Manitowoc QD0672C Specifications download pdf (Page 28)

Installation Instructions Section 2

2-18

Part No. 80-1175-3, 6/03

Step 7 Leak Check The Refrigeration System

Leak check the new line set connections at the ice

machine head section, condensing unit and S trap as

well as all factory joints throughout the entire system.

Disconnect power to the CVD condensing unit. Place the

ICE/OFF/CLEAN toggle switch into the ICE position.

This allows the low side and high side pressures to

equalize. Place the ICE/OFF/CLEAN toggle switch in the

OFF position. Connect power to the CVD condensing

unit and allow system to pump down.

Step 8 Insulation Requirements

To prevent condensation the entire suction line including

the shut-off valve must be insulated. All insulation must

be airtight and sealed at both ends.

The following insulation requirements prevent

condensation at 90°F (32.2°C) ambient 90% Relative

Humidity. If higher humidity is expected, increase

insulation thickness.

The entire suction line set, including the suction service

valve located on the back of the ice machine requires:

Suction Shut Off Valve Insulation

The pre-formed suction shut-off valve insulation is

located in the plastic bag taped to the water curtain.

A. Verify valve and schrader caps are tightened to

specifications (see Step 6).

B. Place insulation over schrader valve cap and left

side of valve. Position the tab between the

mounting bracket and rear panel.

C. Fold insulation and hold against right hand side

of valve while securing with electrical tape. Seal

the line set insulation to the shut off valve

insulation with electrical tape.

Suction Line Liquid Line Min. Insulation

Thickness

3/4 inch

(19.1 mm)

1/2 inch

(12.7 mm)

1/2”(13mm)

Suction Line

1/4” (7mm)

Liquid Line

5/8 inch

(15.9 mm)

3/8 inch

(9.5 mm)

7/8 inch

(22.2 mm)

5/8 inch

(15.9 mm)

3/4” (19mm)

Suction Line

1/4” (7mm)

Liquid Line

Important

To prevent condensation the entire suction line

including the shut off valve must be insulated. All

insulation must be airtight and sealed at both ends.

The minimum requirements are for conditions at or

below 90% humidity and 90°F (32.2°C) ambient.

When higher humidity will be experienced, insulation

wall thickness will need to be increased.

PRE-FORMED

INSULATION

SV3084

TIGHTEN VALVE CAPS TO

SPECIFICATIONS

SV3085

PLACE TAB BETWEEN

VALVE BODY AND PANEL

SV3086

FOLD INSULATION OVER

RIGHT SIDE OF VALVE AND

SECURE WITH

ELECTRICAL TAPE

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Manitowoc QD0672C Specifications Page 28

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