Carrier NEOS 100S, Руководство по эксплуатации и обслуживанию

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5.2 INSTALLING MANIFOLD GAUGE SET
A manifold gauge/hose set with self-sealing hoses is
required for service of models covered within this manual.
The manifold gauge/hose set is available from Carrier
Transicold. (Carrier Transicold P/N 07-00294-00, which
includes items 1 through 6,
Figure 5.1 ). To perform ser-
vice using the manifold gauge/hose set, do the following:
5.2.1 Preparing Manifold Gauge/Hose Set For
Use
a. If the manifold gauge/hose set is new or was
exposed to the atmosphere it will need to be evac-
uated to remove contaminants and air as follows:
b. Back seat (turn counterclockwise) both field ser-
vice couplers (see Figure 5.1 ) and midseat both
hand valves.
c. Connect the yellow hose to a vacuum pump and
an R-134a cylinder.
d. Evacuate to 10 inHg (254 mmHg) and then
charge with R-134a to a slightly positive pres-
sure of 1.0 psig (0.07 Bar).
e. Front seat both manifold gauge set hand valves
and disconnect from cylinder. The gauge set is
now ready for use.
5.2.2 Connecting Manifold Gauge/Hose Set
To connect the manifold gauge/hose set for reading
pressures, do the following:
a. Connect low side field service coupler to the
suction access valve. (See Figure 5.1 .)
b. Turn the field service coupling knob clockwise,
which will open the system to the gauge set.
c. Read system pressures.
d. Repeat the procedure to connect the other side
of the gauge set to the discharge access valve.
Figure 5.1 Manifold Gauge Set (R-134a)
1. Manifold Gauge Set
2. Hose Fitting (0.5-16 Acme)
3. Refrigeration and/or Evacuation Hose (SAE J2196/
R-134a)
4. Hose Fitting w/O-ring (M14 x 1.5)
5. High Side Field Service Coupler
6. Low Side Field Service Coupler
- - - - -
5.2.3 Removing the Manifold Gauge Set
1. While the compressor is still ON, turn the high side field service coupler knob counter clockwise to close the
system to the gauge set.
2. Mid-seat both hand valves on the manifold gauge set and allow the pressure in the manifold gauge set to be
drawn down to low side pressure. This returns any liquid that may be in the high side hose to the system.
CAUTION
!
To prevent trapping liquid refrigerant in the manifold gauge set be sure set is brought to suc-
tion pressure before disconnecting.
3. Turn the low side valve counter clockwise. Remove the couplers from the access valves.
4. Install both access valve caps (finger tight only).
Opened
(Backseated )
Hand Valve
Closed
(Frontseated)
Hand Valve
To Low Side
Access Valve
To High Side
Access Valve
(Red Knob) (Blue Knob)
YELLOW
RED
BLUE
Low Pressure
Gauge
High Pressure
Gauge
1
2
2
3
3
4
4
5 6