Shutting Boiler Down For Extended Period; Benchmark 5000/6000 Long Term Blower Storage - Watts AERCO Benchmark BMK750 Operation And Service Manual

Benchmark with Edge [I]: Operation-Maintenance Manual
SECTION 8 – MAINTENANCE

8.11 SHUTTING BOILER DOWN FOR EXTENDED PERIOD

If the boiler is to be taken out of service for an extended period of time (one year or more), the
following instructions must be followed.
Shutting Boiler Down For An Extended Period Instructions
1. Set Enable/Disable switch on the front panel to the Disable position to shut down the boiler's
operating controls.
2. Disconnect AC power from the unit.
3. Close the water supply and return valves to isolate boiler.
4. Close external gas supply valve.
5. Open relief valve to vent water pressure.
6. Open the drain valve and drain all water from the unit.
7. If the temperature in the storage location will ever get below freezing, for even a short
time, you must drain all water from the unit before the temperature falls below freezing.
Step 6 is not sufficient, as it leaves some water in the bottom of the heat exchanger
chamber. You must then use a suction pump inserted through the inspection ports to
remove all water from the bottoms of the heat exchanger chamber and base assembly.
WARNING!
If the temperature will ever fall below freezing, failure to drain all water can cause heat
exchanger tubes to crack and fail.

Benchmark 5000/6000 Long Term Blower Storage

8.11.1
Benchmark 5000 and 6000 blowers can be damaged if they are left in long term storage
(exceeding 30 days after receipt of equipment). If a Benchmark 5000 and 6000 blower is kept in
storage for more than 30 days, you must complete the instructions below.
Benchmark 5000/6000 Long Term Blower Storage Instructions
1. Select a suitable storage site:
•
Level, well-drained, firm surface, in clean, dry and warm location. Minimum temperature
of 50°F (10°C).
•
Isolated from possibility of physical damage from construction vehicles, erection
equipment, etc.
•
Accessible for periodical inspection and maintenance.
The blower should be supported under each corner of its base to allow it to "breath". Supports
2.
(2 x 4's, timbers, or railroad ties) should be placed diagonally under each corner.
If the equipment is to be stored for more than three (3) months, the entire blower assembly
3.
must be loosely covered with plastic, but not tightly wrapped.
Storage Maintenance:
4.
NOTE:
A periodic inspection and maintenance log, by date and action taken, must be developed
and maintained for each blower. See example below. Each item must be checked monthly.
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