Field Wiring; Line Voltage Connections; Low Voltage Connections - Lochinvar Knight XL 100 Series Installation & Operation Manual

9

Field wiring

ELECTRICAL SHOCK HAZARD – For
⚠ WARNING
your safety, turn off electrical power
supply before making any electrical
connections to avoid possible electric
shock hazard. Failure to do so can cause
severe personal injury or death.
Wiring must be N.E.C. Class 1.
NOTICE
If original wiring as supplied with boiler
must be replaced, use only type 105°C
wire or equivalent.
Boiler must be electrically grounded as
required by National Electrical Code
ANSI/NFPA 70 – latest edition.
Label all wires prior to disconnection
⚠ CAUTION
when servicing controls. Wiring errors
can cause improper and dangerous
operation.
Figure 9-1 Line Voltage Field Wiring Connections
120V SUPPLY
NEUTRAL
W
GROUND
G
LINE
BK
SERVICE
SWITCH
BK
SYSTEM
G
PUMP
W
BK
BOILER
G
PUMP
W
BK
DOMESTIC
G
HOT WATER
W
PUMP
L2/N G L1
52
Installation & Operation Manual
Installation must comply with:
1. National Electrical Code and any other national, state,
provincial, or local codes, or regulations.
2. In Canada, CSA C22.1 Canadian Electrical Code Part 1,
and any local codes.

Line voltage connections

1. Connect 120 VAC power wiring to the line voltage terminal
strip in the junction box, as shown in FIG. 8-1.
2. Provide and install a fused disconnect or service switch
(15 amp recommended) as required by the code (see
FIG. 9-1).
3. When connecting a domestic hot water (DHW) pump,
connect the wiring to the line voltage terminal strip as
shown in FIG. 9-1.
4. To activate a system pump, wire as shown in FIG. 9-1. Dry
contacts are sized for 1.5 hp/120V, 3 hp/240V or 30 amps.

Low voltage connections

1. Route all low voltage wires through the knockouts in the
rear of the boiler, as shown in FIG. 9-2.
2. Connect low voltage wiring to the low voltage connection
board as shown in FIG. 9-3 and the boiler wiring diagram.
Figure 9-2 Routing Field Wiring
LOW VOLTAGE
CONNECTION BOARD
LOW VOLTAGE
WIRING KNOCKOUTS
DIR #2000585210 00
LINE VOLTAGE
JUNCTION BOX
LINE VOLTAGE
WIRING KNOCKOUTS