Carrier 38SE - Manual (Page 5)

THERMOSTAT SUBBASE
HH93AZ042 OR
HH93AZ040
r
ARRANGEMENT A-(COOLING ONLY)
THERMOSTAT SUBBASE
(COOLING AND ONE-STAGE HEATING)
* CONNECT FS TO LOW-SPEED INDOOR FAN TERMINAL
WHEN TWO-SPEED FAN IS USED
THERMOSTAT SUBBASE
HH93AZ076
N
0
&■
0
&-
@--
[vië
-LEAVE JUMPER ON
SUBBASE (RH TORO)
38SE. gr
TOIFM LINE
..0^ VOLTAGE
POWER
m SUPPLY
HCl
1TRANS
FURNACE
ARRANGEMENT C-ONE TRANSFORMER
(COOLING AND TWO-STAGE HEATING)
* CONNECT FS TO LOW-SPEED INDOOR FAN TERMINAL
WHEN TWO-SPEED FAN IS USED
I IFR.FSand IFM are located in furnace on heating-cooling
applications If accessory IFR is required for cooling only
applications, locate (IFR) in fan coil
LEGEND
CR — Control Relay (10 va)
Trans — Transformer
FS — Fan Switch SI Field Splice
HC — Heating Control
IFM — Indoor Fan Motor — Field Wiring
IFR — Indoor Fan Relay Factory Wiring
Fig. 3 — Control Circuit Connections
START-UP INSTRUCTIONS
Energize cranlscase heater a minimum of 24 hours before
starting unit. To energize heater only, turn the thermostat
to “Off’ position and close electrical disconnect to
condensing unit.
Start Procedure
1. Backseat (open) liquid and suction line service valves.
2. Set thermostat selector switch at “Off.”
3. Set room thermostat to desired temperature.
4. Close electrical disconnects energizing entire system.
5. Set room thermostat at “Cool” and fan switch as desired
(“Fan”) (“Auto.”). Unit will start in 4 to 6 minutes.
Operate unit for 15 minutes, then check system refrig­
erant charge. See Refrigerant Charging.
Motors and controls operate satisfactorily in a range
from 10% above to 10% below nominal unit voltage (Table
4)-
Do not connect charging hoses during initial start
procedure. (Loss of charge from this procedure may result
in capacity reduction.) If necessary to add manifold gages
for servicing, refer to Carrier Standard Service Techniques
Manual, Chapter 1, page 1-5, Fig. 8, for bypass method of
returning charge to system.
SERVICE
Table 5 — Service Data
COND
UNIT
R-22
CHG*
(Ib-oz)
Rp
CONDENSER FAN
m Dì am
(in.)
Cfm
Hi Lo Hi Lo
38GR002 5-10 1050 850 20 2800 2300
38GR003 5- 6 1050 850 20 2800 2300
38GR004 6- 5 1050 850 20 3100 2600
38GR045 6- 5 1050 850 20 3100 2600
38GR005 6-10 1070 870 20 3700 3200
38GR006 6-10 1070 870 20 3700 3200
38SE002 5- 8 850 20 2400
38SE003 5-13 850 20 2400
38SE004 7-14 850 20 2700
38SE045 9- 8 925 20 3200
38SE055 9- 8 1025 825 20 3900 3400
*38GR: Factory refrigerant charge adequate when condensing
units are connected to Carrier approved evaporators
that are the same size as (or one size larger than) con­
densing unit with Carrier accessory tubing
38SE Factory refrigerant charge adequate when condensing
units are connected to Carrier approved evaporators
that are the same size as condensing unit
See Refrigerant Charging for details
REFRIGERANT CHARGING
38GR,SE condensing units contain correct operating
charge for complete system when connected to Carrier
approved evaporators. Evaporators must be same size (or
one size larger than 38GR) as condensing unit with 50 ft or
less of Carrier accessory tubing or 25 ft or less of
field-supplied tubing of recommended size. For every 10 ft
of liquid line of recommended size over 50 ft, add
refrigerant charge as follows' .7 lb for 1/2-in. line, .4 lb for
3/8-in. line, 1.1 lb for 5/8-in. line. Charge adjustment may
be required on other systems.
To Check, Adjust or Replace Refrigerant Charge on all
Carrier approved systems, use method recommended in
Table 5. Details of charging methods are listed below.
Before recharging Carrier approved systems, evacuate
system to 500 microns and then weigh in refrigerant charge
specified in Table 5. Check or adjust charge as required. If