Metering Device - Trane A4MXA1824AC6HA Installer's Manual

Installer's Guide
I. METERING DEVICE
A4MX
1.5-4 ton coils include a factory installed orifice.
Orifice size may need to be changed depending on the equip-
ment match. See outdoor unit for more information.
A4MX
5-ton coils are supplied with an internally-checked,
non-bleed TXV designed for air conditioning or heat pump
operation. This factory supplied TXV is suitable for ton-
nages down to 3.5 tons. Some outdoor models may require a
start assist kit.
Factory Included Metering Device
COIL MODEL NOMINAL
TONS
A4MXA1824AC6HA 2
A4MXB1832AC6HA
A4MXA3036AC6HA 2.5
A4MXB3642AC6HA 3
A4MXC3642AC6HA
A4MXB4248AC6HA 3.5
A4MXC4248AC6HA 4
A4MXD4248AC6HA
A4MXC4260AC3HA* 5
A4MXD4260AC3HA*
* The TXV is the best option for these coils and does not require
a change regardless of outdoor model match.
Orifice change
Use the table below to determine if the factory installed
orifice needs to be changed.
Example. The A4MXC3642AC6HAA coil comes with a 0.068
orifice installed. If the coil is matched with a 3.5 ton outdoor
unit, the orifice needs to be replaced with the included 0.077
orifice.
Orifice Size Table
Outdoor Unit Indoor Unit
Capacity (Tons) Orifice Size
(R-410A) (a)
1.5 0.052
2 0.057
2.5 0.064
3 0.068
3.5 0.077
4 0.082
(a) Sizes are for both R-410A and R-22 refrigerants.
6
FACTORY ADDITIONAL
INSTALLED INCLUDED
ORIFICE ORIFICE
SIZE SIZES
0.057 0.052
0.052, 0.064
0.064 0.068
0.068 0.077
0.077
0.077 0.082
0.082 0.077
0.077
TXV none
none
Indoor Unit Fixed Orifice
Replacement Part Kit Number
BAYORIACHP0052
BAYORIACHP0057
BAYORIACHP0064
BAYORIACHP0068
BAYORIACHP0077
BAYORIACHP0082
Orifice change
The orifice is accessed by removing the front panel. Use a
back—up wrench when disconnecting the fitting. Remove
the old orifice using the wire tool supplied with the kit.
Install the new orifice and tighten fitting. Make sure to use
a back—up wrench when tightening fitting.
Note: The wire tool ships with the orifice replacement kits.
Note: This unit can be applied in both 410A and R22 appli-
cations when the correct fixed orifice is installed.
Note: Install the orifice
in the orientation
shown.
Accessory TXV Kit
Reference the 4AYTXVH4 accessory table for TXV replace-
ment kits. See TXV kit for installation instructions.
The following TXV kits are available as part of matched
systems in the AHRI directory for when improved system
ratings are required.
TXV and Coil Matches
Coil Model
A4MXA1824AC6HA
A4MXB1832AC6HA
A4MXA3036AC6HA
A4MXB3642AC6HA
A4MXC3642AC6HA
A4MXB4248AC6HA
A4MXC4248AC6HA
A4MXD4248AC6HA
A4MXC4260AC3HA
A4MXD4260AC3HA
Accessory TXV Kit Number
4AYTXVH4A1830A
4AYTXVH4A3042A
4AYTXVH4A4860A
18-AD37D1-1-EN