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PF4MNB
DIRECT EXPANSION
FAN COIL UNIT
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
SAFETY CONSIDERATIONS
INTRODUCTION
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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.
Installation Instructions
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FOR R410A REFRIGERANT
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
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injury or product and property damage. NOTE is used to highlight
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suggestions which will result in enhanced installation, reliability, or
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operation.
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ELECTRICAL OPERATION HAZARD
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Failure to follow this warning could result in personal injury
or death.
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Before installing or servicing unit, always turn off all power to
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unit. There may be more than 1 disconnect switch. Turn off
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accessory heater power if applicable. Lock out and tag switch
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with a suitable warning label.
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CUT HAZARD
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Failure to follow this caution may result in personal injury.
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Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing and gloves when
handling parts.
Model PF4MNB Fan Coils are designed for flexibility and can be
used for upflow, horizontal, or downflow (kit required) and
manufactured and mobile home applications. These 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. Because of this, the units need special attention in the
condensate pan and drain connection area and when brazing
tubing.
These units are designed specifically for R−410A refrigerant and
must be used only with 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.
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Factory−authorized, field−installed electric heater packages are
available in sizes 5 through 30kW. See Product Data literature for
available accessory kits.
SIZES 019 TO 061
WARNING
CAUTION
INTRODUCTION
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Table of Contents
Summary of Contents for Payne PF4MNB
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Page 1: Table Of Contents
Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified Model PF4MNB Fan Coils are designed for flexibility and can be installer or agency must use factory−authorized kits or accessories used for upflow, horizontal, or downflow (kit required) and when modifying this product. -
Page 2: Heater Packages
HEATER PACKAGES B. Downflow Installation In this application, field conversion of the evaporator is required Factory−approved, field−installed, UL listed heater packages are using accessory downflow kit along with an accessory base kit. available from your equipment supplier. See unit rating plate for a Use fireproof resilient gasket, 1/8 to 1/4−in (3 to 6 mm) thick, list of factory−approved heaters. - Page 3 6. Make sure the pan cap in the fitting door is properly seated on the fitting door to retain the low air leak rating of the COIL unit. FA CT OR Y SHIPPED BRACKET HORIZONTAL LEFT APPLICATION 7. Add gaskets from kit KFAHD per kit instructions. COI L SUPPORT RAIL...
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Page 4: Step 3 - Air Ducts
and fasten to wall stud of structure using 5/16−in. lag DRAIN PAN DRAIN PAN SUPPORT BRACKET SUPPORT BRACKET screws. Typical both sides of fan coil. b. If fan coil is against wall, secure fan coil to wall stud using 1/8−in (3 mm) thick right−angle brackets. Attach brackets to fan coil using no. - Page 5 in transit or installation. If a different control package is required, FAN COIL THERMOSTAT see unit rating plate. CAUTION PROPERTY DAMAGE HAZARD Failure to follow this caution may result in product or property damage. AIR COND. If a disconnect switch is to be mounted on unit, select a location where drill or fastener will not contact electrical or refrigerant components.
- Page 6 NOTE: Use UL−listed conduit and conduit connector for A09388 Fig. 12 − Wiring Layout Heat Pump Unit connecting supply wire(s) to unit to obtain proper grounding. (Cooling and 2−Stage Heat for Manufactured Housing) Grounding may also be accomplished by using grounding lugs provided in control box.
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Page 7: Step 5 - Refrigerant Tubing Connection And Evacuation
2” MIN TXV and factory−made joints. (51 mm) Step 6 — Refrigerant Flow−Control Device The PF4MNB fan coil is equipped with R−410A refrigerant TXV. A03002 Fig. 15 − Recommended Condensate Trap Use outdoor units designed for R−410A refrigerant only. CAUTION... -
Page 8: Step 8 - Accessories
CAUTION FAN COIL HEAT PUMP THERMOSTAT (CONTROL) (CONTROL) PROPERTY DAMAGE HAZARD Failure to follow this caution may result in product or property damage. Shallow running traps are inadequate and DO NOT allow proper condensate drainage. (See Fig. 17.) FAN HUMIDIFIER RELAY 115V HUMIDISTAT... -
Page 9: Start−Up Procedures
C. Heat Pump Heating with Auxiliary Electric Heat CAUTION Thermostat energizes R to G, R to Y, and R to W. G energizes fan relay on PCB which completes circuit to indoor blower motor. W energizes electric heat relay(s) which completes circuit to heater UNIT COMPONENT HAZARD element(s). -
Page 10: Airflow Performance Tables
EXTERNAL STATIC (in. wc) MODEL & SIZE BLOWER SPEED 0.10 0.20 0.30 0.40 0.50 0.60 Tap 5 Tap 4 PF4MNB 019 Tap 3 Tap 2 Tap 1 Tap 5 Tap 4 Tap 3 PF4MNB 025 Tap 2 Tap 1 Tap 5... - Page 11 AIRFLOW PERFORMANCE TABLES (cont.) Table 2 – Air Delivery Performance Correction Component Pressure Drop (in. wc) at Indicated Airflow (Dry to Wet Coil) SIZE 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 0.034 0.049 0.063 0.016 0.027 0.038 0.049 0.059...
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Page 12: R−410A Quick Reference Guide
We believe in providing high quality learning experiences both online and in the classroom. Access My Learning Center with your HVACpartners credentials at MLCtraining.com. Please contact us at mylearning@utc.com with questions. Copyright 2019 Payne Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 Edition Date: 05/19 Catalog No. IM-PF4MNB-05 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.