Maritime Geothermal ATF-45, Installation And Service Manual

Page: 58 / 110

Page 58 002000MAN-01 1-Jun-2018
General Maintenance
GENERAL MAINTENANCE SCHEDULE
Item Interval Procedure
Air Filter
6 months Inspect for dirt. Replace if necessary.
Compressor Contactor 1 year Inspect for pitted or burned points. Replace if necessary.
Condensate Drain 1 year Inspect for clogs. Clean if necessary.
Heat exchanger As required* Clean as per HEAT EXCHANGER FLUSHING PROCEDURE below.
*Whenever system performance is reduced.
Outdoor Unit Weekly Inspect for and clear away debris or leaves in air coil intake, and ice buildup
under unit that is approaching air coil.
COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE - INDOOR LOOP
STEP 1 Isolate the heat exchanger by closing off Indoor IN and Indoor OUT in-line ball valves.
STEP 2 Connect a compressed air and a drain pipe to the Indoor IN and Indoor OUT hose bibs and blow the water
or anti-freeze solution into a clean 5 gallon bucket.
STEP 3 Connect a purge cart to the pump module purge ports.
STEP 4 Place 2 gallons of RYDLYME or similar lime-removing solution in the purge cart. Circulate the fluid through
the heat exchanger for at least 2 hours (3 recommended).
STEP 5 Disconnect the purge cart and dispose of the solution. RYDLYME is non-toxic and biodegradable and as
such can be poured down a drain. Clean the purge cart thoroughly.
* Depending on the plumbing, there should be either unions or boiler drains for to access the heat exchanger.
STEP 6 Connect fresh water and a drain to the pump module purge ports and flush the exchanger for several
minutes.
STEP 7 Blow the heat exchanger out with compressed air as per STEP 2 and dump the water down a drain.
STEP 8 Connect the purge cart to the pump module purge ports. Re-fill and purge the heat exchanger with as per
standard procedures (the anti-freeze from STEP 2 can be re-used).
STEP 9 Disconnect the purge cart and set the pump module valves back to the original positions.
STEP 10 Operate the system and check for improved performance.