Electrical Wiring - UTICA BOILERS UB95M-200 Installation, Operation & Maintenance Manual

WARNING
!
Electrical shock hazard. Turn OFF electrical power
supply at service panel before making electrical
connections. Failure to do so could result in death or
serious injury.
10.1 Codes
Electrically bond boiler to ground in accordance with
requirements of authority having jurisdiction. In absence
of such requirements, Refer to:
• USA - National Electrical Code, ANSI/NFPA 70.
• Canada - Canadian Electrical Code, Part I, CSA C22.1:
Safety Standard for Electrical Installations.
10.2 Line Voltage Connections
1. Connect 120 VAC power wiring to line voltage terminal
strip on boiler control panel.
2.
Provide and install fused disconnect or service switch
(15 amp recommended) as required by code.
3.
Boiler circulator is shipped loose. Wire boiler circulator
as shown in wire diagram label on boiler side panel.
(CH L1, CH L2) CH = Central Heat
4. When connecting DHW circulator, connect wiring to line
voltage terminal strip on boiler control panel. (DHW L1,
DHW L2) DHW = Domestic Hot Water
5. Route all wires and conduits to openings in right jacket
panel.
10.3 Line Voltage Monitor
• Boiler is factory equipped with line voltage monitor that
continuously monitors incoming voltage for errors.
• When incoming line voltage is greater than 12% or less
than 8% of nominal voltage monitor will fl ash indicating
fault.
• Ten minutes after line voltage is back within acceptable
range green light will illuminate on monitor and boiler will
restart. Line voltage monitor is factory set at 115 VAC.
It is important that monitor be set to voltage present at
installation site by following these directions:
1. Using multimeter, locate wall outlet nearest to boiler
and determine line voltage present on site.
2.
Disconnect power to boiler.
3. Remove boiler cover.
4.
Locate line voltage monitor mounted to display panel.
5.
Remove line monitor protective cover.
6.
Using small screwdriver turn left dial until arrow points
at input voltage measured during step 1.
7.
Set right dial at 0.1 minutes, this is factory setting.
8.
Reinstall line monitor protective cover.
9.
Replace boiler cover and re-connect power to unit.

10 - ELECTRICAL WIRING

Figure 11 - Line Voltage Monitor
10.4 Low Voltage Connections
1. Connect low voltage wiring to low voltage terminal strip
as shown in boiler wiring diagram.
2.
Route all low voltage wires through opening on right
jacket panel. Use shielded cable.
Use only N.E.C. Class 1 wiring. If replacing original
boiler wiring, use only type 105°C wire or equivalent.
See Piping and Wiring Appendix for wiring
and piping diagrams.
19
L1 L2
NOTICE