beautypg.com

Connecting the linesets, Caution – Reznor B6BM Unit Installation Manual User Manual

Page 9

background image

9

Connecting the Linesets

IMPORTANT NOTES FOR HORIZONTAL OR

DOWNFLOW INSTALLATIONS WITH TXV VALVE:

• The sensing bulb must be located flush against the

suction line for optimum heat transfer.

• Avoid attaching the sensing bulb to the lowest part of

the suction line where condensate may accumulate.

• Do not locate the sensing bulb on vertical sections

of the lineset.

• For horizontal lines, the bulb should not be located

at 12 or 6 o’clock position of the suction line. The

best location is at 4 or 8 o’clock.

• For additional information on proper sensing bulb

locations, please refer to the valve manufacturer’s

instructions.

IMPORTANT: The steps in the Orifice Removal &
Installation section (

page 8

) must be performed before

the linesets are connected.
1. Remove grommets from line set holes.

CAUTION:

It is recommended that a wet rag be wrapped

around the suction line in front of the close off

plate or the sensing bulb (if TXV is installed)

before applying heat. Failure to keep components

cool during brazing may result in structural

damage, premature equipment failure, or possible

personal injury.

2. Unbraze and remove the cap on the suction line.

3. Route and cut both lineset tubes to proper length in

accordance with the outdoor unit specifications. Verify

the ends are round, clean, and free of any burrs.

4. Position grommet on line set with sufficient distance away

from brazing area. Brazing processes can permanently

damage grommets.

5. Connect the suction and liquid lineset tubes.

CAUTION:

It is recommended that a wet rag be wrapped

around the suction line in front of the close off

plate or the sensing bulb (if TXV is installed)

before applying heat. Failure to keep components

cool during brazing may result in structural

damage, premature equipment failure, or possible

personal injury.

6. Braze the individual connections with dry nitrogen

flowing through the joints.

NOTE: This will prevent

internal oxidation and scaling from occurring.

7. Wrap the refrigerant lines with pressure sensitive

neoprene or other suitable material especially where

the lines enter the opening in the sheet metal.

Figure 6. Restrictor Insertion into Distributor Body

Figure 7. Removal of Orifice

7. Check the actual size of the new orifice.

NOTE: The

size is stamped on its side. Do not use pin gauges to

measure the orifice diameter.

8. Insert the new orifice into the distributor body, rounded

end down. See

Figure 7

.

CAUTION:

To prevent damage to the unit or internal

components, it is recommended that two

wrenches be used when loosening or tightening

nuts. Do not over tighten!

9. Realign the assembly nut on the distributor body and

hand tighten both components. Mark a line on both

bodies and then tighten an additional 1/4 turn using two

wrenches. The movement of the two lines will show how

much the nut is tightened. If a torque wrench is used,

tighten to 10-12 ft. lbs. or 14-16 Nm.