29
iN401 - iN501 Water
Connections
May
2019
-
Revision
00
SAFETY
INSTRUCTIONS
Do not insulate the pressure relief valve.
8. With the unit OFF, open a nearby hot water faucet and
allow the water to flow through the unit until all the
trapped air is exhausted from the water pipes and from
the water heater.
9. Leak test the water piping. Repair any leaks immediately.
8.3 Cold Water Connection
Install and connect the cold water pipes.
Note 1:
If the incoming water is known to have a high
mineral content or “hardness” (see “17. Warranty”
on page 61), treatment is recommended
upstream from the water heater.
When the water heater is installed in a closed loop
recirculation system, and if the cold water supply pipe has
a back flow preventer, then an expansion tank should be
installed to allow for water expansion as per the diagrams in
“3.7 Configuration Options” on page 9.
CAUTION
To prevent adverse health issues, only materials (pipes,
fittings, valves, solder, etc.) that are approved for use
in potable water systems should be used.
1. Connect a 1-1/2” NPT coupler to the water heater’s cold
water connection.
2. Install a 1-1/2” union connection.
Union
Shut-off
Valve
3. Following local building codes, install a 1-1/2” manual
shut-off valve with 1-1/2” NPT fittings.
4. Connect the unit to the existing cold water pipes.
5. Connect the unit to the building’s cold water pipes. If
multiple water heaters are being installed, the diameter
of the main cold water pipe needs to be sized by an
engineering professional.
Note:
Isolation valve kits can be used if incoming water
treatment is anticipated (such as a water softener) due to
hardness levels or heavy usage of the unit.
6. With the unit OFF, open a nearby cold water faucet
and allow the water to flow through the unit until all the
trapped air is exhausted from the water pipes and from
the water heater.
7. Leak test the water pipes. Repair any leaks immediately.
8.4 Condensate Drain Line
Due to its efficient design, the water heater produces
condensate (water) as a normal by-product of heating the
water.
This condensate is acidic, with a pH level between 3 and 4.
Local building codes may require an in-line neutralizer, such as
the iB3
0
01, to be installed (not included) to treat this water.
The maximum condensate flow rate is 3.6 GPH.
1. Install a 3/4” flexible hose to the hose connection on the
water heater.
a. If a floor drain is used to remove the discharge, route
the drain hose over or into the drain.
Note:
Ensure that the flex tube is not pinched or kinked.
The tube should freely drain. The tube termination
should not be immersed in water.
2. Follow applicable local codes and if required, install in-line
neutralizer (iB3001 )to treat the acidic condensate.
Follow all the installation instructions included with the
neutralizer.
Note:
Whenever a condensate neutralizer is required, it is
suggested that a iB3001 telliBot Condensate Neutralizer be
used. When used in a cascading application, use one telliBot
unit per water heater.
