Eco-King HWB-299, Installation And Service Manual

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E93.1801EN171 HWB installation manual 26
7 CONNECTIONS
Water heater connections
1 – Water outlet / Flow
2 – Water inlet / Return
3 – Gas
4 – Condensate trap clean out.
5 – Condensate drain
6 – Automatic air drain.
Gas pipe connection
The gas supply piping must conform to all local codes and regulations and/or National Fuel Gas Code, ANSI
Z223.1/NFPA 54. In Canada refer
to CAN/CGA B149.1 installation code, and local codes for gas piping require-
ments and sizing. Pipe size running to the appliance depends on: Length of pipe; Number of fittings; Maximum
input requirement of all gas appliances in the residence. See the gas sizing table below for help when sizing the
gas connection.
For information on propane sizing consult your local propane gas supplier.
Schedule 40 Metallic Pipe in Cubic Feet of Natural Gas per Hour.
(Based on inlet pressure less than 2 psi, pressure drop of 0.3 W.C. and specific gravity 0.6)
Nominal Pipe
Size (In)
¾” 1” 1¼” 1½” 2”
Length (ft)
10 273 514 1060 1580 3050
20 188 353 726 1090 2090
30 151 284 583 873 1680
40 129 243 499 747 1440
50 114 215 442 662 1280
60 104 195 400 600 1160
70 95 179 368 552 1090
80 89 167 343 514 989
90 83 157 322 482 928
100 79 148 304 455 877
7.2.1 G
AS LINE CONNECTION
Consult, the gas code to determine gas pipe size. It is required to install a manual shutoff gas valve in front of the
gas pressure regulator to make sure that the gas line can be closed in case of maintenance. The entire piping
system, gas meter and regulator must be sized properly to prevent pressure drop greater than 1" wc as stated in
the NFPA54. If you experience a pressure drop of greater than 1” w.c., regulator or gas line is undersized.
Eco King Heating Products Inc. recommends a nominal value of
7” to 10” W.C. of gas pressure when using Natural
gas and 11 to 13” W.C. when using LPG, will be available at the water heater gas valve inlet at maximum water
heater firing rate. See technical specifications datasheet for minimum and maximum allowed gas pressures.
When an in-line regulator is used to drop gas pressure from 2 psi to 0.5 psi, it must be located a minimum of 6 ft
from the water heater.
Eco King requires a minimum 1” diameter flex hose if flex gas hose is going to be used. Ensure that: the gas line
connection to the appliance does not apply any weight or pressure to the gas valve.
Create an installation layout such that the piping does not interfere with the vent pipe, or any other serviceable
components.
The appliance shall be installed such that the gas ignition system components are protected from water (dripping,
spraying, rain etc.) during installation, operation and servicing.
No appreciable drop in line pressure should occur when any unit (
or in the instance of a cascade installation when
all of the installed units)
lights or runs. Use common gas line sizing practices. Make sure the gas pressure is within
specification during all conditions. Always use a pipe-threading compound. Apply sparingly to all male threads,
starting at two threads from the end. Over doping or applying dope to the female end, can result in a blocked gas
line.
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