14
14 SEER SPLIT SYSTEM HEAT PUMP ORIFICE USAGE
Defrost Test Procedure for 624656
1. Jumper “T2” to “DFT” at the test terminals.
2. With unit running in heat mode, short the
“TEST” terminal to the common terminal near
it. This will speed up the board and cause
it to enter defrost mode in 5/10/15 seconds
depending on the defrost time selection.
Compressor delay will not function during
speed-up.
3. This test will end in 5 seconds if the “TEST”-
common short is not removed.
4. Remove both the short and the “T2” to “DFT”
jumper to terminate the defrost cycle. The
30 second compressor delay should operate
normally.
5. Test is complete, reset thermostat to home
owner preference.
Optional Equipment — A functional checkout
should be performed in accordance with
the checkout procedures supplied with the
equipment.
Adjustment of Refrigerant Charge:
CAUTION:
Split system heat pump equipment
c o n t a i n s l i q u i d a n d g a s e o u s
refrigerant under pressure. Adjustment
of refrigerant charge should only
be attempted by qualified, trained
personnel thoroughly familiar with the
equipment. Under no circumstances
should the homeowner attempt to
install and/or service this equipment.
Failure to comply with this warning
could result in equipment damage,
personal injury, or death.
NOTE: The following Refrigerant Charging
Charts are applicable to listed assemblies of
equipment and at listed airflows for the indoor
coil. Assemblies of indoor coils and outdoor units
not listed are not recommended.
Model
Number *T4BE
Restrictor Bore Size (in.)
System Charge
R-410A (oz.)
Outdoor
018K
.037
166
024K
.041
166
030K
.041
168
036K
.055
174
042K
.055
256
048K
.062
246
060K
.067
230
NOTE: Indoor refrigerant metering device is TXV for all models.
