Intellihot iN199, Installation & Operation Manual

Page: 33 / 78

29 iN199 Water Connections
November 2021 - 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: If the incoming water is known to have a high mineral
content or “hardness” (see “17. Warranty” on page
67), 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
Note: Wye-Strainer not shown for clarity.
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 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.
5. 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.
6. 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 might require an in-line neutralizer to
be installed (not included) to treat this water. The maximum
condensate flow rate is 1.4 GPH.
1. Install a 3/4" flexible hose to the hose connection on the
water heater.
Note: If a floor drain is used to remove the discharge,
route the drain line over or into the drain. The line
should freely drain. The line termination should not be
immersed in water.
2. Follow applicable local codes and if required, install in-line
neutralizer to treat the acidic condensate. Follow all the
installation instructions included with the neutralizer.