Maritime Geothermal EMWT-65-HACW-P-1T, Инструкция по установке и обслуживанию

Страница: 23 / 44

01 MAR 2012 Page 23 000662MAN-03
GENERAL MAINTENANCE SCHEDULE
Item Interval Procedure
Contactor 1 year Inspect for pitted or burned points. Replace if necessary.
Heat exchangers As required* Clean as per HEAT EXHCANGER FLUSING PROCEDURE below.
*Generally not required for closed loop systems. Both exchangers have the same antifreeze mix in them.
Circulators
1 year Inspect for corrosion or leaks
Expansion Tank
1 year Inspect for corrosion or leaks, verify bladder pressure.
COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE—GROUND LOOP
STEP 1 Isolate the heat exchanger by placing the pump module valves in the exchanger flushing position.
STEP 2 Connect a compressed air and a drain pipe to the pump module purge ports and blow the anti-freeze solu-
tion 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 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.
General Maintenance
PURGING THE SYSTEM
There are several ball valves and boiler drain valves in the unit that can be used to help purge the system. The Electon-
ic Ball Valves (EBV) located near the bottom of the cold tank on the left side of the unit can be opened and closed manu-
ally as well to direct flow while purging. Adjust valves as necessary to purge each individual circuit in this unit. It can
take some time to completely flush the system particularly if there are several zones.
IMPORTANT NOTE: In order to properly purge the Cold Indoor Circulator (refer to Diagram B ) close the ball valve in
the bottom port of the cold tank and connect a supply line to the boiler drain next to it. This forces fluid through this loop,
it will not get purged otherwise. Ensure all ball valves are open once purging has been completed.