Utica Boilers UB90-200 Installationsanweisungen

Inspect Venting & Air Intake System -  Operate boiler. 

Verify all vent/air intake connections are gas-tight and 

water-tight. Repair any leaks immediately.

Inspect Condensate Drain -  Verify all connections are 

watertight, and condensate flows freely. Repair any leaks 

immediately.

Inspect System Piping - Verify all connections are 

watertight. Repair any leaks immediately.

Test Ignition System Safety Shutoff 

Turn off manual gas shut off valve.

Set thermostat to call for heat.

Boiler begins normal sequence of operation.

After approximately 30 seconds (pre-purge and igniter 

warm-up period), lamp D illuminates, indicating gas 

valve is powered.

After 4 seconds, gas valve closes, lamp D goes out as 

integrated boiler control senses flame is not present.

To restart system, follow operating instructions. See 

“Startup” on page 29.

• At initial start up, with Economy Feature activated, 

control establishes 145°F target temperature.

• While burner is operating, adjust setting on high limit 

control below actual boiler water temperature. 

• Burner should go off while circulator continues to 

operate. 

• Raise limit setting above boiler water temperature and 

burner should re-ignite after pre-purge and igniter 

warm-up period. 

• Set high limit control to design temperature 

requirements of system. 

• Maximum high limit setting is 190°F. 
• Minimum high limit setting is 100°F. 
• After testing, restore Economy setting.  If heating 

demand is high, target will increase over time to satisfy 

heat load.

• See Manufacturer provided literature for specific 

features of high limit control.

Test Other Safety Controls
If boiler is equipped with low water cut off, manual reset 

high limit, or additional safety controls, test for operation 

as outlined by control manufacturer.  
Burner should be operating and should go off when controls 

are tested. 
When safety controls are restored, burner should re-ignite.

• Set heat anticipator at 0.7 amps for single thermostat 

connected to yellow thermostat lead wires in furnished 

field wiring junction box. 

• For other wiring configurations, refer to instructions 

provided by thermostat manufacturer regarding 

adjustment of heat anticipator. 

• Cycle boiler with thermostat. 
• Raise thermostat to highest setting.
• Verify boiler goes through normal start up cycle. 
• Lower thermostat to lowest setting and verify boiler 

shuts off.

Measure Natural Gas Input Rate
Correct input rate is essential for proper and efficient 

operation of burner and boiler.

Determine elevation at installation site.

See “Boiler Ratings & Capacities” on page 4. to 

determine correct approximate input rate for local 

elevation.

Obtain yearly average heating value of local gas utility. 

At sea level elevation, approximately 1000 BTU per 

standard cubic foot.

Operate boiler for 5 minutes.

Turn off all other gas appliances, extinguishing standing 

pilots where applicable.

At gas meter, measure time in seconds required to use 

one cubic foot of gas.

Calculate “input rate”.  Refer to following formula:

Measured input rate should be within +0/-2% of 

input rating found in step 2. See “Adjustments And 

Checkout” on page 36.