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48EZ(N)---A
Comfortt13SEER Single---Packaged HYBRIDHEAT ®
DualFuelSystemwithPuronr(R---410A) Refrigerant
Single And Three Phase
2---5 Nominal Tons (Sizes 24---60)
Installation Instructions
NOTE: Read the entire instruction manual before starting the
installation.
NOTE: Installer: Make sure the Owner’s Manual and Service
Instructions are left with the unit after installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS ....................... 1--2
INTRODUCTION ...................................
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words are used with the safety--alert symbol. DANGER identifies Manufacturer is not responsible for any damage incurred in transit. the most serious hazards which will result in severe personal injury Check all items against shipping list. Immediately notify the or death. WARNING signifies hazards which could result in per- nearest equipment distribution office if any item is missing. To sonal injury or death. CAUTION is used to identify unsafe practic- prevent loss or damage, leave all parts in
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A09450 Fig. 2 -- 48EZ--A24--36 Unit Dimensions 3 48EZ --A
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A09451 Fig. 3 -- 48EZ--A42--60 Unit Dimensions 4 48EZ --A
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G B HVAC unit HVAC unit C basepan base rails Sealing Gasket Roofcurb H F A Anchor screw Wood nailer* Flashing field Roofcurb* supplied Insulation (field supplied) Roofing material field supplied E D Cant strip field supplied SMALL CURB A09418 *Provided with roofcurb A09090 ROOF CURB DETAIL B C G H F A E D LARGE CURB A09415 A09419 CATALOG A B C D E F G H UNIT SIZE NUMBER IN. (mm) IN. (mm)* IN. (mm) IN. (mm) IN. (mm) IN. (mm) IN. (mm) IN. (mm) CPRFCURB010A00 11 (279) Small 10 (254) 32.4 (822) 30.
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CAUTION - NOTICE TO RIGGERS PRUDENCE - AVIS AUX MANIPULATEUR ACCESS PANELS MUST BE IN PLACE WHEN RIGGING. PANNEAUX D'ACCES DOIT ÊTRE EN PLACE POUR MANIPULATION. Use top skid as spreader bar. / Utiliser la palette du haut comme barre de répartition DUCTS MINIMUM HEIGHT: 36" (914.4 mm) HAUTEUR MINIMUM SEAL STRIP MUST BE IN BANDE SCELLANT DOIT ÊTRE PLACE BEFORE PLACING EN PLACE AVANT DE PLACER UNIT HEIGHT L'UNITÉ SUR LA BASE DE TOIT UNIT ON ROOF CURB HAUTEUR D'UNITÉ DETAIL A VOIR DÉTAIL A SEE DET
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TRAP Inspection OUTLET Prior to initial use, and at monthly intervals, all rigging shackles, clevis pins, and straps should be visually inspected for any 1-in. (25 mm) min. damage, evidence of wear, structural deformation, or cracks. Particular attention should be paid to excessive wear at hoist hooking points and load support areas. Materials showing any kind 2-in. (51 mm) min. of wear in these areas must not be used and should be discarded. ! WARNING A09052 UNIT FALLING HAZARD Fig. 6 -- Conden
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A 1/8--in. (3.2 mm) NPT plugged tapping, accessible for test gauge connection, must be installed immediately upstream of the gas ! WARNING supply connection to the gas valve. When installing the gas supply line, observe local codes pertaining FIRE OR EXPLOSION HAZARD to gas pipe installations. Refer to the NFGC NFPA 54/ANSI Failure to follow this warning could result in personal injury, Z223.1 latest edition (in Canada, CAN/CGA B149.1). death and/or property damage. NOTE: In the state of Massach
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Table 1 – Physical Data -- Unit 48EZ--A UNITSIZE48EZ ---A 24040 24060 30040 30060 36060 36090 42060 42090 NOMINAL CAPACITY ---ton 2 2 2---1/2 2---1/2 3 3 3---1/2 3---1/2 SHIPPING WEIGHT ---lb. 359 359 373 373 379 379 461 461 (kg) 163 163 169 169 172 172 209 209 COMPRESSORS Scroll Quantity 1 REFRIGERANT(R---410A) 8.3 8.3 10.2 10.2 7.9 7.9 10.0 10.0 Quantity ---lb 3.8 3.8 4.6 4.6 3.6 3.6 4.5 4.5 (kg) REFRIGERANTMETERING Indoor---TXV, Outdoor---Accurater DEVICE OUTDOORORIFICE 0.038 (Left) in. (qty)
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Table 1 -- Physical Data -- Unit 48EZ--A (Cont’d) UNITSIZE48EZ ---A 48090 48115 48130 60090 60115 60130 NOMINAL CAPACITY ---ton 4 4 4 5 5 5 OPERATING WEIGHT---lb 482 482 482 507 507 507 (kg) 219 219 219 230 230 230 COMPRESSORS Scroll Quantity 1 REFRIGERANT(R---410A) 9.6 12.3 Quantity ---lb 4.4 5.6 (kg) REFRIGERANTMETERING DEVICE TXV OUTDOOR ORIFICE---in.(qty) 0.046 (2) 0.052 (2) (mm) 1.2 1.3 OUTDOORCOIL 2...21 2...21 2...21 2...21 2...21 2...21 Rows...Fins---in. 13.6 13.6 13.6 17.5 17.5 17.5 Fac
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Step 9 — Install Duct Connections ! CAUTION The unit has duct flanges on the supply-- and return--air openings on the side and bottom of the unit. For downshot applications, the PROPERTY DAMAGE HAZARD ductwork connects to the roof curb (See Fig. 2 and 3 for connection sizes and locations). Failure to follow this caution may result in property damage. Configuring Units for Downflow (Vertical) Discharge Collect ALL screws that were removed. Do not leave screws on rooftop as permanent damage to the
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Return Duct Panels Horizontal Duct Covers A09061 Basepan Downflow (Vertical) Basepan Supply Downflow Knockout (Vertical) Supply Duct Panels Return Knockout A09060 Fig. 8 -- Supply and Return Duct Opening Return & Supply Duct Panels from Underside of Base (Alternate Method) A09420 Fig. 9 -- Vertical (Downflow) Discharge Duct Knockouts 12 48EZ --A
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Single phase units: Step 10 — Install Electrical Connections 1. Run the high--voltage (L1, L2) and ground lead into the control box. ! WARNING 2. Connect ground lead to chassis ground connection. ELECTRICAL SHOCK HAZARD 3. Locate the black and yellow wires connected to the line side of the contactor. Failure to follow this warning could result in personal injury or death. 4. Connect field L1 to black wire on connection 11 of the compressor contactor. The unit cabinet must have an uninterrupted,
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PRE--START--UP HIGH VOLTAGE POWER LEADS POWER (SEE UNIT WIRING ! SUPPLY WARNING LABEL) FIRE,EXPLOSION,ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury, EQUIP GR FIELD-SUPPLIED death or property damage. FUSED DISCONNECT 1. Follow recognized safety practices and wear protective CONTROL BOX goggles when checking or servicing refrigerant system. WHT(W1) W 2. Do not operate compressor or provide any electric power YEL(Y) Y to unit unless compressor terminal cover
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4. Verify the following conditions: de--energized. The evaporator motor is de--ener- gized after a 90 sec. delay. a. Make sure gas line is free of air. Before lighting the unit for the first time, perform the following with the gas d. GAS HEATING MODE valve in the “OFF” position: Outdoor temperature below balance point setpoint of thermostat. NOTE: If the gas supply pipe was not purged before connecting the unit, it will be full of air. It is recommended that the ground Heating Sequence of Opera
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Table 4 – Altitude Derate Multiplier for U.S.A.* BURNER FLAME DERATEMULTIPLIER ALTITUDEFT(M) PERCENT OF DERATE FACTOR{ 0---2000 BURNER 0 1.00 (0---610) 2001---3000* 8---12 0.90 (610---914) 3001---4000 12---16 0.86 (315---1219) 4001---5000 16---20 0.82 (1220---1524) MANIFOLD 5001---6000 20---24 0.78 (1524---1829) 6001---7000 24---28 0.74 (1829---2134) 7001---8000 28---32 0.70 (2134---2438) C99021 8001---9000 32---36 0.66 Fig. 12 -- Monoport Burner (2439---2743) 9001---10,000 36---40 0.62 (2744---
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4. Divide number of seconds in Step 3 into 3600 (number of the same for each burner. Propane will have blue flame (See Fig. seconds in one hr). 12). Refer to the Maintenance section for information on burner removal. 5. Multiply result of Step 4 by the number of cubic feet (cu ft) shown for one revolution of test dial to obtain cubic feet (cu Normal Operation ft) of gas flow per hour. An LED (light--emitting diode) indicator is provided on the 6. Multiply result of Step 5 by Btu heating value of
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Proceed as follows: Step 4 — Start--up Cooling and Make Adjust- 1. Remove caps from low-- and high--pressure service fittings. ments 2. Using hoses with valve core depressors, attach low-- and Complete the required procedures given in the Pre--Start--Up high--pressure gauge hoses to low-- and high--pressure section before starting the unit. Do not jumper any safety devices service fittings, respectively. when operating the unit. Do not operate the compressor when the 3. Start unit in Cooling Mod
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P3 SDL 5. Remove the vinyl cap off of the desired speed tap wire Gas Heating Fan Speed Set-up (Refer to Table 6 for color coding) for the dehumidification To change the gas heating speed: cooling fan speed and place desired speed tap wire on the 1. Remove the vinyl cap off of the desired speed tap wire “LOW” connection on the interface board (IFB). Verify (Refer to Table 6 for color coding). Table 10 shows the that static pressure is in the acceptable range for the speed temperature rise associa
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Table 7 – Filter Pressure Drop Table (IN. W.C.) CFM FILTER SIZE in. (mm) 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300 20X20X1 0.05 0.07 0.08 0.10 0.12 0.13 0.14 0.15 — — — — — — — — — — — (508X508X25) 20X24X1 — — — — 0.09 0.10 0.11 0.13 0.14 0.15 0.16 — — — — — — — — (508X610x25 ) 24X30X1 — — — 0.04 0.05 0.06 0.07 0.07 0.08 0.09 0.10 — — — — — — — — (610X762x25) 24X36X1 — — — — — — — 0.06 0.07 0.07 0.08 0.09 0.09 0.10 0.11 0.12 0.13 0.14 0.14 (610X914
