Carrier 38CQ Manuel d'utilisateur télécharger pdf (Page 7)

(

OD (liquid line), respectively, using refrigerant

weights shown in table below. (Twenty-five feet of

3/8-in. OD tubing contains 14.4 oz of R-22.) Add

R-22 charge to system if liquid line is over 25 ft;

remove charge if liquid line is shorter than 25 feet.

LIQUID LINE 1 OUNCES OF ^22/FT LENGTH

DIAM (in.) OF LIQUID LINE

3/8

5/16

1/4

Table 6 — Service Data

UNIT 38CQ

1 015,

1 020

027 033 039

044

048

R-22 CHG

]

(Ib-oz) 1 4-10 4-1 1 6-5 7-11 7-13 7-10

REFRIG CONTROL A ccuRater*^^

(Bypass Type

)

FAN 1 Prope

Her - Direct Drive

Cfm

2600

2800

2800 1 2600 3400

Rpm

1075

Diam (in.) 1 17

17 18 18 16 18

Motor Hp

1/8

1/4

1/4 1/4 1/4

1/2

When recharging is necessary during heating or

cooling season, weigh in total charge indicated in

Table 6. (Charge must be weighed in during heating

season.) Remove any refrigerant remaining in

system before recharging. If system has lost com

plete charge, evacuate system to 500 microns (29.7

in. vacuum) before recharging. Service port connec

tions are provided on liquid and suction line service

valves for evacuation and charging. (See Fig. 32 for

correct service port location on cooling and heating

cycles.) DiaTa-charge charging cylinder is an

accurate device used to recharge systems by

weight. These cylinders are available at refrig

eration supply firms.

To check and/or adjust charge during cooling

season, use correct Cooling Cycle Charging Chart

(Fig. 9, 11, 13, 15, 17, 19, 21,23, 25, 27, 29) and

follow Charging Chart Method below. The charging

chart may also be used as an alternate method of

recharging system.

To check system operation during heating

cycle, use correct Heating Cycle Operation Check

Chart (Fig. 10, 12, 14, 16, 18, 20, 22, 24, 26,28,

30). These charts indicate whether a correct

relationship exists between system operating pres

sures and air temperatures entering indoor and

outdoor units. If pressure and temperature lines do

not intersect on chart, the system refrigerant

charge may not be correct or other system abnor

malities may exist. Do not use Operation Check

Charts to adjust refrigerant charge. Weigh charge

into system.

a. 2 — Thermostat Assembly b. Capillary Tube Routing

^ Fig. 8 — Outdoor Thermostat Installation Details

1 2 3 4 5 6 7 8 9 10 11 12 ... 19 20

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Carrier 38CQ Manuel d'utilisateur Page 7

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