User Guide

3
Figure 1: Control Locations
Basic Operation
CAUTION
Should overheating occur or the gas supply fail to shut off, do not turn off or disconnect the electrical
supply to the pump. Instead, shut off the gas supply at a location external to the appliance.
En cas de surchauffe ou si I'admission de gaz ne peut étre coupée, ne pas couper ni débrancher
l'alimentation électrique de la pompe. Fermer plutôt le robinet d'admission de gaz à l'extérieur de
I'appareil.
Do not use this boiler if any part has been under water. Immediately call a qualied service technician
to inspect the boiler and to replace any part of the control system and any gas control which has been
under water.
Avoid operating this boiler in an environment where saw dust, loose insulation bers, dry wall dust,
etc. are present. If boiler is operated under these conditions, the burner interior and ports must be
cleaned and inspected daily to insure proper operation.
A. General This boiler is equipped with controls for
proper operation. All controls must be in proper
working order. Contact a qualied service agency
to provide annual maintenance as specied in the
Installation, Operating and Service Instructions.
WARNING
Service on this boiler should be undertaken only
by trained and skilled personnel from a qualied
service agency.
WARNING
Do not reset Block Vent Switch unless a qualied
service agency has determined and corrected
the cause of any blockage in the vent system or
chimney.
1. Limit See Figure 1. A device which automatically
interrupts boiler operation when the water
temperature exceeds the set point. Maximum
allowable boiler water temperature is 220°F. Switch
differential is 15°F.
Original equipment with this boiler is U.S. Boiler
Intelligent Hydronic Control and Limit Rated
Temperature Sensor combination. The Intelligent
Hydronic Control shuts off boiler main burners
when boiler water temperature exceeds pre-
programmed Intelligent Hydronic Control water
temperature set point. Boiler main burners will
re-light automatically, providing the call for heat is
present, when boiler water temperature falls below
pre-programmed control water temperature set point
less the set point differential.
2. Blocked Vent Switch See Figure 1. A device
which automatically interrupts boiler operation
when excessive vent system blockage occurs. If the
control was activated to interrupt boiler operation,