3. Open a fixture and wait until hot water is continuously flowing. Turn the mixing valve up and down in temperature
to ensure that it moves freely. Set the mixing valve temperature feeding the domestic hot water fixtures to the
desired temperature of approximately 120
°
F using mixing valve.
Note: If the domestic water supply is “hard” with high mineral or lime content, clean and flush when necessary.
Symptoms include poor hot water quality or low domestic hot water flow. See Hot Water Maintenance for
mineral cleaning and flushing instructions. Consider installing Scale Stopper (EK P/N: 10-0650) or water
softener in hard water conditions so recurring plate heat exchanger cleaning will no longer be necessary in most
circumstances.
Step 7 Check Burner
6. Check end cone through air tube opening with drawer assembly removed.
7. Check Fan/Air Inlet for dirt or lint.
8. Install drawer assembly and check ignitor.
9.
Check Filter condition. Replace annually and if vacuum exceeds 7” for
single pipe systems.
10.
Check flexible oil line for leaks or corrosion. Gently bend hose along its
length to check for hardening. Replace immediately if any of these
conditions are present.
Step 6 Remove Drawer Assembly
5. Check Electrode Setting.
6. Check Porcelain Condition.
7. Check Nozzle for coking/heat.
8. Replace nozzle if necessary.
See installation manual for nozzle selection.
Note: All burners require “Amulet” retention head protector.
Bypass Y-Strainer Flush Valve
1
1
1
Shown with optional clean
in place valves
