Manitowoc Ice QF0400, QF2300, QF0800 Installation Instructions, Section, 2-16, Torque Value’s

Installation Instructions Section 2

Verify O-ring in schrader valve caps are intact and reinstall on shut off valves to prevent refrigerant leakage. Replace shut off valve access caps and torque to the following specifications.

Torque Value’s

Stem	18-20 ft. lbs.
Caps	12-15 ft. lbs.
Schrader Core	1.5-3 in. lbs.

Replace cap on receiver service valve and tighten.

TURN

COUNTERCLOCKWISE

RECEIVER SERVICE VALVE CAP
(TURN COUNTERCLOCKWISE
TO REMOVE)	SV1756

Open Receiver Service Valve

There is a liquid line solenoid valve at the outlet of the receiver; refrigerant will not flow to the condensing unit until the ice machine head section is started. Connect power to both the ice machine head section and the Remote condensing unit. Place the ICE/OFF/CLEAN toggle switch into the ICE position, this will allow refrigerant to enter the line set and condensing unit.

Important

All refrigeration valve caps must be reinstalled to prevent future refrigeration leaks.

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 remote 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 remote 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 70% Relative Humidity. If higher humidity is expected, increase insulation thickness.

The entire line set, including the suction service valve located on the back of the ice machine requires:

Suction Line	Liquid Line	Min. Insulation
		Thickness
		1/2”(13mm)
3/4 inch	1/2 inch	Suction Line
(19.1 mm)	(12.7 mm)	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 70% humidity and 90°F (32.2°C) ambient. When higher humidity will be experienced, insulation wall thickness will need to be increased.

2-16 Revised 8/2003 Part No. 80-1214-3