Electrical Connections; General; Install Room Thermostat - UTICA BOILERS MAHF-100 Manual

!
DANGER
Electrocution Hazard! HIGH VOLTAGE -
Connections in terminal block M1 are high
voltage (120V / 60Hz). Before making
connections, verify appliance is disconnected
from power supply. Respect the input polarity
on terminal block M1: L (LINE) - N (NEUTRAL).
Failure to follow these instructions WILL result in
death or serious injury.
!
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.

8.1 General

Electrically bond boiler to ground in accordance with
requirements of authority having jurisdiction. Refer to:
• USA- National Electrical Code, ANSI/NFPA 70.
• Install all wiring in accordance with requirements of
National Electrical Code and any additional national,
state, or local code requirements having jurisdiction.
• All wiring shall be N.E.C. Class 1.
• Boiler shall be electrically grounded in accordance
with the National Electrical Code, ANSI/NFPA No.
70-latest edition.
• Boiler requires a 120V 60Hz power supply. Ensure
electrical supply is polarized.
• There shall only be one common isolator, providing
complete electrical isolation, for boiler and any
external controls. Using PVC insulated cable 12
AWGx3C 221°F (105 ºC).

8.2 Install Room Thermostat

Install room thermostat on inside wall. Do not install
where it will be influenced by drafts, hot or cold water
pipes, lighting fixtures, television, sun rays or near a
fireplace.

8.3 Electrical Connections

• Boiler requires 120V 60Hz power supply. Verify
electrical supply is polarized.
• Boiler shall be grounded and on dedicated circuit.
• Shall be one common isolator, providing electrical
isolation for boiler and any external controls. Using
PVC insulated cable 18 AWGx3C 221°F (105°C).
• All wiring must be installed in accordance with
requirements of the National Electrical Code and any
additional national, state, or local code requirements
having jurisdiction. All wiring must be N.E.C. Class 1.
• Canada, installation must conform to CSA C22.1
Canadian Electrical Code Part 1 and any local codes.
• If replacing original boiler wiring use only TEW 105°C
or equivalent.
• If appliance is connected to in floor system, install
limit thermostat to prevent latter from overheating.
8 - ELECTRICAL CONNECTIONS
Power Supply
Power
Consumption
Internal Fuse
(Qty. 2)
Electrode
Spark Gap
Note
FIGURE 8-1 Junction Box Left side of Boiler
40
Model
100 115
Size
118 W 125 W 133 W 142 W
1/8" to 3/16" [3.1 mm to 4.7 mm]
Wiring diagrams can be found in Appendix
A of this Manual.
125 150 165
120V - 60Hz
173 W
F3.15 A
Junction Box
with Knockouts
and grommets
240013371 REV B, [10/01/2021]
205
182 W