WHL-038 Rev. 1.29.16
31
The condensate line must remain unobstructed. If allowed
to freeze in the line or obstructed in any other manner,
condensate can exit from the boiler tee, resulting in potential
water damage to property. When installing a condensate
pump, select one approved for use with condensing boilers
and furnaces. The condensate pump should have an overflow
switch to prevent property damage from spillage. Condensate
from the boiler will be slightly acidic (pH from 3.2 to 4.5).
Install a neutralizing filter if required by local codes.
Power to the optional condensate pump is continuous. When
the boiler is powered off the condensate pump will remain
on. It is important to remember to turn off the condensate
pump when powering down the boiler. Failure to do so could
result in property damage, severe personal injury, or death.
Is is very important that condensate piping be no smaller
than 3/4”. Use a tee at the condensate connection with a
branch vertically up and open to the atmosphere to prevent a
vacuum that could obstruct the flow of condensate from the
boiler. To prevent sagging and maintain pitch, condensate
piping should be supported with pipe supports.
When installing a condensate pump, select one approved for
use with condensing boilers and furnaces. The pump should
have an overflow switch to prevent property damage from
condensate spillage.
Part 6 - Wiring
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.
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.
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.
KNOCKOUT LOCATIONS
FOR CONNECTION TO
ELECTRICAL JUNCTION BOX
LP-517-R
08/17/15
Figure 21 - Knockout Locations
B. Field Wiring
All connections made to the boiler in the field are done inside
the electrical junction box located on the side of the unit. The
electrical junction box is located on the left side of the boiler.
Multiple knockout locations are available to route field wires
into and out of the electrical junction box.
The boiler control is capable of directly controlling 2 pumps
when in standard mode and 3 pumps when configured as a
cascade master boiler. When configured as a standard unit,
each pump output can provide a maximum of 2 amps at 120
volts. If pumps used require more than this amount of power,
an external contactor or motor starter is needed. If the boiler
is configured as a cascade master, the system pump output is a
dry contact output capable of switching 5 amps at 120 volts in
addition to the boiler pump and DHW pump outputs sourcing 2
amps each.
The electrical junction box has 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 J3 in Figure 22. DO NOT REMOVE
THIS PLUG! Doing so will affect boiler operation and void
warranty.
1. Connect the incoming power wiring to the line voltage
terminal strip in the electrical junction box at terminals 120V,
NEUT, and GND (shown in Figure 22).
2. A line voltage fused disconnect switch may be required to be
externally mounted and connected according to local wiring
codes.
3. Connect the central heating pump to the terminals marked
1 (BOILER HOT), 2 (BOILER NEUT), and 3 (BOILER GRD). The
connections shown are suitable for a maximum continuous