Crown Boiler KSB Series, Руководство по установке

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2) 24V Thermostat Wiring - Follow thermostat manufacturer instructions. To insure proper thermostat operation, avoid
installation in areas of poor air circulation, hot spots (near any heat source or in direct sunlight), or cold spots (outside
walls, walls adjacent to unheated areas, locations subject to drafts). Provide Class II circuit between thermostat and
boiler. To make the thermostat connections at the boiler do the following (also see Figure 11.1):
Beckett Burners - Remove the factory installed jumper across TR and TW on the burner primary control and connect the
thermostat to these terminals,
Carlin Burners - Remove the factory installed jumper across T and T on the burner primary control and connect the ther -
mostat to these terminals,
Riello - Install the Riello low voltage relay kit (Crown PN 130080) on the burner, following the instructions provided
with the kit. Connect the thermostat across thermostat connections on the AL1008 relay board.
CAUTION
Failure to remove the factory installed jumper across the thermostat terminals on the
burner primary will result in a continuous heating demand, resulting in excessive space
heat and fuel consumption.
3) Optional Tankless Heater Wiring - Install the L4006A with the 3/4 NPT well in the 3/4 tapping in the center of the coil
plate. Make sure that the sensing bulb of this control is fully bottomed out in the well. Route the wire harness from this
control to the thermostat terminals on the burner primary control so that they are in parallel with the space heating ther -
mostat.
Indirect Water Heater Wiring
Figure 11.2 shows field wiring for an indirect water heater. A Honeywell R845A or equivalent DPST relay and transformer
is required. The high limit described in Part VIII must also be supplied by the installer. A call for heat from the indirect water
heater thermostat will energize the relay making both sets of contacts. One set of these contacts then energizes the circulator.
The other set of contacts will close the thermostat connections on the burner primary control, firing the burner. If the boiler
water temperature exceeds the high limit setting of 180F, the high limit will open the thermostat circuit and the burner will
shut down.
If there is a call for space heat, the heating thermostat will close the thermostat connections on the burner primary control
circuit and the boiler will fire without regard to the status of the indirect water heater. The low water cut-off and pressure
limit control will interrupt 120 volt power to the burner in the event of a low water or excessive pressure condition.