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Quest 185 Cool
Installation, Operation and Maintenance Instructions
14
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LINE SET INSTALLATION
WARNING!
POLYOL ESTER (POE) OILS USED WITH HFC-410A REFRIGERANT ABSORB MOISTURE VERY QUICK-
LY. IT IS VERY IMPORTANT THAT THE REFRIGERANT SYSTEM BE KEPT CLOSED AS MUCH AS POS-
SIBLE. DO NOT REMOVE LINE SET CAPS OR SERVICE VALVE STUB CAPS UNTIL YOU ARE READY TO
MAKE CONNECTIONS.
Brazing the Line Set
WARNING!
WHEN USING A HIGH PRESSURE GAS SUCH AS DRY NITROGEN TO PRESSURIZE A
REFRIGERATION OR AIR CONDITIONING SYSTEM, USE A REGULATOR THAT CAN CONTROL THE
PRESSURE DOWN TO 1 OR 2 PSIG.
CAUTION!
BRAZING ALLOYS AND FLUX CONTAIN MATERIALS WHICH ARE HAZARDOUS TO YOUR HEALTH.
AVOID BREATHING VAPORS OR FUMES FROM BRAZING OPERATIONS. PERFORM OPERATIONS
ONLY IN WELL-VENTILATED AREAS. WEAR GLOVES AND PROTECTIVE GOGGLES OR FACE
SHIELD TO PROTECT AGAINST BURNS. WASH HANDS WITH SOAP AND WATER
AFTER HANDLING BRAZING ALLOYS AND FLUX.
TO PREVENT STRIPPING OF THE VARIOUS CAPS USED, THE APPROPRIATELY SIZED WRENCH
SHOULD BE USED AND FITTED SNUGLY OVER THE CAP BEFORE TIGHTENING.
ALLOW BRAZE JOINT TO COOL BEFORE REMOVING THE WET RAG FROM THE SERVICE VALVE.
TEMPERATURES ABOVE 250
0
CAN DAMAGE VALVE SEALS.
USE SILVER ALLOY BRAZING RODS WITH 5% MINIMUM SILVER ALLOY FOR COPPER-TO-
COPPER BRAZING. USE 45% MINIMUM SILVER ALLOY FOR COPPER-TO-BRASS AND
COPPER-TO-STEEL BRAZING.
WARNING!
FIRE, EXPLOSION AND PERSONAL SAFETY HAZARD. FAILURE TO FOLLOW THIS WARNING
COULD RESULT IN DAMAGE, PERSONAL INJURY OR DEATH. NEVER USE OXYGEN TO
PRESSURIZE OR PURGE REFRIGERATION LINES. OXYGEN WHEN EXPOSED TO A SPARK OR
OPEN FLAME, CAN CAUSE FIRE AND/OR AN EXPLOSION, THAT COULD RESULT IN PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
Note: There is a service port inside the dehumidifier (on the gas line) and both stub tubes of condensing unit. These service
ports can be used to introduce and release nitrogen during brazing.
