Piping Works - Carrier 07KHP Installation Manual

PIPING WORK
REFRIGERANT PIPING
•
Use correct size and good condition field supply tubing of
refrigerant grade.
•
Run refrigerant tubes as straight as possible. Avoid
unnecessary turns and bends.
•
Suspend refrigerant tubes so that they do not transmit
vibration to structure.
•
Also when passing refrigerant tubes through wall, seal
opening so vibration is not transmitted to structure.
•
Leave some slack in refrigerant tubes between structure and
unit to absorb vibration.
•
NOTE: The longer the interconnecting piping, the lower the
cooling capacity of the unit. See table 2.
Table 2 Reduction in capacity vs increase in pipe length
EQUIVALENGHT PIPING LENGTH (ONE WAY
MODEL
07KHP 5m 10m
012 0 1.7%
018 0 1.6%
024 0 1.7%
040 0 1.8%
060 0 2.1%
090 0 2.5%
The permission piping for recommended combinations as per Table 3
and fig. 3.
Table 3 Vertical and horizontal separation between fan coil and
condensing unit.
MODEL MAX. DISTANCE, L
07KHP m (ft)
012 15 (50)
018 15 (50)
024 15 (50)
040 18 (60)
060 18 (60)
090 18 (60)
3
)
15m 20m 25m
2.7% 3.7% 4.8%
2.8% 3.8% 4.9%
3.0% 4.0% 5.4%
3.0% 4.2% 5.6%
3.8% 4.7% 5.9%
4.3% 5.2% 6.3%
MAX. LIFT, H m (ft)
CDU ABOVE CDU BELOW
FCU FCU
7.5 (25) 5.0 (16)
10 (33) 7.5 (25)
10 (33) 7.5 (25)
10 (33) 7.5 (25)
10 (33) 7.5 (25)
15 (50) 10 (33)
SIGHT GLASS AND FILTER DRIER
Sight glass and filter drier are factory supplied and field installed
applicable for model 07KHP036,048, 060 and 090 only. Warranty will be
voided if these models were not fitted with external filter drier in the field
installation.
TUBING CONNECTIONS AND LEAK TEST
•
Both suction and liquid are equipped with flare type
connections. (except for Model 090 uses sweat connection).
•
Assemble flare joint by aligning tubing with machine surface
of fitting. Start run onto threads by turning backwards first
then forwards.
•
All lines should be assembled with type "L" or quarter hard
drawn refrigeration grade copper tubing and not with copper
water pipe.
Use the following brazing alloys:
Copper to Copper -------------- 5% Silver Alloy (no flux)
Copper to Steel or Brass ---- 35% Silver Alloy (no flux)
•
Remove cap and Schrader core from service port to protect
seals from heat damage. Wrap service valve with wet rag
before applying heat. Flow dry nitrogen into a service port and
through the tubing while brazing to prevent pipe oxidation.
•
Pressurize line set and coil through service fittings with dry
nitrogen to 150 psig maximum (or refer to Carrier Standard
Service Techniques Manual, chapter 1, section 1-6) If a leak
is found, recover pressure and repair all leaks.
WARNING:
DO NOT USE OXYGEN TO PURGE LINES OR PRESSURE SYSTEM
FOR LEAK TEST. OXYGEN REACTS VIOLENTLY WITH OIL, WHICH
CAN CAUSE AN EXPLOSION RESULTING IN SEVERE PERSONAL
INJURY OR DEATH.
PIPING INSULATION
Insulate both suction and liquid lines as per Fig. 4
FIG. 4 PIPING INSULATION