Teco US TECO RA - Manual

TECO Coolant Re-Charge Instructions
RA-200, RA-240, RA680, RA2000, TR5, TR10, TR15, TR20, TR30 & TR60
1) Remove Chiller Top Cover.
2) Determine if the system is completely discharged by unscrewing the Schrader valve
cap and press the pin inside. (See Picture.1).
3) Properly and completely discharge the line though the Schrader valve and follow
the steps below.
a.) You will need to replace the inline filter. To remove the filter, cut the capillary
pipe at the end of the filter-heat the filter at the joint and remove the old
filter.(See Pict. 2)
b.) The new filter will be welded with the copper pipe and with the capillary pipe.
When reattaching the capillary pipe inside the filter do not slide the capillary
pipe more than 5 mm. Weld (Solder) the capillary pipe. (See Pict. 3)
Note: TR30 and TR60 owners do not have an inline filter so you can go
directly to step 4. (See Pict. 8)
c.) TR5-TR10-TR15-TR20 owner can go to step 4..
d.) RA owners must cut dead-end pipe that exits from compressor and insert a
Schrader valve to charge their chillers (See Pict.4 and Pict.5).
Note: when this valve is welded, unscrew the pin inside with cap because the
heat will break the small components inside.
4) Voiding (vacuum) the System.
Connect vacuum pump to Schrader valve and let it vacuum for about 30-45
minutes.
Note: Install a valve between the vacuum pump and Schrader valve (for ex. Tap
valve) in order to prevent air suction when vacuum pump is disconnected. (See
Pict.6 and Pict.7)
5) When the void (vacuum) is complete, close the tap valve, disconnect the vacuum
pump. Attach the refrigerant gas cylinder. Place the gas cylinder on an accurate
scale and write down the cylinder weight.
6) Read gas in grams on compressor/chiller label and then open the tap valve to fill
the compressor. Charge until the proper weight has exited the cylinder and close
the tap valve.
Chiller Model Coolant Requirement:
TR5 --> 135g of R134a
TR10 --> 185g of R134a
TR15 --> 195g of R134a
TR20 --> 195g of R134a
TR30 --> 430g of R22
TR60 --> 585g of R22
7) Disconnect all pipes and put the cap on the Schrader valve.