ICC Mirius, Installation Instructions Manual

Page: 8 / 56

8
INSTALLATION CONSIDERATIONS
There are two types of displays to consider when installing the
ICC gateway modules to the water heaters, the older type with
membrane switches and the newer style with a touch screen. The
new touch screen style display does not need the provided
RJ-485 splitter and it can be discarded.
TOUCH SCREEN STYLE DISPLAY INSTALLATION
HIGH EFFICIENCY WATER HEATER INSTALLATION – (BTH OR
BTX MODELS)
Follow the directions under general guidelines for connecting the
module to the Energy Management System and power. This
section will guide the installer on how to mount and connect the
module to the water heater. The control box and mounting location
on the water heater is on the top of the unit behind the display
module. See Figure 13 .
Connection of the RJ-45 end of the communication cable to the
heater is required to plug into J13 of the control board inside the
“black controls box” (for newer models) requiring removal of two
screws holding the lid on. After plugging in the communications
cable, route the cable to the bottom side with the other cables and
put the lid back on with the two screws.
If the control board is in a “grey controls box” (for older model),
double check to make sure the display is not one with membrane
switches below and to the right of the display. If the display uses
membrane switches, please follow directions under the section
“MEMBRANE SWITCH STYLE DISPLAY INSTALLATION”. If it
has a grey box and is a touch screen display (replacement of
original) then the communications cable must be plug inside the
box to J9 or J10. This will require removal of the two screws
holding the lid on. After plugging in the communications cable,
route the cable to the right side with the other cables and put the
lid back on with the two screws.
Control
Location
Top
Figure 13. Controller Location (BTH or BTX models)
Removal of the top is not required, but it may be helpful to remove
the control box lid. Use a ladder to access the top of taller water
heaters.
Next locate the upper temperature probe and exhaust switch.
Position the module between the two about 1 inch from the central
burner opening. For the 500 MBTUH Model this would be next to
the upper temperature probe.
Figure 14. Location of Exhaust Switch and Upper Temperature Probe
Connect the three wires from the end of the communication cable
to the module in Accordance with page 4. Once the unit is
installed and connected, the building management system can be
connected to the appropriate connection point on the module.
Figure 15. Clearance of ICC Unit from Central Burner Opening
COMMERCIAL ELECTRIC WATER HEATER (TOUCH SCREEN
INSTALLATION)
Normally the commercial electric heaters have a display with
membrane switches, but may have had a replacement touch
screen or future models may one day include touch screens. If
this heater has membrane switches on the bottom and right of the
display, then see the section below COMMERCIAL ELECTRIC
WATER HEATER INSTALLATION.
Follow directions under general guidance for connecting module
to the Energy Management System and power. This section will
guide the installer on how to mount and connect the module to the
water heater.
The module should be located where it will not interfere with the
door or in a location that is acceptable to the customer. Care
should be exercised to avoid drilling the self-tapping screws into
electrical or sensitive components. Electrical power should be
disconnected before proceeding with ICC installation.
Using a flat blade screwdriver, loosen the screws holding the door
of the unit. See Figure B1. Swing the door to the open position
and locate the control board.
Figure 16. Opening the Control Board Compartment Door
Locate the module on the top of the door cabinet approximately 1
inch from the water heater jacket and on the centerline of the unit
(See
Figure 17
and
Figure 18
).