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OUTDOOR FAN, BRACKET AND
TEMPERATURE COMPENSATION
THERMISTOR
TABLE 2
HP22 DUAL CAPACITOR RATING
Units
#" "
"
" !"
FIGURE 8
Terminal
MFD
VAC
K-Defrost Thermostat
I-Service Light Thermostat
// 81-76 %5) )48-33)( :-7, % 6)59-') /-+,7 7,)50267%7
02817)( 21 7,) '2035)6625 (-6',%5+) /-1) ",) 6:-7',
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J-Dual Capacitor
",) '2035)6625 %1( *%1 -1 %1(
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TABLE 3
SOLID STATE DEFROST TIMER
$ %!"
$ !#
$" %#
!#
$
DEFROST
CONTROL CMC
TIMINGS
$" $"#
INTERVAL BETWEEN
DEFROSTS WITH
JUMPER CONNECTED TO:
30 (T1)
60 (T2)
90 (T3)
DEFROST
TIME
"
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$ $"
#
#
#
#
CAUTION - DO NOT CONNECT TIMING JUMPER TO
EITHER `TST' PIN. `TST' PINS ARE USED ONLY DURĆ
ING A TEST AND MUST NOT CONNECT WITH ANY OF
THE TIMING PINS. CONTROL DAMAGE WILL REĆ
SULT.
WARNING - AVOID CONTACT WITH OTHĆ
ER CONTROL TERMINALS OR CONTROL
COMPONENTS.
FIGURE 9
$0- +65;963 +65;)15: ) :631, :;);- ;14-9 >01+0 :>1;+0-: )5
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65 ;0- +65;963: +19+<1; *6)9, '0-5 ;0- ,-.96:; ;0-946B
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69 415<;- ,-7-5,15/ 65 06> ;0- +65;963 1: 79-B
:-; ;1415/ :-8-<5+- . ;0- ,-.96:; ;0-946:;); 9-4)15:
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1: -5-9/1A-, )5, ,-.96:; *-/15:
NEEDLE-NOSE
PLIERS
WARNING - DO NOT CONNECT TIMĆ
ING JUMPER TO EITHER `TST' PIN.
Defrost Control Components
1- Timing Pins 30(T1), 60(T2), 90(T3)
)+0 6. ;0-:- 715: 796=1,-: ) ,1..-9-5; ;14-, 15;-9=)3
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TO CHANGE CONTROL TIMINGS:
$<95 6.. )33 76>-9 ;6 ;0- <51; ;6 )=61, ,)4)/15/ ;0- +19+<1;
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FIGURE 10
3- `24V' Terminal
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(67 7(03(5$785( 6(77,1*
851 21 32:(5 72 81,7
(( $%/( )25 &21752/ 7,0,1*6 ,1 # 02'(
( 685( 72 7851 2)) 32:(5 $1' 5(029( -803(5 :+(1 7(67
,6 &203/(7( 851 21 32:(5 $1' 5($'-867 7+(50267$7
$*(
HP22 SERIES UNITS
TYPICAL DEFROST TIMINGS
ÉÉÉ
ÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉ
ÉÉÉÉÉÉÉÉÉ
ÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉ
ÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉ
ÉÉÉ
ÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
ÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
Note - Control begins timing at 0 when defrost thermostat closes. Defrost is
terminated when defrost relay is de-energized. Anytime defrost thermostat
opens, defrost relay is immediately de-energized, defrost timer resets and
`HOLD' function stops.
NORMAL HEATING OPERATION:
DEFROST TERMINATED BY DEFROST THERMOSTAT
! !! ! ! !!
! $
! ! !!
#! "!
"!
! !! ! ! !!
! $
NORMAL HEATING OPERATION:
DEFROST TERMINATED BY TIME
"!
"!
NORMAL HEATING OPERATION
INTERRUPTED BY THERMOSTAT DEMAND: `HOLD' FUNCTION
! !! ! ! !!
! $
! ! !!
" ! ! ! %
% !
"! " % !
DEFROST PERIOD INTERRUPTED BY THERMOSTAT DEMAND:
`HOLD' FUNCTION
! !! ! ! !!
! $
ÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉ
ÉÉ ÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉ
! ! !!
" ! ! ! %
% !
"!
" % !
IV-REFRIGERANT SYSTEM
FIGURE 12
A-Plumbing
VAPOR
LINE
L10
LINE SETS
.1
.1
+7 +7
.1
.1
+7 +7
.1
.1
+7 +7
MODEL NO.
.*/) 5*+5.,*5&17 3.3.1, (216.676 2+ /.48.) &1) 9&325 /.1*6
+520 7-* 287)225 81.7 6:*&7 (211*(7.216 "6* *112;
6*5.*6 /.1* 6*76 &6 6-2:1 .1 7&'/* 25 +.*/) +&'5.(&7*)
5*+5.,*5&17 /.1*6 *+*5 72 7-* 3.3.1, 6*(7.21 2+ 7-* *112;
*59.(* "1.7 1+250&7.21 &18&/ " +25 3523>
*5 6.=* 7<3* &1) &33/.(&7.21 2+ +.*/)+&'5.(&7*) /.1*6
&,*
TABLE 4
LIQUID
LINE
).+)0 ;'1;+ '3* +=5'38/43 ;'1;+ '7+ :8+* /3 5'7'11+1 /3
9.+ 1/6:/* 1/3+ !.+ ).+)0 ;'1;+ /8 )148+* <.+3 9.+ :3/9 /8
/3 .+'9/3- 24*+ 94 ,47)+ 7+,7/-+7'39 9.74:-. 9.+ +=5'3?
8/43 ;'1;+ !.+ ).+)0 ;'1;+ /8 45+3 <.+3 9.+ :3/9 /8 /3
)441/3- 24*+
VAPOR LINE VALVE
## &
$ "!
## +5'7'9+ */8).'7-+ '3* 8:)9/43 8+7;/)+ 54798 '7+ 574?
;/*+* '9 9.+ )4257+8847 ,47 )433+)9/43 4, -':-+ 2'3?
/,41* *:7/3- ).'7-/3- 574)+*:7+ /-:7+8 '3* 8.4<
-':-+ 2'3/,41* )433+)9/438
"
" !
# ## !&
! B-Service Valves
!.+ 1/6:/* 1/3+ '3* ;'547 1/3+ 8+7;/)+ ;'1;+8 '3* -':-+
54798 '7+ '))+88/(1+ 43 9.+ /38/*+ 4, 9.+ :3/9 !.+ 43+
8.49 ;'547 1/3+ 8+7;/)+ ;'1;+ ,/-:7+ )'3349 (+ )148+*
43)+ /9 .'8 (++3 45+3+* !.+8+ -':-+ 54798 '7+ :8+* ,47
1+'0 9+89/3- +;'):'9/3- ).'7-/3- '3* ).+)0/3- ).'7-+
8+5'7'9+ -':-+ 5479 /8 574;/*+* ,47 ).+)0/3- 9.+ 8:)?
9/43 57+88:7+ <.+3 9.+ :3/9 /8 /3 9.+ .+'9/3- )>)1+
## "
FIGURE 13
COOLING CYCLE
!
! !!
!
$! !
##
" % ##
# ##
"
# ##
"!
" ##
!!
$
% ##
! 774<8 /3*/)'9+ */7+)9/43 4, 7+,7/-+7'39 ,14< /3 )441/3- 24*+
FIGURE 14
'-+
HEATING CYCLE
!"#
#!"##
#!!!
&# #!
%%
$ #
'"
%%
!%!"
%%
"!
$!
%! %%
! $#
$ %%
!""!
#!#!
&
# 886=9 05+0*(:, +08,*:065 6- 8,-80.,8(5: -36= 05 /,(:05. 46+,
'" %%
FIGURE 15
CAUTION - When using dry nitrogen, a pressure reĆ
ducing regulator must be used to prevent excessive
#/, ;50: 09 -(*:68>*/(8.,+ =0:/ :/, (46;5: 6- !
8,@
pressure in gauge manifold, connecting hoses, and
-80.,8(5: 05+0*(:,+ 65 :/, ;50: 8(:05. 73(:, #/09 */(8., 09
within the system. Regulator setting must not exceed
)(9,+ 65 ( 4(:*/05. 05+668 *603 (5+ 6;:+668 *603 =0:/ (
150 psig (1034 kPa).
-66: 44 305, 9,: 68 <(8>05. 3,5.:/9 6- 305, 9,:
7,5 /0./ 78,99;8, <(3<, 65 .(;., 4(50-63+ (5+
8,-,8 :6 :()3, -68 8,-80.,8(5: */(8., (+1;9:4,5: )3(52
78,99;80?, 305, 9,: (5+ 05+668 *603 :6 790. 97(*, 09 786<0+,+ 65 :/, ;50: 8(:05. 73(:, :6 309: (*:;(3 -0,3+
2(
*/(8.,
/,*2 305,9 (5+ *655,*:0659 -68 3,(29
TABLE 5
NOTE - If electronic leak detector is used, add a
Ozs per ft. (ml per mm)
LINE SET DIAMETER
trace of refrigerant to the nitrogen for detection by the
adjust from 25 ft.
Vapor
Liquid
leak detector.
(7620mm) line set*
V-CHARGING
05
44
05
44
6;5*,
43
05
44
05
44
6;5*,
43
05
44
05
44
6;5*,
43
!,3,(9, 50:86.,5 78,99;8, -864 :/, 9>9:,4 *688,*:
(5> 3,(29 (5+ 8,*/,*2
B-Evacuating the System
* If line length is greater than 25 feet (7620 mm), add this
amount. If line length is less than 25 feet (7620 mm), subĆ
tract this amount.
::(*/ .(;., 4(50-63+ (9 9/6=5 05 -0.;8, 65@
5,*: <(*;;4 7;47 =0:/ <(*;;4 .(;., :6 *,5:,8
768: 6- .(;., 4(50-63+ &0:/ )6:/ 4(50-63+ 9,8<0*,
<(3<,9 67,5 9:(8: 7;47 (5+ ,<(*;(:, 05+668 *603
(5+ 8,-80.,8(5: 305,9
A-Leak Testing
::(*/ .(;., 4(50-63+ (5+ *655,*: ( +8;4 6- +8> 50@
:86.,5 :6 *,5:,8 768: 6- .(;., 4(50-63+
(.,
NOTE - A temperature vacuum gauge, mercury vacĆ
uum (U-tube), or thermocouple gauge should be
used. The usual Bourdon tube gauges are not accuĆ
rate enough in the vacuum range.
IMPORTANT - Compliant scroll compressors (as
with any refrigerant compressor) should never be
used to evacuate a refrigeration or air conditioning
system.
6!#5!4% 4(% 3934%- 4/ ).#(%3 -- 6!#55-
52).' 4(% %!2,9 34!'%3 /& %6!#5!4)/. )4 )3 $%3)2!",%
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)& 4(%2% )3 ! 2!0)$ ,/33 /& 6!#55- 2!0)$ ,/33 /& 6!#5<
5- 7/5,$ ).$)#!4% ! ,%!+ ). 4(% 3934%- !.$ ! 2%0%!4
/& 4(% ,%!+ 4%34).' 3%#4)/. 7/5,$ "% .%#%33!29
&4%2 3934%- (!3 "%%. %6!#5!4%$ 4/ ).#(%3
-- #,/3% '!5'% -!.)&/,$ 6!,6%3 4/ #%.4%2
0/24 34/0 6!#55- 05-0 !.$ $)3#/..%#4 &2/- '!5'%
-!.)&/,$ 44!#( !. 502)'(4 .)42/'%. $25- 4/ #%.4%2
0/24 /& '!5'% -!.)&/,$ !.$ /0%. $25- 6!,6% 3,)'(4,9
4/ 052'% ,).% !4 -!.)&/,$ 2%!+ 6!#55- ). 3934%7)4( .)42/'%. 02%3352% "9 /0%.).' -!.)&/,$ ()'(
02%3352% 6!,6% ,/3% -!.)&/,$ ()'( 02%3352% 6!,6%
4/ #%.4%2 0/24
,/3% .)42/'%. $25- 6!,6% !.$ $)3#/..%#4 &2/'!5'% -!.)&/,$ #%.4%2 0/24 %,%!3% .)42/'%. 02%3<
352% &2/- 3934%-
%#/..%#4 6!#55- 05-0 4/ '!5'% -!.)&/,$ #%.4%2
0/24 6!#5!4% 3934%- 4(2/5'( -!.)&/,$ 3%26)#%
6!,6%3 5.4), 6!#55- ). 3934%- $/%3 ./4 2)3% !"/6%
).#(%3 -- -%2#529 -- !"3/,54% 02%3<
352% 7)4(). ! -).54% 0%2)/$ !&4%2 34/00).' 6!#5<
5- 05-0
&4%2 %6!#5!4)/. )3 #/-0,%4% #,/3% -!.)&/,$ #%.4%2
0/24 !.$ #/..%#4 2%&2)'%2!.4 $25- 2%3352):% 393<
4%- 3,)'(4,9 7)4( 2%&2)'%2!.4 4/ "2%!+ 6!#55-
WARNING - DEEP VACUUM OPERATION CAN
CAUSE INTERNAL FUSITE ARCING RESULTING IN A
DAMAGED OR FAILED COMPRESSOR. THIS TYPE
OF DAMAGE WILL RESULT IN DENIAL OF WARRANĆ
TY CLAIMS.
C-Charging
(% 3934%- 3(/5,$ "% #(!2'%$ ). 4(% #//,).' #9#,% )&
7%!4(%2 #/.$)4)/.3 0%2-)4 (% &/,,/7).' 02/#%$52%3 !2%
).4%.$%$ !3 ! '%.%2!, '5)$% !.$ 3,)'(4 6!2)!4)/.3 ). 4%-<
0%2!452% !.$ 02%3352% 3(/5,$ "% %80%#4%$ !2'% 6!2)!<
4)/.3 -!9 ).$)#!4% ! .%%$ &/2 &524(%2 3%26)#).' ()3 02/<
#%$52% )3 &/2 #//,).' -/$% /.,9
TABLE 6
Model
Refrigerant Charge R-22
,"3 /:
,"3 /:
,"3 /:
,"3 /:
& 7%)'().' &!#),)4)%3 !2% ./4 !6!),!",% /2 )& 5.)4 )3 *534 ,/7
/. #(!2'% 4(% &/,,/7).' 02/#%$52%3 !00,9
BEFORE CHARGING
(steps 1 through 4)
NOTE - The following procedures require accurate readĆ
ings of ambient (outdoor) temperature, liquid temperaĆ
ture and liquid pressure for proper charging. Use a therĆ
mometer with accuracy of +2_F and a pressure gauge
with accuracy of +5PSIG.
/..%#4 '!5'% -!.)&/,$ !3 3(/7. ). &)'52% /.<
.%#4 !. 502)'(4 $25- 4/ #%.4%2 0/24 /& '!5'%
-!.)&/,$
%#/2$ /54$//2 !-")%.4 4%-0%2!452%
& ).$//2 4%-0%2!452% )3 "%,/7 _ 3%4 2//- 4(%2<
-/34!4 4/ _ _ ). ;-%2'%.#9 %!4 /2
;%!4 0/3)4)/. !.$ !,,/7 5.)4 4/ 25. 5.4), (%!4).' $%<
-!.$ )3 3!4)3&)%$ ()3 7),, #2%!4% 4(% .%#%33!29 ,/!$
&/2 02/0%2 #(!2').' /& 3934%- ). #//,).' #9#,%
(!.'% 4(%2-/34!4 3%44).' 4/ _ _ ). ;//,
0/3)4)/. ,,/7 5.)4 4/ 25. 5.4), 3934%- 02%3352%3 34!<
"),):%
(%#+ 4/ -!+% 352% 4(!4 4(%2-/-%4%2 7%,, )3 &),,%$
7)4( -).%2!, /), "%&/2% #(%#+).' ,)15)$ ,).% 4%-0%2!<
452%
& /54$//2 4%-0%2!452% )3 _ _ /2 !"/6%
0,!#% 4(%2-/-%4%2 ). 7%,, !.$ 2%!$ ,)15)$ ,).% 4%-<
0%2!452% )&&%2%.#% "%47%%. !-")%.4 !.$ ,)15)$ ,).%
4%-0%2!452%3 3(/5,$ -!4#( 6!,5%3 ')6%. ). 4!",% !002/!#( 4%-0%2!452% ,)15)$ ,).% 4%-0%2!452% -)<
.53 !-")%.4 4%-0%2!452% %&2)'%2!.4 -534 "% !$$<
%$ 4/ ,/7%2 !002/!#( 4%-0%2!452% %-/6% 2%&2)'%2<
!.4 &2/- 3934%- 4/ ).#2%!3% !002/!#( 4%-0%2!452%
& 4(% 3934%- )3 #/-0,%4%,9 6/)$ /& 2%&2)'%2!.4 4(% 2%#/-<
-%.$%$ !.$ -/34 !##52!4% -%4(/$ /& #(!2').' )3 4/
7%)'( 4(% 2%&2)'%2!.4 ).4/ 4(% 5.)4 !##/2$).' 4/ 4(% 4/4!,
!-/5.4 3(/7. /. 4(% 5.)4 .!-%0,!4% !.$ ). 4!",% %<
&%2 4/ 4(% %../8 %26)#% .)4 .&/2-!4)/. -!.5!, &/2
02/0%2 02/#%$52%
!'%
TABLE 7
APPROACH METHOD - EXPANSION VALVE SYSTEMS
Model
Liquid Temp Minus AmĆ
bient Temp. (_F)
- 5;:+558 :,36,8(:;8, 09 _ _ 58 ),25= (08
-25= =022 4,,+ :5 ), 8,9:80*:,+ :5 (*/0,<, 68,99;8,9 04
:/, 690. 8(4., $,, -0.;8, %/,9, /0./@
,8 68,99;8,9 (8, 4,*,99(8? -58 */,*104. :/, (6@
685(*/ :,36,8(:;8, 25*1 ,7;(2 9,*:0549 5- (08 04@
:(1, 6(4,29 35<04. 5)9:8;*:0549 90+,=(?9 (9
9/5=4 ;4:02 207;0+ 68,99;8, 09 04 :/, 690.
8(4.,
'/,4 ;40: 09 6856,82? */(8.,+ =/,:/,8 )? (6685(*/
58 9;)*55204. 3,:/5+ 207;0+ 204, 68,99;8,9 9/5;2+
(6685>03(:, :/59, .0<,4 04 :()2, BLOCKING OUTDOOR COIL
#,(+ 207;0+ 204, :,36,8(:;8, #,(+ 207;0+ 204, 68,9@
9;8, -853 .(;., (4+ *54<,8: :5 *54+,4904. :,36,8@
(:;8, ;904. 9:(4+(8+ # :,36,8(:;8, 68,99;8,
*54<,89054 */(8: %/, +0--,8,4*, ),:=,,4 :/, 207;0+
204, :,36,8(:;8, (4+ :/, *54<,89054 :,36,8(:;8, 09
:/, 9;)*55204. :,36,8(:;8, 9;)*55204.*54<,8@
9054 :,36,8(:;8, 304;9 207;0+ :,36,8(:;8, $;)@
*55204. 9/5;2+ (6685>03(:, <(2;,9 .0<,4 04 :()2, ++ 8,-80.,8(4: :5 04*8,(9, 9;)*55204. (4+ 8,35<,
8,-80.,8(4: :5 8,+;*, 9;)*55204.
TABLE 8
!&%!!# ! $!&
! ! $
% % '% #
!# !# "$%
$% & % "#!"#
%$% "#$$&#$
# #
#!# !#
"$% $%
FIGURE 16
SUBCOOLING METHOD - TXV SYSTEMS
Model
Subcooling (_F)
"
"
"
D-Oil Charge
%()2, 9/5=9 :/, -(*:58? 502 */(8., 04 " 9,80,9 ;40:9
TABLE 9
NORMAL OPERATING PRESSURES
HP22-261
MODE
!! % OUTDOOR COIL
ENTERING AIR
TEMPERATURE
HP22-311
HP22-411
HP22-461
LIQ.
+ 10
PSIG
SUC.
+5
PSIG
LIQ.
+ 10
PSIG
SUC.
+5
PSIG
LIQ.
+ 10
PSIG
SUC.
+5
PSIG
LIQ.
+ 10
PSIG
SUC.
+5
PSIG
_
_
_
_
_
_
_
_
" !" "(.,
$ !!# !
1- Clean coil if necessary.
At the beginning of each heating or cooling season, the
system should be cleaned as follows:
2- Check connecting lines, joints and coil for evidence
of oil leaks.
3- Check condensate line and clean if necessary.
$ %" $
!!# $
1- Clean and inspect outdoor coil. (Coil may be flushed
with a water hose.
2- Outdoor fan motor is prelubricated and ports are
sealed with plugs. No further lubrication is required.
Oiling ports can be accessed for lubrication after exĆ
tended operation by removing plugs. Be sure to seĆ
curely reseal after servicing.
3- Visually inspect all connecting lines, joints and coils
for evidence of oil leaks.
4- Check for correct voltage at unit (unit operating).
1- Clean or change filters.
2- Lubrication of blower motor: Use the following as a
guide:
a- Prelubricated and
sealed. No further lubrication required.
b- PrelubriĆ
cated for an extended period of operation. For exĆ
tended bearing life, relubricate with a few drops of
SAE 10 non-detergent oil once every two years.
It may be necessary to remove blower assembly
for access to oiling ports.
3- Adjust blower speed for cooling. The static pressure
drop over the coil should be checked to determine
the correct blower CFM. Refer to Lennox EngineerĆ
ing Handbook for Static Pressure and CFM tables.
5- Check all wiring for loose connections.
6- Check amp-draw on heat pump fan motor.
Unit nameplate_________Actual_________.
4- Check all wiring for loose connections.
5- Check for correct voltage at unit.
6- Check amp-draw on blower motor.
Unit nameplate_________Actual_________.
# REFER TO UNIT RATING PLATE FOR MAXIĆ
MUM CIRCUIT AMPACITY AND MAXIMUM
FUSE SIZE.
THERMOSTAT
A
L
R
M
E
X
VR
V
Y
F
R
W1
G
208-230/60/1
L2 L1
3 W2
COMPRESSOR
CONTACTOR
OUTDOOR UNIT
LOW VOLTAGE TERMINALS
R
M
Y
V
X
L
A
USE COPPER
CONDUCTOR ONLY
OUTDOOR
THERMOSTAT
(IF USED)
EM HEAT
RELAY
1
INDOOR UNIT JUNCTION BOX
LOW VOLTAGE FACTORY INSTALLED
LINE VOLTAGE FACTORY INSTALLED
LOW VOLTAGE FIELD INSTALLED
LOW VOLTAGE FACTORY INSTALLED
Page 14
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