Tadano TT-800XXL1, Service Manual

Page: 176 / 267

K-2 K-2
Air Conditioner
23
W701-0160E
9.3 Check for gas leakage and amount of
refrigerant charge
[NOTICE]
Never check using a halide-torch type leak detector.
1. Insert refrigerant in gas form until the gauge
pressure reads 98.1 kPa (14.2 psi). Then use a
leak tester and check for leaks.
[NOTICE]
An excess or insufficient amount of refrigerant can
result in the following trouble.
Excess amount: Cooling trouble resulting from
operation of the pressure switch
Insufficient amount: Cooling trouble or malfunction
resulting from compressor lubrication failure
2. When the sight glass bubbles disappear, control
the refrigerant to +100 - 200 g.
(Conditions)
Doors :
Open
Blower : Hi
Engine speed : Idle
A/C switch : ON
Temp. control : Max. cool
9.4 Heated water circuit
1. When connecting the heated water piping, be
careful not to incorrectly assemble the IN and
OUT piping.
2. In order to prevent damage resulting from freezing
of the water inside the heated water circuit, in the
wintertime use antifreeze in a concentration
appropriate for the outside temperature.
3. The pressure which is applied to the heated water
circuit heater core is 196 kPa (28.4 psi) or less
when the circuit is in use. However the usual
pressure is 98 kPa (14.2 psi) or less.
9.5 Run-in operation
Operate the A/C for 5 minutes or more under the
conditions below to perform the initial run-in
operation.
Engine
speed :Idle
(High-speed starting is especially prohibited.)
Temp. control :Max. cool
Blower :Hi
9.6 Bolt size and tightening torque
Tightening torque
Bolt
N•m ft•lbf
Compressor installation 24.5 - 29.4 18.1 – 21.7
Idle pulley center bolt 31.4 - 47.1 23.2 – 34.7
IW701-0160E12
Sight glass
Refrigerant lack
(Bubbles are visible)
Proper amount of refrigerant