Economizer Blank; Removal And Installation; Torque Specifications; Table 10 - Economizer Torque Specifications - Danfoss Turbocor VTT Series Service Manual

3.2.6 Economizer Blank

Figure 32 - Economizer Blank

3.2.6.1 Removal and
Installation
3.2.6.2 Torque
Specifications
Table 10 - Economizer

Torque Specifications

42 of 165
M-SV-VT-001-EN Rev. A
Compressor Components
The Economizer Blank is used when the economizer option is not being utilized. This is also used
anytime the Compressor is removed from the chiller to prevent contamination ingress.
Economizer Blank Removal:
1. Isolate the Compressor power as described in the
section of this manual.
2. Isolate the Compressor and recover refrigerant.
3. Remove the four (4) Economizer screws.
Economizer Blank Installation:
1. Verify all contact surfaces are clean and dry. If not, clean with a lint-free cloth.
2. Lubricate the new O-ring and place it onto the Compressor housing O-ring groove.
3. Using the four (4) M16 screws, install the Economizer Blank. Finger-tighten and then tighten in a
crisscross pattern in two (2) stages.
• Stage 1: Tighten to 30 Nm (22 ft.lb.)
• Stage 2: Tighten to a final torque of 100 Nm (73 ft.lb.)
4. Leak test the Compressor to the appropriate pressure and industry standards.
5. Evacuate the Compressor to the appropriate pressure and industry accepted standards.
6. Charge the Compressor with refrigerant.
7. Restore power to the Compressor.
The same torque would apply if the Economizer option is used and a pipe flange is attached to the
Compressor.
Economizer, SHCS, M16x40
"Electrical Isolation of the Compressor/VFD"
NOTE
Description
Torque to 100 Nm (73
ft.lb.) (4 places)
Nm Ft.Lb. In.Lb.
100 73 -