R410A REFRIGERANT
OUTDOOR FAN M UST BE OPERATING ON HIGH SPEED
160
111111111 IIIIII IIIIIIIIIIII IIIII
111111111 IIIIII IIIIIIIIIIII IIIII
IIIIIIIII IIIIII IIIIIIIIIIII IIIII
111111111 IIIIII IIIIIIIIIIII IIIII
14o111111111 IIIIII IIIIIIIIIIII IIIII
111111111 IIIIII IIIIIIIIIIII IJ,4"rl
111111111 IIIIII IIIIIIIIIIII _1111
}_1'""' "'"' IIIIIIIIII LJ, IIIII
,2o. ,*ddC,orgt,!fbo_e!,,e,Cu,,_e,lllllll_'_l lllll
1111 I II IIIIII II 11113,_11111 IIIII
1111 I II IIIIII II II/TIIIIIIII IIIII
IIII I II IIIIII 11.4"11111111111 IIIII
1°°IIII I II IIIIIIIJ4" IIIIIIIIIIII IIIII
1111 I II IIII1_11 IIIIIIIIIIII IIIII
IIII I II 111,4"11II IIIIIIIIIIII IIIII
8o1111 I IIIJ4"llll II IIIIIIIIIIII IIIII
IIII I IJ4"llllll II IIIIIIIIIIII IIIII
IIII I I_1 IIIIII II IIIIIIIIIIII IIIII
IIII I /'111
oo.t111/ II
IIII, I II
IllY I II
401111 I II
IIII I II
1111 I II
IIII I II
201111 I lJJl
150 200 250
[[.1111 II IIIIIIIIIIII I1_
IIIIII F_ .... Charge if _low the C.... rH
IIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
l[iJililli]l[]]ii][illlilli]l[]l
_0 050 400 450 500 550 600
Compressor Discharge Pressure, [psig]
Fig. 35 -- Charging Chart -- 48PG07
PURON® REFRIGERANT -- Puron refrigerant operates at
50 to 70 percent higher pressures than R-22. Be sure that
servicing equipment and replacement components are designed
to operate with Puron refrigerant. Do not mix with components
that have been used with other refrigerants. Puron refrigerant,
as with other HFCs, is only compatible with POE oils.
Recovely cylinder service pressure rating must be 400 psig.
Puron systems should be charged with liquid refrigerant. Use a
commercial-type metering device in the manifold hose. Mani-
fold sets should be 750 psig high-side and 200 psig low-side
with 520 psig low-side ret_ud. Use hoses with 750 psig service
pressure rating. Leak detectors should be designed to detect
HFC refrigerant.
Gas Valve Adjustment -- The gas valve opensand clos-
es in response to the thennostat or limit control.
When power is supplied to valve termimds W2 (High File)
and CI, the main valve opens to its preset position.
The regular factoly setting is stamped on the valve body.
To adjust regukitor:
1. Set unit at setting for no call for heat.
2. Turn main gas valve to OFF position.
3. Remove l/s-in, pipe plug from manifold pressure tap con-
nection. Install a suitable pressure-measuring device.
4. Set main gas v_dve to ON position.
5. Set thermostat at setting to call for heat.
6. Remove screw cap covering legulator adjustment screw
(See Fig. 36).
7. Turn adjustment screw clockwise to increase pressure
or counterclockwise to decrease pressure. The setting is
3.50 in. wg.
8. Once desired pressure is established, set unit setting
for no call for heat, turn off main gas valve, remove
pressure-measuring device, and replace l/s-in, pipe
plug and screw cap.
High Altitude- For high _fltitude applications greater
than 2,000 ft the heat input rate should be reduced. The higher
the altitude is above sea level, the less oxygen is in the till: See
Table 35 for orifice sizing. A high altitude kit is available to
convert unit for altitudes up to 7,000 ft.
Fig. 36 -- Gas Valve (48PG08-14 Shown)
Table 35 -- Altitude Compensation*
ELEVATION/ft)
0-1,999
2,000
3,000
4,000
5,000
6,000
7,000
8,000
9,000
10,000
11,000
12,000
13,000
14,000
NATURAL GAS ORIFICEt
45
47
47
47
48
48
48
49
49
5O
51
51
52
52
LP ORIFICEt
52
52
53
53
53
53
53
54
54
54
54
55
55
56
LEGEND
LP -- Liquid Propane
*As the height above sea level increases, there is less oxygen per cubic foot
of air, Therefore, heat input rate should be reduced at higher altitudes,
Includes a 4% input reduction per each 1000 ft.
tOrifices available through your Carrier dealer,
LP (Liquid Propane) Gas Use --Base units are
equipped with orifice sizes selected for natural gas use at eleva-
tions below 2000 ft. If LP fuel will be used, change the orifices
according to Table 35 data. Manifold pressure is NOT changed
when using LP fuel. Check per Start-Up section on page 20.
Main Burners -- For all applications, main burners are
factory set and should require no adjustment.
MAIN BURNER REMOVAL
1. Shut off (field-supplied) manual main gas v_dve.
2. Shut off power to unit.
3. Open gas section access door.
4. Disconnect gas piping from gas valve inlet.
5. Remove wires from gas valve.
6. Remove wires from rollout switch.
7. Remove sensor wire and ignitor cable from IGC board.
8. Remove 2 screws that hold the burner assembly to vesti-
bule plate.
9. Rotate the burner/manifold assembly to the right, away
from the flue extension and lill burner/manifold assembly
out of unit.
CLEANING AND ADJUSTMENT
1. Remove burner rack from unit as described in Main
Burner Removal section above.
2. Inspect burners, and if dilly, remove burners from rock.
The two outer burners have the flame crossover closed
off in order to prevent gas flow from exiting the sides of
the burner assembly. To prevent ignition problems, make
sure the outer burners are returned to their origimd posi-
tion when done servicing.
3. Using a soft brush, clean burners and crossover port as
required.
4. Adjust spark gap. See Fig. 37.
42
To Next Page
Loading...
