Operating instructions

F. Aquastat Relay Control (Provided)
The water temperature limit control in aquastat relay is adjustable and may be set as necessary. It may be set as low as 140°F or as high as 240°F.
This depends on type and amount of radiation involved and weather conditions.
G. Automatic Fill Valve (Not Provided)
For safe, efficient operation, a hot water system must be filled with water. Adding new water when needed can be done manually (by use of a
hand valve in water supply line). This requires regular attention to system’s needs. An automatic fill valve accomplishes this without attention.
It is installed in supply line on hot water boilers only. The valve operates through water pressure differentials. It does not require electrical
connection.
H. Drain Valve (Provided)
This manual valve provides a means of draining all water from boiler and system. It is installed in a tee where return line enters boiler.
I. Circulating Pump (Provided)
Every forced hot water system requires a circulating pump. A separate pump or zone valve is required for each zone if there are 2 or more zones.
The circulator must have the capacity to provide the circulation required by the heating system. The circulator should be connected to the supply
main and must be wired into the boiler’s electrical system. See the prior pages of installation section for piping configurations with the circulator
located on the supply main piping using zone circulators or zone valves. When the piping is arranged with zone circulators and no bypass piping,
the circulator provided with the boiler may be used as a zone circulator. Both piping arrangements allow the circulator to pump away from the
expansion tank and show how the piping should be arranged to allow the heating system to be easily purged of air.
J. Oil Solenoid Valve
The Beckett oil burners have a delay solenoid valve which provides the same shutdown action as the standard solenoid valve, plus on burner start
up the delay solenoid valve remains closed for an additional 15 seconds. This allows the burner fan motor to pre-purge the combustion chamber
and the oil pump to bring the supply oil pressure up to its set point helping to provide a clean light off. The solenoid is incorporated.
PROCEDURE 8—FILLING BOILER
A. How a Hot Water System Operates
The entire heating system (boiler, piping, and radiation units) is filled with water. As water in boiler is heated, it is pumped from top of boiler
through supply main to radiation units. The cooler water in them flows back through return main to boiler. This provides positive and rapid
response to thermostat.
B. Filling System With Water
OPTION #1
a. Close the main shutoff valve, isolation valves, and zone valves (if applicable). If bypass piping is installed, also close the two throttling
valves. Leave the boiler service shutoff valve (if installed) and the balancing valves to each heating zone fully open.
b. Open the following valves in order: the drain valve for power purging, isolating valves before and after the boiler circulator (if
applicable), both throttling valves (if applicable), and then open the fill line shutoff valve. Water will fill the bypass piping and push air
through the piping and out the power purging drain valve. When the power purging drain valve runs air free, close the bypass throttling
valve (leaving the throttling valve to the supply piping fully open).
c. Next, open the isolation valve (or zone valve) to the first zone. Water will fill the piping and push any air out the power purging drain
valve. When the power purging drain valve runs air free, close the isolation valve or zone valve. Repeat this procedure for the remaining
heating zones.
d. Once all of the zones are filled with water and purged of air, close the power purging drain valve and fill line shut off valve, open the
main shutoff valve, and adjust the throttling valves and balancing valves as required.
OPTION #2
1. Close air vents on all radiation units. Open valves to these units.
2. Make sure boiler and expansion tank drain cocks are closed. The air bleed screw on tank drain fitting should be closed.
3. Open valve in line from boiler to expansion tank.
4. Open water inlet to boiler and leave it open.
5. Start with the LOWEST radiation unit. Open the air vent on this radiation unit. When all air has escaped and water starts to flow from vent,
close air vent.
6. Proceed to next lowest radiation unit and repeat process outlined in item 5. Repeat until every radiation unit in system has been covered.
End with the highest unit in system.
If units have automatic vents, this manual venting is unnecessary but will speed up proper filling of system.
If system is a closed expansion tank system, there should be an automatic fill valve. It may be left open to refill system automatically as needed.
Check temperature-pressure gage. Note position of hand indicating pressure. This should be between 10 and 15 psi. Any lowering of this movable
hand below 10 psi indicates loss of water due to leakage. The automatic fill valve should compensate for this. If it does not, manually open this
valve to refill system until hand is again pointing to same pressure reading. Instructions are packaged with valve.
OPERATING BOILER
CAUTION: Do not tamper with the unit or controls.
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