48
Plumbing
INSTALLATION INSTRUCTIONS
Water Supply
Water Supply Installation
NOTICES:
• Use only Teflon tape on all COLD and HOT water
connections.
• I f the water flow resistance of a showerhead is
too high, the burner in the water heater will fail to
ignite. Keep all showerheads clean from debris that
could cause additional pressure drop.
• I f using mixing valves on the outlet, choose one that
prevents COLD water pressure from overcoming HOT
water pressure.
• I f multiple water heaters are installed in a manifold
system, the water piping MUST be in “parallel” and
the water pressure at each water heater should be 40
psi (276 kPa).
Install a COLD water shut-off valve near the inlet
line on the water heater. This valve will be used for
servicing and draining purposes.
NOTICE: It is not recommended to use pipes
with smaller diameters than the water supply
connection of the water heater.
Before attaching the water line to the water heater,
open the shut-off valve. Run the water until it
has purged all contaminants (sand, debris, air,
caulking, etc.).
Install a service valve on the end of the COLD water
supply line and connect it to the water inlet on the
water heater.
To ensure proper operation of the water heater, follow
these water pressure guidelines.
• Operation of the water heater requires a minimum
water pressure of 14 psi (97 kPa) and a minimum
water flow rate of 0.4 gpm (1.5 lpm).
• Water pressure of 40 psi (276 kPa) is required to
achieve maximum flow rate.
• T o maintain proper performance, there must be
sufficient water supply pressure.
Required Water Pressure =
Min. Operating Water Pressure
(14 psi [97 kPa])
+ Pipe Pressure Loss
+ Faucet Pressure Loss
+ Safety Margin
(more than 5 psi [34 kPa]).
• T o supply HOT water to upper floors, additional water
pressure will be required (0.44 psi [3 kPa]
per foot of height). Calculate the distance between
the water inlet of the water heater (ground level) to
the HOT water faucet farthest away from the water
heater (upper floor level).
• Well water systems should be set to ensure a
minimum system pressure of 40 psi (276 kPa). The
pressure should remain constant and stable during
the operation of the water heater.
• Gravity water pressure is not recommended. When
the water is supplied from a water supply tank, the
height of the tank, the diameter of the supply pipes,
and their relation to water pressure need to be taken
into consideration.
1
Water Supply Connections (cont.)
2
3
To Next Page
Loading...
