Installation guide

INST ALLATION INSTRUCTIONS R- 410A Split System Air Conditioner
421 01 1702 05 3
Specifications subject to change without notice.
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not leave system open to atmosphere any longer than
minimum required for installation. POE oil in compressor is
extremely susceptible to moisture absorption. Always keep
ends of tubing sealed during installation.
If ANY refrigerant tubing is buried, provide a 6 in. (152.4
mm) vertical rise at service valve. Refrigerant tubing
lengths up to 36 in. (914.4 mm) may be buried without
further special consideration. Do not bury lines more than
36 in. (914.4 mm).
Outdoor units may be connected to indoor section using
accessory tubing package or field- supplied refrigerant grade
tubing of correct size and condition. For tubing requirements
beyond 80 ft/24.38 m, substantial capacity and performance
losses can occur. Following the recommendations in the Long
Line Applications Guideline for Split- System Air Conditioners and
Heat Pumps will reduce these losses. Refer to Table 1 for
accessory requirements. Refer to Table 2 for field tubing
diameters.
There are no buried- line applications greater than 36 in. (914.4
mm).
If refrigerant tubes or indoor coil are exposed to atmosphere, they
must be evacuated to 500 microns to eliminate contamination and
moisture in the system.
Outdoor Unit Connected to Factory Approved Indoor
Unit
Outdoor unit contains correct system refrigerant charge for
operation with factory approved AHRI rated indoor unit when
connected by 15 ft. (4.57 m) of field- supplied or
factory- accessory tubing, and factory supplied filter drier. Check
refrigerant charge for maximum efficiency.
Table 1 - Accessory Usage
Accessory
REQUIRED FOR LOW AMBIENT
COOLING APPLICA T IONS
(Below 55F / 12.8C)
REQUIRED FOR LONG LINE
APPLICATIONS* (Over 80 ft. / 24.38 m)
Required for Sea Coast Applica-
tion (within 2 miles/3.22 km)
Crankcase Heater Yes Standard on some units Yes, standard on some units No
Compressor Start Assist Ca-
pacitor and Relay
No No No
Liquid Line Solenoid Valve No See Long Line Applications Guideline No
Support Feet Recommended No Recommended
Hard Shutoff TXV
Yes (Standard with factory approved
indoor unit)
Yes (Standard with factory approved in-
door unit)
Yes (Standard with factory ap-
proved indoor unit)
Evaporator Freeze Thermostat Yes No No
Low-Ambient Pressure Switch Yes No No
Winter Start Control Yes No No
* For tubing line sets between 80 and 200 ft. (24.38 and 60.96 m) and/or 20 ft. (6.09 m) vertical differential, refer to Long Line Applications Guideline.
Table 2 - Refrigerant Connections and Recommended Liquid and Vapor Tube Diameters (In.)
UNIT SIZE
LIQUID
RATED VAPOR
up to 80 ft. (24.38 m)*
Connection and Tube
Diameter
Connection
Diameter
Rated Tube
Diameter
*CA724 3/8 3/4 3/4
*CA736 3/8 7/8 7/8
*CA748 3/8 7/8 1- 1/8
*CA760 3/8 7/8 1- 1/8
* Units are rated with 25 ft. (7.6 m) of lineset. See Specification sheet for performance data when using different size and length linesets.
Notes:
1. Do not apply capillary tube or fixed orifice indoor coils to these units.
2. For Tubi ng Set lengths between 80 and 200 ft. (24.38 and 60.96 m) horizontal or 35 ft. (10.7 m) vertical differential 250 ft. (76.2 m) Total Equivalent Length), refer to the Long
Line Applications Guideline.
Install Liquid Line Filter Drier Indoor
CAUTION
!
UNIT DAMAGE HAZARD
Failure to follow this c aution may result in equipment
damage or improper operation.
Installation of filter drier in liquid line is required.
Filter drier must be wrapped in a heat - sinking material
such as a wet cloth while brazing.
Refer to Fig. 3 and install filter drier as follows:
1. Braze 5 in. (127 mm) liquid tube to the indoor coil.
2. Wrap filter drier with damp cloth.
3. Braze filter drier to above 5 in. (127 mm) liquid tube. Flow
arrow must point towards indoor coil.
4. Connect and braze liquid refrigerant tube to the filter drier.
Figure 3
Liquid Line Filter Drier
Refrigerant Tubing Connection Outdoor
Connect vapor and liquid tubes to fittings on vapor and liquid
service valves (see Table 2.) Use refrigerant grade tubing.