Page 2 - Fig. 1 — Roof Curb Details
Page 3 - Step 2 — Field Fabricate Ductwork —; Do not connect ductwork to the unit.; Step 4 — Rig and Place Unit —; Do not install the unit indoors.; MAXIMUM ALLOWABLE; Fig. 2 — Unit Leveling Tolerances; Fig. 4 — Condensate Drain Piping Details
3 SLAB MOUNT (Horizontal Units Only) — Provide a levelconcrete slab that extends a minimum of 6 in. beyond the unitcabinet on all sides. Install a gravel apron in front of theoutdoor coil air inlet to prevent grass and foliage from obstruct-ing airflow.NOTE: Horizontal units may be installed on a ro...
Page 4 - Fig. 5 — Rigging Details
4 NOTES:1. Dimension in ( ) is in millimeters.2. Hook rigging shackles through holes in base rail, as shown in detail “ A. ” Holes in base rails are centered around the unit center of gravity. Usewooden top skid when rigging to prevent rigging straps from damagingunit. 3. Unit weights do not include...
Page 5 - Table 1 — Physical Data
5 Table 1 — Physical Data LEGEND Bhp — Brake Horsepower *Weight of 14-in. roof curb. UNIT SIZE 50TFQ 008 009 012 NOMINAL CAPACITY (tons) 7 1 / 2 8 1 / 2 10 OPERATING WEIGHT (lb) Unit 940 965 1015 Economizer EconoMi$er IV 75 75 75 Roof Curb* 143 143 143 COMPRESSOR (Hermetic) Reciprocating Scroll Quan...
Page 7 - Step 5 — Make Electrical Connections; must; LEGEND; Fig. 7 — Power Wiring Connections; Contactor; COMP —; Compressor; IFC; National Electrical Code; TB
7 Step 5 — Make Electrical Connections FIELD POWER SUPPLY — All units except 208/230-vunits are factory-wired for the voltage shown on the unit name-plate. If the 208/230-v unit is to be connected to a 208-v powersupply, the transformer must be rewired by disconnecting the black wire from the 230-v ...
Page 8 - Table 2 — Electric Heating Capacities
8 Table 2 — Electric Heating Capacities *Two heater packages required to provide kW indicated. †Use CRSINGLE008A00 for units with an electrical convenience outlet. NOTES:1. The rated heater voltage is 240, 480, and 575 v. If power distribution voltage varies from rated heater voltage, heater kW will...
Page 12 - Step 6 — Adjust Factory-Installed Options; Fig. 8A — Low-Voltage Connections With or; Field Wiring; CONNECTION
12 FIELD CONTROL WIRING — Install a Carrier-approvedaccessory thermostat assembly according to the installationinstructions included with the accessory. Locate the thermostatassembly on a solid wall in the conditioned space to sense aver-age temperature in accordance with the thermostat installation...
Page 14 - Damper with Hood Attached
14 PREMIERLINK™ CONTROL — The PremierLink control-ler is compatible with Carrier Comfort Network® (CCN)devices. This control is designed to allow users the access andability to change factory-defined settings, thus expandingthe function of the standard unit control board. Carrier’s diag-nostic stand...
Page 16 - PremierLink; COMMS —; Communications; OAT; Outdoor Air Temperature Sensor; PWR; Power; SAT; Supply Air Temperature Sensor; Fig. 16 — Typical PremierLink Controls Wiring
16 TB - 1 R Y1 Y2 W1 W2 G C X 1 2 3 4 5 6 7 8 TB - 3 1 2 3 4 5 6 7 8 TB - 2 1 2 3 4 5 6 7 8 J6 ANAL O G J5 0-2 0m A IN J4 DISCRE T E J1 PWR J2 COMMS J9 0-20 mA J8 Relays HK50AA039 BRN BRN WHT WHT RED PNK PNK ORN ORN ORN ORN GRA GRA ORN RED J7 PP/MP WHT BLK RED RED PNK WHT BLK PNK WHT BLU ORN YEL GRN...
Page 17 - Sensor and Mounting Plate (33AMKITENT006); MOUNTING PLATE; Fig. 17 — Outdoor and Return Air Sensor Wiring
17 Enthalpy Sensors and Control — The enthalpy control (HH57AC077) is supplied as a field-installed accessory to beused with the economizer damper control option. The outdoorair enthalpy sensor is part of the enthalpy control. The separatefield-installed accessory return air enthalpy sensor (HH57AC0...
Page 18 - Fig. 20 — EconoMi$er2 Component Locations; Fig. 21 — Typical Access Panel Locations; Hood; Fig. 22 — Hood Box Removal
18 OPTIONAL ECONOMI$ER IV AND ECONOMI$ER2 —See Fig. 19 for EconoMi$er IV component locations. SeeFig. 20 for EconoMi$er2 component locations.NOTE: These instructions are for installing the optionalEconoMi$er IV and EconoMi$er2 only. Refer to the accessoryEconoMi$er IV or EconoMi$er2 installation ins...
Page 19 - Fig. 25 — Filter Installation
19 6. Insert the hood divider between the hood sides. See Fig. 24 and 25. Secure hood divider with 2 screws oneach hood side. The hood divider is also used as the bot-tom filter rack for the aluminum filter. 7. Open the filter clips which are located underneath the hood top. Insert the aluminum filt...
Page 20 - RUN; Fig. 27 — EconoMi$er2 with 4 to 20 mA Control Wiring
20 4 3 5 2 8 6 7 1 10 11 9 12 PINK VIOLET BLACK BLUE YELLOW NOTE 1 NOTE 3 RUN 500 OHMRESISTOR - + OPTIONAL CO SENSOR 4 - 20 mA OUTPUT 50HJ540573 ACTUATOR ASSEMBLY RED WHITE ECONOMISER2 PLUG DIRECT DRIVE ACTUATOR 2 NOTES: 1. Switch on actuator must be in run position for economizer to operate.2. Prem...
Page 21 - The temperature sensor looks like an eyelet terminal with; Table 6 — Supply Air Sensor Temperature/; Outdoor Air Lockout Sensor; Table 7 — EconoMi$er IV Sensor Usage; OR; Fig. 31 — Supply Air Sensor Location
21 ECONOMI$ER IV STANDARD SENSORSOutdoor Air Temperature (OAT) Sensor — The outdoor airtemperature sensor (HH57AC074) is a 10 to 20 mA deviceused to measure the outdoor-air temperature. The outdoor-airtemperature is used to determine when the EconoMi$er IV canbe used for free cooling. The sensor is ...
Page 23 - Fig. 35 — Enthalpy Changeover Set Points
23 CONTROL CURVE ABCD CONTROL POINT APPROX. °F (°C) AT 50% RH 73 (23)70 (21)67 (19)63 (17) 12 1 4 16 1 8 2 0 22 2 4 26 28 30 32 3 4 3 6 3 8 40 42 4 4 46 9 0 1 0 0 80 70 6 0 50 40 30 20 10 E NT HA L P Y — B TU P E R PO U N D DR Y A IR 85 (29) 90 (32) 95 (35) 100 (38) 105 (41) 110 (43) 35 (2) 35 (2) 4...
Page 25 - Step 7 — Adjust Indoor-Fan Speed —; Table 8 — CO
25 CO 2 sensor to the actuator when the CO 2 concentration in the space is at 1100 ppm. The DCV set point may be left at 2 voltssince the CO 2 sensor voltage will be ignored by the EconoMi$er IV controller until it rises above the 3.6 volt set-ting of the minimum position potentiometer. Once the ful...
Page 26 - Table 9 — Fan Motor Performance; BHP —; Fig. 38 — Typical Belt-Drive Motor Mounting for
26 To align the fan and motor pulleys: 1. Loosen the fan pulley setscrews.2. Slide the fan pulley along the fan shaft.3. Make angular alignment by loosening the motor from the mounting plate. To adjust belt tension: 1. Loosen the fan motor mounting nuts.2. Sizes 008 and 009 — Slide the motor mountin...
Page 27 - Table 10 — Fan Rpm at Motor Pulley Settings*; †Indicates standard motor and drive package.
27 Table 10 — Fan Rpm at Motor Pulley Settings* *Approximate fan rpm shown. †Indicates standard motor and drive package. **Indicates alternate drive package only. ††Indicates high-static motor and drive package. Table 11A — Electric Heater Static Pressure* (in. wg) — 50TFQ008-012 *The static pressur...
Page 28 - Refer to page 43 General Fan Performance Notes.; indicates field-supplied drive is required.
28 Table 12 — Fan Performance, 50TFQ008 — Vertical Discharge Units; Standard Motor and Drive* LEGEND *Motor drive range: 590 to 840 rpm. All other rpms require field- supplied drive. Refer to page 43 General Fan Performance Notes. NOTES: 1. Boldface indicates field-supplied drive is required. 2. Max...
Page 43 - Refer to General Fan Performance Notes below.; GENERAL NOTES FOR FAN PERFORMANCE DATA TABLES
43 Table 27 — Fan Performance, 50TFQ012 — Horizontal Discharge Units; High-Static Motor and Drive* LEGEND *Motor drive range: 830 to 1130 rpm. All other rpms require field- supplied drive. Refer to General Fan Performance Notes below. NOTES: 1. Boldface indicates field-supplied drive is required. 2....
Page 47 - Fig. 43 — Cleaning Outdoor Coil
47 HEATING, UNIT WITH ECONOMI$ER2, PREMIERLINK™CONTROL AND A ROOM SENSOR — Every 40 secondsthe controller will calculate the required heat stages (maximumof 3) to maintain supply air temperature (SAT) if the followingqualifying conditions are met:• Indoor fan has been on for at least 30 seconds.• CO...
Page 48 - Fan motor bearings are per-; Fig. 46 — Outdoor Fan Adjustment; UNIT
48 FILTERS — Clean or replace at the start of each heating andcooling season, or more often if operating conditions require it.Replacement filters must be the same dimensions as originalfilters.OUTDOOR-AIR INLET SCREEN — Clean the screen withsteam or hot water and a mild detergent. Do not use dispos...
Page 52 - Table 28 — Heating and Cooling Troubleshooting
52 Table 28 — Heating and Cooling Troubleshooting PROBLEM CAUSE REMEDY Compressor and Outdoor FanWill Not Start. Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, orcontrol relay. Replace com...
Page 53 - Table 29 — EconoMi$er IV Input/Output Logic
53 Table 29 — EconoMi$er IV Input/Output Logic *For single enthalpy control, the module compares outdoor enthalpy to the ABCD set point. †Power at N terminal determines Occupied/Unoccupied setting: 24 vac (Occupied), no power (Unoccupied). **Modulation is based on the supply-air sensor signal. ††Mod...
Page 54 - INDEX
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500019-01 Printed in U.S.A. Form 50TFQ-9SI Pg 54 9-05 Replaces: 50TFQ-7SI Book 1 4 Tab 5a 5a Copyright 2005 Carrier Cor poration INDEX A...
Page 56 - I. PRELIMINARY INFORMATION; ELECTRICAL
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500019-01 Printed in U.S.A. Form 50TFQ-9SI Pg CL-1 9-05 Replaces: 50TFQ-7SI Book 1 4 Tab 5a 5a Copyright 2005 Carrier Cor poration - -- ...