Danfoss TR6 Data sheet

Data Sheet

Thermostatic Expansion Valves Type TR6

The TR6 series is a hermetic design which is developed with features especially for use in applications such as:

• Residential air conditioning systems

• Split systems

• Roof top units

• Heat pumps

• Chillers

• Light commercial air conditioning systems

The TR6 design incorporates a forged brass body with the entire power element, including the capillary tube and bulb, fabricated from stainless steel. All valves are designed with balanced port which reduces the inuence from varying condensing pressures. The valves can be delivered with special connections and ttings both at the inlet, outlet, and the equalizer connection.

AI318728845972en-000401

Thermostatic Expansion Valves, Type TR6

Features

• Compact size - hermetic design, straightway conguration with external equalization

• Refrigerants & rated capacities ranging up to

◦ R22/R407C: 23.6 kW / 6.7 TR ◦ R410A: 24.5 kW / 7 TR

• Laser-welded power element

◦ Longer diaphragm life ◦ High corrosion resistant

• Stainless steel capillary tube

◦ Tolerates more bending for easier installation and longer life ◦ High strength and vibration resistance

• Stainless steel bulb ◦ Self aligning

• Balance port design

• A complete program with and without internal check valve

• Internal check valve design with low pressure drop in reverse ow

• Adjustable or non-adjustable superheat, for customer specic factory setting

• Bleed function available

• Solder, chatle and aeroquip connections

• With external equalization

• UL listed, le SA7200

• Anti-hunt bulb charge

Danfoss

R64-1822.12

BCD

TR6 with / without internal

check valve

RD Distributor

Compressor

Outdoor coil

DCL/DML

Danfoss

R64-1823.13

ABCDEFGHRD Distributor

Indoor coil

TR6 with internal check valve

4-way valve

Compressor

DCB/DMB

TR6 with internal check valve

Outdoor coil

Thermostatic Expansion Valves, Type TR6

Application

Traditional air conditioning system, cooling only

Figure 1: Traditional air conditioning system, cooling only

Illustrates the diagram of a traditional air conditioning system where the TR6 is controlling liquid injection in one direction only.

Traditional air conditioning / heat pump system

Figure 2: Traditional air conditioning / heat pump system

Illustrates a split air conditioning / heat pump system with two thermostatic expansion valves, one for cooling mode and one for heating mode. The thermostatic expansion valves each has a built-in check valve, which has the function of preventing ow in one direction and allowing the ow in the opposite direction. It means that one thermostatic expansion valve is controlling liquid injection into the indoor coil while the other thermostatic expansion valve is bypassing the metering device with the open check valve.

Danfoss

R64-1824.13

ABCDEFRD Distributor

Indoor coil

TR6 without check valve

4-way valve

Compressor

Outdoor coil

Thermostatic Expansion Valves, Type TR6

Simplied air conditioning / heat pump system (bi-ow)

Figure 3: Simplied air conditioning / heat pump system (bi-ow)

Illustrates a packaged air conditioning / heat pump system with a short distance between the indoor and outdoor heat-exchangers. The two TR6 valves from g 6 can be replace by one TR6 valve without internal check valve, making use of the bi-ow feature of this thermostatic expansion valve. The single valve is controlling the liquid injection in both directions. The normal ow direction marked with an arrow on the valve body should be used for the primary function, i.e. cooling or heating.

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