Filter
Top Products
BOILER FEED SYSTEM
DATE: 4/3/03
REP:2/1/99
3
1.4.5 OVERFLOW CONNECTION
The overflow connection should be piped to an approved drain for gravity flow of any water that
may reach that level in the tank. The purpose of the overflow connection is to keep the tank from
being flooded in case a high level condition occurs in the unit. If a feed system is used in proper
operation, the overflow should not need a trap or any valve for proper discharge of the water into
an atmospheric drain.
1.4.6-A PUMP CONNECTIONS
HFS/HTS:
The pump(s) suction piping should already be installed on the feed system from the factory. This
would include a gate valve and strainer for each pump and unions installed in order to remove or
replace the pump if necessary. Pump bypass connections are also located on the bottom of the
tank. These connections are used (when necessary) in conjunction with the pump discharge in
order to bypass flow back to the tank when the pump GPM flow exceeds the flow required by the
boiler. These connections are typically used to help keep the flow rate on the operating curve of
the pump and to help introduce water into the boiler at a more reasonable rate. However, these
connections may not be necessary depending on the system design. A stop valve and check
valve should always be installed as close to the boiler inlet as possible.
CFS:
The pump is a tank mounted pump mounted directly on the top of the tank. The pump wetted
parts are submerged in the tank with suction no less than 2” from the bottom of the tank. The
pump suction has a screen to protect the pump from debris. This screen will need cleaned
periodically for proper pump operation. A throttling valve may be required in the pump discharge
piping to keep the pump on its operating curve. A stop and check valve should always be
installed as close to the boiler inlet as possible.
1.4.7 ELECTRICAL CONNECTIONS
All electrical connections must conform to the NEC and to all other applicable State and Local
Codes. Wiring to the main power terminals in the control panel (if supplied) by the contractor
must have current carrying capacity equal to at least 125% of the amperage rating of the boiler
feed system. Pump motors supplied are multi-tapped motors and the wiring in the motors should
be checked to make sure it matches the voltage being supplied. If wiring was done at the factory,
the wiring diagram will be supplied with the boiler feed system. The power supply voltage must
be as shown on the wiring diagram enclosed.
Caution:
All control panels and controls are subject to some internal heat. Adequate boiler room ventilation
must be provided.
1.5 BOILER FEED SYSTEM ACCESSORY EQUIPMENT
1.5.1 GENERAL
The boiler feed system equipment list supplied with this manual lists the components supplied
with the unit. Detailed information can be found in the manufacturers literature supplied. A
description of the major components follows: