Carrier 060 Instrukcje Operacyjne Pobierz pdf (Strona 19)

Table 6_Heating Inputs

HEATING

INPUT

(BTUH)*

NUMBER

ORIFICES

40,000 2

60,000 2

90,000 3

115,000 3

130,000 3

Min

4.0

GAS SUPPLY PRESSURE

(IN. WG)

Natural Propanel"

Max Min

13,0 4.0

13.0 4.0

Max

13.0

13,0

13.0

MANIFOLD

PRESSURE

(IN. WG)

Natural Propane,"

3.5 3.5

3.5 3.4

3.5 3.7

3.5 3.5

• When a unit is converted to propane, different size orifices must be used. See separate, natural4o-propene conversion kit instructions.

f Based on altitudes from sea level to 2000 It above sea level. For altitudes above 2000 It, reduce input rating 4 percent for each additional 1000 It above sea level.

in Canada, from 2000 It above sea level to 4500 It above sea lev_, derato the unit 10 percent.

1. Remove cover screw over regulator adjustment screw on gas

valve.

2. Turn regulator adjustment screw clockv4se to increase gas

input, or turn regulator adjustment screw counterclockwise to

decrease input. Manifold pressure must be between 3.4 and

3.6 in. wg. Unsafe operation of the unit may result if manifold

pressure is outside this range. Personal injury or unit damage

may result.

3. Replace cover screw cap on gas valve.

4. Turn off gas supply to unit. Remove manometer from pressure

tap and replace pipe plug on gas valve. Turn on gas to unit and

check for leaks.

Measure Manifold Pressure (Propane Units)

The main burner orifices on a propane gas unit are sized for the

unit rated input when the manifold pressure reading matches the

level specified in Table 6.

Proceed as follows to adjust gas input on a propane gas unit:

1. Turn off gas to unit.

2. Remove pipe plug on manifold and connect manometer (See

Fig. 13).

3. Turn on gas to unit.

4. Remove cover screw over regulator adjustment screw on gas

Valve.

5. Adjust regulator adjustment screw to the correct manifold

pressure, as specified in Table 6. Turn adjusting screw

clockwise to increase manifold pressure, or turn adjusting

screw counterclockwise to decrease manifold pressure.

6. Replace cover screw.

7. Turn off gas to unit. Remove manometer from pressure tap.

Replace pipe plug on gas valve, then turn on gas to unit. Check

for leaks.

CHECK BURNER FLAME

With burner access panel removed, observe the unit heating

operation. Watch the burner flames to see if they are light blue and

soR in appearance, and that the flames are approximately the same

for each burner. Propane will have blue flame with yellow tips

(See Fig. 14). Refer to the Maintenance section for information on

burner removal.

AIRFLOW AND TEMPERATURE RISE

The heating section for each size unit is designed and approved for

hearing operation within the temperature-rise range stamped on the

unit rating plate.

Table 7 shows the approved temperature rise range for each

heating input, and the air delivery cfm at various temperature rises.

The heating operation airflow must produce a temperature rise that

fails within the approved range.

Refer to Indoor Airflow and Airflow Adjustrnents section to adjust

heating airflow when required.

HEATING SEQUENCE OF OPERATION

(See Fig. 15-16 and unit wiring label).

On a call for hearing, terminal "W" of the thermostat is energized,

starting the induced-draft motor. When die hall-effect sensor on

the induced-draft motor senses that it has reached the required

speed, the burner sequence begins. This function is performed by

the integrated gas control (IGC). The evaporator-fan motor is

energized 45 sec. afar flame is established. When the thermostat

is satisfied and "W" is deenergized, the burners stop f-wing and the

evaporator-fan motor shuts off after a 45-sec. time-off delay.

An LED (light-emitting diode) indicator is provided on the control

board to monitor operation. The control board is located by

removing the burner access panel. During normal operation, the

LED is continuously on (See Table 8 for error codes).

LIMIT SWITCHES

Normally closed limit switch (LS) completes the control circuit

through the thermostat R circuit. Should the leaving-air tempera-

ture rise above the maximum allowable temperature, the limit

switch opens and the R control circuit "breaks." Any interruption

in the R control circuit instantly closes the gas valve and stops gas

flow to the burners and pilot. The blower motor continues to run

until LS resets.

When die air temperature at the limit switch drops to the

low-temperature setting of the limit switch, the switch closes and

completes the R control circuit. The electric-spark ignition system

cycles and the unit returns to normal beating operation.

AUXILIARY LIMIT SWITCH (ROLLOUT)

The function of the switch is to close the main gas valve in the

event of flame rollout. The switch is loca_d above die main

burners. When the temperature at the auxiliary switch reaches the

maximum allowable temperature, the R control circuit trips,

closing the gas valve and stopping gas flow to the burners. The

indoor (evaporator) fan motor (IFM) and induced draft motor

continue to man until switch is reset. The IGC LED will display

FAULT CODE 7.

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 31 32

Komentarze do niniejszej Instrukcji

Brak uwag

Carrier 060 Instrukcje Operacyjne Strona 19

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Nie Carrier 060