Electrical Wiring - UTICA BOILERS UB95M-200 Installation Manual

ImPORTAnT: Wiring diagrams for the Gas-Fired Direct Vent Modulating Hot Water Boiler can be
found in Section XIV of this manual.
for your safety, turn off electrical power
supply at service panel before making any
electrical connections to avoid possible
electric shock hazard. failure to do so can
cause severe personal injury or death.
ImPORTAnT: Wiring must be N.E.C. Class
1. If original boiler wiring must be replaced,
use only type 105°C wire or equivalent. Boiler
must be electrically grounded as required by
National Electrical Code ANSI/NFPA 70 - latest
edition.
Installations must comply with National Electrical
Code, any other national, state, provincial, or lo-
cal codes or regulations, and, in Canada, with CSA
C22.1 Canadian Electrical Code (Part 1) and any
local codes. (L1, L2)
Line voltage Connections
Connect 120 VAC power wiring to line voltage termi-
1.
nal strip on boiler control panel.
Provide and install a fused disconnect or service
2.
switch (15 amp recommended) as required by code.
Boiler circulator is shipped loose. Wire boiler circu-
3.
lator as shown in wire diagram label on boiler side
panel. (CH L1, CH L2) CH = Control Heat
When connecting a DHW circulator, connect wiring
4.
to line voltage terminal strip on boiler control panel.
(DHW L1, DHW L2) DHW = Domestic Hot Water
Route all wires and conduits to the openings in the
5.
right jacket panel.
X - ELECTRICAL wIRInG
WARNING
!
Codes
Low voltage Connections
Connect low voltage wiring to low voltage terminal
1.
strip as shown in the boiler wiring diagram.
Route all low voltage wires through opening on the
2.
right jacket panel. Use shielded cable.
Connect room thermostat or end switch (isolated con-
1.
tact only) between terminals T1 and T2.
Install thermostat on inside wall away from influences
2.
of drafts, hot or cold water pipes, lighting fixtures, tele-
visions, sunrays, or fireplaces.
3. Thermostat anticipator (if applicable):
If connected directly to boiler, set for 0.1 amps.
A.
If connected to relays or other devices, set to match
B.
total electrical power requirements of connected
devices. See device manufacturers' specifications
and thermostat instructions for details.
Outdoor Temperature Sensor
Connect outdoor temperature sensor between termi-
1.
nals A1 and A2 to enable outdoor reset operation of
the boiler. If fixed temperature operation is required,
do not install outdoor sensor.
Mount sensor on exterior wall, shielded from direct sun-
2.
light or flow of heat or cooling from other sources.
If desired, install a summer/winter switch across termi-
3.
nals A1 and A2. When the switch is closed, the boiler
(space heating) circulator is disabled.
Route sensor wires through the holes provided on the
4.
right jacket panel of the boiler.
Connect storage indirect water heater (DHW)
aquastat between terminals DHW T1 and DHW T2.
18
Thermostat
dhw Aquastat