Carrier 48/50PD05 User Manual

65The TXV is set to maintain between 10 and 15 degrees ofsuperheat at the compressors. The valves are factory set and cannotbe adjusted. Do not use A TXV designed for use with R--22.R4R410A REREFRIRIGERANTRANTOUTDOOR FR FAN MN M UST BE OPERATING ON HN HIGH SH SPEED202040406060808010100121201414016160150150 200200 25250 30000 350350 400400 450450 500500 550550 600600Compre ssssor Discisc ha rge P re ssssure , [psigsig]Adddd Chaharge if Abovbove thethe CururveRem oveve ChChararge ifif Belolow the CuCurveveOutdoorOutdoor CoilCoil Leavineaving TempTemp eratuerature,re, [Deg[Degreesrees F]F]C07040Fig. 35 -- Charging Chart ⎯ 48/50PD05R4R410A REREFRIRIGERANTRANTOUTDOOR FR FAN MN M UST BE OPERATING ON HN HIGH SH SPEED202040406060808010100121201414016160150150 200200 25250 30000 350350 400400 450450 500500 550550 600600Compre ssssor Discisc ha rge P re ssssure , [psigsig]Adddd Chaharge if Abovbove thethe CururveRem oveve ChChararge ifif Belolow the CuCurveveOutdoorOutdoor CoilCoil Leavineaving TempTemp eratuerature,re, [Deg[Degreesrees F]F]C07041Fig. 36 -- Charging Chart ⎯ 48/50PD06PuronR RefrigerantPuron refrigerant operates at 50 to 70 percent higher pressures thanR-22. Be sure that servicing equipment and replacementcomponents are designed to operate with Puron refrigerant. Do notmix with components that have been used with other refrigerants.Puron refrigerant, as with other HFCs, is only compatible withPOE oils.Recovery cylinder service pressure rating must be 400 psig. Puronsystems should be charged with liquid refrigerant. Use acommercial-type metering device in the manifold hose. Manifoldsets should be 750 psig high-side and 200 psig low-side with 520psig low-side retard. Use hoses with 750 psig service pressurerating. Leak detectors should be designed to detect HFCrefrigerant.Table 26 — Altitude Compensation*48PG03--07ELEVATION(ft)NATURAL GASORIFICE†PROPANEORIFICE†0-1,999 45 522,000 47 523,000 47 534,000 47 535,000 48 536,000 48 537,000 48 538,000 49 549,000 49 5410,000 50 5411,000 51 5412,000 51 5513,000 52 5514,000 52 56* 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% inputreduction per each 1000 ft.† Orifices available through your Carrier dealer.Gas Valve AdjustmentThe gas valve opens and closes in response to the thermostat orlimit control.When power is supplied to valve terminals W2 (High Fire) and C1,the main valve opens to its preset position.The regular factory setting is stamped on the valve body.To adjust regulator:1. Set unit at setting for no call for heat.2. Turn main gas valve to OFF position.3. Remove 1/8-in. pipe plug from manifold pressure tapconnection. Install a suitable pressure-measuring device.4. Set main gas valve to ON position.5. Set thermostat at setting to call for heat.6. Remove screw cap covering regulator adjustment screw.(See Fig. 37.)7. Turn adjustment screw clockwise to increase pressure orcounterclockwise to decrease pressure. The setting is 3.50in. wg on sizes 03-14 and 3.00 on size 16--28.8. Once desired pressure is established, set unit setting for nocall for heat, turn off main gas valve, removepressure-measuring device, and replace 1/8-in. pipe plug andscrew cap.C08663Fig. 37 -- 48PD Gas Valve48/50PD