&,*
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
! !!
! ! !!
! $
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! ! !!
! $
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! ! !!
! $
! !!
! ! !!
! $
HP22 SERIES UNITS
TYPICAL DEFROST TIMINGS
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
"!
% !
% !
" % !
"!
! ! !!
#! "!
"! "!
"! " % !
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.
! ! !!
" !
! !
%
! ! !!
" !
! !
%
FIGURE 12
IV-REFRIGERANT SYSTEM
A-Plumbing
.*/) 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
MODEL NO.
LIQUID VAPOR L10
LINE LINE LINE SETS
.1 .1
+7 +7
.1 .1
+7 +7
.1 .1
+7 +7
TABLE 4
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