How it Works
Carrier
Loading...
PF4MNX
Table of contents
Loading...

Carrier PF4MNX Installation Instructions

PF4MNX FAN COIL UNITS SIZES 018 TO 060

Installation Instructions

NOTE: Read the entire instruction manual before starting the installation.
CAUTION
!

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. The qualified installer or agency must use factory-authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing and work gloves. Have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions included in literature and attached to the unit. Consult local building codes and the current editions of the National Electrical Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical Code CSA C22.1.
Recognize safety information. This is the safety-alert symbol . When you see this symbol on the unit and in instruction manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, and CAUTION. These words are used with the safety-alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices which
may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced
installation, reliability, or operation.
WARNING
!
PERSONAL INJURY / PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in property damage, personal injury, or death.
For continued performance, reliability, and safety, the only approved accessories and replacement parts are those specified by the equipment manufacturer. The use of non-manufacturer approved parts and accessories could invalidate the equipment limited warranty and result in fire risk, equipment malfunction, and failure. Please review manufacturer’s instructions and replacement part catalogs available from your equipment supplier.
WARNING
!
ELECTRICAL OPERATION HAZARD
Failure to maintain proper clearances could result in personal injury or death.
Before installing or servicing unit, always turn off all power to unit. There may be more than 1 disconnect switch. Turn off accessory heater power if applicable.
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts.
CAUTION
!
HOT TUBE WARNING
Failure to follow this caution could result in personal injury and/or property damage.
Refrigerant lines can reach or exceed 130 °F (54 °C). Avoid contact with the vapor header or vapor line, especially in Heating Mode. Do not service A2L refrigerant fan coils while these components are hot to avoid risk of ignition source.

Introduction

These R-410A Fan Coils designed for installation flexibility. The units leave the factory compliant with low leak requirements of less than 2% cabinet leakage rate at 0.5 inches W.C. and 1.4% cabinet leakage rate at
0.5 inches W.C. when tested in accordance with ASHRAE 193 standard. All these fan coils use a multi-tap ECM motor for efficiency. The units have be designed for upflow, downflow (kit required), and horizontal orientations, including manufactured and mobile home applications. These units require a field supplied air filter, and are designed specifically for R-410A refrigerant air conditioners and heat pumps as shipped. These units are available for systems of 18,000 through 60,000 BTUh nominal cooling capacity. Factory- authorized, field - installed electric heater packages are available in sizes 5 through 30kW. See Product Data literature for all available accessory kits.

Heater Packages

NOTE: Some heater sizes may require the removal of two screws which connect the blower housing to the fan deck (removal will not impact performance). See (Care and Maintenance on p11) and Fig. 22.
PF4MNX: Installation Instructions

Installation

Check Equipment

Unpack unit and move to final location. Remove carton taking care not to damage unit.
NOTE: Shipping block(s) that support the blower housing during transit will need to be removed (Fig. 1).
NOTE: If the door gasket is damaged or missing, the unit may not meet the ASHRAE 193 standard for cabinet air leakage. See the Product Data for this model or contact your supplier to order the gasket kit. Inspect equipment for damage prior to installation. File claim with shipping company if shipment is damaged or incomplete. Locate unit rating plate which contains proper installation information. Check rating plate to be sure unit matches job specifications.
NOTE:

Downflow Installation

In this application, field conversion of the evaporator is required using accessory downflow kit along with an accessory base kit. Use fireproof resilient gasket, 1/8" to ¼" (3 to 6 mm) thick, between duct, unit, and floor.
CAUTION
!
PRODUCT OR PROPERTY DAMAGE HAZARD
Failure to follow this warning caution may result in product or property damage.
The conversion of the fan coil to downflow requires special procedures for the condensate drains on both A-coil and Slope-coil units. The vertical drains have an overflow hole between the primary and secondary drain holes. This hole is plugged for all applications except downflow, and must be used for downflow. During conversion process, remove plastic cap covering vertical drains only and discard. Remove plug from overflow hole and discard. At completion of downflow installation, caulk around vertical pan fitting to door joint to retain low air leak performance of the unit.
NOTE: To convert units for downflow applications, refer to Installation Instructions supplied with kit for proper installation. See the Product Data or contact your supplier for the kit number. Use fireproof resilient gasket, 1/8" to ¼" (3 to 6 mm) thick, between duct, unit, and floor.
NOTE: A gasket kit is also required for all downflow applications to maintain low air leak/low sweat performance. See the Product Data or contact your supplier for the kit number.

Horizontal Installation

Units must not be installed with access panels facing up or down. All other units are factory built for horizontal left installation (Fig. 3 and
Fig. 4). When suspending unit from ceiling, dimples in casing indicate
suitable location of screws for mounting metal support straps (Fig. 3).
For horizontal applications having high return static and humid return air, the Water Management Kit may need to be used to assist in water management. See the Product Data or contact your supplier for the kit number.
NOTE: Modular units can be disassembled and components moved separately to installation area for reassembly. This process accommodates small scuttle holes and limiting entrances to installation sites (Fig. 7).

Fig. 1 – Remove Shipping Blocks

A221016A

Mount Unit

Unit can stand or lie on floor, or hang from ceiling or wall. Allow space for wiring, piping, and servicing unit. IMPORTANT: When unit is installed over a finished ceiling and/or living area, building codes may require a field-supplied secondary condensate pan to be installed under the entire unit. Some localities may allow as an alternative, the running of a separate, secondary condensate line. Consult local codes for additional restrictions or precautions.

Nuisance sweating may occur if the unit is installed in a high humidity environment with low airflow.

Upflow Installation If return air is to be ducted through a floor, set unit on floor over opening and use 1/8" to ¼" (3 to 6 mm) thick fireproof resilient gasket between duct, unit, and floor. Side return is a field option on slope coil models. Cut opening per dimensions (Fig. 2). A field-supplied bottom closure is required.
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
CAUTION
!
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in product or property damage.
For optimum condensate drainage performance in horizontal installations, unit should be leveled along its length and width.
2
PF4MNX: Installation Instructions
A COIL
UNITS
POWER ENTRY
OPTIONS
LOW VOLT ENTRY OPTIONS
FIELD MODIFIED SIDE RETURN LOCATION FOR SLOPE COIL UNITS ONLY
FIELD SUPPLIED RETURN PLENUM
UPFLOW/DOWNFLOW
SECONDARY DRAIN
UPFLOW/DOWNFLOW
PRIMARY DRAIN
UNIT
018, 024
025 - 030
A 12" (305 mm) 17" (432 mm)
A
1.5" (38 mm)
2.5" (64 mm)
19" (483 mm)
FIELD SUPPLIED SUPPLY DUCT
UPFLOW/DOWNFLOW
SECONDARY DRAIN
UPFLOW/DOWNFLOW
PRIMARY DRAIN
036 19" (483 mm)
018 - 048 21" (533 mm) FRONT SERVICE 060 - 060 24" (610mm) CLEARANCE

Horizontal Right Conversion of Units with Slope Coils

NOTE: A gasket kit is required for horizontal slope coil conversion to maintain low air leak/low sweat performance. See the Product Data or contact your supplier for the kit number.

1. Remove blower and coil access panels and fitting panel (Fig. 6).

2. Remove coil mounting screw securing coil assembly to right side casing flange.

3. Remove coil assembly.

4. Lay fan coil on its right side and reinstall coil assembly with condensate pan down (Fig. 5).

5. Attach coil to casing flange using previously removed coil mounting screw.

6. Make sure pan cap in fitting door is properly seated on fitting door to retain low air leak rating of the unit.

7. Add gaskets from kit.

8. Align holes with tubing connections and condensate pan connections. Reinstall access panels and fitting panel.

9. Make sure liquid and suction tube grommets are in place to prevent air leaks and cabinet sweating. Install grommets after brazing.

Horizontal Right Conversion of Units with A-Coils

1. Remove blower and coil access panels (Fig. 6).

2. Remove metal clip securing fitting panel to condensate pan. Remove fitting panel.

3. Remove 2 snap-in clips securing A-coil in unit.

4. Slide coil and pan assembly out of unit.

5. Remove horizontal drain pan support bracket from coil support rail on left side of unit and reinstall on coil support rail on right side of unit (Fig. 8).

6. Convert air seal assembly for horizontal right.

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

Fig. 2 – Slope Coil Unit in Upflow Application

a. Remove air seal assembly from coil by removing 4 screws
(Fig. 6).
b. Remove air splitter (B) from coil seal assembly by removing 3
screws (Fig. 7 inset).
c. Remove filler plate (A) and install air splitter (B) in place of filler
plate. d. Install filler plate (A) as shown in horizontal right application. e. Remove condensate troughs (C) and install on opposite tube
sheets. f. Install hose onto plastic spout.

7. Install horizontal pan on right side of coil assembly.

8. Slide coil assembly into casing. Be sure coil bracket on each corner of vertical pan engages coil support rails.

9. Reinstall 2 snap-in clips to correctly position and secure coil assembly in unit. Be sure clip with large offsets is used on right side of unit to secure horizontal pan.

10. Remove two oval fitting caps from left side of the coil, access panel, and fitting panel.

11. Remove insulation knockouts on right side of coil access panel.

12. Remove 2 oval coil access panel plugs and reinstall into holes on left side of coil access panel and fitting panel.

13. Install condensate pan fitting caps (from Step 10) in right side of coil door making sure that cap snaps and seats cleanly on back side of the coil door. Make sure no insulation interferes with seating of cap.

14. Reinstall access and fitting panels, aligning holes with tubing connections and condensate pan connections. Be sure to reinstall metal clip between fitting panel and vertical condensate pan.

15. Make sure liquid and suction tube grommets are in place to prevent air leaks and cabinet sweating.

3

A07565

PF4MNX: Installation Instructions
UNIT
FIELD SUPPLIED HANGING STRAPS
LOW VOLT ENTRY OPTIONS
POWER ENTRY OPTIONS
SECONDARY DRAIN
018-048 21" (533 mm) 060-060 24" (610 mm) FRONT SERVICE CLEARANCE (FULL FACE OF UNIT)
SECONDARY DRAIN
A-COIL
HORIZONTAL LEFT
PRIMARY DRAIN
PRIMARY DRAIN
1.75" (44 mm) FILTER ACCESS CLEARANCE
A
B C
FACTORY SHIPPED HORIZONTAL LEFT
APPLICATION
AIR SEAL ASSEMBLY
HORIZONTAL
DRAIN PAN
REFRIGERANT
CONNECTIONS
SECONDARY DRAIN
HORIZONTAL LEFT
PRIMARY DRAIN
HORIZONTAL LEFT
COIL
SUPPORT
RAIL
COIL
BRACKET
DRAIN PAN
SUPPORT BRACKET
COIL
BRACKET
COIL MOUNTING SCREW
BLOWER ASSEMBLY
REFRIGERANT CONNECTIONS
SECONDARY DRAIN
PRIMARY DRAIN
DRAINPAN
SLOPE COIL
SKI
COIL
SUPPORT
RAIL

Fig. 3 – Slope Coil in Horizontal Left Application (Factory Configuration)

Fig. 4 – A-Coil in Horizontal Left Application (Factory Configuration)

A07566

A00072A

Fig. 5 – Conversion for Horizontal Right Applications - Slope Coil

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
4
A03001
Loading...
+ 9 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use