Utica Boilers UB95M-200 Installationsanweisungen

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Boiler Control Design
• Integrated modulating boiler control is designed for 
central heating (CH) hot water boilers with modulating 
fan and gas-air control. 
• Modulation is based upon data relayed to control by 
temperature sensors. 
• Burner uses direct spark igniter (DSI).
• Modulating boiler control is intended for use in 
combination with user interface display unit for both 
information and operation. 
• Control is designed for installation with conventional on/
off dry contact room thermostat. 
• Control is able to provide hot water and outdoor reset 
functions.
Main Controller Functions
Central Heat (CH): Control uses sensors on supply water, 
return water and outside air to determine heat load of 
heating system. Results in boiler supplying just enough 
heat to satisfy demand which results in fewer overshoots 
and less short cycling than conventional boiler.
Domestic Hot Water (DHW): When used in conjunction 
with indirect hot water heater boiler has capability to 
provide domestic hot water.  An on/off dry contact aquastat 
is used to activate call for domestic hot water. 
Outdoor Reset: Control senses outside air temperature 
using factory supplied, field installed sensor. Controller 
detects presence of sensor and reacts according to 
parameters programmed into controller.
User Interface Display
User interface display allows installer and home owner to 
scroll through control settings and customize boiler to heat 
delivery system used in installation location. See “User 
Interface Quick Reference” Section 10, page 21 for more 
information on using and programming boiler control.
4 - MODULATING CONTROL FEATURES
IMPORTANT:
This boiler is equipped with a feature that saves energy 
by reducing the boiler water temperature as the heating 
load decreases.  This feature is equipped with an override 
which is provided primarily to permit the use of an external 
energy management system that serves the same function. 
This Override Must Not Be Used Unless At Least One Of The 
Following Conditions Is True:
• An external energy management system is installed 
that reduces the boiler water temperature as the 
heating load decreases.
• This boiler is not used for any space heating.
• This boiler is part of a modular or multiple boiler 
system having a total input of 300,000 BTU/hr or 
greater.