Electrical - Thermal Solutions EVO-500 Installation, Operating And Service Instructions

F.

ELECTRICAL

1. General. Install wiring and ground boiler in
accordance with authority having jurisdiction or in
absence of such requirements National Electrical
Code, ANSI/NFPA 70 and/or CSA C22.1 Electrical
Code.
WARNING
Failure to properly wire electrical connections to
the boiler may result in serious physical harm.
DO NOT ATTACH ADDITIONAL J-Box to back or
top of boiler jacket.
DANGER
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.
2. 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. Locate the service switch such
that the appliance can be shut off without exposing
personnel to danger in the event of an emergency.
3. Connect the main power supply and ground from
fused disconnect to proper boiler electrical leads
located in the junction box at the rear of the boiler.
Refer to electrical consumption plate on boiler
jacket.
4. Remove factory supplied jumper wire from
terminals 4 and 5. Connect field supplied safety
limits or devices using proper terminals provided in
boiler electrical cabinet. Refer to wiring diagram
supplied with boiler for wiring information. Refer
to Figures 9a-9c for typical wiring diagrams. Refer
to Figure 1 for electrical requirements for boiler.
Each boiler must be protected with a dedicated
properly sized fused disconnect.
Electrical power may be supplied from more than
one service. Make sure all power is off before
attempting any electrical work.
The wiring diagrams contained in this manual are
for reference purposes only. Each boiler may be
wired differently according to the specifications
given to Thermal Solutions at the time the boiler
was purchased. Always use the wiring diagram
provided with the boiler. If the wiring diagram
provided with the boiler is unavailable, STOP all
wiring work and contact Thermal Solutions for a
replacement diagram.
Do not directly connect low voltage (24 volt,
milliamp, etc.) controls to this boiler.
voltage controls are desired, isolating relays must
be used.
Never jump out or bypass any safety controls.
Never jump out or make inoperative any safety
or operating controls. Each boiler must be
protected with a properly sized over-circuit
device.
5. The following pages have sample wiring diagrams.
Contact Thermal Solutions Representative or visit
website (www.thermalsolutions.com) for current
wiring options.
6. An as-built wiring diagram is included with every
boiler when it is shipped from the factory.
25
CAUTION
WARNING
If low