Knight WH- 286, Руководство по установке и эксплуатации

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Installation & Operation Manual
8
Field wiring
ELECTRICAL SHOCK HAZARD – For 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.
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.
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. 8-1).
3. The boiler pump is shipped loose. Wire the boiler
pump as shown in FIG. 8-1.
4. When connecting a domestic hot water (DHW) pump,
connect the wiring to the line voltage terminal strip as
shown in FIG. 8-1.
5. To activate a system pump, wire as shown in FIG. 8-1.
If the motor is larger than 1/8 hp or 1.8 amps, you must
isolate with a relay.
Figure 8-1 Line Voltage Field Wiring Connections
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation.

WARNING
NOTICE

CAUTION
Low voltage connections
1. Route all low voltage wires through the openings on the
bottom, as shown in FIG. 8-2.
2. Connect low voltage wiring to low voltage connection
board as shown in FIG. 8-3 on page 58 of this manual
and the boiler wiring diagram.
DIR #2000543313 00 HIGH VOLTAGE
WIRING OPENINGS
HIGH VOLTAGE
JUNCTION BOX
LOW VOLTAGE
CONNECTION BOARD
LOW VOLTAGE
WIRING OPENINGS
Figure 8-2 Routing Field Wiring
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:
1. An external energy management
system is installed that reduces the
boiler water temperature as the heating
load decreases.
2. This boiler is not used for any space
heating.
3. This boiler's input is 300,000 Btu/
hr or greater or is part of a modular or
multiple boiler system having a total
input of 300,000 Btuh/hr or greater.
4. This boiler is equipped with a tankless
coil.
NOTICE
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