Carrier 42qg24-h Manual

 
 
28
 
CONNECTING REFRIGERANT PIPING (Cont.)  
15.5    DESCRIPTION OF REFRIGERANT CONNECTIONS OF OUTDOOR UNIT.  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
15.6    DESCRIPTION OF REFRIGERANT CONNECTIONS  
     OF HI WALL INDOOR UNITS  
 
 
 
 
 
 
 
 
 
 
 
 
 
 
   
15.7    DESCRIPTION OF REFRIGERANT CONNECTIONS 
     OF REFERIGERANT PIPING LINES 
 
 
 
  
15.8    CUTTING AND FLARING TOOLS 
 
Make sure that have the required tools available before preparing refrigerant piping lines 
(1)  Suction flare valve....

 
 
29
Corrugated CuttingWrap Cutting 
 
CONNECTING REFRIGERANT PIPING LINES (Cont.) 
 
15-9 STEPS FOR PREPARING REFRIGERANT PIPING LINES BEFORE CONNECTIONS 
( IN CASE OF NOT USING THE OPTIONAL FACTORY REFRIGERANT PIPING LINES WITH THE FLARE NUTS ) 
 
 
 STEP (1): Cutting refrigerant piping  lines 
• Remove protective caps from copper pipe ends. 
• Position tube end downwards, cut the pipe to the 
required length with a pipe cutter. 
 
NOTE:  
• It is recommended to cut approx. 30→50 cm 
longer than the...

 
 
30
 
CONNECTING REFRIGERANT PIPING LINES (Cont.)  
STEPS FOR PREPARING REFRIGERANT PIPING LINES BEFORE CONNECTIONS (Cont.) 
 
 STEP (4): Mounting flare nuts on the              
       refrigerant piping lines
   
• Mount the suction flare nut on the other side of 
suction piping line. 
• Mount the liquid flare nut on the other side of 
liquid piping line.
  
 
 
 STEP (5): Flaring the Piping  
• Use flare tool to flare ends of both suction and 
liquid piping lines slide a flare nut on to the tube...

 
 
31
 
CONNECTING REFRIGERANT PIPING (Cont.) 
 
 15-10   STEPS FOR CONNECTING REFRIGERANT PIPING LINES TO INDOOR UNIT 
 
Connecting suction and liquid piping 
lines respectively with suction and 
liquid half unions of indoor unit. 
 
A.  Lubricate suction and liquid piping line end 
and the threads of the suction and liquid half 
unions of indoor unit with anti – freeze oil. 
This is effective for reducing gas leaks.   
  
B.  For proper connection, align the centers of 
suction union pipe and flare...

 
 
32
 
CONNECTING REFRIGERANT PIPING LINES (Cont.)  
15-12   AIR AND MOISTURE PURGE 
In some countries the law does not permit purging by blowing refrigerant through the lines.  
If this is the case, please refer to page (31) using the vacuum pump. 
 
 
(A) AIR PURGE USING REFRIGERANT  
    IN THE UNIT OUTDOOR UNIT 
Air and moisture in the refrigerant  
system have undesirable effects. 
They must be purged completely. 
The outdoor unit includes an extra  
50 grams of refrigerant for air purge....

 
 
33
 
CONNECTING REFRIGERANT PIPING LINES (Cont.)  
 AIR AND MOISTURE PURGE (Cont.) 
 
(B) AIR PURGE USING THE VACUUM PUMP  
1. Connect the gauge manifold and the vacuum pump. 
 
2. Open the low-pressure valve and close the high-
pressure valve of gauge manifold completely. 
 
3. Operate the vacuum pump during at least 20 minutes 
until the pressure reaches – 101Kpa   (-760mm Hg). 
 
4. Close the low-pressure valve of the gauge manifold 
and stop the vacuum pump operation.  
  (If the indicator of...

 
 
34
Unit on 
Cooling 
Wait about 
3 minutes 
3  3  1  
2  
 
CONNECTING REFRIGERANT PIPING LINES (Cont.) 
 
15-13  REFRIGERANT LEAK CHECK  
 
After connecting the refrigerant piping lines, with both 
outdoor and indoor units check the joints for leakage with 
electronic leak detector or soapy water.
 
 
 
15-14 INSULATING REFRIGERANT PIPING LINES 
To conserve energy and prevent wet floors due to 
condensation, the suction and liquid piping lines must be well 
insulated with a proper insulation...

 
 
35
 
16. CONNECTING CONDENSATE DRAIN LINE  
 
16-1  INSTRUCTIONS FOR CONNECTING CONDENSATE DRAIN LINE  
The condensate drain line (not supplied) for indoor unit must be made of PVC piping with an inside 
diameter of 5/8” (16 mm) and have suitable length for the chosen installation site. 
 
Instructions for connecting drain hose Possible outlet locations of condensate  
drain line from the indoor unit 
 
a.  The drain hose must be 
gradually inclined downwards 
 to the outside to ensure flow  
of...

 
 
36
 
17. CONNECTING ELECTRICAL WIRING 
 
17-1 ELECTRICAL WIRING BETWEEN ELECTRICAL POWER SUPPLY  
AND CIRCUIT BREAKER OF AIR CONDITIONER 
 
All electrical connections between electrical power supply and circuit breaker of air conditioner 
are the responsibility of the customer and must be done by a qualified electrical technician 
according to national electrical wiring regulations to avoid fire due to short-circuiting. 
  
(A) Operating Voltage 
  The operating voltage of electrical power supply...

 
 
37
 
CONNECTING ELECTRICAL WIRING (Cont.) 
 
17-2 ELECTRICAL WIRING BETWEEN INDOOR UNIT, OUTDOOR UNIT  
AND CIRCUIT BREAKER OF AIR CONDITIONER 
 
All electrical connections between the outdoor unit, indoor unit and circuit breaker are the 
responsibility of the qualified installer and must be done according to national electrical  
wiring regulations to avoid fire due to short circuiting.
 
 
-  Both of the outdoor and indoor units leave the factory with complete internal electrical wiring. 
  Do not...