57
1. Determine freeze protection fluid quantity using total system water content following fluid
manufacturer’s instructions. Remember to include expansion tank water content.
2. Local codes may require back flow preventer or actual disconnect from the city water supply.
3. When using freeze protection fluid with automatic fill, install a water meter to monitor water makeup.
Freeze protection fluid may leak before the water begins to leak, causing concentration to drop, reducing
the freeze protection level.
C. FILL AND TEST WATER SYSTEM
1. Fill system only after ensuring the water meets the requirements of this manual.
2. Close manual and automatic air vents and boiler drain valve.
3. Fill to correct system pressure. Correct pressure will vary with each application.
a. Typical cold water fill pressure for a residential system is 12 PSI.
b. Pressure will rise when boiler is turned on and system water temperature increases. Operating
pressure must never exceed 160psig.
4. At initial fill and during boiler startup and testing, check system thoroughly for any leaks. Repair all
leaks before proceeding.
Eliminate all system leaks. Continual fresh make-up water will reduce boiler life. Minerals can build up in
the heat exchanger, reducing heat transfer, overheating heat exchanger, and causing heat exchanger
failure. Such failure IS NOT covered by warranty.
5. The system may have residual substances that could affect water chemistry. After the system has been
filled and leak tested, verify that water pH and chlorine concentrations are acceptable by sample testing.
It is important to purge the system of air to avoid damage to the boiler.
D. PURGE AIR FROM WATER SYSTEM
1. Purge air from system:
a. Connect a hose to the purge valve and route hose to an area where water can drain and be
seen.
b. Close the boiler or system isolation valve between the purge valve and fill connection to the
system.
c. Close zone isolation valves.
d. Open quick-fill valve on cold water makeup line.
e. Open purge valve.
f. One zone at a time, open the isolation valves. Allow water to run through the zone, pushing out
the air. Run until no noticeable air flow is present. Close the zone isolation valves and proceed
with the next zone. Follow this procedure until all zones are purged.
g. Close the quick-fill water valve and purge valve and remove the hose. Open all isolation
valves. Watch the system pressure rise to correct cold-fill pressure. It is recommended that you
put the pumps into manual operation to assist in purging the circuits.
h. Disconnect the wires that are connected to the THERMOSTAT terminals of the customer
connection board. Apply power to the boiler. The display will show the temperature of the water in
the boiler. Press the
{S1}
and
{S3}
keys simultaneously and hold for 1 second. The display will
Содержание Mod Con 300 HL
Страница 13: ...13 Figure 2 ...
Страница 31: ...31 Figure 13 ...
Страница 37: ...37 J SIDEWALL VENTING DIAGRAMS Figure 16 Sidewall Venting with Tee and Coupling ...
Страница 38: ...38 Figure 17 Sidewall Venting Diagrams ...
Страница 39: ...39 K VERTICAL VENTING DIAGRAMS Figure 18 Two Pipe Roof Venting with Tee and Coupling ...
Страница 40: ...40 Figure 19 Roof and Sidewall Venting with Stainless Steel ...
Страница 44: ...44 E GAS VALVE Figure 21 ...
Страница 45: ...45 Figure 22 ...
Страница 55: ...55 Figure 28 Mod Con Internal Connection Diagram ...
Страница 73: ...73 Figure 32 ...
Страница 74: ...74 Figure 33 ...
Страница 75: ...75 Figure 34 ...
Страница 76: ...76 Figure 35 ...
Страница 77: ...77 Figure 36 ...
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Страница 82: ...82 MAINTENANCE NOTES ...
