York FCHP090 - User Manual

This document describes the installation, operation, and maintenance of Split-System Heat Pumps Indoor Units, specifically models FCHP090 and FDHP120.

Function Description:

These units are completely assembled indoor units designed for use in split-system heat pump applications. They include a well-insulated cabinet, a copper tube/aluminum fin coil, throw-away filters, a centrifugal blower, a blower motor, an adjustable V-belt drive, a blower motor contactor, and a small holding charge of an inert gas. They also feature a filter-drier, an expansion valve, and a distributor for the cooling cycle, plus a check valve for proper refrigerant flow during both cooling and heating cycles. These units are designed to provide conditioned air for indoor spaces, working in conjunction with a matching outdoor unit.

Important Technical Specifications:

Models: FCHP090 (7-1/2 Ton Nominal Cooling Capacity @ 60 Hz) and FDHP120 (10 Ton Nominal Cooling Capacity @ 60 Hz).
Coil:
- FCHP090: 3 rows deep x 24 rows high, 45.5 inches finned length, 7.6 sq ft face area.
- FDHP120: 4 rows deep x 32 rows high, 45.5 inches finned length, 10.1 sq ft face area.
- Common: 3/8 inch copper tube OD, 13 aluminum fins per inch.
Centrifugal Blower: Forward Curve type, 15 x 15 inches diameter x width.
Blower Motor:
- FCHP090: 1-1/2 HP nominal rating.
- FDHP120: 2 HP nominal rating.
- Common: 1750 RPM, solid base, 56 frame, 1.15 service factor, inherent protection, permanently lubricated ball bearings.
Filters: Throwaway type, 16" x 25" x 1" (4 per unit), total face area 11.1 sq ft.
Refrigerant: R-22.
- FCHP090: 12.0 lbs pumpdown capacity.
- FDHP120: 22.0 lbs pumpdown capacity.
Unit Weight (Shipping/Operating):
- FCHP090: 405 lbs (shipping), 365 lbs (operating).
- FDHP120: 440 lbs (shipping), 400 lbs (operating).
Accessory Operating Weights (Lbs.):
- Electric Heaters: 10 KW (63-66 lbs), 16 KW (66-71 lbs), 26 KW (71-74 lbs), 36 KW (74-74 lbs).
- Supply Air Plenum: 102 lbs.
- Base: 60 lbs.
- Return Air Grille: 15 lbs.
Voltage Codes: -S = 208/230/460-3-60.
Application Data (Entering Air Temperatures):
- Cooling (wb): 57-72°F.
- Heating (db): 50-80°F (system may operate below 50°F for short periods during warm-up).
Supply Air CFM:
- FCHP090: 2400-3600 CFM.
- FDHP120: 3200-4800 CFM.
Electrical Data (FLA, Max Fuse Size, Max Wire Length):
- FCHP090 (1-1/2 HP): 208V (5.3 FLA, 10A fuse, 207ft wire), 230V (5.8 FLA, 10A fuse, 209ft wire), 460V (2.7 FLA, 5A fuse, 897ft wire).
- FDHP120 (2 HP): 208V (7.5 FLA, 10A fuse, 146ft wire), 230V (6.8 FLA, 10A fuse, 178ft wire), 460V (3.4 FLA, 5A fuse, 712ft wire).
Control Wire Sizing: Ranges from #19 Solid (130 ft) to #12 Stranded (730 ft) depending on total circuit length.

Usage Features:

Installation Flexibility: Units are shipped for vertical installation but can be converted for horizontal installation by reversing the solid bottom panel and the return air duct flange.
Mounting Options: Can be set directly on a floor or platform, or suspended from above using four 3/8"-16 weld nuts provided in the unit frame for horizontal installations.
Accessory Integration: Designed to accommodate field-installed accessories such as supplemental resistance heaters, a supply air plenum, a return air grille, and a base.
Duct Connections: Ductwork should be sized no smaller than the unit flanges or electric heater flanges. Flexible collars are recommended to minimize noise and vibration.
Refrigerant Piping: Uses hard drawn copper tubing, with long radius ells recommended. Brazing with Sil-Fos 5 or equivalent is required for copper-to-copper joints. The vapor line must be insulated.
Drain Connection: A 7/8" OD drain connection extends through the right-hand side of the cabinet. A trap at least 2-1/2" deep is required to prevent condensate overflow due to negative static pressure from the blower.
Blower Adjustment: Features an adjustable V-belt drive and motor pulley to fine-tune supply air CFM based on system requirements. Pulleys are factory-aligned and set to 3 "turns open" but can be adjusted in half-turn increments.
Clearances: Minimum clearances are specified for proper operation and service, including 24" for return air and supply air openings, 52" for piping connections, 12" for the side opposite piping, and sufficient clearance for power/control wiring and drain line trapping at the bottom.
Safety: Includes warnings about proper rigging, handling, and the importance of adhering to national and local safety codes, as well as precautions against improper installation leading to injury or property damage. Provisions for refrigerant recovery are emphasized.

Maintenance Features:

Indoor Coil Cleaning: Regular cleaning is necessary to ensure good system performance. Dirt accumulation can be removed with a brush, vacuum cleaner, or, if extremely dirty, an industrial-grade detergent and hose.
Drain Pan Inspection: The condensate drain pan should be inspected regularly to ensure proper drainage and prevent overflow.
Filter Replacement: Filters must be replaced as often as necessary to maintain good airflow and filtering action, preventing loss of capacity and efficiency. The filter access panel location is shown in the unit drawing.
Lubrication: Blower shaft and motor bearings are permanently lubricated and do not require additional lubricant.
Belt Maintenance: Belt tension should be maintained to extend belt life. Belts should be replaced when signs of failure appear.
Blower Motor Pulley Adjustment: After initial installation and balancing, the supply air motor pulley may need readjustment if the CFM is outside specified values. Regular checks for belt tightness and alignment are recommended.
Troubleshooting: Instructions are provided for checking supply air CFM using an inclined manometer and a pressure drop curve, as well as for correcting blower rotation direction by reversing motor leads.
Owner Education: Installers are instructed to secure owner's approval and teach them about disconnect switches, thermostat operation, temperature settings, defrost cycle control, and anti-cycle timer.