User Guide

On-Demand Rack System • 7
INSTALLATION
isolated from the gas supply
piping system by closing its
manual shutoff valve during any
pressure tes ng of that system
at test pressures equal to or less
than 1/2 psi (3.5 kPa).
7
Connect the
Power Supply
• Confi rm that the installa on
complies with local electrical code
requirements. In the absence of
such requirements, follow the
Na onal Electrical Code ANSI/NFPA
70 (current edi on) in the U.S. or
CSA C22.1 Canadian Electrical Code,
Part 1 (current edi on) in Canada.
• Indoor models include a factory
installed, 6-foot (1.83m) long power
cord.
• Outdoor models must be hard wired.
• The water heaters require 120 VAC,
60 Hz electrical power supply that is
properly grounded.
• The electrical connec on must
provide a means of disconnec on (to
terminate power to the water heaters
for servicing and safety purposes).
Also, the water heaters must be
electrically grounded. Do not a ach
the ground wire to either the gas
or water piping. Installa on must
comply with all code requirements.
• Power Requirements
One 15 amp breaker can adequately
protect up to seven water heaters.
Example:
Number of
Heaters
Breaker Size
(Amps)
Number of
Breakers
1 to 7 15A 1
8 to 14 15A 2
15 to 20 15A 3
• Refer to the water heaters’
Installation Manual and Owner’s
Guide for instructions.
8
Configure the
System
If your rack system contains up to
four water heaters, configure it with
the Easy-Link System.
Refer to the
water heaters’ Installation Manual and
Owner’s Guide for instructions.
However, if your rack system contains
five or more water heaters, you must
install and configure a multi-unit
controller (part number 100112691).
• A multi-unit controller can connect
up to 20 water heaters, making it
easy to use multiple racks.
• The mul -unit controller is available
as an accessory item. It can be
ordered along with the rack system
or later through your local service
agency/installer.
• If a mul -unit controller is ordered
with a wall mount or free standing
(in-line) system, it can be installed
on either end of the assembly.
However, a controller-moun ng
kit is necessary to complete
the installa on. This kit is sold
separately and must be installed
on site by the installing contractor.
(Kit part number: 100211495.) The
moun ng kit includes two 14-in. long
moun ng bars and two moun ng
brackets.
ᴏ
Wall mounted rack systems only:
Install the bars onto either end
as shown in Figure 4.
ᴏ
Free standing rack systems: The
mul -unit controller may be
mounted on either side of the
rack or on a nearby wall. The
moun ng hardware must be
fi eld supplied.
See also Piping Requirements, p. 5.
9
Final Installation
Checklist
WARNING
• Do not install outdoor systems indoors.
Nut
T-Bo l t
A.) Place T-Bolt through bracket
ŚŽůĞĂƐƐŚŽǁŶĂƚůĞŌƚŚĞŶ
start nut on opposite side.
Repeat for other bracket.
Bracket Hole
B.) Insert head of T-Bolt into
dͲŚĂŶŶĞůƐůŽƚƚŚĞŶ
rotate it 90°. Tighten nut.
(Torque: 25 Nm +/- 5%)
T-Channel Slot
T-Bo l t
Nut
DŽƵŶƟŶŐ
Bar
DŽƵŶƟŶŐ
Bar
/ŶƐĞƌƚƚŚĞŶ
Rotate 90°
to lock.
ͿĞƚĞƌŵŝŶĞůŽĐĂƟŽŶ
ŽĨƐĞĐŽŶĚŵŽƵŶƟŶŐ
bar. It must align
ǁŝƚŚƚŚĞŵŽƵŶƟŶŐ
hole(s) on the
ŵƵůƟͲƵŶŝƚ
ĐŽŶƚƌŽůůĞƌƐŇĂŶŐĞ
D.) Repeat steps A and B
to install the second
ŵŽƵŶƟŶŐďĂƌ
A
B
C
Figure 4: Controller Bracket
Installation for Wall
Mounted Systems.