MORTEX Suntherm Single Piece Air Handler Instructions

SINGLE PIECE AIR HANDLER
INSTALLATION INSTRUCTIONS

Suntherm Single Piece Air Handler

Field Installed Thermal Expansion Valve Kit Non-Bleed.

INTRODUCTION:

Thermal expansion valve (TXV) can be used on both heat pump and air conditioning applications. All TXV’s have a built in check valve making them heat pump capable. All are externally equalized with non-adjustable superheat and are available with 15% bleed construction. Hard start capability for outdoor units is not normally required when 15% bleed valve is used. The external equalizer line attached to the TXV has a female flare nut with built in Schrader valve depressor that attaches to the Schrader valve port provided on coils.

APPLICATION DATA:

R72DB0005 (R-22) 15% Bleed 1.5-3.0 tons
R72DB0003 (R-410A)
Outlet male Rotalock. Outlet female swivel nut.
R72DB0006 (R-22) 15% Bleed 3.0-5.0 tons
R72DB0004 (R-410A)
Outlet male Rotalock. Outlet female swivel nut.
INSTALLATION NOTES:
With reference to the figure at right, the TXV assembly is to be installed between the flowrator distributor and the existing liquid line attached to the flowrator distributor. WARNING:
Coil is pressurized with nitrogen. Relieve pressure before installing TXV by depressing Schrader valve on coil manifold.

INSTALLATION STEPS:

1. After coil pressure has been relieved, turn the female swivel nut counter-clockwise to remove. 2.

2. Remove the piston from the flowrator distributor fitting using a small diameter wire or paper clip. ALWAYS REMOVE PISTON FROM DISTRIBUTOR BODY WHEN TXV IS INSTALLED).

3. Attach the TXV by connecting the female swivel nut on TXV outlet to the flowrator distributor (aligning Teflon seal first) and torque swivel nut to 10-30 ft. lbs.

4. Attach liquid line with female swivel nut to male rotalock fitting on TXV inlet (Aligning Teflon seal first) and torque swivel nut to 10-30 ft. lbs.

5. Remove the cap on Schrader valve port on coil manifold. Attach equalizer tubing with ¼” female flare nut that includes depressor to this male Schrader port. Torque nut to 10-30 ft. lb.

6. Install the TXV bulb to the suction manifold of coil or the suction line using the two bulb clamps furnished with kit.
   a. Bulb should be installed on a horizontal run of the manifold if possible. On line less than 7/8” OD the bulb may be installed on top of the line.
   With 7/8” OD and over, the bulb should be installed in a position at about 4 or 8 o’clock.
   b. If bulb installation is made on a vertical run, the bulb should be located at least 6 inches from any bend, and on the tubing side opposite the plane of the bend. On vertical bulb installations, the bulb should be positioned with the bulb capillary tube at the top.
   c. The bulb should be insulated using thermal insulation to protect it from the effect of the surrounding ambient temperature.

7. After completing installation of TXV (including equalizer tube), it will be necessary to leak check the coil and evacuate the coil through the service access fittings of liquid and suction line valves.

MS-Installation Instructions 052209-8

MORTEX PRODUCTS, INC.
501 TERMINAL ROAD
FORT WORTH, TEXAS 76106
Phone817-624-0820
Fax817-624-8581

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