Sanyo DE Insulation LE, Rupture disk mounting, Environmentally Friendly Technology

ENVIRONMENTALLY FRIENDLY TECHNOLOGY

Insulation (LE)

SUPER ABSORPTION

Rupture disk mounting

Figure 65. Insulation of LE

Generator cover Generator cover

In some instances local codes may dictate the use of a rupture disk to prevent damage to the chiller in the event of overpressurization of the high and low temperature generators. SANYO units are provided with a flange for mounting a rupture disk.

At this flange connection, a rupture disk may be installed and connected to a field-provided overflow tank per Figure 66.

It is the responsibility of the installing contractor to install the rupture disk on the units and overflow tank (if required) prior to initial chiller startup.

Figure 66. Piping of rupture disk

Discharge piping

Rupture disk mounting instructions are as follows:

1.Prior to installing or replacing the rupture disk, insure that a slight positive pressure is maintained in the chiller with nitrogen gas.

2.Apply Teflon paste to both sides of gasket.

3.Align gasket as shown in Figure 68.

4.Assemble flanges and torque per specifications shown in the manual of rupture disk.

5.Conduct leak test using nitrogen gas at 49 kPa (0.5 kg/cm2G) after installation of rupture disk.

6.Periodic maintenance should include tightening the rupture disk with a torque wrench.

Evaporator coverEvaporator cover

Don't insulate the motor, refrigerant pump and sight glass.

Evaporator cover and chamber cover are	30mm thick insulation for cold surface
removable in construction
75mm thick insulation for hot surface	30mm thick insulation for cold surface
50mm thick insulation for hot surface

Table 18. Insulation data

	Hot surface		Cold surface
	insulation(m2)		insulation(m2)
Model	75mm	30mm	50mm	30mm
LE-01	2.3	1.4	3.3	0.2
LE-02	2.3	1.4	3.3	0.2
LE-03	2.7	1.6	3.9	0.3
LE-11	2.8	1.6	4.0	0.3
LE-12	2.8	1.8	4.0	0.3

Rupture disk

Support

Vent piping

Tank

Above 35 QFT

: Scope of supply by SANYO

Drain

LE-13	3.8	1.9	5.5	0.3
LE-14	3.8	2.2	5.5	0.3
LE-21	4.0	2.5	6.1	0.4
LE-22	4.0	2.5	6.1	0.4
LE-23	5.2	3.1	7.6	0.5
LE-24	5.2	3.3	7.6	0.5
LE-31	6.0	3.5	8.5	0.5
LE-32	6.0	3.6	8.5	0.5
LE-41	6.6	3.7	9.9	0.5
LE-42	6.6	3.9	9.9	0.5
LE-51	7.6	4.8	13.8	0.7
LE-52	8.4	5.1	15.0	0.7

Figure 67. Fixing methed of rupture disk

High tension bolt

High tension nut

To tank

Pipe Cap screw

Flange

Teflon paste

Flange

Safety head

Rupture disk

Safety head

LE-53 9.2 5.3 16.1 0.7

Pipe

Gasket

Teflon paste

Notice :

1)Material : Glass wool or rock wool (non-combustible type)

2)The total area includes the area of pipes in the chiller.

3)The machine is coated with rust preventive paint before shipment, but is not provided with finish paint.

92

From chiller

Figure 68. Gasket

A

• Material : T/#9090-OR

4.5

3.2

CB

	4 inch	6 inch
	disk	disk
A	174.8	222.3
(mm)
B	149.4	209.6
(mm)
C	127.6	182.6
(mm)
			93