General Maintenance - Boreal W-Series Installation And Service Manual

Hydronic geothermal heat pumps two-stage r410a

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Table Of Contents

Table of Contents

Item

Contactor

Heat exchanger

*Generally not required for closed loop systems. Whenever system performance is reduced for open loop.

COAXIAL HEAT EXCHANGER FLUSHING PROCEDURE—GROUNDWATER

STEP 1

Isolate the heat exchanger by closing the valves in the IN and OUT ports to the heat exchanger.

STEP 2

Blow out the heat exchanger into a clean 5 gallon bucket using compressed air.

STEP 3

If a purge cart is not available, use a 5 gallon plastic bucket, a circulator and some plastic piping to create a

makeshift pump system. Connect a the inlet and outlet to the heat exchanger ports.*

STEP 4

Place 2 gallons of RYDLYME in the purge cart (or bucket). Circulate the fluid through the heat exchanger

for at least 2 hours (3 recommended).

STEP 5

Disconnect the purge system dispose of the solution. RYDLYME is non-toxic and biodegradable and as

such can be poured down a drain.

STEP 6

Connect fresh water and a drain to the heat exchanger ports and flush the exchanger for several minutes.

STEP 7

Return the plumbing to its original configuration and open the IN and OUT valves. Operate the system and

check for improved performance.

*Depending on the plumbing, there should be either unions or boiler drains for to access the heat exchanger.

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.

STEP 6

Connect fresh water and a drain to the pump module purge ports and flush the exchanger for several min-

utes.

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.

*Depending on the plumbing, there should be either unions or boiler drains for to access the heat exchanger.

Boreal Geothermal Inc.