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103448-10- 6/18
VIII. Electrical
A. General.
Install wiring and electrically ground
boiler in accordance with requirements of
authority having jurisdiction or, in the absence of
such requirements, follow the
National Electrical
Code
, ANSI/NFPA 70, and/or
Canadian Electrical
Code
Part 1, CSA C22.1 Electrical Code.
B. A separate electrical circuit
must be run from
the main electrical service with an over-current
device/disconnect in the circuit. A service switch
is recommended and may be required by some
local jurisdictions. Install the service switch in the
line voltage “Hot” leg of the power supply. Locate
the service switch such that the boiler can be
shut-off without exposing personnel to danger in
the event of an emergency. Connect the main
power supply and ground to the 3 boiler wires
(black, white and green) located in the junction
box at top left side of the boiler jacket.
C. Refer to Figures 27 and 28 for details on the
internal boiler wiring.
Line Voltage (120 VAC) Connections - see Figure
27.
1. The line voltage connections
are located
in the junction box on the left side of the
vestibule. The terminal block TB-1 in
conjunction with terminal screw identification
label is attached to the junction box
combination cover/inside high voltage bracket.
IMPORTANT
This boiler is equipped with a feature that saves energy by reducing the boiler water
temperature as the heating load decreases. This feature is equipped with an override which is provided
primarily to permit the use of an external energy management system that serves the same function. THIS
OVERRIDE MUST NOT BE USED UNLESS AT LEAST ONE OF THE FOLLOWING CONDITIONS IS TRUE:
• An external energy management system is installed that reduces the boiler water temperature as
the heating load decreases.
• This boiler is not used for any space heating.
• This boiler is part of a modular or multiple boiler system having a total input of 300,000 BTU/hr or
greater.
• This boiler is equipped with a tankless coil.
NOTICE
This boiler is equipped with a high water temperature limit located inside the internal wiring of the
boiler. This limit provides boiler shutdown in the event the boiler water temperature exceeds the set point
of the limit control. Certain local codes require an additional water temperature limit. In addition, certain
types of systems may operate at temperatures below the minimum set point of the limit contained in the
boiler.
If this occurs, install an additional water temperature limit (Honeywell L4006 Aquastat). Wire as indicated
in the Electrical Section of this manual
All wire, wire nuts, controls etc. are installer supplied unless otherwise noted.
DANGER
Electrical Shock Hazard. Positively assure all electrical connections are unpowered
before attempting installation or service of electrical components or connections of the boiler or building.
Lock out all electrical boxes with padlock once power is turned off.
Electrical Shock Hazard. Failure to properly wire electrical connections to the boiler may
result in serious physical harm.
Electrical power may be from more than one source. Make sure all power is off before attempting any
electrical work.
Each boiler must be protected with a properly sized over-current device.
Never jump out or make inoperative any safety or operating controls.
The wiring diagrams contained in this manual are for reference purposes only. Each boiler is shipped with
a wiring diagram attached to the front door. Refer to this diagram and the wiring diagram of any controls
used with the boiler. Read, understand and follow all wiring instructions supplied with the controls.
WARNING
Summary of Contents for Alpine ALP080B
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Page 77: ...103448 10 6 18 77 VIII Electrical continued Figure 27 Wiring Connection Diagram...
Page 78: ...78 103448 10 6 18 Figure 28 Ladder Diagram VIII Electrical continued...
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