4: Icm Installation; 5: Tubing & Sensor Installation-Below Roof - FAFCO 500 Series Installation Manual

STEP 1: MOUNTING ICM
The Integrated Circulation Module (ICM) is mounted directly onto the water heater
or solar storage tank sheet metal outer skin. Remove the ICM cover and place the
module against the water heater in a convenient location about 3" down from the top.
Using the three 2-1/2" self-tapping screws provided, attach through the mounting hole
at the top and the two at the bottom. Note: The two provided washers may be used
as spacers under the head of the top mounting screw, if you have less than one inch
of tank insulation.
STEP 2: ICM INLET PLUMBING
Note: If using Coaxial Adapter Conversion Kit, proceed to Appendix.
Apply thread sealant and install 3/4" tee in the upright position onto the cold water
port dielectric fitting on top of the water heater. Insert the screen filter, open end first,
into the 3/4" x 1/2" reducer. Apply thread sealant to reducer, and install into the side
of 3/4" tee as shown. Attach the 3' flexible hose to the reducer. Form the hose as
needed and attach to the ICM at the threaded metal fitting inside the ICM next to the
lower pump. Note: Flexible hose does not require thread sealant.
STEP 3: ICM OUTLET PLUMBING
Remove water heater drain bibb and save for reuse. Apply thread
sealant to the 3" nipple and install finger tight into side of 3/4" tee.
Install nipple and tee assembly into drain port at the bottom of the
water heater, stopping with tee oriented horizontally. Apply thread
sealant to water heater drain bib and install into tee on side most
convenient for future water heater flushing. Apply sealant and
install 3/4" x ½" reducer to remaining side of tee. Attach the 5'
flexible hose to the reducer. Attach the other end of the 5' flexible
hose to the threaded fitting on top of the ICM by carefully forming
hose so as to not apply a side load to the fitting. Note: Flexible
hose does not require thread sealant. All interconnecting hot wa-
ter piping shall be insulated with R-2.6 or greater insulation.
STEP 1: DRILL HOLES IN CEILING AND PULL LOWER ROOF JACK TUBING
Drill two 3/4" holes through the ceiling directly above the ICM, 4"
apart. Drill a 1/4" hole 2" behind the left hole. Place tape over the
end of the UV Resistant Solar Tubing and push up through the
hole on the right. In the attic, pull enough tubing through hole to
reach the lower roof jack. Remove the tape and lubricate tubing
with water or silicon. With a helper standing on the lower roof
jack, push about 18" of tubing up through the rubber grommet.
Penetrations shall maintain the function of the enclosure for code
required fire resistance and to prevent intrusion of insects and/or
vermin. Penetrations shall meet code and practices recommend-
ed by the National Roofing Contractors Assosiation.
5: Tubing & Sensor Installation—Below Roof

4: ICM Installation

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