Carrier 50PG08 User manual

1
50PG08---16
Single Package Rooftop units
Electric Cooling with PURONR(R---410A) Refrigerant
and Electromechanical Controls
Installation Instructions
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 1........................
INSTALLATION 2...................................
Step 1 -- Plan for Unit Location 2.....................
Step 2 -- Provide Unit Support 2......................
Step 3 -- Rig and Place Unit 2........................
Step 4 -- Field Fabricate Ductwork 11..................
Step 5 -- Make Unit Duct Connections 11...............
Step 6 -- Install External Trap for Condensate Drain 11.....
Step 7 -- Make Electrical Connections 12................
Step 8 -- Optional EconoMi$er IV 29..................
Step 9 -- Install All Accessories 36.....................
PRE--START--UP 37..................................
START--UP 37.......................................
SERVICE 47........................................
TROUBLESHOOTING 55.............................
UNIT START--UP CHECKLIST 58......................
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components.
Only trained and qualified service personnel should install, repair,
or service air-conditioning equipment.
Untrained personnel can perform the basic maintenance functions
of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe
precautions in the literature, tags and labels attached to the unit,
and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves.
Recognize safety information. This is the safety--alert symbol
. When you see this symbol on the unit and in instructions or
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 a hazard
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.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, turn off main power switch to unit and install
lockout tag. Ensure electrical service to rooftop unit
agrees with voltage and amperage listed on the unit
rating plate.
!WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
Puron (R--410a) refrigerant systems operate at higher
pressures than standard R--22 systems. Do not use R--22
service equipment or components on Puron refrigerant
equipment.
!WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in personal
injury, death and/or property damage.
1. Improper installation, adjustment, alteration, service,
or maintenance can cause property damage, personal
injury, or loss of life. Refer to the User’s Information
Manual provided with this unit for more details.
2. Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
!WARNING

2
IMPORTANT: Units have high ambient operating limits. If
limits are exceeded, the units will automatically lock the
compressor out of operation. Manual reset will be required to
restart the compressor.
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components.
Only trained and qualified service personnel should install, repair,
or service air-conditioning equipment.
INSTALLATION
Step 1 —Plan for Unit Location
Select a location the unit and its support system (curb or other)
that provides minimum clearances required for safety, unit
performance and service access below, around and above unit as
specified in unit drawings. Consider also the effect of adjacent
units.
Do not install unit in an indoor location. Do not locate air inlets
near exhaust vents or other sources of contaminated air. Although
unit is weatherproof, guard against water from higher level runoff
and overhangs.
Select a unit mounting system that provides adequate height to
allow installation of condensate trap per requirements. Refer to
Step 6 — Install External Trap for Condensate Drain for
required trap dimensions.
Roof Mount
Check building codes for weight distribution requirements. Unit
operating weight is shown in Tables 1 and 2.
Step 2 —Provide Unit Support
Roof Curb
Assemble or install accessory roof curb in accordance with
instructions shipped with this accessory. See Fig. 1A and 1B.
Install insulation, cant strips, roofing, and counter flashing as
shown. Ductwork can be installed to roof curb before unit is set
in place. Ductwork must be attached to curb and not to the unit.
Curb must be level. This is necessary to permit unit drain to
function properly. Unit leveling tolerance is 1/16 in. per linear ft
in any direction. Refer to Accessory Roof Curb Installation
Instructions for additional information as required. When
accessory roof curb is used, unit may be installed on class A, B,
or C roof covering material. Carrier roof curb accessories are for
flat roofs or slab mounting.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a watertight seal. Install gasket with the roof curb as
shown in Fig. 1, 2 and 5. Improperly applied gasket can also
result in air leaks and poor unit performance. Do not slide unit to
position on roof curb.
Alternate Unit Support
When a curb cannot be used, install unit on a noncombustible
surface. Support unit with sleepers, using unit curb support area.
If sleepers cannot be used, support long sides of unit with a
minimum of 3 equally spaced 4-in. x 4-in. pads on each side.
Step 3 —Rig and Place Unit
Inspect unit for transportation damage. See Tables 1 and 2 for
physical data. File any claim with transportation agency.
PROPERTY DAMAGE HAZARD
Failure to follow this warning could result in personal
injury, death and property damage.
All panels must be in place when rigging and lifting.
!WARNING
Do not drop unit; keep upright. Use wooden top skid or spreader
bars over unit to prevent sling or cable damage. Rollers may be
used to move unit across a roof. Level by using unit rail as a
reference; leveling tolerance is 1/16 in. per linear ft in any
direction. Unit rigging weight is shown in Fig. 5.
Rigging holes are provided in the unit base rails as shown in Fig.
5. Refer to rigging instructions on unit. See Fig. 3 and 4 for panel
and filter locations.
After unit is in position, remove top crating and poly-
ethylene sheet.
50PG08---16

3
C06312
Fig. 1 --- Roof Curb Details (50PG08--14)
50PG08 ---16

4
C06306
Fig. 2 --- Roof Curb Details (50PG16)
50PG08 ---16

5
C06313
Fig. 3 --- Base Unit Dimensions (50PG08--14)
50PG08 ---16

6
C06314
Fig. 4 --- Base Unit Dimensions (50PG16)
50PG08 ---16

7
Hook rigging shackles through holes in base rail, as shown in
Detail A. Holes in base rails are centered around the unit
center of gravity. Use wooden top skid, when rigging, to
prevent rigging straps from damaging unit.
CAU OTI
ACCESS PANEL MUST BE IN PLACE WHEN RIGGING.
N- NOTICE TO R GGERS:I
UNIT
SIZE
A B C D E MAX. WEIGHT
in. mm in. mm in. mm in. mm in. mm lb kg
08---14 90.4 2296 36--- 54 914--- 1371 52.4 1331 48.0 1219 26.5 668 1572 713
16 100.4 2550 36---54 914--- 1371 52.4 1331 51.0 1245 35.0 889 1895 861
C06253
Fig. 5 --- 50PG Rigging Label
50PG08---16

8
Table 1—Physical Data (50PG08-14)
BASE UNIT 50PG 08 09 12 14
NOMINAL CAPACITY (Tons) 7.5 8.5 10 12.5
OPERATING WEIGHT (lb)
Unit* 1098 1105 1199 1310
Economizer
Vertical 57 57 57 57
Horizontal 59 59 59 59
Roof Curb
14-in. 180 180 180 180
24-in. 268 268 268 268
COMPRESSOR Fully Hermetic Scroll
Quantity 2 2 2 2
Oil Type Sys A Copeland 3MA Copeland 3MA Copeland 3MA Copeland 3MA
Sys B Copeland 3MA Copeland 3MA Copeland 3MA Copeland 3MA
Number of Refrigerant Circuits 2 2 2 2
Oil (oz) Sys A 42 42 66 56
Sys B 42 42 66 56
REFRIGERANT TYPE R-410A (PuronRefrigerant)
Expansion Device TXV TXV TXV TXV
Operating Charge (lb) Sys A 11.8 11.3 13.7 17.2
Sys B 11.8 11.3 13.7 17.2
Operating Charge Total All Systems (lb) 23.5 22.6 27.4 34.4
CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins, Face Split
Condenser A (Outer)
Rows...Fins/in. 217 217 217 317
Face Area (sq ft) 17.4 17.4 17.4 17.4
Condenser B (Inner)
Rows...Fins/in. 2...17 2...17 2...17 3...17
Face Area (sq ft) 17.4 17.4 17.4 17.4
CONDENSER FAN Propeller
QuantityDiameter (in.) 2...24 2...24 2...24 2...24
Nominal Cfm (Total, all fans) 7204 7204 8341 7300
Motor Hp 1/41/41/31/3
Nominal Rpm — High Speed 1100 1100 1100 1100
Nominal Rpm — Low Speed 900 900 900 900
EVAPORATOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Face Split
RowsFins/in. 315 315 415 415
Face Area (sq ft) 14.9 14.9 14.9 14.9
EVAPORATOR FAN Centrifugal Type, Belt Drive
QuantitySize (in.) Low 1...15 x 15 1...15 x 15 1...15 x 15 1...15 x 15
High 1...15 x 15 1...15 x 15 1...15 x 15 1...15 x 15
Type Drive Low Belt Belt Belt Belt
High Belt Belt Belt Belt
Nominal Cfm 3000 3400 4000 5000
Maximum Continuous Bhp Low 2.40 2.40 3.10 3.70
High 3.10 3.70 3.70 5.25
Motor Nominal Rpm 1725 1725 1725 1725
Motor Frame Size Low 56Y 56Y 56Y 56Y
High 56Y 56Y 56Y 56Y
Fan Rpm Range Low 568-771 568-771 690-893 690-893
High 812-1015 812-1015 852-1055 852-1055
Motor Bearing Type Ball Ball Ball Ball
Maximum Fan Rpm 1600 1600 1600 1600
Motor Pulley Pitch Diameter Range (in.) Low 2.8-3.8 2.8-3.8 3.4-4.4 3.4-4.4
High 4.0-5.0 4.0-5.0 4.6-5.6 4.6-5.6
Fan Pulley Pitch Diameter Low 8.5 8.5 8.5 8.5
High 8.5 8.5 8.5 8.5
Nominal Motor Shaft Diameter (in.) Low 5/85/87/87/8
High 7/87/87/87/8
BeltPitch Length (in.) Low 63.3 63.3 63.3 63.3
High 65.3 65.3 65.3 65.3
BeltType Low AX AX AX AX
High AX AX AX AX
Pulley Center Line Distance Min. (in.) Low 21.0 21.0 21.0 21.0
High 21.0 21.0 21.0 21.0
Pulley Center Line Distance Max. (in.) Low 23.4 23.4 23.4 23.4
High 23.4 23.4 23.4 23.4
Speed Change per Full Turn of
Movable Pulley Flange (rpm)
Low 41 41 41 41
High 41 41 41 41
Movable Pulley Maximum Full
Turns from Closed Position
Low 5 5 5 5
High 5 5 5 5
Factory Pulley Setting (rpm) Low 568 568 690 690
High 812 812 852 852
Fan Shaft Diameter at Pulley (in.) 1 1 1 1
HIGH-PRESSURE SWITCH (psig)
Cutout 660 10 660 10 660 10 660 10
Reset (Auto.) 505 20 505 20 505 20 505 20
LOW-PRESSURE SWITCH (psig)
Cutout 40 740 740 740 7
Reset (Auto.) 80 780 780 780 7
FREEZE PROTECTION THERMOSTAT (F)
Cutout 30 530 530 530 5
Reset (Auto.) 45 545 545 545 5
RETURN-AIR FILTERS Throwaway Type
QuantitySize (in.) 4...20 x 25 x 2 4...20 x 25 x 2 4...20 x 25 x 2 4...20 x 25 x 2
LEGEND
TXV — Thermostatic Expansion
*Aluminum evaporator/aluminum condenser coil fin material
50PG08---16

9
Table 2—Physical Data (50PG16)
BASE UNIT 50PG 16
NOMINAL CAPACITY (Tons) 15.0
OPERATING WEIGHT (lb)
Unit* 1771
Economizer 149
Humidi--MiZertSystem 64
Roof Curb
14--in. 240
24--in. 360
COMPRESSOR
Quantity
Oil Type Sys A
Sys B
Sys C
Number of Refrigerant Circuits
Oil (oz) Sys A
Sys B
Sys C
Fully Hermetic Scroll
3
Copeland 3MA
Copeland 3MA
Copeland 3MA
3
66
66
66
REFRIGERANT TYPE
Expansion Device
Operating Charge (lb) Sys A
Sys B
Sys C
Operating Charge Total All Systems (lb)
Unit with Humidi--MiZer System
Operating Charge (lb) Sys A
Sys B
Sys C
Total All Systems (lb)
R--410A (PuronRefrigerant)
TXV
13.5
15.0
15.0
43.5
18.8
16.7
18.8
54.3
CONDENSER COIL
Condenser A (Outer)
Rows...Fins/in.
Face Area (sq ft)
Condenser B (Inner)
Rows...Fins/in.
Face Area (sq ft)
Enhanced Copper Tubes, Aluminum Lanced Fins, Face Split
217
26.6
2...17
30.2
Humidi- MiZer Coil
Rows...Fins/in.
Face Area (sq ft)
Enhanced Copper Tubes, Aluminum Lanced Fins
1...17
22.2
CONDENSER FAN
QuantityDiameter (in.)
Nominal Cfm (Total, all fans)
Motor Hp
Nominal Rpm
Propeller
3...24
12,500
1/3
1100
EVAPORATOR COIL
RowsFins/in.
Face Area (sq ft)
Enhanced Copper Tubes, Aluminum Double--Wavy Fins, Face Split 315
22.2
EVAPORATOR FAN Centrifugal Type, Belt Drive
QuantitySize (in.) Low 1...15 x 15, 1...12 x 12
Mid--Low 1...15 x 15, 1...12 x 12
High 1...15 x 15, 1...12 x 12
Type Drive Low Belt
Mid--Low Belt
High Belt
Nominal Cfm 6000
Maximum Continuous Bhp Low 3.7
Mid--Low 5.25
High 7.5
Motor Frame Size Low 56
Mid--Low 56
HIgh S213T
Fan Rpm Range Low 710--879
Mid--Low 872--1066
High 1066--1260
Motor Bearing Type Ball
Motor Pulley Pitch Diameter Min (in.) Low 4.2
Mid--Low 4.2
High 5.2
Motor Pulley PItch Diameter Max (in.) Low 5.2
Mid--Low 5.2
High 6.2
Fan Pulley Pitch Diameter Low 10.2
Mid--Low 8.5
High 8.5
Nominal Motor Shaft Diameter (in.) Low 7/8
Mid--Low 7/8
High 13/8
BeltPitch Length (in.) Low 49.3
Mid--Low 47.8
High 43.8
50PG08---16

10
Table 2 — Physical Data (50PG16) (Cont)
EVAPORATOR FAN (Continued)
BeltType Low AX
Mid--Low BX
High BX
Pulley Center Line Distance Min. (in.) Low 14.2
Mid--Low 10.8
High 8.6
Pulley Center Line Distance Max. (in.) Low 10.8
Mid--Low 14.2
High 12
Speed Change (rpm) Low 34
Mid--Low 41
High 41
Movable Turns Low 5
Mid--Low 5
High 5
Factory Pulley Setting (rpm) Low 812
Mid--Low 983
High 1191
Fan Shaft Diameter at Pulley (in.) 13/16
HIGH- PRESSURE SWITCH (psig)
Cutout 660 10
Reset (Auto.) 505 20
RETURN- AIR FILTERS
QuantitySize (in.) Throwaway Type 8...20 x 20 x 2
LEGEND
TXV — Thermostatic Expansion
*Aluminum evaporator/aluminum condenser coil fin material
50PG08---16