Whirlpool T-K2 - Manual (Page 11)

Water Plumbing
Follow local guidelines for the length of the
plumbing line in order to ensure that there is
enough water pressure for all the fixtures on
the line. First, calculate the effective length of
the plumbing line by measuring the total length
of pipe, and then adding to this 5’ for each
elbow or tee in the line. Use the following
chart to determine the total number of fixture
units on the line, and then compare with the
chart at the bottom of this page to find the pipe
diameter and water pressure necessary.
Install with control valves on the inlet and
outlet, and use removable unions or
connectors to facilitate maintenance or service
if necessary.
If the water heater is installed in a closed
water system, means shall be provided to
control thermal expansion. Contact the water
supplier or a local plumbing inspector on how
to control this situation.
Purge the water line of air, and clean the filter
before initial operation.
WARNING: Do not reverse the hot outlet and
cold supply line connections to the Flash
Water Heater. Make sure the hot and cold
lines are connected as in the FOR YOUR
SAFETY section at the front of this manual.
Pressure Relief Valve
An approved pressure relief valve must be
installed in any installation with this unit. The
pressure relief valve must be installed on the
hot line out of the unit, with no check valves or
control valves between the unit and the relief
valve.
The Pressure relief valve must be rated for
150 PSI, and have a discharge capacity of
185,000 BTU. Connect the discharge opening
of the relief valve to a suitable drain to prevent
water damage should discharge occur.
If the pressure relief valve discharges
periodically, this may be due to thermal
expansion in a closed water supply system.
Contact the water supplier or local plumbing
inspector on how to correct this situation.
Do not plug the pressure relief valve. The line
should have no reduced fittings or other
restrictions and should allow for complete
drainage of valve and line. The pressure relief
valve should be manually operated once a
year to check for correct operation.
Should overheating occur or the gas supply
fail to shut off, turn off the manual gas control
valve to the appliance.
Length to the End of Hot Water Line and Recommended Fixture Units
Pressure Range 30 to 45 PSI Pressure Range 46 to 60 PSI Pressure Range 60+ PSI
Pipe
Size
100' 200' 300' 400' 100' 200' 300' 400' 100' 200' 300' 400'
3/4" 3-12 1-6 1-5 0-4 5-17 3-11 2-8 1-6 6-20 4-13 3-10 2-8
1" 12-25 6-17 5-13 4-12 17-36 11-25 8-20 6-18 20-39 13-32 10-26 8-22
1-1/4" 25-48 17-32 13-25 12-21 36-78 25-52 20-39 18-33 39-78 32-74 26-54 22-43
Fixture Unit Per Fixture (from UPC)
Plumbing Fixture
Description
Fixture
Unit
Combination Bath / Shower 4
Whirlpool Bath 4
Shower 2
Lavatory 1
Clothes Washer 4
Dishwasher 1.5
Kitchen Sink 1.5