lp-666 Rev. 003 Rel. 001 Date 2.25.20
37
Part 8 - Wiring - 2000 Models
WARNING
!
To avoid electrical shock, turn off all power to the boiler prior
to opening an electrical box within the unit. Ensure the power
remains off while any wiring connections are being made.
Failure to follow these instructions could result in component or
product failure, serious injury, or death. Such product failure IS
NOT covered by warranty.
Jumping out control circuits or components WILL VOID product
warranty and can result in property damage, personal injury, or
death.
CAUTION
!
Label all wires prior to disconnecting them when servicing
the boiler. Wiring errors can cause improper and dangerous
operation. Failure to follow these instructions may result in
property damage or personal injury.
It is of extreme importance that this unit be properly grounded. It
is very important that the building system ground is inspected by
a qualified electrician prior to making this connection. Electrical
power must only be turned on when the boiler is completely
filled with cold water. Failure to follow these instructions could
result in component or product failure, serious injury, or death.
Electrical Shock Hazard
- Turn off electrical power supply at
service entrance panel before making any electrical connections.
Failure to follow to do so could result in serious injury, or death.
Wiring must be NEC Class 1. If original wiring supplied with the
boiler must be replaced, use only TEW 105
o
C wire or equivalent.
Boiler must be electrically grounded as required by the National
Electrical Code, ANSI/NFPA 70 - Latest Edition.
CAUTION
A. 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.
B. Field Wiring
All connections made to the boiler in the field are done inside the
electrical junction box located in the front and left sides of the
unit. The High Voltage electrical junction box is located on the left
side of the boiler, and the Low Voltage Field Connection Board is
located to the right of the BIC928 control, on the control panel.
Multiple knockout locations are available to route field wires into
and out of the electrical junction box.
The control used in the boiler is capable of directly controlling
2 pumps in standard mode and 3 pumps when configured as a
cascade master boiler.
An external contactor relay or motor starter is required. The High
and Low Voltage Field Connection Boards have separate, clearly
marked terminal strips for line voltage and low voltage wiring.
Special jacks are provided for trouble-free cascade system wiring
using standard CAT3 or CAT5 patch cables.
C. Line Voltage Wiring for Standard Boiler
NOTE:
A termination plug is included in the CAT 3 / CAT 5 Bus
Connection Point, labeled J6 in Figure 34. DO NOT REMOVE THIS
PLUG! Doing so will affect boiler operation and void warranty.
1. All high voltage cables should enter the boiler through the
provided knock out holes as shown in Figure 30.
2. Connect the 208VAC-3P WYE configuration incoming power
wiring to the five pin terminal connector labeled 208VAC 3P IN
of the High Voltage Field Connection Board (shown in Figure 31).
Ground goes to the G terminal. Neutral goes to N. The three Hot legs
connect to the L1-L3 terminals.
3. A line voltage fused disconnect switch may be required to be
externally mounted and connected according to local wiring codes.
CH Pump Wiring
Connect the Line of an externally provided 120VAC service to the TOP
terminal of the three terminal barrier strip labelled P2 NO (Normally
Open).
1. Connect the boiler pump relay COIL Line input to the CENTER
terminal of P2 NO (Normally Open).
2. Connect the Neutral of an externally provided 120VAC service to the
Neutral COIL terminal of the pump relay.
3. Connect the Line of an externally provided 120VAC service to the NO
CONTACT of the pump relay.
4. Connect the other NO relay CONTACT to the LINE input of the boiler
pump.
5. Connect the Neutral of an externally provided 120VAC service to the
Neutral input of the pump.
6. Connect the Earth Ground of the externally provided 120VAC to the
Earth Ground input of the pump.
DHW Pump Wiring
1. Connect the Line of an externally provided 120VAC service to
the TOP terminal of the three terminal barrier strip labelled P4 NO
(Normally Open).
2. Connect the DHW pump relay COIL Line input to the CENTER
terminal of P4 NO (Normally Open).
3. Connect the Neutral of an externally provided 120VAC service to the
Neutral COIL terminal of pump relay.
4. Connect the Line of an externally provided 120VAC service to the NO
CONTACT of the pump relay.
5. Connect the other NO relay CONTACT to the LINE input of the DHW
pump.
6. Connect the Neutral of an externally provided 120VAC service to the
Neutral input of the pump.
7. Connect the Earth Ground of the externally provided 120VAC to the
Earth Ground input of the pump.
HIGH VOLTAGE 2000 Model
CH PUMP
PORT
SYS PUMP
PORT
VOLTAGE
208VAC-3P WYE
INPUT
DHW PUMP
PORT
LOW VOLTAGE - 2000 Model
Figure 30 - Knockout Locations - 2000 Model Only
D. Alarm Connections
The control includes a dry contact alarm output. This is an SPDT circuit,
rated at 5 amps at 120 volts. This contact can be used to activate an
alarm light or bell or notify a building management system if the
boiler goes into a lockout condition. The circuit between the common
and ALARM NC terminals is closed during normal operation and the