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TM
Rooftop Water Source Heat Pump Units
50RTG
Installation, Start-Up, and
Service Instructions
CONTENTS Page
OPERATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Page
Power Up Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . .1,2
Units with Aquazone™ Complete C Control . . . . . 19
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Units with
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Follow all safety codes. Wear safety glasses and work damage not discovered during unloading must be reported to gloves. Use quenching cloth for brazing operations. Have fire the shipping company within 15 days of receipt of shipment. extinguisher available. Read these instructions thoroughly and NOTE: It is the responsibility of the purchaser to file all follow all warnings or cautions attached to the unit. Consult necessary claims with the shipping company. local building codes and the Nationa
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INSPECT UNIT — To prepare the unit for installation, com- 7. Remove any blower support cardboard from inlet of the plete the procedures listed below: blower if present. 1. Compare the electrical data on the unit nameplate with 8. Locate and verify any accessory kit located in compressor ordering and shipping information to verify that the section. correct unit has been shipped. 9. Remove any access panel screws that may be difficult to 2. Verify that the unit is the correct model for the enterin
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4 NOTES: DIMENSIONS (in.) 1. All dimensions are in inches. 50RTG 2. Carrier works continuously to improve its products. As a result, the design Outside Air Water UNITS ABCD E F and specification of each product at the time of order may be changed with- Opening Size In/Out (FPT) out notice. 3 03/04 39.52 43.90 81.00 12.32 4.692 6.614 12.57 x 30.00 / 1 4 3. Assembly tolerances ± / . 8 05 39.52 43.90 81.00 12.32 4.692 6.614 12.57 x 30.00 1 1 F 07 39.52 43.90 81.00 12.32 4.692 6.614 12.57 x 30.00 1
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5 ROOF CURB ASSEMBLY DETAILS DIMENSIONS (in.) ROOF CURB Return Air Transition Supply Air Transition AB C E F GH J K GH J K RETURN AIR TRANSITION 50RTGACURBCAAA 35.25 72.25 18.00 1.50 12.50 22.00 16.00 39.25 33.25 27.00 21.00 39.25 33.25 50RTGACURBBAAA 41.25 82.25 21.00 1.50 12.50 25.00 19.00 45.25 39.25 27.00 21.00 45.25 39.25 SUPPLY AIR 50RTGACURBAAAA 78.875 82.25 21.00 5.00 9.00 25.00 19.00 82.875 76.875 27.00 21.00 82.875 76.875 TRANSITION Return Air TRANSITION DETAIL (FIELD SUPPLIED) A Suppl
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WATER LOOP APPLICATIONS — Water loop applications Step 4 — Mounting the Unit — For proper opera- usually include a number of units plumbed to a common pip- tion, units must be mounted on a roof curb as shown in Fig. 3. ing system. Maintenance to any of these units can introduce air Follow these guidelines when installing the roof curb: into the piping system. Therefore, air elimination equipment 1. Set unit on curb. comprises a major portion of the mechanical room plumbing. 2. Align unit so tha
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AB = 452 volts Step 7 — Electrical Wiring BC = 464 volts AC = 455 volts 452 + 464 + 455 Average Voltage = To avoid possible injury or death due to electrical shock, 3 open the power supply disconnect switch and secure it in an open position during installation. 1371 = 3 = 457 Use only copper conductors for field-installed electrical Determine maximum deviation from average voltage: wiring. Unit terminals are not designed to accept other (AB) 457 – 452 = 5 v types of conductors. (BC) 464 – 457 =
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50RTG03-07 WITH ECONOMIZER AND COMPLETE C CONTROLLER WHT Ground 115V / 1PH GRN Field BLK BLK L1 BLK Wiring BLK L1 L1 T1 Power Supply BLK L2 BLK BLK L2 Refer to Data Plate GFI L2 T2 (Optional) BLK T3 Use copper conductors only. L3 BLK BLK L3 L3 Compressor Disconnect CC Power OR BLK BLK Distribution CB Block (Optional) BLK BLK BLK BLK Blower Motor BC ES Logic Module MAS (Damper Actuator) + - GRY BRN GRY BLU 600 Ohm 150 Ohm TR1 + +2 5 4 T1 P1 BRN TR S O SR 13 T P LAR 4 3 GRY VIO RED (208V) 4 2 YEL
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Table 3 — 50RTG Electrical Data POWER COMPRESSOR BLOWER MAX. FUSE MINIMUM UNIT SUPPLY (each) MOTOR OR HACR CIRCUIT 50RTG BREAKER AMPACITY Voltage Hz Ph RLA LRA QTY HP FLA QTY 208/230 60 3 10.7 63.0 1 1 3.6 1 25 Amp 17.0 03 460 60 3 5.0 31.0 1 1 1.8 1 15 Amp 8.1 208/230 60 3 13.9 88.0 1 1 3.6 1 30 Amp 21.0 04 460 60 3 6.4 44.0 1 1 1.8 1 15 Amp 9.8 575 60 3 5.3 34.0 1 1 1.6 1 15 Amp 8.2 208/230 60 3 20.0 123.0 1 1 3.6 1 45 Amp 28.6 05 460 60 3 7.5 49.5 1 1 1.8 1 15 Amp 11.2 575 60 3 6.4 40.0 1 1 1
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Table 5 — 50RTG04 Blower Performance EXTERNAL STATIC PRESSURE (in. wg) SCFM AIRFLOW 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 BHP 0.26 0.30 0.33 0.36 0.40 0.42 1300 RPM 633 694 755 812 869 925 Turns Out 5 3.5 4.5 3.5 2.5 1.5 B BHP 0.33 0.36 0.40 0.43 0.46 0.50 0.53 Operation Not Recommended 1400 RPM 668 725 782 836 890 943 995 Turns Out 4 3.0 4.0 3.0 2.0 1.0 0.5 BHP 0.418 0.45 0.48 0.52 0.55 0.58 0.62 0.65 1500 RPM 712 766 819 871 922 970 1017 1063 Turns Out 3.0 4.5 3.5 2.5 1.5 0.5 3.5 3.0 BHP 0.5
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Table 7 — 50RTG07 Blower Performance EXTERNAL STATIC PRESSURE (in. wg) SCFM AIRFLOW 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 BHP 0.42 0.46 0.51 0.56 0.62 0.67 0.73 0.78 1950 RPM 620 664 707 750 792 832 870 908 Operation Not Recommended Turns Out 4.5 3.5 2.5 4.5 3.5 2.5 2.0 1.5 B BHP 0.56 0.62 0.67 0.73 0.78 0.85 0.90 0.97 1.03 1.10 1.17 2200 RPM 675 716 755 793 831 869 905 941 975 1007 1038 Turns Out 3 2.0 4.5 3.5 3.0 2.0 1.5 0.5 5.0 3.0 2.5 BHP 0.70 0.76 0.83 0.88 0.95 1.00 1.07
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Table 9 — 50RTG10 Blower Performance EXTERNAL STATIC PRESSURE (in. wg) SCFM AIRFLOW 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 BHP 0.69 0.76 0.83 0.89 0.96 1.02 1.09 1.16 1.22 1.29 1.36 1.43 1.50 1.57 3000 RPM 563 596 628 658 688 718 746 773 800 826 851 876 900 923 Turns Out 4.5 3.5 2.5 1.5 1.0 4.0 3.5 3.0 2.5 2.0 1.5 0.5 0.0 2.5 B BHP 0.89 0.96 1.03 1.10 1.18 1.24 1.32 1.39 1.46 1.54 1.62 1.69 1.77 1.85 3300 RPM 604 635 664 693 721 748 775 801 827 852 876 900 923 946 C Turns Out 3
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Table 11 — 50RTG15 Blower Performance EXTERNAL STATIC PRESSURE (in. wg) SCFM AIRFLOW 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 BHP 0.68 0.78 0.88 0.98 1.08 1.17 1.28 1.39 1.43 1.54 1.65 1.76 Operation Not 4500 RPM 465 506 545 582 617 650 681 711 740 768 795 821 Recommended Turns Out 5.0 3.5 2.5 4.5 4.0 3.5 2.5 2.0 1.0 4.0 3.5 3.0 BHP 0.87 0.98 1.09 1.20 1.31 1.42 1.52 1.65 1.76 1.87 1.94 2.07 2.16 2.31 5000 RPM 493 531 568 603 636 669 701 732 762 791 819 846 872 897 Turns Out 4.0 3
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Step 8 — Low Voltage Wiring THERMOSTAT CONNECTIONS — The thermostat should be wired directly to the Aquazone™ control board. See Fig. 4 and 5. WATER FREEZE PROTECTION — The Aquazone control allows the field selection of source fluid freeze protection points through jumpers. The factory setting of jumper JW3 (FP1) is set for water at 30 F. In earth loop applications, jumper JW3 should be clipped to change the setting to 13 F when using antifreeze in colder earth loop applications. See Fig. 6. AIR
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10. System Controls: To ensure that no catastrophic system D Control Jumper Settings failures occur, verify that system controls are functioning WATER COIL FREEZE PROTECTION (FP1) LIMIT and that the sequencing is correct. SETTING — Select jumper 3, (JW3-FP1 Low Temp) to 11. Freeze Protection for Water System: Verify that freeze choose FP1 limit of 10 F or 30 F. To select 30 F as the limit, DO protection is provided for the building loop water system NOT clip the jumper. To select 10 F as the l
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Boilerless Changeover Temperature — Switch 8 on S1 pro- DIGITAL NIGHT SET BACK (NSB) — In this configura- vides selection of boilerless changeover temperature set point. tion, the relay will be ON if the NSB input is connected to Select OFF for set point of 50 F or select ON for set point ground C. of 40 F. NOTE: If there are no relays configured for digital NSB, then If switch 8 is set for 50 F, then the compressor will be used the NSB and OVR inputs are automatically configured for for heati
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NOTE: Three factors determine the operating limits of a unit: 5. Air temperature drop across the coil should be checked (1) entering air temperature, (2) water temperature and (3) when compressor is operating. Air temperature drop ambient temperature. Whenever any of these factors are at a should be between 15 and 25 F. minimum or maximum level, the other two factors must be at a Unit Start-Up Heating Mode normal level to ensure proper unit operation. See Table 15. NOTE: Operate the unit in heat
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6. Open the return valve to send a pressure surge through Antifreeze — In areas where entering loop temperatures the loop to purge any air pockets in the piping system. drop below 40 F or where piping will be routed through areas subject to freezing, antifreeze is needed. 7. A noticeable drop in fluid level will be seen in the flush cart tank. This is the only indication of air in the loop. Alcohols and glycols are commonly used as antifreeze agents. Freeze protection should be maintained to 15
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HEATING STAGE 3 — In Heating Stage 3 mode, the Fan OPERATION Enable, Fan Speed and Compressor relays remain on. The EH1 Power Up Mode — The unit will not operate until all the output is turned on immediately. With continuing Heat Stage 3 inputs, terminals and safety controls are checked for normal demand, EH2 will turn on after 10 minutes. EH1 and EH2 are operation. turned off immediately when the Heating Stage 3 demand is re- moved. The control reverts to Heating Stage 2 mode. NOTE: The compres
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Table 19 — C Control Current LED Status again satisfy the thermostat used to terminal Y. Once the ther- and Alarm Relay Operations mostat input calls are satisfied, the control will continue normal operation. LED STATUS DESCRIPTION OF OPERATION ALARM RELAY NOTE: If 3 consecutive faults occur without satisfying the Normal Mode Open thermostat input call to terminal Y, the control will go into Cycle On Normal Mode with lockout mode. The last fault causing the lockout is stored in (closed 5 sec.,
