LP-314 Rev. 012 Rel. 003 Date 9.27.19
29
NOTE:
Check with your local gas company to determine if
combustion condensate disposal is permitted in your area. In the
state of Massachusetts, condensate must be neutralized before
entering a drain.
This condensing high efficiency appliance has a condensate removal
system. Condensate is water vapor derived from combustion
products, similar to that produced by an automobile when it is
initially started. It is very important that the condensate line is
sloped down away from the appliance and to a suitable drain.
If the appliance condensate outlet is lower than the drain, you must
use a condensate removal pump (kit p/n 554200 available from
HTP). If required by local authorities, a condensate filter of lime
crystals, marble, or phosphate chips will neutralize slightly acidic
condensate. This can be installed in the field and purchased from
HTP (p/n 7450P-212).
The condensate line must remain unobstructed. If allowed to
freeze in the line or obstructed in any other manner, condensate
can exit from the appliance tee, resulting in potential water
damage to property. When installing a condensate pump, select
one approved for use with condensing appliances and furnaces.
The condensate pump should have an overflow switch to prevent
property damage from spillage. Condensate from the appliance
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
appliance is powered off the condensate pump will remain on. It
is important to remember to turn off the condensate pump when
powering down the appliance. Failure to do so could result in
property damage, severe personal injury, or death.
Figure 21 - Condensate Piping
NOTES:
1. Condensate line must be pitched at least ¼” per foot to properly
drain. If this cannot be done, or a very long length of condensate
hose is used, increase the condensate line to a minimum of 1” ID and
place a tee in the line after the condensate neutralizer to properly
reduce vacuum lock in the drain line.
2. PVC or CPVC pipe should be the only material used for condensate
line. Steel, brass, copper, and other metals will be subject to
corrosion or deterioration.
3. A frozen condensate line could result in a blocked vent condition.
It is very important to protect the condensate line from freezing
temperatures or any type of blockage. In installations that may
encounter sustained freezing conditions, the use of heat tape
is recommended to avoid freezing of the condensate line. It is
also recommended to bush up the condensate line size to 1” and
terminate condensate discharge as close to the unit as possible. Longer
condensate runs are more prone to freezing. Damages due to frozen or
blocked condensate lines ARE NOT covered by warranty.
4. Support of the condensate line may be necessary to avoid blockage
of the condensate flow.
Part 7 - Wiring
To avoid electrical shock, turn off all power to the appliance 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.
A. Field Wiring
All the wiring connections made to the appliance in the field are done
on the field connection board located on the right side of the cabinet.
The cabinet has multiple knockouts available to route field wiring into
and out of the field connection board. The control provides a pump
output thermostat and outdoor sensor inputs to operate the central
heating system.
B. Line Voltage Wiring
1. Connect the normal
incoming power
to the terminals marked as
shown in Figure 22. A line voltage fused disconnect switch may be
required to be externally mounted and connected according to local
codes and standards.
2. Connect the
central heating pump
as shown in the terminals
marked CH/DHW PUMP (see Figure 22). The connections shown are
suitable for a maximum continuous pump draw of 3 amps at 120
volts. If the pump requires more current or voltage than the 120 volts
supplied, an external motor starter will be required.
3. Connect the
NHX pump (if applicable)
as shown in the terminals
marked NHX PUMP (see Figure 22). The connections shown are suitable
for a maximum continuous pump draw of 3 amps at 120 volts. If the
pump requires more current or voltage than the 120 volts supplied, an
external motor starter will be required.
NOTE: Wiring must be N.E.C. Class 1. If original wiring as supplied with
appliance must be replaced, use only TEW 105
o
C wire or equivalent.
Appliance must be electrically grounded as required by National
Electrical Code ANSI/NFPA 70 – latest edition.
C. Low Voltage Wiring
1. Make all low voltage connections to the terminal strip located on the
field connection board (shown in Figure 22) as outlined below.
2. The
room thermostat
should be connected to the terminals marked
T STAT (shown in Figure 22). Alternately, any dry contact closure across
these terminals will cause the unit to operate the hydronic heating
module. NOTE: Caution must be used to ensure neither of the terminals
becomes connected to ground. Mount the thermostat on an inside
wall as central as possible to the area being heated, away from drafts
or heat producing devices such as a television, which could influence
the ability of the thermostat to measure room temperature accurately.
NOTE:
If the thermostat is equipped with a directly connected
anticipator, the anticipator should be set at .1 amps. If the thermostat
is connected to other devices, the anticipator should be set to match
the power requirements of those connected devices. Refer to the
instruction manuals of the connected devices for further information.
3. The
outdoor sensor
must be connected for the unit to operate at
optimum efficiency. Use a minimum 22 AWG wire for runs of 100 feet
or less and minimum 18 AWG wire for runs up to 150 feet. Instructions
are included with the outdoor sensor to correctly mount the sensor
Part 6 - Condensate Removal