Installation, Start-Up and Service Instructions

62AQ Energy$Recycler
For Use With
Small Rooftop Units
3 to 121/2 Tons
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . .1,2
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Step 1 — Complete Pre-Installation Checks . . . . . . 2
• INSPECT SHIPMENT
Step 2 — Install Mounting Rail Kit . . . . . . . . . . . . . . . . 2
Step 3 — Rig Accessory Energy$Recycler
Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Step 4 — Attach the Energy$Recycler
to the Rooftop Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
• PREPARE THE RETURN AIR SECTION OF THE
RTU TO ACCEPT THE ENERGY$RECYCLER UNIT
Step 5 — Assemble and Mount Supply-Air
Hood and Outside Cooling and Heating
Thermostats for the Energy$Recycler and
Set Optional Supply-Air Fan Speed . . . . . . . . . . . . 9
Step 6 — Mount the Barometric Damper and
Exhaust Hood Assembly and Adjust
Exhaust Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 7 — Set the Outdoor Cooling and
Heating Thermostats. . . . . . . . . . . . . . . . . . . . . . . . . . 30
• COOLING
• HEATING
Step 8 — Install Condensate Lines and
Fittings on Rooftop Unit . . . . . . . . . . . . . . . . . . . . . . 30
Step 9 — Make Electrical Connections . . . . . . . . . . 30
• FIELD POWER SUPPLY
• INSTALLING ACCESSORY 62AQ ON A COMMON
POWER SUPPLY WITH ALL RTUs (EXCEPT RTU
SIZE 014 230-V UNITS, AND 230-V 62AQ ON A
460-V POWER SUPPLY)
• INSTALLING ACCESSORY 62AQ ON A COMMON
POWER SUPPLY WITH ALL SIZE 014 230-V RTUs
• INSTALLING ACCESSORY 62AQ SIZES 060 AND
100 (230 V) ON A COMMON POWER SUPPLY WITH
ALL 460-V RTUs
Light Commercial Thermidistat
Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
• GENERAL
• POWER
• DEHUMIDIFCATION EQUIPMENT AND
CONNECTIONS
LIGHT COMMERCIAL THERMIDISTAT
ACCESSORY INSTALLATION. . . . . . . . . . . . . . . 33-37
Step 1 — Select Light Commercial
Thermidistat Location. . . . . . . . . . . . . . . . . . . . . . . . . 33
Step 2 — Set DIP Switches . . . . . . . . . . . . . . . . . . . . . . 33
Step 3 — Install Light Commercial
Thermidistat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Page
Step 4 — Set Light Commercial
Thermidistat Configuration . . . . . . . . . . . . . . . . . . . 34
Step 5 — Conduct Light Commercial
Thermidistat Start-Up and Checkout . . . . . . . . . . 36
Step 6 — Make Final Settings . . . . . . . . . . . . . . . . . . . 36
OPERATIONAL INFORMATION . . . . . . . . . . . . . . . . . . 37
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37,38
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38-40
ENERGY$RECYCLER TROUBLESHOOTING. . .41,42
ROOFTOP BASE RAIL TEMPLATE . . . . . . . . . . . . . . 45
ENERGY$RECYCLER START-UP
CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . . .CL-1, CL-2
SAFETY CONSIDERATIONS
Installing, starting up, and servicing air-conditioning equipment can be hazardous due to system pressures, electrical components, and equipment location (roofs, elevated structures,
etc.)
Only trained, qualified installers and service technicians
should install, start-up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should be performed by trained and qualified service personnel.
Before performing service or maintenance operations on
unit, turn off all power switches to unit. Multiple switches
may exist. Electrical shock could cause personal injury.
When working on equipment, observe precautions on
the literature and on tags, stickers, and labels attached to the
equipment.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling, rigging, and setting bulky
equipment.
Read these instructions entirely before installing
Energy$Recycler. See Fig. 1.
Never mount the Energy$Recycler on an uninstalled unit
or a unit that has not been mounted onto a roof or curb.
Turn off all power to rooftop unit prior to installing the
Energy$Recycler accessory.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC 111
Catalog No. 536-215
Printed in U.S.A.
Form 62AQ-3SI
Pg 1
5-00
Replaces: 62AQ-1SI
Book 1 1 1 1
4 4 4 4
Tab 1a 1b 5a 10a 5a 6a 6b 12a
Table 2 — Hood Kit Package Contents
(Shipped with Energy$Recycler Unit)
ITEM
Hood Top*
Hood Side†
End Cap
Aluminum Filter Screen
Barometric Relief Damper
Exhaust Hood Wire Guard
Hinge
Hinge Pin
Exhaust Damper Limiter
Gasket
Sheet Metal Screw
Knob (for thermostats)
Small Machine Screw (for thermostats)
QTY
2
4
1
1
1
1
1
1
1
1
36
2
4
*One each for Supply Air Hood and Exhaust Hood.
†Two each for Supply Air Hood and Exhaust Hood.
Fig. 1 — 62AQ Energy$Recycler
Step 2 — Install Mounting Rail Kit
INTRODUCTION
IMPORTANT: The mounting rail kit must be installed
on the RTU before the Energy$Recycler unit is rigged.
See Fig. 2. Package contents for the Mounting Rail Kit
accessory are listed in Table 1.
The accessory 62AQ Energy$Recycler unit is designed
specifically for application with curb mounted, vertical
discharge 3 to 12.5 ton Carrier packaged rooftop units
(RTU) models 48/50D,H,L,T004-014 manufactured since
August 1992 (serial number 3492G). A new filter rack will be
required on units with serial numbers between 3892G and
3494G. The Energy$Recycler unit is installed using one of two
accessory Mounting Rail Kits. (See Table 1.)
• Part number CRMTGKIT001A00 for installation of
either a 62AQ060 or 62AQ100 Energy$Recycler unit on
a 3 to 12.5 ton RTU.
• Part number CRMTGKIT002A00 for installation of
either a 62AQ200 or 62AQ300 Energy$Recycler unit on
a 7.5 to 12.5 ton RTU.
A hood kit is shipped with the Energy$Recycler unit. The
hood kit (see Table 2) is required in order to complete this installation. The hood kit includes the necessary components for
both supply-air hood and exhaust hood installation.
Retrofit installations on older Carrier rooftop units and
competitive units are possible, but field modifications to
mounting arrangement, attachment to the rooftop unit, and wiring will be required. For more information contact your local
Carrier representative.
1. Two small sections on each side of the sheet metal
skirt (on the supply side and return side of the RTU)
must be removed to install the extender rails. Use the
paper template in the back of this installation manual
to mark the location (both sides) where the cuts will be
made. See Fig. 3.
NOTE: RTU units manufactured after serial number 1499G
have starter notches in the skirt to identify location for saw
cuts.
2. Using a reciprocating saw or similar tool, saw completely through the skirt from top to bottom on each
side of the unit. See Fig. 3. Use care to avoid damaging
unit end panels.
3. Remove the three screws from the RTU that are holding the corner piece of the skirt in place. Save screws
for later use. Remove and discard corner piece sections
exposing open ends of rooftop unit skirt.
INSTALLATION
Step 1 — Complete Pre-Installation Checks
INSPECT SHIPMENT — File claim with shipment company
if shipment is damaged or incomplete. Unpack and check
accessory package contents using Tables 1 and 2.
Table 1 — Accessory Mounting Rail
Kit Package Contents
ITEM
Crossrail
Extender Rail
Return Air Baffle
Return Air Side Baffle
Wire Guard
No. 10 Screw
1/ -in. Self-Drilling Screw
4
PVC Elbow and Nipple
Gasket
Hose
QTY
CRMTGKIT001A00 CRMTGKIT002A00
2
1
2
2
1
1
2
2
1
1
12
12
18
22
1 of each
1 of each
9 ft
14 ft
N/A
42 in.
Fig. 2 — Energy$Recycler Attached to RTU
2
NOTE: Keep remaining skirt in place after removing corner
piece sections.
4. Slide the extender rails into the ends of the RTU base
rails (both sides). Ensure the 2 screw holes on the
extender rails line up with the existing holes in the
base rails. Use the screws saved from Step 3 to secure
the extender rails in place.
5. Assemble the telescoping cross rails if installing
part no. CRMTGKIT001A00. Slide the two telescoping cross rails into the extender rails (see Fig. 4) and
secure with two no. 10 screws (provided in kit) on
each end rail to the matching extender rail screw holes.
The telescoping rails have several different holes so
that they can be compatible with the different RTU
sizes.
NOTE: Part no. CRMTGKIT00200 has one non-telescoping
cross rail. See Fig. 5.
2.25”
Fig. 3 — Removing Skirt Sections
GASKET MATERIAL
HORIZONTAL SUPPLY OUTLET
RETURN AIR OPENING
(PANEL) REMOVED
LEFT HAND
EXTENDER RAIL
UNIT
CORNER
TELESCOPE
CROSS RAIL
MATCHING SKID RAIL
SCREW HOLES
RIGHT HAND EXTENDER RAIL
TELESCOPE
CROSS RAIL
EXTENDER RAIL CROSS RAIL
SCREWS HOLES
Fig. 4 — Rail Mounting Kit, P/N CRMTGKIT001A00
(3 to 121/2 Ton Rooftop Units)
3
LEFT HAND
EXTENDER RAIL
CROSS RAIL
RIGHT HAND
EXTENDER RAIL
Fig. 5 — Rail Mounting Kit, P/N CRMTGKIT002A00
(71/2 to 121/2 Ton Rooftop Units)
Step 3 — Rig Accessory Energy$Recycler
Unit — Keep Energy$Recycler unit upright and do not drop.
TOP CRATE
Spreader bars are not required if top crating (Fig. 6) is left on
unit. See Table 3 and Fig. 7 and 8 for unit weight, physical data,
and dimensions.
HOOD KIT
Energy$Recycler unit is heavy. Take proper safety precautions to avoid personal injury or unit damage when moving
the unit.
FILTER
ACCESS
PANEL
BOTTOM
WOODEN
SKID
SUPPLY
BLOWER
ACCESS
PANEL
Be sure all unit panels are securely in place prior to rigging.
BRACKET
BANDING
MATERIAL
Fig. 6 — Packaging Assembly
4
5
Fig. 7 — Base Unit Dimensions, 62AQ060 and 62AQ100
CG
Direction of Airflow
Center of Gravity
REQUIRED CLEARANCES TO COMBUSTIBLE MATL.
MILLIMETERS [IN.]
All Sides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 [0]
NEC REQUIRED CLEARANCES
Between Unit (Control Box/Exhaust Side) and
Ungrounded Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914.0 [36.00]
And Block or Concrete Walls and Other
Grounded Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1066.8 [42.00]
REQUIRED CLEARANCE FOR OPERATION AND SERVICING
Filter Access Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 762.0 [30.00]
Supply-Air Intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914.0 [36.00]
Unit Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 [0]
Exhaust Air Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914.0 [36.00]
Duct Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 [0]
Must be attached to ductwork or mated to Carrier unit sizes (004-014)
using accessory kit CRMTGKIT001A00.
Dimensions in [ ] are in inches.
CENTER OF GRAVITY
UNIT WT. UNIT HEIGHT
ELECTRICAL
mm [in.]
mm [in.]
CHARACTERISTICS
Lb Kg
“A”
X
Y
62AQ060
208/230-1-60
225 102 809.4 [31.87] 419.0 [16.50] 279.4 [11.00]
62AQ100
208/230-1-60
240 109 809.4 [31.87] 419.0 [16.50] 279.4 [11.00]
UNIT
6
Fig. 8 — Base Unit Dimensions, 62AQ200 and 62AQ300
UNIT WT.
CG
Direction of Airflow
Center of Gravity
REQUIRED CLEARANCES TO COMBUSTIBLE MATL.
MILLIMETERS [IN.]
All Sides . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 [0]
NEC REQUIRED CLEARANCES
Between Unit (Control Box/Exhaust Side)
And Ungrounded Surfaces. . . . . . . . . . . . . . . . . . . . . . . . . 914.0 [36.00]
And Block or Concrete Walls and Other
Grounded Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1066.8 [42.00]
REQUIRED CLEARANCE FOR OPERATION AND SERVICING
Filter Access Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 762.0 [30.00]
Supply-Air Intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914.0 [36.00]
Unit Top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 [0]
Exhaust Air Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 914.0 [36.00]
Duct Side . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 [0]
Must be attached to ductwork or mated to Carrier unit sizes (008-014)
using accessory kit CRMTGKIT002A00.
Dimensions in [ ] are in inches.
ELECTRICAL
CHARACTERISTICS
UNIT HEIGHT
CENTER OF GRAVITY
mm [in.]
mm [in.]
Lb Kg
“A”
X
Y
62AQ200 208/230-1-60, 208/230-3-60, 460-3-60 451 205 1012.4 [39.86] 759.71 [29.91] 381.00 [15.00]
62AQ300
208/230-3-60, 460-3-60
493 224 1012.4 [39.86] 772.41 [30.41] 368.30 [14.50]
UNIT
Table 3 — Physical Data
UNIT
OPERATING WEIGHT (lb)
Accessory Mounting Kit (lb)
SHIPPING WEIGHT (lb)
COMPRESSOR
Quantity
Oil (cc)
Suction Line Diameter (in.)
Discharge Line Diameter (in.)
Liquid Line Diameter (in.)
REGRIGERANT TYPE
Operating Charge (lbs)
EVAPORATOR COIL (SUPPLY COIL)
Number of Circuits
Rows...Fins/in.
Total Face Area (sq ft)
EXHAUST FAN
Size (Diameter x Width)
Nominal Cfm
Bhp
Motor Frame
Nominal Fan Rpm
Motor Bearing Type
Maximum Fan Rpm
Nominal Motor Shaft Diameter (in.)
Type
Motor Pulley
Fan Pulley
Belt
OPTIONAL SUPPLY FAN
Size (Diameter x Width)
Nominal Cfm
Hp
Motor Frame
Nominal Fan Rpm
Motor Bearing Type
Maximum Fan Rpm
Nominal Motor Shaft Diameter (in.)
Type
CONDENSER COIL (EXHAUST COIL)
Number of Circuits
Rows...Fins/in.
Total Face Area (sq ft)
HIGH PRESSURE SWITCH (psig)
Cutout
Reset (Auto.)
OUTDOOR-AIR INLET SCREEN
Quantity...Size (in.)
SUPPLY AND EXHAUST AIR FILTERS
Quantity...Size (in.)
62AQ
100
240
30
260
060
225
30
245
200
451
59
487
300
493
59
529
Rotary
Reciprocating
1
1
1
550
1922
1922
1/
3/
3/
2
4
4
3/ 8
1/2
1/ 2
3/ 8
3/8
3/ 8
R-22
2
3
6
8
High-Efficiency Enhanced Copper Tubes, Lanced Aluminum Fins
TXV + Acutrol™ Feed Device
2
3
4
8
2...15
2...15
2...15
2...15
1.4
2
3.7
5.6
Centrifugal Type
7.12 x 6
7.12 x 6
10 x 10
10 x 10
600
1000
2000
3000
1/
1
1
1/ 2
/2
/2
6
48
48
48
56
1125
1735
1075
1750
Ball
Ball
Ball
Ball
1950
1950
1950
1950
1/
1/
1/
5/
2
2
2
8
Direct Drive Fan
Direct Drive Fan
Direct Drive Fan
Belt
—
—
2.8
3.8
—
—
4.5
4.5
—
—
—
A37
1
550
1/
2
3/
8
3/8
7.12 x 6
7.12 x 6
10 x 10
11 x 10
600
1000
2000
3000
1/
1
1
/2
/2
1
6
48
48
48
48
1125
1735
1075
1040
Ball
Ball
Ball
Ball
1950
1950
1200
1280
1/2
1/ 2
1/2
1/ 2
Direct Drive Fan
Direct Drive Fan
Direct Drive Fan Direct Drive Fan
High-Efficiency Enhanced Copper Tubes, Lanced Aluminum Fins
TXV + Acutrol Feed Device
2
3
4
8
2...15
3...15
2...15
3...15
2
2
5.6
5.6
428
320
Cleanable
1...20x24x1
1...20x42x1
Throwaway
1...12x24x1
2...16x25x2
TXV — Thermostatic Expansion Valve
Step 4 — Attach the Energy$Recycler to the
Rooftop Unit (RTU)
PREPARE THE RETURN AIR SECTION OF RTU TO
ACCEPT THE ENERGY$RECYCLER UNIT (Fig. 10 and
11)
1. For RTU unit sizes 004-007, remove the return air duct
cover. For RTU sizes 008-014, refer to Fig. 10 and 11
for dimensions of piece to remove from the lower portion of the return air duct cover of the RTU. Drill 2
pilot holes along the bottom edge of remaining piece
of the return air duct cover of the RTU, as shown in
Fig. 10 and 11. Save the top piece for reinstallation on
the RTU.
2. Place gasket material (provided in rail mounting kit)
around the perimeter of the return opening of the RTU.
See Fig. 4, 5, 10 and 11.
IMPORTANT: Before attaching the Energy$Recycler to
the rooftop unit, remove the rooftop unit’s condensate
trap (if previously installed) by turning it counterclockwise and unscrewing it. Save condensate trap for later
use. When the rooftop unit and the Energy$Recycler are
connected, the rooftop equipment’s condensate drain
line will drain into the Energy$Recycler’s condensate
pan.
1. Remove the screws on each end of the bottom wooden
skids attached to the end of the Energy$Recycler unit.
See Fig. 7-9.
2. Remove and discard the wooden skid by pulling it
away from the unit.
Do not overlap gasket material, as it will cause water leaks.
7
UPPER ENGAGEMENT
HOLES
CAUTION - NOTICE TO RIGGERS:
ALL PANELS MUST BE IN PLACE WHEN RIGGING.
Hook rigging shackles through holes in base rail, as shown.
Use wooden top skid, when rigging, to prevent rigging straps
from damaging unit.
A
"B"
914 - 137
(36" - 54")
B
25 1/2”
"C"
"A"
UNIT
62AQ060
62AQ100
62AQ200
62AQ300
MAX WEIGHT
LB
KG
111
245
118
260
221
487
240
529
B
A
C
IN.
34.50
MM
876
IN.
17.25
MM
438
IN.
33.38
MM
848
62
1515
31
788
41.38
1050
.50 x .50 GASKET MATERIAL
AROUND OPENING
60AQ500132
UNIT SIZE
Fig. 9 — Energy$Recycler Unit
Rigging Information
008, 009
012, 014
3. Remove the rooftop equipment’s filter rack assembly
by removing the screws that hold the rack in place.
Pull assembly out of cabinet and set aside.
DIM A (in.)
(Top Piece of Panel)
93/16
117/8
DIM B (in.)
(Panel)
3411/16
373/8
Fig. 10 — Preparing RTU Return-Air
Opening to Accept Energy$Recycler,
62AQ060 and 62AQ100 Units
4. Position the Energy$Recycler unit to the rooftop
equipment by setting the Energy$Recycler unit’s filter
access side base rails over the newly installed extended
rails on the filter access side of the rooftop unit. See
Fig. 12-14.
NOTE: The base rail on all Energy$Recycler units will project
2 in. over the extended mounting rail on the filter access side.
See Fig. 13 and 14. The base rail opposite the filter access side
on the 62AQ200 and 62AQ300 models will project 2 in. over
the extender mounting rail when installed on a large rooftop
unit. See Fig. 14.
5. Pull the wire harness from the Energy$Recycler unit
directly through the rooftop unit’s horizontal return air
duct opening, sliding both units together. Plug 12-pin
rooftop unit plug into plug from Energy$Recycler unit.
6. With the Energy$Recycler unit positioned, gently pull
the insulation back from the rooftop unit exposing the
existing engagement holes.
7. Fasten the units together with the 1/4-in. self-drilling
screws by drilling into the Energy$Recycler unit
through the engagement holes around the perimeter of
the RTU’s duct cover opening. On RTU unit sizes 008014, two of the holes along the bottom edge of the
remaining piece of the return air duct cover should
have been drilled in Step 1, when the return air duct
cover was modified. See Fig. 10 and 11.
8. Reinstall the filter rack frame in the rooftop unit.
Refasten the screws to hold the filter rack in place.
9. Reinstall the filters.
10. Assemble return air baffle assembly per Fig. 15 and
16. Attach return air baffle to side baffles with screws
provided. The wire guard has 2 wire legs that slide into
return air baffle predrilled holes, on top.
11. Mount return air baffle assembly into the return air
section of the rooftop equipment as shown in Fig. 15
and 16. Secure with screws provided.
NOTE: Return air baffle assembly prevents circulation of air
through the Energy$Recycler unit.
A
0.50 x 0.50 SEAL STRIP
AROUND OPENING
33 3/8”
B
UNIT SIZE
012, 014
DIM A (in.)
(Top Piece of Panel)
4
DIM B (in.)
(Panel)
373/8
Fig. 11 — Preparing RTU Return-Air
Opening to Accept Energy$Recycler,
62AQ200 and 62AQ300 Units
8
ROOFTOP UNIT
MOUNTING RAILS
(P/N CRMTGKIT002A00)
2”
PROJECTION
SUPPLY
OPENING
EXHAUST
INLET
7.5-12.5 TON
KNOCKOUT
ENERGY$RECYCLER
3-6 TON
KNOCKOUT
FILTER
ACCESS
SIDE
62AQ200/62AQ300 INSTALLED
ON 7.5-12.5 TON UNIT
Fig. 14 — Top View of 62AQ200 and 62AQ300
Energy$Recycler Installation
Fig. 12 — Knockout Location
ROOFTOP UNIT
MOUNTING RAILS
(P/N CRMTGKIT001A00)
ENERGY$RECYCLER
ROOFTOP UNIT
2”
PROJECTION
MOUNTING RAILS
(P/N CRMTGKIT001A00)
FILTER
ACCESS
SIDE
ENERGY$RECYCLER
2”
PROJECTION
FILTER
ACCESS
SIDE
62AQ060/62AQ100 INSTALLED
ON 7.5-12.5 TON UNIT
62AQ060/62AQ100 INSTALLED
ON 3-6 TON UNIT
Fig. 13 — Top View of 62AQ060 and 62AQ100 Energy$Recycler Installation
1. Assemble and mount supply air hood as shown in
Fig. 17.
2. Discard the tape that holds the thermostats behind the
damper plates. Mount thermostats to the hood sides of
the Energy$Recycler unit into the holes provided, with
thermostat terminals facing up. See Fig. 17. Mount
outside cooling set point thermostat part number
HH22HA060 (white label) on the left side of the hood.
See Fig. 17.
3. Mount the outside heating thermostat part number
HH22HA065 (red label) on the right side of the hood.
See Fig. 17.
Step 5 — Assemble and Mount Supply-Air
Hood and Outside Cooling and Heating Thermostats for the Energy$Recycler and Set
Optional Supply-Air Fan Speed — The hood kit
supplied with the Energy$Recycler unit is needed to complete
this installation. See Table 2 and Fig. 17. The Energy$Recycler
unit’s supply air hood installs around its motorized damper
inlet.
NOTE: Mount the hood sides to the Energy$Recycler
unit first, and then the hood top for easier installation.
The thermostats are shipped factory-wired and taped
behind the damper blade of the 62AQ Energy$Recycler
unit. Knobs and screws are in hood package.
9
PACKAGE UNIT FILTER RACK
GRILLE
RETURN AIR
SIDE BAFFLE
RETURN AIR
SIDE BAFFLE
RETURN AIR BAFFLE
VERTICAL RETURN AIR INLET
Fig. 15 — Return-Air Baffle (62AQ060, 62AQ100 Unit Shown)
GRILLE
RETURN AIR
SIDE BAFFLE
RETURN AIR
SIDE BAFFLE
RETURN AIR
BAFFLE
Fig. 16 — Return-Air Baffle (62AQ200, 62AQ300 Unit Shown)
10
To change fan speeds:
a. Shut off unit power supply.
b. Loosen belt by loosening fan motor mounting
nuts.
c. Loosen movable pulley flange setscrew.
d. Screw movable flange toward fixed flange to
increase speed and away from fixed flange to
decrease speed. Increasing fan speed increases
load on motor.
e. Set movable flange at nearest keyway of pulley
hub and tighten setscrew.
To align fan and motor pulleys:
a. Loosen fan pulley setscrews.
b. Slide fan pulley along fan shaft.
c. Make angular alignment by loosening motor from
mounting plate.
To adjust belt tension:
a. Loosen fan motor mounting nuts.
b. Slide motor mounting plate away from fan scroll
for proper belt tension (1/2-in. deflection with one
finger) and tighten mounting nuts.
c. Adjust bolt and nut on mounting plate to secure
motor in fixed position.
4. Loosen compressor bolts and remove shipping blocks
from under compressor on the 62AQ060 and 62AQ100
sizes only.
5. Install exhaust hood as shown in Fig. 36.
6. Install wire guard as shown in Fig. 36.
4. From the outside of the unit’s side panels fasten the
thermostat(s) with two mounting screws, with the
quick connect terminals face up. See Fig. 17.
5. Install thermostat knobs (provided in kit). See Fig. 17.
6. Set supply air quantity (on units with optional factoryinstalled supply air fan (GA) or field-installed accessory supply air fan kit [CRFANKIT001-006A00]).
Select the fan speed and damper position to obtain
desired cfm (see fan performance curve data, Fig. 1835). Relocate damper stops to the desired position on
the damper support rail and adjust the fan speed by
relocating the wire on the supply fan motor terminal
block. Factory set position is 45 degrees for the
damper position, and medium speed for the motor.
Relocate stops to top hole for 30 degrees, bottom hole
for 60 degrees, and remove stops for 90 degrees (see
Fig. 17).
7. Install the aluminum filter screen and end cap with
screws along the top, as shown in Fig. 17.
Step 6 — Mount the Barometric Relief Damper
and Exhaust Hood Assembly and Adjust
Exhaust Fan — The hood kit supplied with the Energy$Recycler unit is needed to complete this installation. The
exhaust air hood (that includes the barometric relief damper)
must be assembled and installed on the 62AQ unit per the instructions below. See Fig. 36.
1. Install the barometric relief damper onto the
Energy$Recycler by mounting the hinge with 2 screws
then sliding in the hinge pin. See Fig. 36.
2. Install damper limiter for 30, 45, or 60 degree angles.
Limiter pin not required for 90-degree setting (set to
the desired position based on CFM requirements and
fan speed). See Fig. 36. Fan speed is adjusted by relocating wires on fan terminal blocks. On the 62AQ300
size, adjust fan speed by changing the pulley setting.
3. Adjust exhaust fan speed (62AQ300 only). Adjust
condenser/exhaust fan speed to meet application conditions. Refer to Fig. 35.
Never operate the unit without the wire guard in place.
HOOD TOP
DAMPER BLADE STOP
SHIPPED WITH UNIT
IN 45° POSITION
KNOB
SCREWS (2)
HOOD
SIDE
LTLO
MOUNTING
BRACKET
HEATING POINT
THERMOSTAT
(RED LABEL)
END CAP
COOLING SET POINT
THERMOSTAT (WHITE LABEL)
HOOD SIDE
TEMPERATURE SWITCH
SHIPPED WITH UNIT
TEMPERATURE
COOLING
LOCKOUT (LTLO)
SCREW INSTALLATION (2)
KNOB
ALUMINUM FILTER SCREEN
Fig. 17 — Supply-Air Hood Assembly
11
12
Fig. 18 — 62AQ060 Supply Fan Performance Curve, 208 Volts
13
Fig. 19 — 62AQ060 Supply Fan Performance Curve, 230 Volts
14
Fig. 20 — 62AQ060 Exhaust Fan Performance Curve, 208 Volts
15
Fig. 21 — 62AQ060 Exhaust Fan Performance Curve, 230 Volts
16
Fig. 22 — 62AQ100 Supply Fan Performance Curve, 208 Volts
17
Fig. 23 — 62AQ100 Supply Fan Performance Curve, 230 Volts
18
Fig. 24 — 62AQ100 Exhaust Fan Performance Curve, 208 Volts
19
Fig. 25 — 62AQ100 Exhaust Fan Performance Curve, 230 Volts
20
Fig. 26 — 62AQ200 Supply Fan Performance Curve, 208 Volts
21
Fig. 27 — 62AQ200 Supply Fan Performance Curve, 230 Volts
22
Fig. 28 — 62AQ200 Supply Fan Performance Curve, 460 Volts
23
Fig. 29 — 62AQ200 Exhaust Fan Performance Curve, 208 Volts
24
Fig. 30 — 62AQ200 Exhaust Fan Performance Curve, 230 Volts
25
Fig. 31 — 62AQ200 Exhaust Fan Performance Curve, 460 Volts
26
Fig. 32 — 62AQ300 Supply Fan Performance Curve, 208 Volts
27
Fig. 33 — 62AQ300 Supply Fan Performance Curve, 230 Volts
28
Fig. 34 — 62AQ300 Supply Fan Performance Curve, 460 Volts
29
Fig. 35 — 62AQ300 Exhaust Fan Performance Curve, 208, 230, 460 Volts
HOOD TOP
HOOD SIDE
HINGE
HINGE PIN
BAROMETRIC
RELIEF DAMPER
60° LOCATION
45° LOCATION
HOOD SIDE
WIRE GUARD
30° LOCATION
DAMPER LIMITER
Fig. 36 — Barometric Exhaust Air Hood Assembly
rooftop unit will drain through this fitting directly into
the Energy$Recycler unit’s lower coil condensate pan.
62AQ200 AND 62AQ300 ENERGY$RECYCLER UNITS
1. Remove control access panel and the supply blower
access panel from the Energy$Recycler unit. See
Fig. 8).
2. Attach the threaded end of the 3/4-in. nipple (shipped
in the accessory Mounting Rail kit) into the RTU.
3. Slide one end of the 3/4-in. tubing through the hole in
the coil mounting bracket. Attach to the barbed end of
the nipple.
4. Connect the opposite end of the 3/4-in. tubing to one
end of the elbow, ensuring that the open end of the
elbow will drain properly into the condensate pan.
NOTE: The condensate from the rooftop unit along with the
condensate from the upper coil will drain out of the
Energy$Recycler unit. The 62AQ condensate outlet must have
a field-fabricated P-trap installed. Install the trap at least 4 in.
deep and protect against freeze-up. If drain line is installed
downstream from the external trap, pitch the line away from
the rooftop unit at 1 in. per 10 ft of run. Do not use a pipe
smaller than the unit connection.
Step 7 — Set the Outdoor Cooling and Heating Thermostats
IMPORTANT: The 62AQ unit is shipped with an outdoor thermostat set at 55 F which locks out mechanical
cooling on the RTU and the 62AQ compressor. If this
feature is not desirable, the rooftop unit’s compressor
can be allowed to run by relocating both gray wires to
the same side of the Low Temperature Lockout Thermostat (LTLO) leaving the white wire on the opposite pole,
locking out only the 62AQ compressor. The LTLO is
also accessible by removing the filter access panel and
the door of the damper mounting bracket. Refer to Troubleshooting section.
COOLING — During the unoccupied period, the economizer
mode of operation is used as the first stage of cooling. When
the outside air temperature is below the cooling thermostat set
point, the outside air will be used for first stage cooling.
HEATING — The heating thermostat should be adjusted
to the second stage balance point (heat output of the
Energy$Recycler plus the heat output of the first stage on rooftop unit equals building load at this temperature). Above this
setting, first stage heating will be the 62AQ unit and second
stage will be the first stage of the rooftop unit. Below this point
first stage heating will be the 62AQ unit plus first stage heating
of the rooftop unit. The second stage will be the second stage of
the rooftop unit.
Step 9 — Make Electrical Connections
Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if
an electrical fault should occur. This ground may consist of
electrical wire connected to unit ground wire in power
compartment, or conduit approved for electrical ground
when installed in accordance with NEC (National Electrical Code) ANSI/NFPA (American National Standards
Institute/National Fire Protection Association) latest revision, and local electrical codes. Failure to follow this warning could result in the installer being liable for personal
injury of others.
Step 8 — Install Condensate Lines and Fittings on Rooftop Unit
62AQ060 AND 62AQ100 ENERGY$RECYCLER UNITS
1. Remove control access panel from the Energy$Recycler unit (see Fig. 7).
2. Install the PVC nipple and elbow (from the accessory
Mounting Rail kit) in the female 3/4-in. condensate
drain outlet of the rooftop unit. Condensate from the
30
device (MOCP), add “X” amps, found on the 62AQ
unit nameplate and Table 4B, to the values of MCA
and MOCP for the RTU. If the calculated new MOCP
is nonstandard, select the next lowest size for the
combined MOCP rating. If the combined MOCP rating is now less than the MCA, select the next higher
size for the MOCP.
2. Provide a FUSED DISCONNECT for the 62AQ unit
sized per the 62AQ nameplate and Table 4B.
3. Provide a disconnect for the RTU:
• If installing on units without electric heat a FUSED
DISCONNECT sized per nameplate is required for
the RTU.
• If installing on units with electric heat, a non-fused
disconnect sized per nameplate marking may be
used for the RTU.
INSTALLING ACCESSORY 62AQ SIZES 060 AND 100
(230 V) ON A COMMON POWER SUPPLY WITH ALL
460-V RTUs
Perform the following steps:
1. For the combination load ratings for minimum circuit
amps (MCA) and maximum over current protective
device (MOCP), add “X” amps, found on the 62AQ
nameplate and Table 4B, to the values of MCA and
MOCP marked the RTU. If the calculated new MOCP
is nonstandard, select the next lowest size for the combined MOCP rating. If the combined MOCP rating is
now less than the MCA, select the next higher size for
the MOCP.
2. Provide a disconnect for the 62AQ unit:
• If the new MOCP is less than or equal to 30 amps, a
common non-fused disconnect for the 62AQ and
RTU may be used provided that: 1) the wire size to
62AQ is at least 10 amps; and 2) the disconnect size
is at least equal to the disconnect size marked on
the RTU plus Y marked on the 62AQ unit nameplate and Table 4B.
• If the MOCP is greater than 30 amps, provide a
FUSED DISCONNECT for the 62AQ unit sized
per the 62AQ nameplate and Table 4B.
3. Install a 460 to 230 stepdown transformer (part number HT01AH853) downstream of the 62AQ unit
disconnect.
4. Provide a disconnect for the RTU:
• If the new MOCP is less than or equal to 30 amps, a
common non fused disconnect sized per Step 2
above may be used for the 62AQ and RTU.
• If the new MOCP is less than or equal to 60 amps, a
non-fused disconnect sized per nameplate marking
may be used for this unit.
• If the new overcurrent protection device is greater
than 60 amps, and the old overcurrent protection
device was less than 60 amps, a FUSED DISCONNECT no greater than 60 amps must be provided
for this unit.
• If the old overcurrent protection device is greater
than 60 amps, a non-fused disconnect sized per
nameplate marking maybe used for this unit.
FIELD POWER SUPPLY — All units except 208/230-v
units are factory wired for the voltage shown on the nameplate.
If the 208/230-v unit is to be connected to a 208-v power supply, the transformer must be rewired by disconnecting the black
wire from the 230-v tap on the transformer and relocating it to
the 208-v tap on the transformer.
Refer to unit label diagram for additional information. Pigtails are provided for field wire connections. Use UL (Underwriters’ Laboratories) approved connector.
When installing units, provide a disconnect per the NEC.
All field wiring must comply with the NEC and local
requirements.
Install field wiring as follows:
1. Connect conduit to side panel opening.
2. Splice power lines to pigtails in splice compartment.
During operation, voltage to compressor terminals must be
within range indicated on unit nameplate (also see Tables 4A
and 4B).
INSTALLING ACCESSORY 62AQ ON A COMMON
POWER SUPPLY WITH ALL RTUs (EXCEPT RTU SIZE
014 230-V UNITS, AND 230-V 62AQ ON A 460-V
POWER SUPPLY)
Perform the following steps:
1. For the combination load ratings for minimum circuit
amps (MCA) and maximum overcurrent protective
device (MOCP), add “X” amps, found on the 62AQ
nameplate and Table 4B, to the values of MCA and
MOCP for the RTU. If the calculated new MOCP is
nonstandard, select the next lowest size for the combined MOCP rating. If the combined MOCP rating is
now less than the MCA, select the next higher size for
the MOCP.
2. Provide a disconnect for the 62AQ unit:
• If the new MOCP is less than or equal to 60 amps,
a common non-fused disconnect for the 62AQ and
RTU may be used provided that: 1) the wire size to
the 62AQ unit is at least 20 amps; and 2) the disconnect size is at least equal to the disconnect size
marked on the RTU plus Y marked on the 62AQ
nameplate and Table 4B.
• If the MOCP is greater than 60 amps, provide a
FUSED DISCONNECT for the 62AQ unit sized
per the 62AQ unit nameplate and Table 4B.
3. Provide a disconnect for the RTU:
• If the new MOCP is less than or equal to 60 amps,
a common non-fused disconnect sized per Step 2
above may be used for the 62AQ and RTU.
• If the new MOCP is greater than 60 amps, and the
old MOCP was less than or equal to 60 amps, a
FUSED DISCONNECT no greater than 60 amps
must be provided for the RTU.
• If the old overcurrent protection device is greater
than 60 amps, a non-fused disconnect sized per
nameplate marking maybe used for the RTU.
INSTALLING ACCESSORY 62AQ ON A COMMON
POWER SUPPLY WITH ALL SIZE 014 230-V RTUs
Perform the following steps:
1. For the combination load ratings for minimum circuit
amps (MCA) and maximum over current protective
31
Table 4A — Electrical Data — 62AQ
UNIT
SIZE
62AQ
V-PH-Hz
060
060GA†
100
100GA†
200
200GA†
200
200GA†
200
200GA†
300
300GA†
300
300GA†
208/230-1-60
208/230-1-60
208/230-1-60
208/230-1-60
208/230-1-60
208/230-1-60
208/230-3-60
208/230-3-60
460-3-60
460-3-60
208/230-3-60
208/230-3-60
460-3-60
460-3-60
FLA
FU
HACR
LRA
MCA
MOCP
NEC
RLA
VOLTAGE RANGE
Min
187
187
187
187
187
187
187
187
414
414
187
187
414
414
Max
254
254
254
254
254
254
254
254
506
506
254
254
506
506
COMPRESSOR
RLA
7
7
10.5
10.5
17.9
17.9
13.5
13.5
6.4
6.4
17.2
17.2
9
9
LRA
29
29
38
38
87
87
110
110
54
54
137
137
69
69
LEGEND FOR TABLE 4A AND 4B
— Full Load Amps
— Fuse
— Heating, Air Conditioning and
Refrigeration
— Locked Rotor Amps
— Minimum Circuit Amps
— Maximum Overcurrent Protection
— National Electrical Code
— Rated Load Amps
FANS MOTOR
SUPPLY
EXHAUST
FLA
FLA
—
1.1
1.1
1.1
—
2.3
2.3
2.3
—
4.2
4.2
4.2
—
4.2
4.2
4.2
—
1.9
1.9
1.9
—
6.7
5.9
6.7
—
3.2
3.6
3.2
POWER SUPPLY
MCA
9.9
11.0
15.4
17.7
26.6
30.8
21.1
25.3
9.9
11.8
28.2
34.1
14.5
18.1
MOCP*
15
15
25
25
40
40
35
35
15
15
40
40
20
20
†62AQ with factory-installed supply fan option or field-installed
accessory as shown below:
UNIT SIZE
V-PH (60 HZ)
060
100
208/230-1
208/230-1
208/230-1
208/230-3
460-3
208/230-3
460-3
200
*Fuse or HACR circuit breaker per NEC.
300
ACCESSORY FAN KIT
PART NUMBER
CRFANKIT001A00
CRFANKIT002A00
CRFANKIT003A00
CRFANKIT003A00
CRFANKIT004A00
CRFANKIT005A00
CRFANKIT006A00
Table 4B — Electrical Data —
62AQ MOCP Correction
UNIT
SIZE
62AQ
060
060GA*
100
100GA*
200
200GA*
300
300GA*
INSTALLATION COMMON POWER SUPPLY
62AQ
230 Volt RTU
460 Volt RTU
V-Ph (60 Hz)
X
Y
X
Y
208/230-1
8.1
9.3
4.1
4.7
208/230-1
9.2
11.0
4.6
5.3
208/230-1
12.8
15.0
6.4
7.4
208/230-1
15.1
17.0
7.6
8.7
208/230-1
22.1
25.0
—
—
208/230-3
17.7
20.0
—
—
460-3
—
—
8.3
9.5
208/230-1
26.3
30.0
—
—
208/230-3
21.9
25.0
—
—
460-3
—
—
10.2
12.0
208/230-3
23.9
27.0
—
—
460-3
—
—
12.2
14.0
208/230-3
29.8
34.0
—
—
460-3
—
—
15.8
18.0
HEIGHT (in.)
41/4
V-PH (60 HZ)
060
100
208/230-1
208/230-1
208/230-1
208/230-3
460-3
208/230-3
460-3
200
300
DEPTH (in.)
13 / 8
Fig. 37 — Light Commercial
Thermidistat Accessory
*62AQ with factory-installed supply fan option or field-installed
accessory as shown below:
UNIT SIZE
WIDTH (in.)
71/2
ACCESSORY FAN KIT
PART NUMBER
CRFANKIT001A00
CRFANKIT002A00
CRFANKIT003A00
CRFANKIT003A00
CRFANKIT004A00
CRFANKIT005A00
CRFANKIT006A00
programmable for up to 4 periods per day and 7 days per week.
The dehumidification output provides direct control of humidity. During power loss an internal memory stores programs and
settings for unlimited time, and the clock continues to run for at
least 8 hours. Batteries are not used.
POWER — Note that this control does not require batteries
and is not “power stealing.” It does require 24 vac (R and C
terminals) from the RTU’s low-voltage transformer to be connected to it for proper operation. The control will not operate
without these 2 connections. See Fig. 38.
DEHUMIDIFICATION EQUIPMENT AND CONNECTIONS — The dehumidification output terminals on the
Light Commercial Thermidistat must be connected to the
dehumidify input terminals on the 62AQ Energy$Recycler.
Additionally, if the RTU is equipped with optional
MoistureMi$er™ Dehumidification accessory, a relay in the
Energy$Recycler (HM) energizes the MoistureMi$er solenoid
to activate the enhanced dehumidification mode. See Light
Commercial Thermidistat installation instructions for more information on these and other applications.
Light Commercial Thermidistat Accessory
GENERAL — A Light Commercial Thermidistat Accessory
(part number TSTATCCPLH01-B) is available for each
Energy$Recycler unit for field installation to control the
Energy$Recycler. See Fig. 37.
The Light Commercial Thermidistat is a 7-day programmable, wall-mounted, low-voltage control which combines temperature and humidity control in a single unit. It provides separate set points for heating and cooling, and adds dehumidification with separate set points for occupied and unoccupied
periods. Different heating and cooling set points and times are
32
SWITCH 3 — SMART/CONVENTIONAL RECOVERY —
Selects between conventional or smart recovery from setback.
Conventional recovery changes to new set point at preprogrammed time. Smart recovery, which is active in both heating
and cooling, starts selected cycle 90 minutes earlier and
smoothly adjusts set point so room will arrive at programmed
temperature at programmed time.
NOTE: The occupied output is only energized at the preprogrammed time.
To Set:
OFF — for smart recovery. This is factory default.
ON — for conventional recovery.
SWITCH 4 — INSTALLER TEST OFF/ON — Selects a
special installer test mode that assists with checkout and troubleshooting. See Step 5 — Conduct Light Commercial Thermidistat Start-Up and Checkout.
To Set:
OFF — for normal operation. (Factory default setting.)
ON — for Installer Test mode.
FOR MOISTUREMI$ER UNITS ONLY
LIGHT
COMMERCIAL
THERMIDISTAT
ACCESSORY
Step 3 — Install
Thermidistat
Light
Commercial
Before installing Light Commercial Thermidistat, turn off
all power to RTU and 62AQ units. There may be more than
one power disconnect. Electrical shock can cause personal
injury or death. Install lockout tags on disconnects.
Fig. 38 — Light Commercial Thermidistat
Accessory Low-Voltage Connections
1. Turn off all power to equipment. Tag disconnect.
2. If an existing thermostat is being replaced:
a. Remove existing thermostat from wall.
b. Disconnect wires from existing thermostat, one at
a time.
c. As each wire is disconnected, record wire color
and terminal marking.
d. New or additional wire may be needed to accommodate added humidity outputs transformer
common.
e. Discard or recycle old thermostat.
LIGHT COMMERCIAL THERMIDISTAT
ACCESSORY INSTALLATION
Step 1 — Select Light Commercial Thermidistat
Location
Light Commercial Thermidistat should be mounted:
• Approximately 5 ft (1.5 m) from floor.
• Close to or in a frequently used room, preferably on an
inside partitioning wall.
• On a section of wall without pipes or ductwork.
The Light Commercial Thermidistat should NOT be mounted:
• Close to a window, on an outside wall, or next to a door
leading to the outside.
• Exposed to direct light and heat from a lamp, sun, fireplace, or other temperature-radiating object that may
cause a false reading.
• Close to or in direct airflow from supply registers and
return-air registers.
• In areas with poor air circulation, such as behind a door
or in an alcove.
Step 2 — Set DIP Switches — There is a 4-section
DIP switch within the Light Commercial Thermidistat which
must be properly set by the installer. It is easiest to set these 4
switches before the Light Commercial Thermidistat is mounted
to the wall, so complete the following steps first:
1. Open hinged Light Commercial Thermidistat cover.
2. Remove cover completely by gently snapping it apart
at hinge.
3. Switches are located in upper right corner of circuit
board. To change switch position, use corner of a small
screwdriver to slide switch to opposite position.
4. After switches have been set, do not reassemble the
2 halves. The rear plastic will be first mounted to wall.
SWITCH 1 — Not used
SWITCH 2 — Not used
Mercury is a hazardous waste and MUST be disposed of
properly.
3. Route wires through large hole in rear plastic. Level
rear plastic (separated from front plastic in Step 2 —
Set DIP Switches, above). Level rear plastic against
wall (for aesthetic value only — Light Commercial
Thermidistat need not be leveled for proper operation)
and mark wall through 2 mounting holes.
4. Drill two 3/16-in. mounting holes in wall where
marked.
5. Secure rear plastic to wall with 2 screws and anchors
provided. Additional mounting holes are available for
more secure mounting if needed. Make sure all wires
extend through hole in mounting base.
6. Adjust length and routing of each wire to reach proper
connector block and terminal on mounting base with
1/ -in. extra length. Strip only 1/ in. of insulation from
4
4
each wire to prevent adjacent wires from shorting
together when connected.
7. Match and connect equipment wires to proper terminals of each connector block. Remember R and C must
be connected for proper operation (see Fig. 38).
33
installations. Try it first; do not change setting unless there is
evidence of need to do so.
Unlike conventional anticipators, this setting is not determined by current draw. There is no need to measure, know, or
compensate for current draw. There is also no droop with this
Light Commercial Thermidistat. Regardless of setting and
number of stages, both heating and cooling will control to their
respective set points.
TO ADJUST:
1. Enter Configuration mode. The upper small (COOL
set point) display will be flashing 01. If not, use up and
down set point buttons to move it to 01.
2. Press SET TIME/TEMP button once to flash current
selection of 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display.
Factory default is 3.
3. Use up and down set point buttons to move to desired
anticipator setting.
4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.
Option 2 — Clean Filter Timer — Select hours of blower operation (heating, cooling, or fan) before CLEAN FILTER icon
is displayed. With OFF selected, icon will never come on,
disabling this feature. Time selection can range from 400 to
3600 blower operation hours by selecting numbers 1 through 9.
(Time is 400 times number selected.) Factory default is 2 (800
hr). Recommended blower operation hours selections are: disposable filter — 400 to 800 hr; media filter — 1200 to 1600 hr;
electronic air cleaner — 1600 to 2400 hr.
TO SELECT OR ADJUST:
1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate
02.
2. Press SET TIME/TEMP button once to display current
selection of 1, 2, 3, 4, 5, 6, 7, 8, or 9 on large display.
Factory default is 2.
3. Use up and down set point buttons to move between
available choices.
4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.
Option 3 — English/Metric — Select between Fahrenheit
and Celsius operation. Factory default is Fahrenheit.
TO SELECT OR ADJUST:
1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate
03.
2. Press SET TIME/TEMP button once to flash current
selection of F or C. Factory default is F.
3. Use up and down set point buttons to move between F
and C on large display.
4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.
Option 4 — Fan (G) On With W — This selection determines whether fan (G) output is to be ON or OFF when any W
(furnace or strip heat) output is ON. Most furnaces and fan
coils manage their own blowers and do not require separate G
signal. For these applications, select OFF. Some auxiliary heaters require separate G signal to turn on blower. In this case, select ON. Factory default is OF (off).
TO SELECT:
1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate
04.
Improper wiring or installation may damage Light Commercial Thermidistat. Check to make sure wiring is correct
before proceeding with installation or turning on power.
Refer to wiring schematic in Troubleshooting section of
this manual.
8. Push any excess wire into wall and against rear plastic.
Seal hole in wall to prevent air leaks. Leaks can affect
operation.
9. Reattach Light Commercial Thermidistat body to
mounting base by first reattaching hinge.
10. Close Light Commercial Thermidistat assembly, making sure pins on back of circuit board align with sockets in connector.
11. Turn on power to equipment.
On power up, all display segments will light for 2 seconds.
For the next 8 seconds, a 2-digit code appears on LED display
that identifies Light Commercial Thermidistat configuration:
CP — Commercial Product
Step 4 — Set Light Commercial Thermidistat
Configuration (Fig. 39 and 40) — Configuration options, like DIP switch settings, are intended to be selected at installation and normally are not modified by the owner. These
options must be made as part of the installation. A special procedure allows entry into the Configuration mode. While in configuration mode, up to 10 selections can be made. A description of each selection and how to use the Configuration mode
are as follows:
CONFIGURATION OPTIONS — SUMMARY
Option 1 — Anticipator adjustment
Option 2 — Clean filter timer adjustment
Option 3 — English/Metric selection
Option 4 — Fan (G) ON with W selection
Option 9 — Holiday heat set point
Option 10 — Holiday cool set point
Option 11 — Holiday humidity set point
Option 13 — Room temperature offset adjustment
Option 14 — Heat cool deadband adjustment
Option 21 — Keyboard lock
TO ENTER CONFIGURATION MODE — Press and hold
FAN button for approximately 10 seconds until COOL set
point display indicates a flashing “01”. The Light Commercial
Thermidistat is now in Configuration mode. It will automatically exit this mode if no button is pressed for 3 minutes. Pressing HOLD End button will exit the Configuration mode
immediately.
WHILE IN CONFIGURATION MODE — The upper small
(COOL set point) display indicates selected option number and
large display indicates selection made within that option. One of
these will be flashing. The up and down set point buttons are
used both to move between available options and to make selection for each option. When option number (small display) is
flashing, the up and down set point buttons allows for scrolling
through options moving between available option numbers.
After desired option number has been selected, press SET
TIME/TEMP button once. The large display will now flash,
indicating that up and down set point buttons now control available choices within that option. Each press of SET TIME/
TEMP button switches between available option (small display)
and available selections within each option (large display).
Option 1 — Anticipator Adjustment — This adjustment controls sensitivity and cycle rate of Light Commercial Thermidistat. Higher numbers decrease sensitivity and slow cycle
rate. Lower numbers increase sensitivity and cycle rate. Anticipator values can range from 1 to 9. Factory default is 3. This
default selection provides optimum performance in nearly all
34
shipped from the factory, so this adjustment will provide the
best accuracy when set to 0.
TO SELECT:
1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate
13.
2. Press SET TIME/TEMP button once to flash large
display.
3. Use up or down set point buttons to move between –5,
–4, –3, –2, –1, 0, 1, 2, 3, 4, or 5 on large display. Factory default is 0.
4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.
Option 14 — Heat/Cool Deadband Adjustment — This option selects the minimum difference between heating and cooling set points. A larger difference saves energy and a smaller
difference decreases temperature difference between heating
and cooling. Factory default is 2, which means cooling set
point must be a minimum of 2 degrees above heating set point.
An attempt to move them closer will result in one “pushing”
the other to maintain the required difference.
Depending on set points, moving deadband closer than
2 degrees may result in regular cycling between heat and cool
when AUTO mode is selected. However, this cycling cannot
occur more often than 1 transition every 10 minutes. The system has a built-in requirement that it cannot switch between
heat and cool without a 10-minute “off” time between the 2 operations. Specifically, to switch from one mode to the other,
there must be no demand for the old mode and a demand for
the new mode, and this must exist continually for 10 minutes
before transition to the new mode will occur.
TO SELECT:
1. Enter Configuration mode if not already there. Use up
and down set point buttons to make small display (now
flashing) indicate 14.
2. Press SET TIME/TEMP button once to flash large
display.
3. Use up or down set point buttons to move between 0,
1, 2, 3, 4, 5, or 6 on large display. Factory default is 2.
4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.
Option 21 — Keyboard Lock — This option allows the installer to disable the thermostat from being changed.
TO SELECT:
1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate
21.
2. Press SET TIME/TEMP button once to flash large
display.
3. Use up and down set point buttons to move between
OF and ON on large display. Factory default is OF,
keyboard is active.
NOTE: Once the keyboard is locked the building manager can momentarily unlock the keyboard by pressing
the following keys sequentially, MODE, COPY PREVIOUS DAY, SET TIME/TEMP, and HOLD End. The
sequence must be completed within a 5-second period,
and the keypad will be unlocked. The keypad will
return to lock once the keypad is idle for a 2-minute
period or immediately if after exiting the Configuration mode.
4. Press SET TIME/TEMP button again to flash upper
small display for selection of another option, or press
HOLD End to exit Configuration mode.
2. Press SET TIME/TEMP button once to flash large
display.
3. Use up or down set point buttons to alternate between
OFF and ON on large display.
4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.
Option 9 — Holiday Heat Set Point — This selection determines the heating set point (40 to 90 minus deadband F) when
the HOLIDAY function is active.
TO SELECT:
1. Enter Configuration mode. Use up and down buttons
to make small display (now flashing) indicate 09.
2. Press SET TIME/TEMP button once to flash large
display.
3. Use up or down set point buttons to select desired
temperature.
4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.
Option 10 — Holiday Cool Set Point — This selection determines the cooling set point (40 to 90 minus deadband F) when
the HOLIDAY function is active.
TO SELECT:
1. Enter Configuration mode if not already there. Use up
and down set point buttons to make small display (now
flashing) indicate 10.
2. Press SET TIME/TEMP button once to flash large
display.
3. Use up or down set point buttons to select desired temperature.
4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.
Option 11 — Holiday Humidity Set Point — This selection
determines the humidity set point (50 to 90% rh [relative humidity]) when the HOLIDAY function is active.
NOTE: This value can only be changed in the installer software Configuration mode.
TO SELECT:
1. Enter Configuration mode. Use up and down set point
buttons to make small display (now flashing) indicate
11.
2. Press SET TIME/TEMP button once to flash large
display.
3. Use up or down buttons to select desired humidity.
4. Press SET TIME/TEMP button again to flash small
upper display for selection of another option, or press
HOLD End to exit Configuration mode.
Option 13 — Room Temperature Offset Adjust — This option allows calibration (or deliberate miscalibration) of room
temperature sensor. There are various reasons why building
owners may want to have displayed temperature adjusted to a
higher or lower value. The selected number is number of degrees, plus or minus, which will be added to actual temperature. The numbers can range between –5 and +5. Factory default is 0. This adjusted value will be used as actual temperature for both display and control action. For example, if 2 is
selected, 72 F actual will read 74 F. If set point is 72 F, the
room will control to an actual temperature of 70 F which will
be displayed and acted upon as if it were 72 F. The effect is that
a positive number selection will make the room temperature
lower and vice versa. The Light Commercial Thermidistat is
calibrated within an accuracy of plus or minus 1 degree when
35
COPY PREVIOUS PROGRAM
DAY
CHANGE DAY
MODE
UP
HUMIDITY
FAN
DOWN
RESET
FILTER
SET TIME/TEMP
HOLIDAY
cooling may be turned off by pressing MODE button until
OFF appears. While cooling is on, successive presses of
HUMIDITY button turns the dehumidify output on and off.
While this output is active, the “DEHUM” icon will be
energized.
TO TEST PRIMARY HEATING:
Press MODE button until HEAT icon turns on. W1 heating
begins within 10 seconds and remains on for 4 minutes. This is
the Recycling mode and if the outdoor temperature is below
the balance point it will also include first stage furnace or electric heat in AC system, and heat pump heating in heat pump
system. W1 will be on for 2 minutes followed by second stage
W2 for 2 minutes. If the outdoor temperature is above the balance point, this second stage call will energize first stage furnace or electric heat in AC system and heat pump heating in
heat pump system. If the outdoor temperature is below the
balance point this second stage call will energize second stage
furnace or electric heat in AC system and heat pump system.
At the end of 4-minute run, heating stops, and MODE reverts
back to OFF. At any time during 4-minute run time, heating
may be turned off by pressing MODE button until OFF
appears. While heating is on, successive presses of HUMIDITY button turn Occupied output on and off. While this output
is active, “OC” appears in cool set point display.
HOLD
End
Fig. 39 — Light Commercial Thermidistat Keypad
Mode
OFF
OC1 UN1 OC2 UN2
HOLD HOLIDAY
DEHUM
HEAT
COOL
Mo Tu We Th
Fr Sa Su
COOL
TIME
AM
PM
AUTO
Step 6 — Make Final Settings — Be sure to return
Fan
ON**
AUTO
DIP switch no. 4 back to OFF position to exit Installer Test
mode. Assuming the system is to be left in operation after installation is complete, use MODE button to select between
HEAT, COOL, or AUTO to provide desired operation of heating, cooling, or both.
The default set points and programmed schedule are
(ONLY ONE PERIOD IS PROGRAMMED):
OCCUPIED 1 = OCCUPIED 2 = 7:00 AM;
COOL = 76 F; HEAT = 72 F
DISPLAY WILL READ OC2
UNOCCUPIED 1 = UNOCCUPIED 2 = 5:00 PM;
COOL = 85 F; HEAT = 65 F
DISPLAY WILL READ UN2
If programmed schedule is to be used, make sure the HOLD
icon is off. The schedule is energized or deenergized by pushing the HOLD End button.
If fixed temperatures are desired, push HOLD End button to
turn on HOLD icon. This will maintain set points, not allowing
them to change with programmed schedule.
During unoccupied periods the FAN button may be used to
select between AUTO (fan on only with equipment) and FAN
(fan on continuously) fan modes. During occupied periods the
fan is on continuously.
DEHUMIDIFICATION — Dehumidification is done only
during cooling. A dehumidification set point is available to the
owner in both occupied and unoccupied times. It can range
from 50 to 90 percent relative humidity. When actual humidity
is higher than set point, a dehumidification demand exists. In
the occupied period, the Light Commercial Thermidistat responds by activating its dehumidify output (DEHUM) turning
on the compressor in the Energy$Recycler unit; and when a
call for cooling exists, energizing the MoistureMi$er™ solenoid in the RTU (if the RTU is so equipped). The Energy$Recycler compressor will be started in the Occupied mode even
though a call for cooling does not exist; thus dehumidifying the
outside air before it enters the building. In the unoccupied period the humidistat will only energize the MoistureMi$er solenoid in the main unit.
However, if the humidity is below the set point in the
unoccupied period, a “mini” economizer mode will be initiated
bringing in outside air to cool the space as the first stage
of cooling, provided the outdoor air thermostat in the
Energy$Recycler unit is below its set point.
HEAT
CLEAN FILTER
PROGRAMMING
Fig. 40 — Light Commercial Thermidistat LCD
on Power Up
Step 5 — Conduct Light Commercial Thermidistat
Start-Up and Checkout — The Light Commercial
Thermidistat is designed with a built-in installer test capability.
It allows easy operation of equipment without delays or set
point adjustments to force heating or cooling. To enable Installer Test mode, move DIP switch no. 4 to ON position. To access
this switch, open case as described in Step 2 — Set DIP
Switches. Use the tip of a small screwdriver to slide switch no.
4 to ON position.
While in Installer Test mode, clock will display “InSt,” FAN
button will control fan, and MODE button will control heating
and cooling.
TO TEST FAN:
NOTE: In the Installer Test mode the fan operation is not
dependent on the occupied signal.
Fan button switches FAN icon between AUTO and ON.
While ON is displayed, G output will be on, turning fan on. Allow up to 10 seconds after button is pressed for fan to turn on
and off. On all 3 through 12.5 ton RTUs the fan continues to
operate for a minimum of 30 seconds after G signal is
removed.
NOTE: In other than the Installer Test mode the fan will run
continuously during the occupied periods. If auto fan is
selected, the fan will come on with a heating or cooling call
during the unoccupied periods and run continuously during the
occupied periods. The fan icon AUTO will be lit if auto fan is
selected and ON will be lit when the fan is on.
TO TEST COOLING AND DEHUMIDIFICATION:
Press MODE button until COOL icon turns on. Y1 cooling
begins within 10 seconds and remains on for 4 minutes. Two
minutes after Y1 comes on, the Y2 signal is energized for
2 minutes. At the end of 4-minute run, cooling stops and
MODE reverts to OFF. At any time during 4-minute run time,
36
PRE-START-UP
HOLIDAY — A holiday selection is available specifically for
times where the building will not be occupied for an extended
period. For convenience, one button selects Holiday mode
which is indicated by “HOLIDAY” icon on LED display. Holiday mode also has an automatic hold, meaning that set points
are not affected by the programmed schedule. While in Holiday mode, the system provides temperature and humidity protection for the building in all seasons, but not comfort.
Holiday Set Points — The settings for HEAT, COOL, and
DEHUM should have been done in the Configuration mode
(Options 9,10, and 11).
Failure to observe the following warnings could result in
serious personal injury.
1. Follow recognized safety practices and wear protective goggles and gloves when checking or
servicing refrigerant system.
2. Do not operate compressor or provide any electric
power to unit unless compressor terminal cover is
in place and secured.
3. Do not remove compressor terminal cover until all
electrical sources are disconnected and tagged
accordingly.
4. Relieve all pressure from system before touching
or disturbing any connections inside compressor
terminal box. If refrigerant leak is suspected
around compressor terminals, use accepted methods to recover refrigerant.
5. Never attempt to repair or solder any components
while refrigerant system is under pressure.
6. Do not use torch to remove any component. System contains oil and refrigerant under pressure. To
remove a component, wear protective goggles and
gloves and proceed as follows:
a. Shut off electrical power to unit and tag
disconnect.
b. Recover refrigerant to relieve all pressure from
system, using both high- and low-pressure
ports.
c. Cut component connection tubing with tubing
cutter, and remove component from unit.
d. Carefully unsweat remaining tubing stubs
when necessary. Oil can ignite when exposed
to torch flame.
OPERATIONAL INFORMATION
Five-Minute Compressor Time Guard ®
Device — This timer prevents compressor from starting
unless it has been off for at least 5 minutes. It can be defeated
for 1 cycle by simultaneously pressing FAN and UP buttons
simultaneously.
Fifteen-Minute Staging Timer — In multistage heating or cooling, this timer prevents any higher stage from turning on until preceding stage has been on for 15 minutes. This
timer is not in effect if temperature difference is greater than
5° F (usually due to a large change in desired temperature).
Three-Minute Minimum On Time — In normal operation, when a stage turns on, it will not turn off for a minimum of 3 minutes.
Heat/Cool Set Points (Desired Temperature) — A minimum difference of 2° F is enforced between
heating and cooling desired temperatures. This is done by
allowing one setting to “push” the other to maintain this
difference. This difference is adjustable via Configuration
Option 14.
Equipment On Indicators — When cooling equipment is on, a COOL icon preceded by a small triangle is displayed below cooling set point. While cooling equipment is delayed by the Time Guard timer, triangle will flash. The same is
true for HEAT icon and its preceding triangle located under
heating set point.
Proceed as follows to inspect and prepare the unit for initial
start-up:
1. Remove filter access panel, blower access panel, and
control panel access cover on the 62AQ unit.
2. Read and follow instructions on all WARNING,
CAUTION, and INFORMATION labels attached to
(or shipped with) unit.
3. Make the following inspections:
a. Inspect for shipping or handling damages such as
broken lines, loose parts, or disconnected wires.
b. Inspect for oil at all refrigerant tubing connections
and on unit base. Detecting oil usually indicates a
refrigerant leak. Leak-test all refrigerant tubing
connections using an electronic leak detector,
halide torch, or liquid-soap solution.
c. Inspect all field and factory wiring connections Be
sure that connections are completed and tight.
d. Inspect upper (supply) and lower (exhaust) coils
for damage and refrigerant leaks. If fin damage is
noted, carefully straighten fins using a fin comb.
4. Tighten compressor holddown bolts to 5.5 to 6.5 ft-lbs
of torque.
5. Verify the following:
a. If installed, ensure optional supply and exhaust
blower wheel set screws are tight and wheels are
centered within the blower housing.
b. Make sure supply and exhaust air filters are in
place.
Dehumidify Output On Indicators — The DEHUM
icon is on when the dehumidification output is energized.
Auto Changeover — When auto changeover mode is
selected, a change from heat to cool (or vice versa) will not occur until an opposite mode demand has existed for 10 minutes.
If set point is changed, the 10-minute requirement is deleted.
Power On Check — When AC power is first applied, all
segments of display are turned on for a few seconds. Following
this, temperature display indicates model/configuration via following 2-digit code: CP for commercial product. See Fig. 40.
Error Codes — If Light Commercial Thermidistat cannot
properly read room temperature, display will indicate two
dashes (--) and all outputs (except fan, if on) will turn off.
E4 — If Light Commercial Thermidistat’s internal memory
fails, “E4” will be displayed. Replace Light Commercial Thermidistat.
E5 — If Light Commercial Thermidistat cannot properly
read humidity, “E5” will be displayed. Replace
Light Commercial Thermidistat.
Smart Recovery — With Smart Recovery selected (DIP
SW1 is on), transition out of setback begins a fixed time period
before selected recovery time and gradually adjusts room temperature so desired temperature will be achieved at selected recovery time. The fixed time period is 1.5 hours. It operates in
both heating and cooling.
37
3. Clean coil using a commercial coil cleaner or dishwasher detergent in a pressurized spray canister. Wash
both sides of coil and flush with clean water. For
best results, backflush toward return-air section to
remove foreign material. Flush condensate pan after
completion.
4. Lower top panel and secure.
5. Inspect and replace air filter as necessary.
6. Replace access panels.
CONDENSATE DRAIN — Check and clean upper and lower condensate drain pans twice yearly or during each preventive maintenance service. Inspect and clean P-trap external to
unit. In winter, keep drain dry or protect against freeze-up.
FILTERS — Inspect and clean metal outside air inlet screen
twice yearly or as conditions require. Inspect or replace supply
(lower) and exhaust (upper) filters at the twice yearly, during
preventive maintenance services or sooner if conditions
require.
OUTDOOR AIR INLET SCREEN — Inspect and clean
metal outside air inlet screen twice yearly or as conditions require. Do not use disposable filter in place of screen.
c. Make sure the 62AQ condensate drain is of correct dimensions and primed with water to ensure
proper drainage.
d. Reinstall all access panels.
e. Ensure all tools and miscellaneous parts have been
removed.
START-UP
Unit Preparation — Make sure the unit has been installed in accordance with installation instructions and applicable codes.
Supply and Exhaust Filters — Make sure filters are
correctly installed on unit. Do not operate without filters in
place.
Outdoor-Air Inlet Screens — Outdoor-air inlet screen(s)
must be in place before operating the unit.
Compressor Mounting — Compressors are internally
spring-mounted. Ensure wooden shipping block has been removed from under the compressor and holddown bolts are in
place.
Lubrication
Internal Wiring — Check all low and high voltage con-
COMPRESSOR — The compressor is charged with the correct amount of oil at the factory.
FAN MOTOR BEARINGS — Exhaust blower motor (lower)
and optional supply motor (upper) bearings are permanently
lubricated. No further lubrication of motor is required.
ELECTRICAL COMPONENTS — Make sure all low and
high voltage electrical connections are tight and show no sign
of deterioration.
nections for proper locations. Ensure connections are tight.
Cooling — Set Light Commercial Thermidistat mode selection to Cooling and fan mode to Auto. Ensure thermostat
has been adjusted to a setting below room temperature. Refer
to Table 5 for correct unit operation.
Heating — Set Light Commercial Thermidistat mode selection to Heating and fan mode to Auto. Ensure thermostat has
been adjusted to a setting below room temperature. Refer to
Table 5 for correct unit operation.
Refrigerant Charge — Amount of refrigerant charge is
listed on unit nameplate (also refer to Table 3). Refer to Carrier
HVAC Servicing Procedure Manual (020-040), Refrigerant
Servicing section.
Unit panels must be in place when compressor is operating
during charging procedures.
Operating Sequence — Refer to Step 5 — Conduct
Light Commercial Thermidistat Start-Up and Checkout on
page 36, and Table 5 for 62AQ operating sequence.
SERVICE
IMPORTANT: Unit must operate a minimum of 10 minutes before attempting to check or adjust charge.
Cleaning — Inspect the unit interior during normal preventive maintenance cycles, or at the beginning of each heating
and cooling season and as operating conditions warrant.
EXHAUST AIR COIL (LOWER COIL)
1. Turn power off, tag disconnect with appropriate
warning.
2. Remove filter access panel and supply blower access
panel.
3. Slide filters out of unit.
4. Clean coil using a commercial coil cleaner or dishwasher detergent in a pressurized spray canister. Wash
both sides of coil and flush with clean water. For
best results, backflush toward return-air section to
remove foreign material. Flush condensate pan after
completion.
5. Inspect and replace air filter as necessary.
6. Replace access panels.
SUPPLY AIR COIL (UPPER COIL)
1. Turn power off, tag disconnect with appropriate
warning.
2. Remove screws holding top panel of 62AQ unit in
place (three accessible sides). Remove filter access
panel. Using caution, raise top panel and use filter
access door to support top panel as shown in Fig. 41.
This will support the top panel to allow for servicing
coil.
NO SYSTEM CHARGE — Refer to Carrier HVAC Servicing Procedure Manual (020-040), Refrigerant Servicing section. After evacuating system to 500 microns, weigh in the
specified amount of refrigerant. Refer to Table 3.
FILTER
ACCESS
PANEL
FILTER ACCESS
Fig. 41 — Propping Up Top Cover
Using Filter Access Panel
38
Table 5 — Light Commercial Thermidistat (LCT) Operating Sequence and System Response
UNOCCUPIED
COOLING
Indoor Temperature Above 2nd Stage
Set Point
Humidity Low & OAT Low
Humidity Low & OAT High
Humidity High & OAT Low
Humidity High & OAT High
Indoor Temperature Between 1st and
2nd Stage Set Points
Humidity Low & OAT Low
Humidity Low & OAT High
Humidity High & OAT Low
Humidity High & OAT High
Indoor Temperature Below 1st Stage
Set Point
NOTE: OAT < 55° all compression off*
HEATING
Indoor Temperature Above 1st Set
Point
Indoor Temperature Between 1st and
2nd Stage Set Points
Indoor Temperature Below 2nd Stage
Set Point
ER Comp
ER Fans
RT Comp 1
RT Comp 2
RT Fans
RT Heat
On
Off
Off
Off
On (cyc.)
Off
Off
Off
On w/o MM
On w/o MM
On w MM
On w MM
Off
w/o MM
On w MM
On w MM
On (cyc.)
On (cyc.)
On (cyc.)
On (cyc.)
Off
Off
Off
Off
Off
Off
Off
Off
On (cyc.)
Off
Off
Off
Off
On w/o MM
On w MM
On w MM
Off
Off
Off
Off
On (cyc.)
On (cyc.)
On (cyc.)
On (cyc.)
Off
Off
Off
Off
Off
Off
Off
Off
Off
Off
ER Comp.
ER Fans
RT Comps.
RT Fans
RT Heat
Off
Off
Off
Off
Off
Off
Off
Off
On (cyc.)
On, 50%
Off
Off
Off
On (cyc.)
On, 100%
ER Comp
ER Fans
RT Comp 1
RT Comp 2
RT Fan
RT Heat
On
On
On
On
On
On
On
On
On w/o MM
On w/o MM
On w MM
On w MM
On w/o MM
On w/o MM
On w MM
On w MM
On
On
On
On
Off
Off
Off
Off
Off
On
On
On
On
On
On
On
Off
On w/o MM
On w MM
On w MM
Off
Off
Off
Off
On
On
On
On
Off
Off
Off
Off
Off
On
On
On
Off
Off
Off
Off
On
On
Off
Off
ER Comp
ER Fans
RT Comps
RT Fans
RT Heat
Off
On
Off
On
Off
On
On
On
On
Off
Off
On
On
Off
On, 50%
On
On
On
On
Off
Off
On
On
On, 50%
On, 100%
OCCUPIED
COOLING
Indoor Temperature Above 2nd Stage
Set Point
Humidity Low & OAT Low
Humidity Low & OAT High
Humidity High & OAT Low
Humidity High & OAT High
Indoor Temperature Between 1st and
2nd Stage Set Points
Humidity Low & OAT Low
Humidity Low & OAT High
Humidity High & OAT Low
Humidity High & OAT High
Indoor Temperature Below 1st Stage
Set Point
Humidity Low
Humidity High
NOTE: OAT < 55° all compression off*
HEATING
Indoor Temperature Above 1st Stage
Set Point
Indoor Temperature Between 1st and
2nd Stage Set Points
OAT >Set Pt
OAT <Set Pt
Indoor Temperature Below 2nd Stage
Set Point
OAT >Set Pt
OAT <Set Pt
Comp
ER
MM
OAT
RT
Set Pt
—
—
—
—
—
—
LEGEND
Compressor
Energy$Recycler
MoistureMi$er
Outdoor-Air Temperature
Rooftop Unit
Set Point
*Unless unit compressor has been rewired as described in Step 7 (page 30).
39
2. Convert the high pressure reading to a temperature
using an R-22 temperature-pressure conversion chart.
This will now become the refrigerant saturation
temperature. The temperature measured by the thermometer is the refrigerant temperature.
3. Determine the difference between the refrigerant saturation temperature and the refrigerant temperature.
This is the amount of measured subcooling.
4. On the charging chart, locate the outdoor temperature
(numbers across the bottom).
5. Using the appropriate charging line, solid black for
Cooling mode and dashed gray for Heating mode,
compare the required subcooling on the chart to what
was recorded in Step 2. If the measured subcooling is
lower than required by the chart, add refrigerant
slowly to raise. If the measured subcooling is higher
than required by the chart, recover refrigerant slowly
to lower.
6. After making refrigerant adjustment, allow system to
operate 10 minutes and reverify subcooling is correct.
Example: Cooling Mode
Outdoor Temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 F
High Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220 psig
(Saturation temperature 108 F)
Required Subcooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 F
Liquid Line Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 86 F
(Liquid line temperature may vary by ± 3° F)
Add refrigerant to lower liquid line temperature.
Recover refrigerant to increase liquid line temperature.
SYSTEM CHARGING — Use Charging Chart, Fig. 42 on
this page as an example for the 62AQ060 unit.
NOTE: Refer to the Charging Chart Label on each unit for specific data pertaining to each size.
Vary refrigerant until the conditions of the chart are met.
Note that the charging charts are different from type normally
used. Charts are based on charging the units to the correct subcooling for various outdoor temperatures incurred during the
Cooling or Heating modes of operation. Accurate refrigerant
pressure gage and temperature sensing device capable of reading copper surface temperatures are required. Run gage line
through field entry service port (see Fig. 7 and 8).
CHARGING IN COOLING MODE — Connect the pressure
gage to the service port on the compressor hot gas Schrader
port located on the compressor discharge line. Mount the
temperature sensing device on the liquid line at the outlet of the
exhaust coil (lower coil). Insulate probe so that outdoor ambient temperature does not affect the reading. Follow directions
in To Use Heating and Cooling Charging Chart section.
CHARGING IN HEATING MODE — Connect the pressure
gage to the service port on the compressor hot gas Schrader
port located on the compressor discharge line. Mount the temperature sensing device on the liquid line at the outlet of the
supply coil (upper coil); insulate probe so that outdoor ambient
temperature does not affect the reading. Follow directions in To
Use Heating and Cooling Charging Chart section.
TO USE HEATING AND COOLING CHARGING
CHART (Fig. 42)
NOTE: Refer to the Charging Chart Label on each unit for specific data pertaining to each size.
1. Record the outdoor ambient temperature. On high
pressure gage, record discharge pressure. Record temperature of liquid line on appropriate coil.
SUBCOOLING/
SUPERHEAT DEG F
CHARGING CHART
62AQ060 R-22
70
60
50
40
30
20
10
0
HEATING
SUBCOOLING
HEATING
SUPERHEAT
(REF ONLY)
COOLING
SUBCOOLING
COOLING
SUPERHEAT
(REF ONLY)
0
10
20
30
40
50
60
70
80
90 100 110 120
AMBIENT TEMPERATURE (F)
Charge to subcooling. Superheat curve is for reference only and shows the superheat
increasing in the Cooling mode above 95 degrees when the TXV MOP feature starts controlling;
and increasing in the Heating mode below 15 degrees when the Acutrol™ Feed Device starts controlling.
Fig. 42 — 62AQ Charging Chart
40
ENERGY$RECYCLER TROUBLESHOOTING
Use Tables 6 and 7, and Fig. 43 when troubleshooting this unit.
Table 6 — Heating and Cooling Troubleshooting
PROBLEM
Compressor and outdoor fan
will not start.
Compressor will not start but
outdoor fan runs.
Compressor cycles (other
than normally satisfying
thermostat).
CAUSE
Power failure.
Fuse blown or circuit breaker tripped.
Defective thermostat, contactor, transformer, control relay, or capacitor.
Insufficient line voltage.
Incorrect or faulty wiring.
Light Commercial Thermidistat program in UC1
or UC2 mode.
Defective fan motor.
Faulty wiring or loose connection in compressor
circuit.
Compressor motor burned out, seized, or internal
overload open.
Defective run/start capacitor, overload, start relay,
Time Guard® device.
No DEHUM signal from Light Commercial
Thermidistat.
Time Guard device not timed out.
Refrigerant overcharge or undercharge.
Defective compressor.
Insufficient line voltage.
Blocked outdoor coil or dirty air filter.
Defective run/start capacitor, overload, or start
relay.
Faulty outdoor-fan (cooling) or indoor-fan (heating) motor or capacitor.
Restriction in refrigerant system.
Suction pressure greater than Defective TXV.
100 psig in Cooling mode.
Dirty air filters.
Excessive head pressure.*
Dirty coils.
Refrigerant overcharged.
Air in system.
Condensing air restricted or air short-cycling.
Low refrigerant charge.
Head pressure too low.*
Compressor valves leaking.
Restriction in liquid tube.
Excessive suction pressure.* High heat load.
Compressor valves leaking.
Refrigerant overcharged.
Dirty air filters or coils.
Suction pressure too low.*
Low refrigerant charge.
Metering device or low side restricted.
Insufficient indoor airflow.
REMEDY
Call power company.
Replace fuse or reset circuit breaker.
Replace component.
Determine cause and correct.
Check wiring diagram and rewire correctly.
Check Light Commercial Thermidistat program. See Step 5
— Conduct Light Commercial Thermidistat Start-Up and
Checkout on page 36.
Replace fan motor.
Check wiring and repair or replace.
Determine cause. Replace compressor.
Determine cause and replace.
Check for DEHUM signal on Light Commercial Thermidistat
LCD display.
Allow time for Time Guard device to recycle unit.
Recover refrigerant, evacuate system, and recharge to
nameplate.
Replace and determine cause.
Determine cause and correct.
Determine cause and correct.
Determine cause and replace.
Replace.
Locate restriction and remove.
Replace TXV.
Replace filters.
Clean coils.
Recover excess refrigerant.
Recover refrigerant, evacuate system, and recharge.
Determine cause and correct.
Check for leaks; repair and recharge.
Replace compressor.
Remove restriction.
Check for source and eliminate.
Replace compressor.
Recover excess refrigerant.
Replace filter, clean coils.
Check for leaks; repair and recharge.
Remove source of restriction.
Increase air quantity. Check filter and replace if necessary.
LEGEND
TXV — Thermostatic Expansion Valve
*Energy$Recycler uses TXVs with a 100 psig maximum operating pressure (MOP) feature to limit suction pressure
in Cooling mode at high temperatures. Always consult charging chart (page 40) for correct operating pressures.
Table 7 — Supply-Air Damper Troubleshooting
PROBLEM
Damper does not open; fan(s) off.
Damper will not close.
CAUSE
OCR not energized (thermostat in Unoccupied
mode).
OCR defective.
Damper jammed.
Damper motor defective.
Loose wiring.
Damper jammed.
Motor return spring broken.
LEGEND
OCR — Occupied Relay
41
REMEDY
Check Light Commercial Thermidistat program
settings (see Step 5 — Light Commercial Thermidistat Start-Up and Checkout section, page 36).
Replace OCR.
Free damper.
Replace damper motor.
Check wiring and correct.
Free damper.
Replace motor.
C
CAP
CC
CH
COC
COH
COMP
CR
CTD
DB
DFT
DM
DR
FC
FU
GND
HM
HPS
HR
LTLO
LPS
OCR
OATC
OATH
RVS
TRAN
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
LEGEND
Contactor
Capacitor
Compressor Contactor
Crankcase Heater
Cool Changeover Relay
Heat Changeover Relay
Compressor Motor
Cooling Relay
Compressor Time Delay
Defrost Board
Defrost Thermostat
Damper Motor
Defrost Relay
Fan Contactor
Fuse
Ground
Humidity Relay
High-Pressure Switch
Heating Relay
Low Temp Cooling Lockout
Low-Pressure Switch
Occupied Relay
Outdoor-Air Thermostat (Cool)
Outdoor-Air Thermostat (Heat)
Reversing Valve Solenoid
Transformer
Field Splice
Terminal (Marked)
Terminal (Unmarked)
Splice
Splice (Marked)
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicate common potential
only. Not to represent wiring.
NOTES:
1. If any of the original wire furnished must be
replaced, it must be replaced with 90° C wire
or its equivalent.
2. Use copper conductors only.
3. TRAN is wired for 230-v unit. If unit is to be
run with 208-v power supply, disconnect
black wire from 230-v terminal and connect
to 208-v terminal.
DFT OPEN
OPEN
RVS UNENERGIZED ENERGIZED
OF1,OF2
CLOSED
OPEN
T T= 30
0
LAST DEFROST T= 50
CYCLE
T= 90
T + 10 MIN
MAXIMUM
Fig. 43 — Typical Wiring Schematic, 62AQ Unit
42
Copyright 2000 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 1 1 1
4 4 4 4
PC 111
Catalog No. 536-215
Printed in U.S.A.
Form 62AQ-3SI
Pg 44
5-00
Replaces: 62AQ-1SI
Tab 1a 1b 5a 10a 5a 6a 6b 12a
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
ROOFTOP BASE RAIL TEMPLATE
CUT ALONG
THIS EDGE
90
DEGREE
BEND
.525
TEMPLATE
2.875”
2.25”
BUTT SHORT END
UP TO BASE OF
SCREW ON
BASE RAIL
TOP VIEW OF UNIT
CUT
45
ENERGY$RECYCLER START-UP CHECKLIST
(Remove and Store in Job File)
I. PRELIMINARY INFORMATION
ENERGY$RECYCLER MODEL NO.:
SERIAL NO.:
BASE UNIT MODEL NO.:
SERIAL NO.:
DATE:
TECHNICIAN:
II. PRE-START-UP (insert checkmark in box as each item is completed)
VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS
CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS
CHECK THAT SUPPLY AND EXHAUST AIR FILTER(S) ARE CLEAN AND IN PLACE
VERIFY THAT UNIT IS PROPERLY ATTACHED TO RTU
CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW TIGHTNESS
CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS (62AQ300 BELT
DRIVE EXHAUST FAN)
III. START-UP
ELECTRICAL
SUPPLY VOLTAGE
COMPRESSOR AMPS
INDOOR FAN AMPS
L1-L2
L1
L1
L2-L3
L2
L2
L3-L1
L3
L3
TEMPERATURES
OUTDOOR-AIR TEMPERATURE
RETURN-AIR TEMPERATURE
ENTERING SUPPLY-AIR (RTU)
DB
DB
DB
WB
WB
WB
PRESSURES (IN COOLING MODE)
REFRIGERANT SUCTION
REFRIGERANT DISCHARGE
PSIG
PSIG
TEMP AT COMPRESSOR
TEMP AT COMPRESSOR
F
F
VERIFY REFRIGERANT CHARGE USING CHARGING CHART LABEL ON UNIT.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 1 1 1
4 4 4 4
PC 111
Catalog No. 536-215
Printed in U.S.A.
Form 62AQ-3SI
Pg CL-1
5-00
Replaces: 62AQ-1SI
Tab 1a 1b 5a 10a 5a 6a 6b 12a
AIRFLOWS
CFM
SUPPLY AIR
MOTOR SPEED (Circle One)
LOW
MEDIUM
DAMPER SETTING (°) (Circle One)
EXHAUST AIR
30
HIGH
45
60
90
CFM
MOTOR SPEED (Circle One)
DAMPER SETTING (°) (Circle One)
LOW
30
MEDIUM
45
60
HIGH
90
IV. LIGHT COMMERCIAL THERMIDISTAT ACCESSORY
NOTE: To disable Keypad Lock, press MODE, COPY PREVIOUS DAY, SET TIME/TEMP, and HOLD End buttons in sequence
within 5 seconds.
PROGRAMMED
KEYPAD LOCK
Yes
Yes
No
No
OCCUPIED SETTINGS:
ROOM TEMP
ROOM RH
F
%
TIMES:
OC1
OC2
ON
OFF
TIMES:
UC1
UC2
ON
OFF
Copyright 2000 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 1 1 1
4 4 4 4
PC 111
Catalog No. 536-215
Printed in U.S.A.
Form 62AQ-3SI
Pg CL-2
5-00
Replaces: 62AQ-1SI
Tab 1a 1b 5a 10a 5a 6a 6b 12a
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE
III. START-UP (cont)