Elect Rica L Connect Ions; General - UTICA BOILERS MAHF-75 Installation, Operation And Maintenance Manual

! D AN GER
Elect rocut ion Hazard! HI GH VOLTAGE -
Connect ions in t erm inal block M1 are high
volt age ( 120V / 60Hz) . Before m aking
connect ions, verify appliance is disconnect ed
from power supply. Respect t he input polarit y
on t erm inal block M1: L ( LI NE) - N ( NEUTRAL) .
Failure t o follow t hese inst ruct ions WI LL result in
deat h or serious inj ury.
!
W ARN I N G
Elect rical shock hazard. Turn OFF elect rical
power supply at service panel before m aking
elect rical connect ions. Failure t o do so could
result in deat h or serious inj ury.
8 .1 Genera l
Elect rically bond boiler t o ground in accordance wit h
requirem ent s of aut horit y having j urisdict ion. Refer t o:
• USA- Nat ional Elect rical Code, ANSI / NFPA 70.
• Canada - Canadian Elect rical Code, Part I , CSA
C22.1: Safet y St andard for Elect rical I nst allat ions.
• I nst all all wiring in accordance wit h requirem ent s of
Nat ional Elect rical Code and any addit ional nat ional,
st at e, or local code requirem ent s having j urisdict ion.
• I n Canada, inst allat ion m ust conform t o CSA C22.1
Canadian Elect rical Code Part 1 and any local codes.
• All wiring shall be N.E.C. Class 1.
• Boiler shall be elect rically grounded in accordance
wit h t he Nat ional Elect rical Code, ANSI / NFPA No.
70- lat est edit ion.
• Boiler requires a 120V 60Hz power supply. Ensure
elect rical supply is polarized.
• There shall only be one com m on isolat or, providing
com plet e elect rical isolat ion, for boiler and any
ext ernal cont rols. Using PVC insulat ed cable 12
AWGx3C 221° F ( 105 º C) .

8 .2 Elect rica l Connect ions

• Boiler requires 120V 60Hz power supply. Verify
elect rical supply is polarized.
• Boiler shall be grounded and on dedicat ed circuit .
• Shall be one com m on isolat or, providing elect rical
isolat ion for boiler and any ext ernal cont rols. Using
PVC insulat ed cable 18 AWGx3C 221° F ( 105° C) .
• All wiring m ust be inst alled in accordance wit h
requirem ent s of t he Nat ional Elect rical Code and any
addit ional nat ional, st at e, or local code requirem ent s
having j urisdict ion. All wiring m ust be N.E.C. Class 1.
• Canada, inst allat ion m ust conform t o CSA C22.1
Canadian Elect rical Code Part 1 and any local codes.
• I f replacing original boiler wiring use only TEW 105° C
or equivalent .
• If appliance is connected to in floor system, install
lim it t herm ost at t o prevent lat t er from overheat ing.
8 - ELECTRI CAL CON N ECTI ON S
Power Supply
Power
Consum ption
I nternal Fuse
( Qty. 2)
Electrode
Spark Gap
N o t e
FI GURE 8 - 1 Junct ion Box Left side of Boiler
4 2
Model 7 5 &
1 1 5
Size 1 0 0
118 W 125 W 133 W 142 W
1/ 8" to 3/ 16" [ 3.1 m m to 4.7 m m ]
Wir ing diagram s can be found in Appendix
A of t his Manual.
1 2 5 1 5 0 1 6 5
120V - 60Hz
173 W
F3.15 A
Junct ion Box
wit h Knockout s
and grom m et s
240013503 REV A, [ 03/ 15/ 2022]
2 0 5
182 W