Hubbell G250P, Installation & Operation Manual

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31
All
Hubbell
water heaters are designed to connect
multiple units together. Multiple units increase the
volume of hot water and also ensures that hot water is
always available, even if one unit is shut down due to
maintenance.
Connecting several units together requires proper sizing
of water and gas piping, as well as increased siz
ing
in
the intake and exhaust pipes.
Up to ten water heaters can be connected (cascading)
together. Use the steps in this section along with the
basic installation procedure for installing a single unit.
The water heaters will communicate, via the cable
provided with the water heater, during normal operation:
• When demand for hot water is low, fewer units will
operate.
• If one unit has an error code, the others will continue to
operate.
• Changing the settings (temperature, time, etc.) on one
unit changes settings on all the units.
• It is possible to shut one unit down for maintenance
while the others continue to operate.
1. Connect all the units to a gas supply pipe. Make sure
the pipe is properly sized in accordance with the BTU
draw and number of units being operated.
Gas Valve Adjustments Section MULTIPLE UNITS
NOTE
:
Each units can be single vented or joined
together in a common vent
IH-82