LAARS NeoTherm LC NTV1700 - Install and Operating Manual - Manual (Page 33)

NeoTherm LC Boilers and Water Heaters Page 29
Fig. 19 - DHW Piping - Two Heaters, Two Vertical Tanks
NOTES:
1. Optional CWMU & recirculation
line location.
2. Locate the NTV DHW sensor
or remote aquastat well
in lower 1/3 of tank.
3. Back flow preventer may be
required - check local codes.
4. Thermal expansion tank may be
required - check local codes.
5. Caution: Pump sizing must
be based upon water
hardness at job site.
WARNING: This drawing shows
suggested piping configuration and
valving. Check with local codes and
ordinances for additional requirements.
Building
return
Supply
TPRV
2
Ball valve
(typical)
2
1
3
4
3
Cold water
supply
Expansion
tank
4
Pump
Pump
Check valve
Check valve
TPRV
6B.6 NTV Suggested Pumps
See Table 8 for water flow and head requirements.
Note - The head loss for the piping, fittings, and
accessories must be calculated and added to the
heater head loss to get the total required pump head.
An undersized pump will result in insufficient flow.
The can result in scale buildup and failure of the
heat exchanger.
6B.7 Condensate Drain Trap
A condensate drain trap is included with the
NeoTherm LC and is designed to drain the boiler
of condensate. The vent condensate should be
drained through a drain tee located in the vent line.
This will help prevent excessive condensate from
entering the boiler condensate trap and preventing
the boiler from operating.
Connect a 3/4” PVC pipe between the drain
connection and a floor drain (or condensate pump if
a floor drain is not accessible).
The condensate drain must be installed to prevent
the accumulation of condensate. When a condensate
pump is not used, the tubing must continuously slope
downward toward the drain with no spiraling.
Consult local codes for the disposal method.
Caution
Condensate is mildly acidic (pH=5), and may harm
some floor drains and/or pipes, particularly those
that are metal. Ensure that the drain, drainpipe,
and anything that will come in contact with the
condensate can withstand the acidity, or neutralize
the condensate before disposal. Damage caused by
failure to install a neutralizer kit or to adequately
treat condensate will not be the manufacturer’s
responsibility.