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SECTION 1 - INSTALLATION
FORM 145.18-IOM2
ISSUE DATE: 06/17/2020
1
LD23559
LD23560
FIGURE 21 -
POSITION BLACK COVER
3. If the black cover is loose, position it in place and
slide it back onto the actuator (see
).
4. Secure the red cover back over the actuator as-
sembly.
5. Ensure the plastic tabs are secured to the metal
body bracket.
6. Connect the quick-connect terminals, and insert
the damper assembly into the discharge collector
box.
7. Fasten the assembly using the seven fasteners.
SYSTEM FLUSHING AND CLEANING
After the piping system is complete, and before con-
necting the refrigeration chassis, flush and clean the
risers This ensures a proper start-up and continued ef-
ficient operation of the system (see
Flushing the System
1. Ensure the supply and return riser shut-off valves
are closed at each unit.
2. Fill the water circulation system with clean wa-
ter from the make-up water supply. Ensure the air
vents are open during initial filling. Do not allow
the system to overflow.
3. Ensure that all air is bled from the system by
cracking each air vent.
Make-up water must be available in suf-
ficient volume to replace the volume oc
-
cupied by the air that is bled off.
4. When all the air is vented and the water is circu-
lating under pressure, check the entire system for
leaks. Repair the leaks as required.
5. Raise the temperature to approximately 85.0°F
by setting the loop temperature controls. Visually
check for any leaks that may have occurred due to
the increased heat. Repair any leaks as required.
6. Open the drain at the lowest point in the system.
The make-up water flow rate must be
equal to the rate of the drain bleed.
7. Continue to bleed the system until the water leav-
ing the drain is clear, no less than 2 hours.
8. Completely drain the piping system.
