UTICA BOILERS UB90-200 Installation, Operation & Maintenance Manual page 17

Run 14 gauge or heavier copper wire from boiler to
grounded connection in service panel or properly driven
and electrically grounded ground rod.
Installing The Thermostat
Thermostat location has important effect on
operation of your boiler system. BE SURE TO
FOLLOW INSTRUCTIONS INCLUDED WITH YOUR
THERMOSTAT.
Locate thermostat about fi ve feet above fl oor on inside
wall. It may be mounted directly on wall or on vertical
mounted outlet box. It should be sensing average room
temperature.
AVOID THE FOLLOWING
Corners
Dead Spots Alcoves
Behind doors
Concealed pipes or ducts
Stairwells - drafts
Cold Spots
Unheated rooms on the other side
of the wall
Concealed pipes
Fireplaces
TVs or radios
Hot Spots
Lamps
Direct sunlight
Kitchens
ELECTRICAL WIRING
Set heat anticipator at 0.7 amps. Connect 24 volt thermostat
leads to the two (2) yellow wires located in service switch
junction box, located on outer jacket of boiler. See Figure
#13 for service switch junction box and thermostat fi eld
wiring connections.
Connect Circulator Pump Wiring
See Figures #14A & #14B for service switch junction
box and circulator pump fi eld wiring connections. If the
two 120 volt circulator wire terminals inside the junction
box are not used, please leave the two wire nuts to prevent
the short circuit.
Label all wires prior to disconnection when
!
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing.
17
CAUTION