Carrier 24ANB7 - Accessories; Accessory Usage Guideline; Accessory Description and Usage (Listed Alphabetically); Support Feet

6
ACCESSORIES
ORDER NUMBER
DESCRIPTION 24--- 31 36--- 31 48 --- 31 60--- 31
KAACH2401AAA CRANKCASE HEATER X X S S
KSAHS2501AAA* HARD START KIT X X
KSAHS2801AAA* HARD START KIT X X
KAALS0201LLS SOLENOID VALVE X X X X
KSASF0101AAA SUPPORT FEET X X X X
x = Accessory S = Standard
* Not backward compatible to previous series.
ACCESSORY USAGE GUIDELINE
ACCESSORY
REQUIRED FOR
L O W --- A M B I E N T C O O L I N G
APPLICATIONS
(Below 55F/12.8_C)
REQUIRED FOR LONG LINE
APPLICATIONS*
REQUIRED FOR SEA C OAST
APPLICATIONS
(Within 2 miles/3.22 km)
Compressor Start Assist Kit No No No
Crankcase Heater
Ye s
(standard on some units)
Ye s
(standard on some units)
No
Evaporator Freeze Protection Standard with Infinity Control No No
Liquid--- Line Solenoid Valve No No No
Low---Ambient Control Standard with Infinity Control No No
Puron Refrigerant Balance Port Hard---
ShutOff TXV
Ye s{
Ye s{
Ye s{
Support Feet Recommended No Recommended
Winter Start Control Standard with Infinity Control No No
* For tubing set lengths between 80 a nd 200 f t. (24.38 and 60.96 m) h orizontal or 35 ft. (10.7 m) vertical differential (total equivalent length), refer to the Long
Line Guideline—Air Conditioners and Heat Pumps using Puron® Refrigerant.
{ Required on all indoor units. Standard on all new Puron refrigerant fan coils and furnace coils.
Accessory Description and Usage (Listed Alphabetically)
1. Compressor Start Assist -- Capacitor and Relay
Start capacitor and relay gives a ”hard” boost to compressor
motor at each start up.
Usage Guideline:
Not required on this unit since compressor always starts
unloaded.
Available if required by local codes.
2. Crankcase Heater
An electric resistance heater which mounts to the base of the
compressor to keep the lubricant warm during off cycles.
Improves compressor lubrication on restart and minimizes the
chance of liquid slugging.
Usage Guideline:
Required in low ambient cooling applications.
Required in long line applications.
Suggested in all commercial applications.
3. Support Feet
Four stick--on plastic feet that raise the unit 4 in. (101.6 mm)
above the mounting pad. This allows sand, dirt, and other debris
to be flushed from the unit base, minimizing corrosion.
Usage Guideline:
Suggested in the following applications:
Coastal installations.
Windy areas or where debris is normally circulating.
Rooftop installations.
For improved sound ratings.
4. Thermostatic Expansion Valve (TXV)
A modulating flow--control valve which meters refrigerant liquid
flow rate into the evaporator in response to the superheat of the
refrigerant gas leaving the evaporator.
Kit includes valve, adapter tubes, and external equalizer tube.
Hard shut off types are available.
NOTE: When using a hard shut off TXV with single phase
reciprocating compressors, a Compressor Start Assist Capacitor
and Relay is required.
Usage Guideline:
Required to achieve AHRI ratings in certain equipment
combinations. Refer to combination ratings.
Hard shut off TXV or LLS required in air conditioner
long line applications.
24ANB7**C