McQuay MPS-006AGCL10E Installation Manual
1
© 2007 McQuay International
Maverick I™
Commercial Packaged Rooftop System
Cooling Only or Cooling & Heating
Gas/Electric
Model MPS006AG
6 Tons
Installat
ion and Ma
intenance Manual
IM 861
Group: Applied Systems
Part Number: 92-102421-03-00
Date: March 2007
2 IM 861
Table of Contents
Table of Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Checking Product Received . . . . . . . . . . . . . . . . . . . . 3
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Outside Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Attaching Exhaust and Combustion Air Inlet Hoods. . . . . . . . . . . 9
Cover Panel Installation/Conversion Procedure. . . . . . . . . . . . . . 9
Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Rooftop Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Ducting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Return Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Gas Supply, Condensate Drain and Piping . . . . . . . 11
Gas Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
LP Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Adjusting or Checking Furnace Input . . . . . . . . . . . . . . . . . . . . . 12
Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Hook-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Furnace Section Controls and Ignition System . . . 15
Normal Furnace Operating Sequence . . . . . . . . . . . . . . . . . . . . 15
Single Stage Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
To Start Furnace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
To Shut Down Furnace. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Burners. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Manual Reset Overtemperature Control . . . . . . . . . . . . . . . . . . 17
Pressure Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Limit Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
System Operating Information . . . . . . . . . . . . . . . . . 17
Advise the Customer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Furnace Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Cooling Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Cleaning Evaporator Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Cleaning Condenser Coil, Condenser Fan,
Circulation Air Blower and Venturi . . . . . . . . . . . . . . . . . . . 18
Re-assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Replacement Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Wiring Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
IM 861
3
Introduction
This manual contains the installation and operating
instructions for your packaged rooftop unit. There are some
precautions that should be taken to derive maximum
satisfaction from it. Improper installation can result in
unsatisfactory operation or dangerous conditions.
Read this manual and any instructions packaged with separate
equipment required to make up the system prior to installation.
Give this manual to the owner and explain its provisions. The
owner should retain this manual for future reference.
Checking Product Received
Upon receiving the unit, inspect it for any damage from
shipment. Claims for damage, either shipping or concealed,
should be filed immediately with the shipping company.
IMPORTANT: Check the unit model number, heating size,
electrical characteristics, and accessories to determine if they
are correct.
Specifications
General
The Combination Gas Heating/Electric Cooling Rooftop is
available in 100,000 & 135,000 BTU/Hr. heating inputs and
cooling capacities of 6 nominal tons of cooling. Units are
convertible from bottom supply and return to side supply and
return by relocation of supply and return air access panels. See
cover installation detail.
The units are weatherized for mounting outside of the
building.
The following information is for three phase units which are
not covered under the DOE certification program.
1 The energy consumption of the ignition system used with
this unit is 9 watts.
2 The efficiency rating of this unit is a product thermal
efficiency rating determined under continuous operating
conditions independent of any installed system.
Major Components
The unit includes two hermetically-sealed refrigerating
systems (consisting of scroll compressors, condenser coil,
evaporator coil with capillary tube assembly), a circulation air
blower, a condenser fan, a heat exchanger assembly, gas
burner and control assembly, combustion air motor and fan,
and all necessary internal electrical wiring. The cooling
system of these units is factory-evacuated, charged and
performance tested. Refrigerant amount and type are indicated
on rating plate.
The manufacturer’s warranty does not cover any damage or
defect to the air conditioner caused by the attachment or
use of any components, accessories or devices (other than
those authorized by the manufacturer) into, onto or in
conjunction with the air conditioner. You should be aware
that the use of unauthorized components, accessories or
devices may adversely affect the operation of the air
conditioner and may also endanger life and property. The
manufacturer disclaims any responsibility for such loss or
injury resulting from the use of such unauthorized
components, accessories or devices.
▲▲
DANGER
!
Recognize this symbol as an indication of
Important Safety Information!
!
Units are not design certified to be installed inside the
structure. Doing so can cause inadequate unit performance
as well as property damage and carbon monoxide
poisoning resulting in personal injury or death.
▲▲
DANGER
!
4 IM 861
Safety Information
Use only with type of gas approved for this unit. Refer to the
unit rating plate.
▲▲
WARNING
!
Install this unit only in a location and position as specified in
the location requirements and considerations section of
these instructions. Provide adequate combustion and
ventilation air to the unit space as specified in the venting
section of these instructions.
▲▲
WARNING
!
Provide adequate combustion and ventilation air to the unit
space as specified in the combustion and ventilation air
section of these instructions.
▲▲
WARNING
!
Combustion products must be discharged outdoors.
Connect this unit to an approved vent system only, as
specified in Vent Pipe Installation section of these
instructions.
▲▲
WARNING
!
Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically for
the detection of leaks to check all connections, as specified
in Gas Supply and Piping section of these instructions.
▲▲
WARNING
!
Always install unit to operate within the unit's intended
temperature-rise range with a duct system which has an
external static pressure within the allowable range, as
specified in ducting section of these instructions. See also
unit rating plate.
▲▲
WARNING
!
When a unit is installed so that supply ducts carry air
circulated by the unit to areas outside the space containing
the unit, the return air shall also be handled by duct(s)
sealed to the unit casing and terminating outside the space
containing the unit.
▲▲
WARNING
!
This unit may be used to heat the building or structure
during construction if the following installation requirements
are met. Installation must comply with all installation
instructions including:
• Proper vent installation;
• Furnace operating under thermostatic control;
• Return air duct sealed to the furnace;
• Air filters in place;
• Set furnace input rate and temperature rise per rating
plate marking;
• Means of providing outdoor air required for combustion;
• Return air temperature maintained between 55°F (13°C)
and 80°F (27°C); and
• Installation of exhaust and combustion air inlet hoods
completed;
• Clean furnace, duct work and components upon
substantial completion of the construction process, and
verify furnace operating conditions including ignition, input
rate, temperature rise and venting, according to the
instructions.
▲▲
WARNING
!
IM 861
5
Figure 1: Bottom View
Figure 2: Cabinet Dimensions and Access Locations
Unit Dimensions
For clearances see page 9, Fgure 7. IMPORTANT: This unit
must be mounted level in both directions to allow water to drain
from the condenser section and condensate pan.
ST-A0801-11-00
ST-A0801-12
CONDENSER
COIL
BASE ELECTRICAL
ENTRY
BASE GAS
ENTRY
RETURN
SUPPLY
39.31
9.56
3.25
4.5
4.5
2.25
2
2
26
20
2
2
78.25
6.81
44.13
13.13
4.63
13.13
14.44
RETURN COVER/
OPTIONAL OUTDOOR
AIR HOOD LOCATION
CONDENSATE DRAIN
3/4” NPT FEMALE
BLOWER
ACCESS
COIL/FILTER
ACCESS
SUPPLY COVER
31.19
3.81
82.25
24.03
48.06
5.34
6 IM 861
Figure 3: Cabinet Dimensions and Access Locations
Figure 4: Supply and Return Dimensions for Horizontal Applications – Back View
ST-A0801-16
ST-A0801-13-00
FLUE OUTLET
SUPPLY GAS
ENTRY
1/2” NPT
COMBUSTION
AIR INLET
BURNER ACCESS
COMPRESSOR/
CONTROL BOX
ACCESS
CONTROL ENTRY
POWER ENTRY
46.5
7.22
30.25
35
81.53
17.75
14.63
12.69
RETURN
AIR
RETURN AIR FILLER
(REMOVABLE PLATE)
SUPPLY
AIR
19.125
25.13
6.84
32.72
12.25
35
5.5
12.25
82.25
4.94
IM 861
7
006AGC*10 3-60-208-230 11.2/11.2 77 2.6 3.8 34/34 40/40 40/40 BLT (4) 2 X 16.0 X 16.0 16.6 2 4000 176 690 699
(51 X 406 X 406) (1.542) (1888) (4990) (313.0) (317.1)
006AGD*10 3-60-460 5.9 39 1.0 1.9 18 20 20 BLT (4) 2 X 16.0 X 16.0 16.6 2 4000 176 690 699
(51 X 406 X 406) (1.542) (1888) (4990) (313.0) (317.1)
006AGY*10 3-60-575 4.7 31 .9 1.0 14 15 15 BLT (4) 2 X 16.0 X 16.0 16.6 2 4000 176 690 699
(51 X 406 X 406) (1.542) (1888) (4990) (313.0) (317.1)
006AGC*13 3-60-208-230 11.2/11.2 77 2.6 3.8 34/34 40/40 40/40 BLT (4) 2 X 16.0 X 16.0 16.6 2 4000 176 690 699
(51 X 406 X 406) (1.542) (1888) (4990) (313.0) (317.1)
006AGD*13 3-60-460 5.9 39 1.0 1.9 18 20 20 BLT (4) 2 X 16.0 X 16.0 16.6 2 4000 176 690 699
(51 X 406 X 406) (1.542) (1888) (4990) (313.0) (317.1)
006AGY*13 3-60-475 4.7 31 .9 1.0 14 15 15 BLT (4) 2 X 16.0 X 16.0 16.6 2 4000 176 690 699
(51 X 406 X 406) (1.542) (1888) (4990) (313.0) (317.1)
MODEL
NUMBER
MPS
PHASE
FREQUENCY
(HZ)
VOLTAGE
(VOLTS)
COMPRESSORS
RATED
LOAD
AMPERES
(RLA)
(EACH) (EACH)
LOCKED
ROTOR
AMPERES
(LRA)
DRIVE
TYPE
MINIMUM
CIRCUIT
AMPACITY
AMPERES
FULL LOAD
AMPERES
(FLA)
COND.
FAN
MTR
BLWR
MTR
FUSE OR HACR
CIRCUIT BREAKER
R22
OZ.
(G)
FILTER
RECOMMENDED
NO. AND SIZE
(MM X MM X MM)
OUTDOOR COIL
MINIMUM
AMPS
MAXIMUM
AMPS
AREA
SQ. FT
(SQ. M)
WEIGHT
NET
LB.
(KG)
SHIP
LB.
(KG)
NO.
ROWS
CFM
(L/S)
ELECTRICAL PHYSICAL
TABLE 1
MPS006A ELECTRICAL & PHYSICAL DATA
*Denotes “L” or “M” Drive Package
8 IM 861
Installation
General
1 INSTALLATION — Install this unit in accordance with
The American National Standard Z223.1-latest edition
manual entitled “National Fuel Gas Code,” and the
requirements or codes of the local utility or other
authority having jurisdiction.
Additional helpful publications available from the
“National Fire Protection Association” are: NFPA-90A Installation of Air Conditioning and Ventilating Systems
1985 or latest edition. NFPA-90B - Warm Air Heating
and Air Conditioning Systems 1984.
These publications are available from:
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
2 PRE-INSTALLATION CHECK-POINTS — Before
attempting any installation, carefully consider the
following points:
Structural strength of supporting members
(Rooftop Installation)
Clearances and provision for servicing
Power supply and wiring
Gas supply and piping
Air duct connections and sizing
Drain facilities and connections
Location for minimum noise and vibration - away from
bedroom windows
Location Considerations
The metal parts of this unit may be subject to rust or
deterioration in adverse environmental conditions. This
oxidation could shorten the equipment’s useful life. Salt spray,
fog or mist in seacoast areas, sulphur or chlorine from lawn
watering systems, and various chemical contaminants from
industries such as paper mills and petroleum refineries are
especially corrosive.
IIff tthhee uunniitt iiss ttoo bbee iinnssttaalllleedd iinn aann aarreeaa wwhheerree ccoonnttaammiinnaannttss
aarree lliikkeellyy ttoo bbee aa pprroobblleemm,, ggiivvee ssppeecciiaall aatttteennttiioonn ttoo tthhee
eeqquuiippmmeenntt llooccaattiioonn aanndd eexxppoossuurree..
1 Avoid having lawn sprinkler heads spray directly on the
unit cabinet.
2 In coastal areas locate the unit on the side of the building
away from the waterfront.
3 Shielding by a fence or shrubs may give some protection.
1 Frequent washing of the cabinet, fan blade and coil with
fresh water will remove most of the salt or other
contaminants that build up on the unit.
2 Regular cleaning and waxing of the cabinet with a good
automobile polish will provide some protection.
3 A good liquid cleaner may be used several times a year to
remove matter that will not wash off with water.
Several different types of protective coatings are offered in
some areas. These coatings may provide some benefit, but the
effectiveness of such coating materials cannot be verified by
the equipment manufacturer.
The best protection is frequent cleaning, maintenance and
minimal exposure to contaminants.
Outside Installation
(Typical outdoor slab installation is shown in Figure 5.)
1 Select a location where external water drainage cannot
collect around unit.
2 Provide a level slab sufficiently high enough above grade
to prevent surface water from entering the unit
3 The location of the unit should be such as to provide
proper access for inspection and servicing as shown in
Figure 7.
Figure 5: Outside Slab Installation. Closet Distribution
System. Slab Floor Construction
I298
Disconnect all power to unit before starting maintenance.
Failure to do so can cause electrical shock resulting in
personal injury or death. Regular maintenance will reduce
the buildup of contaminants and help to protect the unit’s
finish.
▲▲
DANGER
!
These units are designed certified for outdoor installation
only. Installation inside any part of a structure can result in
inadequate unit performance as well as property damage.
Installation inside can also cause recirculation of flue
products into the conditioned space resulting in personal
injury or death.
▲▲
DANGER
!
IM 861
9
4 Locate unit where operating sounds will not disturb
owner or neighbors.
5 Locate unit so roof runoff water does not pour directly on
the unit. Provide gutter or other shielding at roof level.
Do not locate unit in an area where excessive snow
drifting may occur or accumulate.
6 Where snowfall is anticipated, the height of the unit
above the ground level must be considered. Mount unit
high enough to be above anticipated maximum area
snowfall and to allow combustion air to enter the
combustion air inlet.
7 Select an area which will keep the areas of the vent, air
intake, and A/C condenser fins free and clear of
obstructions such as weeds, shrubs, vines, snow, etc.
Inform the user accordingly.
Attaching Exhaust and Combustion Air Inlet
Hoods
IMPORTANT: Do not operate this unit without the exhaust/combus-
tion air inlet hood properly installed. This hood is shipped in a carton
in the blower compartment inside the unit and must be attached
when the unit is installed. See Figure 3.
To attach exhaust/combustion air inlet hood:
1 Remove screws securing blower access panel and remove
access panel. For location of blower access panel, see Figure
2.
2 Remove exhaust/combustion air inlet hood from the carton,
located inside the blower compartment.
3 Attach blower access panel.
4 Attach the combustion air inlet/exhaust hood with screws.
Reference Figure 3 for proper location. Screws are in carton
with the hood.
5 Vent the unit using the flue exhaust hood, as supplied from
the factory, without alteration or addition. The only
exception is with factory approved additions. Consult your
local utility or other authority having jurisdiction for
accepted venting techniques.
Cover Panel Installation/Conversion Procedure
Downflow to Horizontal
1 Remove the screws and covers from the outside of the
supply and return sections.
2 Install the covers in the bottom supply and return
openings with the painted side up. See Figure 6. Use the
existing gasket to seal the covers.
3 Secure the supply cover to the base of the unit with 1
screw, engaging prepunched tab in unit base.
4 Secure the return cover to the base of the unit with screws
engaging prepunched holes in the unit base.
Filters
This unit is provided with 4 - 16” X 16” X 2” disposable
filters. When replacing filters, ensure they are inserted fully to
the back to prevent bypass.
Clearances
The following minimum clearances must be observed for
proper unit performance and serviceability. Reference Figure 7.
NOTE: Supply duct may be installed with “0” inch clearance to
combustible materials, providing 1ⴖ minimum Fiberglass
insulation is applied either inside or on the outside of duct.
Recommended
Clearance
Location
48ⴖ A - Front
18ⴖ B - Condenser Coil
12ⴖ* C - Duct Side
36ⴖ D - Evaporator End
60ⴖ E - Above
*Without Economizer. 57 With Economizer
Figure 6: Cover gasket detail for units shipped for
downflow application being converted to horizontal.
I631
Figure 7: Clearances
I297
10 IM 861
Rooftop Installation
1 Before locating the unit on the roof, make sure that the
roof structure is adequate to support the weight involved.
(See Electrical & Physical Tables in this manual.) THIS
IS VERY IMPORTANT AND THE INSTALLER’S
RESPONSIBILITY.
2 For rigging and roofcurb details, see Figures 8, 9, 10 and
11.
3 The location of the unit on the roof should be such as to
provide proper access for inspection and servicing.
IMPORTANT: If unit will not be put into service immediately,
block off supply and return air openings to prevent excessive
condensation.
Ducting
The installing contractor should fabricate ductwork in
accordance with local codes. Use industry manuals as a guide
when sizing and designing the duct system. Contact Air
Conditioning Contractors of America, 1513 16th St. N.W.,
Washington, D.C. 20036.
Place the unit as close to the conditioned space as possible
allowing clearances as indicated. Run ducts as directly as
possible to supply and return outlets. Use of non-flammable
weatherproof flexible connectors on both supply and return
connections at unit to reduce noise transmission is
recommended.
On ductwork exposed to outside temperature and humidity,
use a minimum of 2ⴖ of insulation and a vapor barrier.
Distribution system in attic, furred space or crawl space should
be insulated with at least 2ⴖ of insulation.
1
⁄2ⴖ to 1ⴖ thick
insulation is usually sufficient for ductwork inside the air
conditioned space.
Provide balancing dampers for each branch duct in the supply
system. Properly support ductwork from the structure.
IMPORTANT: In the event that the return air ducts must be run
through an “unconfined” space containing other fuel burning
equipment, it is imperative that the owner must be informed
against future changes in construction which might change this
to a “confined space.” Also, caution the owner against any future
installation of additional equipment (within the existing
unconfined and/or confined space which might create a negative
pressure within the vicinity of other solid, liquid, or gas fueled
units.
Return Air
Figure 8: Flat rooftop installation, attic or drop ceiling
distributing system. Mounted on roofcurb. Curb must be
level.
I299
Never allow products of combustion or the flue products to
enter the return air ductwork, or the circulating air supply. All
return ductwork must be adequately sealed and secured to
the furnace with sheet metal screws, and joints taped. All
other duct joints must be secured with approved
connections and sealed airtight.
Failure to prevent products of combustion from being
circulated into the living space can create potentially
hazardous conditions, including carbon monoxide poisoning
that could result in personal injury or death.
▲▲
DANGER
!
Do not, under any circumstances, connect return ductwork
to any other heat producing device such as fireplace insert,
stove, etc. Unauthorized use of such devices may result in
fire, carbon monoxide poisoning, explosion, personal injury,
property damage or death.
▲▲
DANGER
!
I296
SPREADER BAR
A
B
D
C
LIFTING BEAM
CABLE OR CHAIN
5/8ⴖ SHACKLE
(EACH CORNER)
39ⴖ
26
1
⁄
8
CENTER
OF
GRAVITY
CORNER WEIGHTS BY PERCENTAGE
AB C D
23% 29% 21% 27%
Figure 9: Lifting Detail
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