Payne PF1MNB060000AAAA, PF1MNB070000AAAA, PF1MNB071000AAAA, PF1MNB018000AAAA, PF1MNB024000 Installation Guide

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Installation Instruction

Direct Expansion Fan Coil Units

PF1MNB

Sizes 018m071

NOTE: Read the entire instruction manual be_bre starting the installation.

This symbol -_ indicates a change from the last publication.

SAFETY CONSIDERATIONS

hnproper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock, or other conditions which may cause 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 _actory-authorized kits or accessories when modifying this product. Refer to the individual instructions

packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for brazing operations. Have fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes and National Electrical Code

(NEC) for special requirements. Recognize safety information. This is the safety-alert symbol Z_ • When you see this symbol on the unit and in instructions or manuals, be alert

to the potential for personal injury.

Understand the signal word, 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 il_iury or death. WARNING signifies hazards which could result in personal injury or

death. CAUTION is used to identify unsafe practices which would 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.

Z_ WARNING: 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. Electrical shock can cause personal injury or death.

INTRODUCTION

Model PF1MNB Fan Coil Units are designed for flexibility and can be used for upflow, horizontal, or downflow applications.

----) These units are designed to meet the low air leak requirements cun'ently in effect. Because of this, the units need special attention in the condensate pan and drain connection area and when brazing tubing. These units are available for application in systems of 18,000 through 60,000 Btuh

nominal cooling capacities. (See Fig. 2 and 3.) Factory-authorized, field-installed electric heater packages are available in 3 through 30 kw. See

Product Data for available accessory kits.

--> HEATER PACKAGES

This unit may or may not be equipped with an electric heater package. For units not equipped with _actory installed heat, a _actory-approved, field installed UL listed heater package is available from your equipment supplier. See unit rating plate lbr a list of factory approved heaters. Heaters

that are not factory approved could cause damage which would not be covered under the equipment wan'anty. If fan coil contains a factory installed

heater package, minimum circuit ampacity (MCA) and maximum fuse/breaker may be different than units with a same size field installed accessory heater. The difference is not an error and is clue to calculation difference per UL guidelines.

INSTALLATION

---> PROCEDURE I--CHECK EQUIPMENT Unpack unit and move to final location. Remove carton taking care not to damage unit.

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.

PROCEDURE 2--MOUNT UNIT

Unit can stand o1" lie on floor, or hang from ceiling o1"walh Allow space for wiring, piping, and selwicing 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 entire unit. Some localities may allow as an alternative, the running of a separate, secondary condensate line. Consult

local codes for additional restrictions or precantions.

A. Upflow Installation

If return air is to be ducted through a floor, set unit on floor over opening and use 1/8- to 1/4-m. thick fireproof resilient gasket between duct,

unit, and floor.

Side return is a field option on slope coil models. Cut opening per dimensions. (See Fig. 1.) A field-supplied bottom closure is required.

Form: IM-PF1M-04 Cancels: IM-PF1M-03 Printed in U.S.A. 1-03 Catalog No. 53PF-1M5

POWERENTRY--_

OPTIONS_

018-06021-1N.FRONTSERVICE

07024-1N. CLEARANCE

UPFLOW/_

2°w

_ IELDSUPPLIED

SUPPLYDUCT

OWVOL-

OPTIONS

UNIT A

0!8/024 12 In.

030/036 17 In.

042 !9 In.

PRIMA_

UPFLOW/DOWNFLOW

SECONDARY DRAIN II

UPFLOW/DOWN FLOW _/

PRIMARY DRAIN

Fig. l--Slope Coil Unit in Upflow Application

B. Downflow Installation

---->NOTE: To convert units for downflow applications, refer to Installation Instructions supplied with kit for proper installation. For slope fan coils,

use kit Part No. KFADC0201SLP. For A fan coils use kit Part No. KFADC0401ACL. Use fireproof resilient gasket, 1/8- to 1/4-in. thick, between

duct, unit, and floor. NOTE: Gasket kit number KFAHD0101SLP is also required Ibr all downflow applications to maintain low air lea_low sweat performance.

--_ _ CAUTION: The conversion of the fan coil to downflow requires special procedures for the condensate drains on both

A-coil and Slope units. The vertical drains have an overflow hole between the primary and secondary drain holes. This hole is plugged for all

applications except downflow, but must be used for downflow. During the conversion process, remove the plastic cap covering the vertical drains only and discard. Remove the plug from

the overflow hole and discard. At completion of the downflow installation, caulk around the vertical pan fitting to door joint to retain the low air leak performance of the unit.

FIELD MODIFIED

A SIDE RETURN

LOCATION FOR UNITS ONLY

SLOPE COIL

FIELD SUPPLIED RETURN PLENUM

A00069

C. Horizontal Installation

Units must not be installed with access panels facing up or down. Units are factory built for horizontal left installation (See Fig. 2 and 6.) When

suspending unit from ceiling, dimples in casing indicate suitable location of screws for mounting metal support straps. (See Fig. 2.)

CAUTION: To ensure proper drainage for horizontal installations, unit must be installed level with its long direction or

slightly raised at the return air inlet 1/4-in., and pitched slightly towards condensate drain, 1/4-in. to 1/2-in.

NOTE: Modular units (sizes 070, 071) can be disassembled and components moved separately to installation area for reassembly. This process accommodates small scuttle holes and limiting entrances to installation sites. (See Fig. 3.)

HORIZONTAL RIGHT CONVERSION OF UNITS WITH SLOPE COILS

NOTE: Gasket kit number KFAHD010ISLP is required 1"o1"horizontal slope coil conversion to maintain low air leak/low sweat pertbrmance.

i. Remove blower and coil access panels and fitting panel. (See Fig. 4.)

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

3. Remove coil assembly.

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

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

LOW VO LT ENTRY OPTIONS

POWER ENTRY OPTIONS

FIELD _ _ DRAIN , DRAIN SUPPLIED

HANGING

STRAPS

UNIT (FULL FACE

SECONDARY DRAIN

Fig. 2--Slope Coil Unit in Horizontal Left Application

018-060 21-IN. 070 24-1N.

FRONT SERVICE

CLEARANCE

[ OF UNIT)

" ccgss

!RIMARY

A00070

BLOWER BOX ----7

2 SCREWS _!

EEWS

BRACKET

2 SCREWS

COIL BOX

Fig, 3--Removal of Brackets on Modular Unit

A95293

COIL

SUPPORT

RAIL

COIL MOUNTING BLOWER

ASSEMBLY

SLOPE COIL

SUPPORT

BRACKET

DRAIN

SUPPORT

BRACKET

SUPPORT

SKI

•PRIMARY DRAIN

CONNECTIONS

SECONDARY DRAIN

-e Fig. 4--Conversion for Horizontal Right Applications Using a Slope Coil

SEAL

CONNECTIONS

RAIL

COIL_

RAIL

HORIZONTAL

RIGHT

APPLICATION

A03001

BRACKET

DRAIN PAN

HORIZONTAL RIGHT

SECONDARY DRAIN HORIZONTAL RIGHT

Fig. 5--Conversion for Horizontal Right Applications Using A-Coil

----) 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 unit.

---) 7. Add gaskets from kit KFAHD per kit instructions.

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

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

HORIZONTAL RIGHT CONVERSION OF UNITS WITH A-COIL

i. Remove blower and coil access panels. (See Fig. 5.)

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

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

A00071

FACTORY SHIPPED COIL

HORIZONTAL LEFT

APPLICATION

COIL

SUPPORT

RAIL

DRAIN PAN

SUPPORT

BRACKET

COIL

HORIZONTAL

DRAIN PAN

AIR SEAL \ ASSEMBLY___

PRIMARY DRAIN

HORIZONTAL LEFT

SECONDARY DRAIN

HORIZONTAL LEFT

REFRIGERANT

CONNECTIONS

A00072

Fig. 6---A-Coil in Horizontal Left Application (Factory Ready)

4. Slide coil and pan assembly out of unit.

5. Remove horizontal &ain pan support bracket from coil support rail on left side of unit and reinstall on coil support rail on right side of unit.

6. Convert air-seal assembly for horizontal right a. Remove air-seal assembly from coil by removing 4 screws. (See Fig. 5.)

b. Remove air splitter (B) from coil seal assembly by removing 3 screws. (See Fig. 5 _actory-shipped 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 of£set is used on right side of unit to secure horizontal pan.

i0. Remove two oval fitting caps from the left side of the coil door 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 (fi'om Step 10) in the right side of the coil door making sure that the cap snaps and seats cleanly on the back side of the coil door. Make sure no insulation interferes with seating of the 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.

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

PROCEDURE 3--AIR DUCTS

Connect supply-air duct over outside of the 3 4-in. flanges provided on supply-air opening. Secure duct to flange, using proper fasteners for the type of duct used, and seal duct-to-unit joint. If return-air flanges are required, install factory-authorized accessory kit.

Use flexible connectors between ductwork and unit to prevent transmission of vibration. When electric heater is installed, use heat-resistant material for flexible connector between ductwork and unit at discharge connection. Ductwork passing through unconditioned space must be

insulated and covered with vapor barrier. Units equipped with 20-30kw electric heaters require a 1-in. clearance to combustible materials for the first 36 in. of supply duct.

A. Ductwork Acoustical Treatment

Metal duct systems that do not have a 90 ° elbow and 10 ft of main duct to first branch takeoff may require internal acoustical insulation lining. As an alternative, fibrous ductwork may be used if constructed and installed in accordance with the latest edition of SMACNA construction

standard on fibrous glass ducts. Both acoustical lining and fibrous ductwork shall comply with National Fire Protection Association as tested by UL Standard 181 for Class 1 air ducts.

PROCEDURE 4--ELECTRICAL CONNECTIONS NOTE: See B for electrical connection of size 071.

A. Sizes 018 Through 070

All products fi'om the factory utilize a printed-circuit board (PCB) which has a low-voltage circuit protective fuse (5 amp), fan motor speed tap

selection terminal (SPT), and time delay relay (TDR) jumper. To disable the TDR feature, cut the JWl jumper wire. (See Fig. 7.)

When a _actory-approved accessory heater package has been installed, check all factory wiring per unit wiring diagram and inspect factory wiring

connections to be sure none were loosened in transit or installation. See unit rating plate for approved heater packages.

Z_ CAUTION: If a disconnect switch is to be mounted on the unit, select a location where drill or fastener will not contact

electrical or refrigerant components.

Before proceeding with electrical connections, make certain that supply voltage, fi'equency, phase, and ampacity are as specified on unit rating plate. See unit wiring label for proper field high- and low-voltage wiring. Make all electrical connections in accordance with the NEC and any

local codes or ordinances that may apply. Use copper wire only. The unit nmst have a separate branch electric circuit with a field-supplied disconnect switch located within sight from and readily accessible fi'om

the unit.

On units with a factory installed disconnect with pull-out removed, service and maintenance can be safely performed on only the load side of control package.

Z_ WARNING: Field wires on the line side of the disconnect found in the fan coil unit remain live, even when the pull-out

is removed. Service and maintenance to incoming wiring can not be performed until the main disconnect switch (remote to

the unit) is turned off. Failure to do so will result in electrical shock causing personal injury or death.

LINE-VOLTAGE CONNECTIONS

If unit contains an electric heater, remove and discard power plug (if equipped) from fan coil and connect male plug from heater to female plug fi'om unit wiring harness. (See Electric Heater Installation Instructions.).

For units without electric heat:

i. Connect 208/230v power leads fi'om field disconnect to yellow and black stripped leads.

2. Connect ground wire to unit ground lug.

NOTE: Units installed without electric heat should have a field-supplied sheet metal bloek-offplate covering the heater opening. This will reduce air leakage and formation of exterior condensation.

24-V CONTROL SYSTEM

i. Connection To Unit Wire low voltage in accordance with wiring label on blower. (See Fig. 8, 9, 10, ll, and 12.) Use No. 18 AWG

color-coded, insulated (35°(; minimum) wire to make the low-voltage connections between the thermostat, the unit, and the outdoor equipment. If thermostat is located more than 100 ft from unit (as measured along the low-voltage wire), use No. 16 AWG color-coded,

insulated (35°C minimum) wire. All wiring nmst be NEC (?lass 1 and must be separated fi'om incoming power leads. Refer to outdoor unit

wiring instructions for any additional wiring procedure recommendations.

2. Transformer Inlbrmation Transformer is _actory wired for 230-v operation. For 208-v applications, disconnect black wire fi'om 230-v terminal on transformer and connect it to the 208-v terminal. (See Fig. 13.)

3. Heater Staging The controls are factory-circuited for single-stage operation. For 2-stage operation, use outdoor thermostat kit KHAOT0301FST, and for 3-stage use both kits KHAOT0201SEC and KHAOT0301FST. When 2 stages are desired, cut W3 at the W2 wire

nut, strip and reconnect per the thermostat kit instruction. (See Fig. 11.) When 3 stages are desired, cut the W2 wire nut off and discard.

Strip W2, W3, and E and reconnect per thermostat kit instructions. (See Fig. 12.)

-_ Fig. 7--Fan Coil Printed-Circuit Board 6

A03010

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