LAARS NeoTherm LC NTV1700 - Install and Operating Manual - Manual (Page 31)

NeoTherm LC Boilers and Water Heaters Page 27
6B.2 NTV Piping Requirements
The water piping should be supported by suitable
hangers and floor stands. Do not support the piping
with this appliance. The hangers used should allow
for expansion and contraction of copper pipe. Rigid
hangers may transmit noise through the system
resulting from piping sliding in the hangers. We
recommend that padding be used when rigid hangers
are installed. Maintain 1” (2.5 cm) clearance to
combustibles for hot water pipes.
Pipe the discharge of the relief valve (full size) to
the drain or in a manner to prevent injury in the
event of pressure relief. Install a diaphragm-type
expansion tank, flow check, and shutoff valves
where needed or as required by code.
The piping should be installed so that each pump
supplies flow only to the heater to which it is
attached.
Section 6B - NTV Systems
6B.1 NTV Water Quality
NTV water heaters must be installed in water
conditions of 10 gpg hardness or less, with a pH
range of 6.5 to 9.5 pH. Values outside of this range
may reduce the life expectancy of the product.
Operating the NTV in water with higher hardness
levels will cause heat exchanger fouling, erosion,
or corrosion, leading to premature component
failure, reduced efficiency, heat exchanger failure
or system failure. Failure of this type will not be
warranted. If the water in use exceeds the conditions
recommended, water softeners or other devices
should be installed to improve water quality.
Fig. 17 - DHW Piping - One Heater, One Vertical Tank
NOTES:
1. Optional CWMU & recirculation line location.
2. Locate 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.
WARNING: This drawing shows
suggested piping configuration and
valving. Check with local codes and
ordinances for additional requirements. Location
of pump
Expansion
tank
TPRV
2
Supply
Building
return
Expansion
tank
Cold
water
supply
4
4
1
3
3