Lennox G43UF SERIES

1. Confirm proper ail1low across roll using figure 13.
START. Measure (lllldoor O1mblenl lr.rnp':'I·i\IUl e
2. Compar9 unll pressures with lable 4, Normlll
Operating Pf$ssuras.
3. Sel lhetm08lBt to call1br hQat (must have a OOORne
USE WEIGH·IN METHOD load belWaetl 7(}-60"f (21·26"C).
Weigh-In or remove refriger-
4. CoMeC\ gauge sel.
ant based upon line length
5. When hellt demand Is salisned, set thermostat to
clIlI 'or cooling.
6. AIIl1W temperaturas and pressures to stabiliZe.
APPROACH TXV
7. Record outdoor amb/llnt lamperalure:
AMBo .. _
8. Record liquid line temperature:
L1Q":r _
9. Subtract 10 determine apptQach (AP?"):
LIQ" __ • AMO
D
__ ., APP" __
r
10. Campara resu!\s with table below,
SCD (Subcoollng) Value. (F:+1.1.0· [C: +/~.6D])
13ACX-XXX·230·0 1
OF (DCI' -018 -024 .030 -038 -042 -048
-060
Any 8 (44) B (44 9 (:j Q) 1518 3) 10 (5 6) 6(33)
9 (501
DTemperalure o( air enlering ouldCOt'" QOiI
13ACX·XXX.230·02, and -04 through .014
OF (OC)" -018 _ Q24 .030 -036 .042
-048
-080
An.Y- 4 (2 2) e (4,4) B (H) 11 (6 1) 9 (5 0)
8 (4 41
9
(5.Oj
'Temperature of air entering outdoor 0011
13ACX,XXX·230-D3
Any
°E..(°Cl·
4(22)
-018
7(39)
-024
8(44)
.030
10(56)
.036
7(291
-042
4(22)
.048
7 (39)
-060
DTemporuture of air entering ouldCOt'" ctlil
If refTIg9rant is lidded
or remol/ed, re186\ to
QOnfinn that unit I,
propQrly charged.
If vlllue Is graalllr then
shown (high approach),
add ra'r1gerllnt; if less
than shown (liquid
Iarnparaluretoo
close to
8mblllni Iemperalure.
low approach), remove ~
refrigeranl. ....--
Figure 16. HFC·410A Approach TXV Charge
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