25VNA8 Infinityr 18VS Variable Speed Heat Pump with Puronr Refrigerant Installation Instructions NOTE: Read the entire instruction manual before starting the installation. TABLE OF CONTENTS PAGE NO. SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 INSTALLATION RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Indoor Thermostat Control Options Information in these installation instructions pertains only to 25VNA8 series units. SAFETY CONSIDERATIONS Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause death, personal injury, or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance.
7. Avoid direct tubing contact with water pipes, duct work, floor joists, wall studs, floors, and walls. 8. Do not suspend refrigerant tubing from joists and studs with a rigid wire or strap which comes in direct contact with tubing (see Fig. 1). 9. Ensure that tubing insulation is pliable and completely surrounds vapor tube. 10. When necessary, use hanger straps which are 1 in. wide and conform to shape of tubing insulation. (See Fig. 1.) 11.
Step 3 — Clearance Requirements When installing, allow sufficient space for airflow clearance, wiring, refrigerant piping, and service. Allow 24 in. (609.6 mm) clearance to service end of unit and 48 in. (1219.2 mm) (above unit. For proper airflow, a 6--in. (152.4 mm) clearance on 1 side of unit and 12--in. (304.8 mm) on all remaining sides must be maintained. Maintain a distance of 24 in. (609.6 mm) between units. Position so water, snow, or ice from roof or eaves cannot fall directly on unit.
Outdoor Unit Connected to Factory-- Approved Indoor Unit Sweat Connections Install Liquid-- Line Filter Drier Indoor Refer to Fig. 4 and install filter drier as follows: 1. Braze 5--in. (127 mm) liquid tube to the indoor coil. 2. Wrap filter drier with damp cloth. 3. Braze filter drier to above 5--in. (127 mm) liquid tube. 4. Connect and braze liquid refrigerant tube to the filter drier.
Step 7 — Make Electrical Connections Connect Control Wiring-- Infinity Touch Connect to Infinity connections. Only two wires (AB) to Infinity capable indoor unit (furnace or fan coil) are required. Connect C if additional grounding is required (see Fig. 7). IMPORTANT: This system requires the power supplied to the outdoor unit, and the indoor unit, for the UI to communicate with the outdoor unit. WARNING ! ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death.
Thermidistat Fan Coil O RVS Cooling O/B W2 W1 Heat Pump O W1 J2 Jumper on Control Board Heat Stage 3 W/W1 W2 Heat/Cool Stage 1 Y1 / W2 Y1 Y1 Heat/Cool Stage 2 Y/Y2 Y/Y2 Y2 Fan G G 24VAC Hot Heating Rh R 24VAC Hot Cooling Rc Dry Contact 1 D1 Dry Contact 2 D2 DH 24VAC Common C C Humidify HUM Outdoor Air Temp OAT Remote Room Sensor RRS OAT/RRS Com SRTN Jumper Wire Required for Single-Stage R J1 Jumper on Control Board C Humidifier Solenoid Valve Outdoor Sensor Remote
Step 8 — Compressor Crankcase Heater Step 9 — Install Accessories This compressor has an internal crankcase heater. Furnish power to the unit a minimum of 24 hr before starting the unit for the first time. To furnish power to heater only, set thermostat to OFF and close electrical disconnect to outdoor unit. Power is not required to the indoor unit or User Interface for proper operation of heater.
Follow these steps to properly start up the system: 1. After system is evacuated, close the disconnects to energize the ID and OD units to access the user interface (UI), Keep system in off mode. Under the Advanced function menu, on the Infinity Touch Control, access the REQUIRED CHARGE CALCULATION screen. Enter the lineset length and vapor tube diameter. The user interface (UI) will now display the required charge adjustment (see Fig.
A14021 Fig. 12 -- AOC Control Board Crankcase Heater Operation Communication and Status Function Lights This unit has an internal crankcase heater that will be energized during the off cycle and is intelligently demanded by the system to prevent the compressor from being the coldest part of the system thus enhancing the reliability. The crankcase heater will function as needed any time the outdoor unit is powered.
The control board accumulates compressor run time. As the accumulated run time approaches the selected defrost interval time, the control board monitors the coil temperature sensor for a defrost demand. If a defrost demand exists, a defrost cycle will be initiated at the end of the selected time interval. A defrost demand exists when the coil temperature is at or below 32_F (0_C) for 4 minutes during the interval.
Table 3 – Required Charge Adjustment for Indoor Coil Model Furnace or Fan Coil Model Number CNPV*36** CAP**36** CSPH*36** FE4A or FV4(A,B,C)NF002 FE4A or FV4(A,B,C)N(B,F)003 CNPV*42** CAP**42** CNPV*48** CAP**48** CSPH*48** FE4A or FV4(A,B,C)N(B,F)005 CNPV*60** CSPH*60** CAP**60** FE4A or FV4(A,B,C)NB006 25VNA824A003 25VNA825A003 25VNA836A003 25VNA848A003 0 0 0 0 0 0 0 +0.75 +0.75 +0.75 +0.75 N/A N/A N/A N/A 0 0 0 0 0 0 0 +0.75 +0.75 +0.75 +0.75 N/A N/A N/A N/A 0 0 0 0 0 0 0 +0.75 +0.75 +0.75 +0.
Heating Check Chart Procedure (See Fig.16 - 18) (Communicating / Non-- communicating Systems) In heating mode, the required charging method is by weigh--in. On new installations or complete recharge, refer to the unit 0 and indoor fan coil / furnace coil per Table 3 for additional charge needed. Refrigerant charge adjustment amount for adding or removing 0.6 oz/ft (17.74 g/m) of 3/8 liquid line above or below 15ft (4.57 m) respectively.
Step 13 — Pumpdown & Evacuation ! 4. The unit will continue to run until high or low pressure switches open. Close vapor service valve once compressor shuts down. 5. Remove power from indoor and heat pump unit prior to servicing unit. 6. A quantity of charge will remain in isolated section of system dependent on ambient temperature and overall system charge. This charge must be manually recovered. A recovery system will be required to remove final quantity of refrigerant from indoor coil and line set.
MAJOR COMPONENTS Variable Speed Compressor This unit contains a variable speed rotary compressor that has a wide operating range. It operates on a variable 3 phase sine wave provided by the inverter. This compressor can only be operated by the specific inverter supplied with the unit. Variable speed Control Board ! CAUTION EQUIPMENT DAMAGE HAZARD Failure to follow this caution may result in equipment damage and/or improper operation. Do not attempt to apply line voltage directly to the compressor.
TROUBLESHOOTING Systems Communication Failure If communication is lost with the User Interface (UI), the control will flash the appropriate fault code (see Table 7). Check the wiring to the User Interface and the indoor and outdoor units and power. Model Plug Each control board contains a model plug. The correct model plug must be installed for the system to operate properly (see Table 4). The model plug is used to identify the type and size of unit to the control.
Refer to Table 5 and Fig. 21 and 22 for resistance values versus temperature. Table 5 – 10K/50Kohm Resistance Values vs Temperature RESISTANCE (ohms) 10.0 + / --- 2.3% 32.6 + / --- 3.2% 85.5 + / --- 3.4% 50Kohm 125.0 (257.0) 75.0 (167.0) 25.0 (77.0) 1.7 + / --- 1.6% 7.40 + / --- 2.0% 50.0 + / --- 2.
Suction Thermistor (OST) Variable Speed Compressor Winding Resistance Suction Thermistor is used for assisting in EXV control and must be secured on the suction tube and aligned longitudinally to the vertical surface of the tube axis (see Fig. 25). This compressor operates with 3--phase variable frequency PWM variable voltage. For troubleshooting certain fault codes related to compressor resistances, follow these steps: 1.
Status Codes Table 7 shows the status codes flashed by the amber status light. Most system problems can be diagnosed by reading the status code as flashed by the amber status light on the control board. The codes are flashed by a series of short and long flashes of the status light. The short flashes indicate the first digit in the status code, followed by long flashes indicating the second digit of the error code. The short flash is 0.25 seconds ON and the long flash is 1.0 second ON.
Table 7 – Troubleshooting SERVICE * FLASH CODE RESET TIME (Minimum) Minutes (Amber LED) AMBER LED DESCRIPTION Standby Variable Capacity Mode Variable Speed Range Cutback Communications Loss Invalid Model High Pressure Switch Open Low Pressure Trip Control Fault Brownout Event Lost Inverter Communication 230VAC Dropout-Reset Event Outdoor Discharge Temp Sensor Fault Outdoor Air Temp Sensor Fault Suction Temp Sensor Fault Coil Temp Sensor Fault OAT-OCT Thermistor Out of Range Suction Pressure Sensor Fault
FINAL CHECKS IMPORTANT: Before leaving job, be sure to do the following: 1. Ensure that all wiring is routed away from tubing and sheet metal edges to prevent rub--through or wire pinching. 2. Ensure that all wiring and tubing is secure in unit before adding panels and covers. Securely fasten all panels and covers. 3. Tighten service valve stem caps to 1/12--turn past finger tight. 4. Leave User’s Manual with owner. Explain system operation and periodic maintenance requirements outlined in manual. 5.
Copyright 2014 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Edition Date: 05/14 Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
