Page 1: Table Of Contents
® WeatherMaker 50FCQ*14 Single Package Rooftop Heat Pump ® with Puron (R-410A) Refrigerant and EcoBlue™ Fan Technology Installation Instructions CONTENTS EconoMi$er X (Factory-Installed Option) ..25 • PRODUCT DESCRIPTION Page • SYSTEM COMPONENTS SAFETY CONSIDERATIONS ....1 •...
Page 2: Model Number Nomenclature And Dimensions
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguisher WARNING available for all brazing operations. It is important to recognize safety information. This is the safety- PERSONAL INJURY AND ENVIRONMENTAL alert symbol .
Page 3 Position: 9 10 11 12 13 14 15 16 17 18 Example: Unit/Series/Model Packaging & Seismic Compliance 50FCQ – Packaged Rooftop Heat Pump 0 = Standard Standard Efficiency with 1 = LTL EcoBlue™ Fan Technology Electrical Options Refrig. Systems Options A = None M = Two Stage Cooling, Single Circuit C = Non-Fused Disconnect (NFD)
Page 4 Fig. 2 — 50FCQ-14 Unit Dimensional Drawing...
Page 5 Fig. 2 — 50FCQ*14 Unit Dimensional Drawing (cont)
Page 6: Installation
DIMENSION LOCATION CONDITION in. (mm) 48 (1219) Unit disconnect is mounted on panel. 18 (457) No disconnect, convenience outlet option. 18 (457) Recommended service clearance. 12 (305) Minimum clearance. 42 (1067) Surface behind servicer is grounded (e.g., metal, masonry wall). 36 (914) Surface behind servicer is electrically non-conductive (e.g., wood, fiberglass).
Page 7: Curb-Mounted Installation
curb-mounted units, some accessories must be installed on the unit Install insulation, cant strips, roofing felt, and counter flashing as before the unit is placed on the curb. Review the following for rec- shown. Ductwork must be attached to curb and not to the unit. ommended sequences for installation steps.
Page 8 Fig. 5 — 50FCQ*14 Roof Curb Details...
Page 9: Step 6 - Rig And Place Unit
Place All Gasket in Place Before Placing Unit on Roof Curb. (914-1371) “B” 36”-54” “C” Detail “A” Duct End “A” “A” See Detail “A” DIMENSIONS MAX WEIGHT UNIT 50FCQ*14 1901 116.0 2945 57.0 1450 59.5 1510 NOTES: 1. Dimensions in () are in millimeters. 2.
Page 10: Step 7 - Convert To Horizontal And Connect
Step 7 — Convert to Horizontal and Connect Unit is shipped in the vertical duct configuration. Unit without factory-installed economizer or return air smoke detector option may be field-converted to horizontal ducted configuration using accessory CRDUCTCV002A00. To convert to horizontal config- uration, remove screws from side duct opening covers and remove Remove covers.
Page 11: Step 9 - Install External Condensate Trap And Line
To use the alternate bottom drain connection, remove the red drain plug from the bottom connection (use a 1/2 in. square socket drive extension) and install it in the side drain connection. Side The piping for the condensate drain and external trap can be com- Panel pleted after the unit is in place.
Page 12 Field Power Supply For those units without through-the-curb power, conduit must be used to route the main power from the condenser end, via the power entry in the corner post of the unit (see Fig. 16-18) to either the factory option disconnect or the bottom of the control box. A 1 in.
Page 13: Field Wiring
Such operation would invalidate any applicable TEST LEADS - Unit may be equipped with short leads (pigtails) Carrier warranty. on the field line connection points off the optional disconnect switch. These leads are for factory run-test purposes only; remove...
Page 14: Units Without Factory-Installed Non-Fused Disconnect
Make sure the NFD shipped from the factory is at OFF UNITS WITHOUT FACTORY-INSTALLED NON-FUSED position (the arrow on the black handle knob is at OFF). DISCONNECT Insert the shaft with the cross pin on the top of the shaft in When installing units, provide a disconnect switch per NEC the horizontal position.
Page 15: All Units
heads at the keyhole slots and align with the gasket; tighten the through the hole on the right side of the disconnect. Be sure to two screws until snug (do not over-tighten). create a drip loop at least 6 inches long. Mount the weatherproof cover to the backing plate as shown in Fig.
Page 16: Factory-Option Thru-Base Connections (Electrical Connections)
0.5” Electrical Bulkhead The 50FCQ*14 requires an external temperature control device. Connector This device can be a thermostat (field-supplied) or a SystemVu™ controller (available as factory-installed option for use on a Carrier Comfort Network or as a stand-alone control). ® Thermostat...
Page 17: Set Heat Anticipator Settings At 0.14 Amp
Unit without Thru-Base Connection Kit Pass the thermostat control wires through the bushing on the unit end panel. Route the wire through the snap-in wire tie and up to the web bushing near the control box. Route the wire through the bushing and into the bottom left side of the control box after re- moving one of the two knockouts in the corner of the box.
Page 18 Fig. 34 — Defrost Control Board Location - 50FCQ 14 Electro-Mechanical Unit Shown Table 3 — 50FCQ Defrost Board I/O and Jumper Configurations POINT NAME TYPE OF I/O CONNECTION PIN NUMBER UNIT CONNECTION NOTE INPUTS G Fan DI, 24 vac P2-3 CTB-G Y1 Cool 1...
Page 19 Shorting the jumpers for a period of 5 to 20 seconds bypasses the size unit. Refer to the label on the unit cabinet for the list of ap- remaining continuous run period and places the unit in a Forced proved heaters. Defrost mode.
Page 20 SINGLE POINT BOXES AND SUPPLEMENTARY FUSES When the unit MOCP device value exceeds 60-A, unit-mounted supplementary fuses are required for each heater circuit. These fuses are included in accessory single point boxes, with power distribution and fuse blocks. The single point box will be installed directly under the unit control box, just to the left of the partition separating the indoor section (with electric heaters) from the out- door section.
Page 21 Fig. 41 — Typical Control Wiring Diagram, Electro-Mechanical with W7220 Controller...
Page 22 Fig. 42 — Typical Control Wiring Diagram, SystemVu™ Controller...
Page 23 Fig. 43 — Typical Power Wiring Diagram – 208/230, 460-3-60 Unit Shown...
Page 24 Fig. 44 — Typical Power Wiring Diagram – 575-3-60 Unit Shown...
Page 25: Economi$Er X (Factory-Installed Option)
User Interface EconoMi$er X (Factory-Installed Option) Provides status for normal operation, setup parameters, checkout PRODUCT DESCRIPTION tests, and alarm and error conditions with a 2-line 16 character The EconoMi$er ® X system is an expandable economizer control LCD display and four button keypad. system, which includes a W7220 economizer module (controller) Electrical with an LCD and keypad (see Fig.
Page 26: Economizer Module Wiring Details
Storage Temperature: Table 6 — Economizer Module - Right Hand Terminal –40°F to 150°F (–40°C to 65°C) Blocks Shipping Temperature: LABEL TYPE DESCRIPTION –40°F to 150°F (–40°C to 65°C) Top Right Terminal Blocks Relative Humidity: AUX2 I 24 vac IN The first terminal is not used.
Page 27: Co2 Sensor Wiring
To use the keypad when working with menus: Table 7 — HH57AC081 Sensor Wiring Terminations • Press the ▲ (Up arrow) button to move to the previous menu. TERMINAL TYPE DESCRIPTION • Press the ▼ (Down arrow) button to move to the next NUMBER LABEL menu.
Page 28: Setup And Configuration
SETUP AND CONFIGURATION IMPORTANT: Table 9 illustrates the complete hierarchy. Before being placed into service, the W7220 economizer module Your menu parameters may be different depending on must be setup and configured for the installed system. your configuration. For example, if you do not have a DCV (CO ) sensor, then IMPORTANT: During setup, the economizer module is none of the DCV parameters appear and only MIN POS will...
Page 29 Table 9 — W7220 Menu Structure PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT FIRST STAGE COOLING DEMAND (Y1–IN) ECONO AVAIL YES/NO YES = economizing available; the system can use outside air for free cooling when required FIRST STAGE COOLING RELAY OUTPUT ECONOMIZING YES/NO YES = outside air being used for 1 stage cooling...
Page 30 Table 9 — W7220 Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT MECH COOL ON Displays stage of mechanical cooling that is active. 0, 1, or 2 HEAT STAGES ON Displays the stage of heat pump heating that is active. STATUS SUPPLY FAN SPEED (cont)
Page 31 Table 9 — W7220 Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT 0°F to 50°F ENERGY RECOVERY VENTILATOR UNIT OUTDOOR AIR ERV OAT SP 32°F (–18°C to 10°C); TEMPERATURE SETPOINT increment by 1°F Only displayed when AUX1 O = ERV Exhaust fan set point for single speed units.
Page 32 Table 9 — W7220 Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT COOLING STAGE 3 DELAY 0 min, 5 min, Delay after stage 2 cool has been active. Turns on second stage of 15 min, then cooling when economizer is first stage and mechanical cooling is STG3 DLY 2.0h...
Page 33 Table 9 — W7220 Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT DISCHARGE AIR S-BUS SENSOR ERROR DA SYLK T ERR Discharge air sensor has failed or become disconnected - check wiring then replace sensor if the alarm continues. OUTSIDE AIR TEMPERATURE SENSOR ERROR OA SENS T ERR Outdoor air temperature sensor has failed or become disconnected...
Page 34: Standard Or Single Speed Fan Operation
STANDARD OR SINGLE SPEED FAN OPERATION The W (heating mode) is not controlled by the W7220 but it re- quires the status to know where to position the OA damper for FAN TYPE = 1 SPEED is not used on 50FCQ*14 units. minimum position for the fan speed.
Page 35: 2Sp H/C (2 Speed Heat/Cool) Speed Fan Operation
2SP H/C (2 SPEED HEAT/COOL) SPEED FAN OPERATION Refer to Table 12 for ENTH CURVE set point values. The W7220 calculates the enthalpy and dew point using the OA FAN TYPE = 2SP H/C is not used on 50FCQ*14 units temperature and humidity input from the OA enthalpy sensor.
Page 36: Checkout
CHECKOUT TROUBLESHOOTING Inspect all wiring connections at the economizer module’s termi- Alarms nals, and verify compliance with the installation wiring diagrams. The economizer module provides alarm messages that display on For checkout, review the Status of each configured parameter and the 2-line LCD.
Page 37: Smoke Detectors
SMOKE DETECTORS ADDITIONAL APPLICATION DATA Smoke detectors are available as factory-installed options on Refer to the application data sheet titled “Factory-Installed Smoke 50FCQ models. Smoke detectors may be specified for supply air Detector, for Small and Medium Rooftop Units 2 to 25 Tons” for only, for return air without or with economizer, or in combination discussions on additional control features of these smoke detectors of supply air and return air.
Page 38: Step 11 - Adjust Factory-Installed Options
Step 11 — Adjust Factory-Installed Options SMOKE DETECTORS Smoke detector(s) will be connected at the Unit Control Board (UCB), at terminals marked “Smoke Shutdown.” ECONOMI$ER X OCCUPANCY SWITCH If external occupancy control is desired, connect a time clock or remotely controlled switch (closed for Occupied, open for Unoc- cupied sequence) at terminals marked OCCUPANCY.
Page 39: Units With Systemvu™ Controls
ESP in. wg Factory Setting: Calculator 9.0 V 3000 Field Setting: 3250 Record field setting here 3500 3750 4000 Switch Range: 4250 4500 4.1 - 7.5 4750 10.0 6.9 - 8.7 5000 7.7 - 10.0 Field Accessories: Economizer * Overlap in A, B, C switch range designed for maximum field adjustment potential.
Page 40 ESP in. wg Calculator 1250 1348 1441 1528 1610 1688 1762 1832 1899 1963 3000 1336 1428 1515 1598 1677 1753 1824 1893 1959 2021 3250 1423 1509 1591 1670 1746 1819 1888 1955 2020 2081 3500 1510 1591 1669 1744 1817 1887...
Page 41: Typical Unit Piping
Typical Unit Piping Table 14 — 50FCQ*14 – Heating Mode 50FCQ*14 heat pump systems include two compressors, a revers- COMPONENT STATUS/POSITION ing valve, dual-function outdoor and indoor coils, a common liq- Reversing Valve De-energized uid line with bi-flow TXV, and dedicated cooling and heating Check Valve A Open TXVs.
Page 42: Pre-Start And Start-Up
Service Manual for detailed Pre-Start and Start-Up instruc- tions. Download the latest versions from HVAC Partners (www.hvacpartners.com). © 2022 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500327-01 Printed in U.S.A.
Page 43: Start-Up Checklist
START-UP CHECKLIST 50FCQ*14 Single Package Rooftop Heat Pump Units (Remove and use for job file) NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sections of this Installation Instruction document.
Page 44 © 2022 Carrier Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500327-01 Printed in U.S.A. Form 50FCQ-14-01SI Rev. A Pg CL-2 6-22 Replaces: New...

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