Carrier MOTORMASTER 48/50P3 Installation Instructions Manual

Contents

Carrier MOTORMASTER 48/50P3 Installation Instructions Manual Manual pdf 1 page image

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53480070-01 Printed in U.S.A. Form 48/50P-2SI Pg 1 9-09 Replaces: NewInstallation InstructionsPart Numbers: CRLOWAMB033A00 THROUGH CRLOWAMB038A00CONTENTSPageSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . 1GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12Pre-Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Step 1 — Install Field-Fabricated Wind Baffles . . . 3Step 2 — Mounting and Electrical Connectionsfor Motormaster ® V Control . . . . . . . . . . . . . . . . . . . . 5Step 3 — Configure Motormaster V Control . . . . . 11Step 4 — Test Motormaster V Control . . . . . . . . . . . 11START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-13TROUBLESHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . 13-15SAFETY CONSIDERATIONSInstallation, start-up, and servicing of this equipment can behazardous due to system pressures, electrical components, andequipment location (roofs, elevated structures, etc.).Only trained, qualified installers and service techniciansshould install, start up, and service this equipment.When working on this equipment, observe precautions inthe literature and on tags, stickers, and labels attached to theequipment and any other safety precautions that may apply.GENERALThis book contains instructions for the installation, start-up,and service of the Motormaster V (MMV) control on48/50P030-100 units.The Motormaster V control is a motor speed control devicewhich adjusts condenser fan motor speed in response to varyingliquid refrigerant pressure. A properly applied Motormaster Vcontrol extends the operating range of air-conditioning systemsand permits operation at lower outdoor ambient temperatures.To operate these units at very low ambient temperatures, Mo-tormaster V controls (Fig. 1) must be added. Field-fabricated andinstalled wind baffles are also required for units in areas with pre-vailing winds of more than 5 mph (8 kph) and where tempera-tures drop below 32 F (0° C). The Motormaster V control permitsoperation of the unit to an ambient temperature of –20 F (–29 C).The control regulates the speed of one or two 3-phase fan motorsdepending on unit size. Replacement of the fan motor on mostunits is not necessary since the control is compatible with thefactory-installed fan motors. To verify that unit fan motors arecompatible with the control see Table 1.See Tables 2-4 for the Motormaster V control accessory pack-age usage and contents. Field wiring of control is required.Table 1 — Replacement Motor Part NumbersWARNINGOpen all remote disconnects before servicing this equip-ment. Electrical shock could result in personal injury.48/50P2,P3,P4,P5 UNIT SIZE VOLTAGE ACCESSORY PART NUMBER035208/230-3-60 Not Required, Std Unit Motor400-3-50, 460-3-60 Not Required, Std Unit Motor575-3-60 Not Required, Std Unit Motor380-3-60 HD56AK380030, 040-060208/230-3-60 HD52AK002400-3-50, 460-3-60 HD52AK002575-3-60 Not Required, Std Unit Motor380-3-60 Not Required, Std Unit Motor070208/230-3-60 HD52AK002 (2 Required)400-3-50, 460-3-60 HD52AK002 (2 Required)575-3-60 Not Required, Std Unit Motor380-3-60 Not Required, Std Unit Motor075-100208/230-3-60 Not Available400-3-50, 460-3-60 HD52AK002 (2 Required)575-3-60 Not Required, Std Unit Motor380-3-60 Not Available48/50P2,P3,P4,P5030-100Low Ambient OperationMOTORMASTER® V Control Accessory50/60 Hz