OPERATION
IMPORTANT
IT IS RECOMMENDED THAT A QUALIFIED SERVICE TECHNICIAN PERFORM THE INITIAL FIRING OF THE BOILER. AT THIS TIME THE USER SHOULD NOT HESITATE TO ASK THE TECHNICIAN ANY QUESTIONS WHICH THEY MAY HAVE IN REGARD TO THE OPERATION AND MAINTENANCE OF THE BOILER.
BEFORE FILLING THE SYSTEM FOR OPERATION the hot water system should be internally cleaned and flushed to remove any contaminants which may have accumulated during installation. See section of this manual titled SYSTEM CLEANING.
General
Never operate the heating elements without being certain the boiler is filled with water and a pressure relief valve is installed in the relief valve opening provided.
LWCO
An electronic type low water cutoff is provided on all boilers as standard equipment. The water probe is installed near the top of the tank to monitor the presence of water. The control circuit is opened if the water level is below this point.
Power On/Off
The pilot switch on the cabinet front permits the boiler to be turned on and off without having to operate the electrical disconnect switch. Additional switches may be provided for manually operating contactor coils.
Relief Valve
An ASME rated pressure relief valve is furnished with the boiler. A fitting for the relief valve is provided in the top of the boiler. A drain line from the relief valve should terminate near a suitable drain. Do not thread, plug, or cap the end of the drain line.
Filling the Boiler
Refer to SYSTEM CLEANING section for preparing the system prior to final filling and operation.
Hard Water: in areas which have hard water it may be desirable to fill the system with soft water and/or provide water treatment as recommended by a consultant familiar with local conditions. In this way harmful water scale
1.Close the boiler drain valve and system valves as necessary.
2.Open a vent in the highest point of the system to allow the air to escape.
3.Fully open the
4.Close the vent as water starts to flow from the opening. Place the
The pressure setting of the relief valve should not exceed the pressure | placed in operation for the first time. |
capacity of any component in the system including the boiler. | INITIAL START UP |
|
HIGH TEMPERATURE LIMITS
Automatic High Limit
The boiler control circuit contains two high temperature cutoff switches. This device shuts off the heating elements if excessive water temperatures are reached. The high temperature cutoff has an adjustable range of 100° to 240°F and automatically resets on a drop of temperature.
Manual High Limit (Optional)
A manual reset high limit may be in the control circuit in addition to the automatic high limit previously described. The control has an adjustable range of 110°F to 290°F and activates and locks on a temperature increase. When the temperature declines the manual reset high limit can be reset. A manual reset high limit is an optional substitution for one of the automatic high limits mentioned above.
The manual reset button is located on the high limit switch which is located in the control panel.
The following checks should be made by the installer when the boiler is placed into operation for the first time:
1.Check all factory and field made water and electrical connections for tightness.
•Repair water leaks and tighten electrical connections as necessary.
2.Turn on the electrical disconnect switch and pilot switch(es) mounted on the boiler cabinet.
3.Observe the operation of the boiler during the first heating cycle.
•Temperature control and contactor operation should be checked by allowing the boiler to come up to temperature and shutoff automatically.
TEMPERATURE REGULATION
Always turn off the electricity at the electrical disconnect switch when making a temperature control adjustment.
It is suggested the temperature adjustment be turned to the lowest setting which satisfies the hot water requirements of the system.
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