Drummond MRC-24CWN1-M13T User manual

INSTALLATION INSTRUCTIONS
PACKAGE 13 SEER - AIR CONDITIONER
2 - 5 TONS.
MAN-I-IDP13-0418
MRC-24CWN1-M13T, MRC-36CWN1-M13L,
MRC-48CWN1-M13L, MRC-60CWN1-M13L.
R-410A Refrigerant

23
.......14
....14
...... 19
TER……………………………....................…19
9................................................................................................1
SIGNALS.......................................................................................20
22
22
......21
A/C SYSTEM................................................19
/C SYSTEM..................................................19
A/C SYSTEM................................................19
A/C SYSTEM................................................17
….15
….14
TABLE OF CONTENTS
1.0 SAFETY...........................................................................................................................3
1.1 INSPECTION............................................................................................................4
1.2 LIMITATIONS............................................................................................................4
2.0 INSTALLATION...............................................................................................................4
2.1 PRE-INSTALLATION.................................................................................................4
2.2 CLEARANCE............................................................................................................5
2.3 RIGGING AND HANDING........................................................................................5
3.0 DUCTWORK...................................................................................................................8
4.0 CONDENSATE DRAIN CONNECTION..........................................................................8
4.1 INSTALL DRAIN PIPE………………………………………………..............................8
5.0 FILTERS....................................................................................................................
.....9
6.0 ELECTRICAL WIRING............................................................................................. .....9
6.1 POWER WIRING......................................................................................................9
6.2 GROUNDING..........................................................................................................10
6.3 CONTROL WIRING................................................................................................10
7.0 AIRFLOW PERFORMANCE.....................................................................................
7.1 AIRFLOW PERFORMANCE DATA…………………………………...................
8.0 SYSTEM OPERATION………………………………………………………...............
8.1 COMPRESSOR CRANKCASE HEA
8.2 PROTECTION........
8.3 THERMOSTAT
9.0 OPERATION CHECK-UP..............................................................................................
10.0 TROUBLE SHOOTING ..............................................................................................
LIST OF TABLES
TABLE 2-1 UNIT CLEARANCE………………………………………..………..........…………7
TABLE 6-1 13 SEER COOLING ONLY W/WITHOUT ELECTRIC HEAT..................…......12
TABLE 7-1 DUCT APPLICATION(208V)….........….....…...............…................….........
TABLE 7-2 DUCT APPLICATION(230V)….........….....…...............…................….........
TABLE 7-3 REFRIGERANT CHARGE FOR
TABLE 7-4 REFRIGERANT CHARGE FOR
TABLE 7-5 REFRIGERANT CHARGE FOR
TABLE 7-6 REFRIGERANT CHARGE FOR
TABLE 8-1 THERMOSTAT SIGNALS………………………………………….................
FIG. 2-1 COMPONENT LOCATION.....………………………………...............…..................5
FIG. 2-2 UNIT DIMENSIONS…………………………………………......................................6
FIG. 2-3 UNIT DIMENSIONS…………………………………………......................................7
FIG. 6-1 TYPICAL FIELD CONTROL WIRING DIAGRAM…………………….....………....11
FIG. 6-2 TYPICAL FIELD POWER WIRING DIAGRAM…………………………………......11
AC SYSTEM WIRING DIAGRAM (GMCC & LG COMPRESSOR)...................................
LIST OF FIGURES
TABLE 6-2 13 SEER PSYCAL DATA.......................................................................…......13
WARNING
These instructions are intended as an aid to qualified,
licensed service personnel for proper installation,
adjustment and operation of this unit. Read these
instructions thoroughly before attempting installation
or operation. Failure to follow these instructions may
result in improper installation, adjustment, service or
maintenance possibly resulting in fire, electrical shock,
property damage, personal injury or death.
RECOGNIZE THIS SYMBOL AS AN INDICATION OF IMPORTANT SAFETY INFORMATION
DO NOT DESTROY THIS MANUAL
Please read carefully and keep in a safe place for future reference by a serviceman.

conditioner caused by the attachment or use of any components, accesso-
may also endanger life and property. The manufacturer disclaimer any
ries or devices (other than those authorized by the manufacturer).
The manufacturer’s warranty does not cover any damage or defect to the air
3
This document is customer property and is to remain with this unit.
These instructions do not cover all the different variations of systems nor
does it provide for every possible contingency to be met in connection with
installation.
All phases of this installation must comply with NATIONAL, STATE and
LOCAL CODES. If additional information is required please contact your local
distributor.
1.0 SAFETY
WARNING
These instructions are intended as an aid to qualified, licensed service
personnel for proper installation, adjustment and operation of this unit. Read
these instructions thoroughly before attempting installation or operation.
Failure to follow these instructions may result in improper installation, adjust-
ment, service or maintenance possibly resulting in fire, electrical shock, prop-
erty damage, personal injury or death.
WARNING
You should be aware that the use of unauthorized components, accessories
or devices may adversely affect the operation of the air conditioner and
responsibility for such loss or injury resulting from the use of such
unauthorized components, accessories or devices.
WARNING
Disconnect all power to the unit before starting maintenance. Failure to do
so can result in severe electrical shock or death.
WARNING
Do not, under any circumstances, connect return ductwork to any other heat
producing device such as a fireplace insert, stove, etc. Unauthorized use of
such devices may result in fire, carbon monoxide poisoning, explosion,
property damage, severe personal injury or death.
WARNING: This is a safety alert symbol indicating a potential hazard-
ous situation, which could result in personal injury, property and/or
product damage or death.
CAUTION: This is a safety alert symbol indicating a potential hazard-
ous situation, which could result in moderate personal injury, property
and/or product damage.
When you see the symbols below on the labels or in the manuals, be alert to
the potential or immediate hazards of personal injury, property and/or product
damage. It is the owner’s or installer’s responsibility to comply with all safety
instructions and information accompanying these symbols.

4
WARNING
The unit must be permanently grounded. A grounding lug is provided. Failure to
ground this unit can result in fire or electrical shock causing property damage,
severe personal injury or death.
WARNING
Only electric heater kits supplied by this manufacturer as described in this
publication have been designed, tested, and evaluated by a nationally recog-
nized safety testing agency for use with this unit. Use of any other manufac-
tured electric heaters installed within this unit may cause hazardous conditions
resulting in property damage, fire, body injury or death.
WARNING
Proposition 65: This appliance contains fiberglass insulation. Respirable
particles of fiberglass are known to the state of California to cause cancer.
As soon as unit is received, it should be inspected and noted for possible shipping
damage during transportation. It is carrier’s responsibility to cover the cost of
shipping damage. Manufacturer or distributor will not accept the claims from dealer
for any transportation damage.
1.1 INSPECTION
Refer to Fig. 2-2, 2-3 for unit physical data and to Table 6-1 & 6-2 for electrical
data.If components are to be added to a unit they must meet local codes, they are
to be installed at the dealer’s and /or the customer’s expense.
Size of unit for proposed installation should be based on heat loss / heat gain
calculations made in accordance with industry recognized procedures identified
by the Air conditioning contractors of America.
1.2 LIMITATIONS
2.0 INSTALLATION
2.1 PRE-INSTALLATION
Before installation, carefully check the following:
1. Unit should be installed in accordance with national and local safety codes,
including but not limit to ANSI/NFPS No. 70 or Canadian Electrical Code Part 1,
C22.1, local plumbing and wastewater codes and any other applicable codes.
2. For rooftop installation, be sure the structure has enough strength to support
the weight of unit. Unit should be installed on roof curb and leveled.
3. For ground level installation, a level slab should be used.
4. Condenser airflow should not be restricted.
5. On applications when a roof curb is used, the unit must be positioned on the
curb so the front of the unit is tight against the curb.

* The above figure for reference purpose only.
5
2.2 CLEARANCE
All units require certain clearance for proper operation and service. Refer to
Table 2-1 for the clearances required for construction, servicing and proper
unit operation.
2.3 RIGGING AND HANDING
Exercise care when moving the unit. Do not remove any packaging until the
unit is near the place of installation. Rig the unit by attaching chain or cable
slings to the lifting holes provided in the base rails. Spreader bars, whose
length exceeds the largest dimension across the unit, MUST be used across
the top of the unit.
CAUTION
Before lifting, make sure the unit weight is distributed equally on the rigging
cables so it will lift evenly.
Units may be moved or lifted with a forklift. Slotted openings in the base rails
are provided for this purpose.
All panels must be secured in place when the unit is lifted.
The condenser coils should be protected form rigging cable damage with
plywood or other suitable material.
CAUTION
Fig. 2-1 Component Location
Compressor
Highly efficient enhanced
copper tube / aluminum fin
indoor coil
Compressor
contactor
Low voltage
terminal block
Blower motor with
slide-out blower assembly
Decorative
protective coil
guard
Heavy gauge removable
base rails
Condenser fan motor
Electric heater assembly (optional)
Highly efficient enhanced copper
tube/Aluminum fin outdoor coil

024, 036
6
Electrical service access
compapartment panel Condensate drain
connection 3/4” NPTI
(Trap required)
Left
Condenser coil
Front
Fig. 2-2 Unit Dimensions
Low vlotage entrance 7/8” Dia.
High voltage conn. 1-23/64” Dia.
Unit size：
* The above figure for reference purpose only.
Hi./Lo. pressure
detected valve
1/4’’ SAE
Side supply
air opening
Side return
air opeing
14-1/2"
3-55/64"
14-1/2"
2-31/32"
14-1/2" 4-17/64"
51-29/64"
24-13/16"
2-3/8"
3-23/32"
5-1/2"
2-31/32"
18-29/32"
37-23/32"
19"

048, 060
7
Fig. 2-3 Unit Dimensions
Electrical service access
compapartment panel
Condensate drain
connection 3/4” NPTI
(Trap required)
Front
Left
Unit size：
Condenser coil
Side supply
air opening
Side return
air opeing
* The above figure for reference purpose only.
Low vlotage entrance 7/8” Dia.
High voltage conn. 1-23/64” Dia.
Direction Distance (in.)
Direction Distance (in.)
Top
Front
Rear
Right
Left
Bottom
30
60
18
12
24
0
Duct clearance: 1 inch clearance for all sides of air supply duct.
1. Units must be installed outdoors. Over hanging structure or shrubs should not obscure condenser air discharge outlet.
2. The minimum clearance without economizer/fresh air damper. For distance with Economizer/fresh air damper, please refer to the
relevant Install requiremnt.
3. Units may be installed on combustible floors made from wood or class A, B or C roof covering materials.
Table 2-1: Unit Clearance
NOTE
For units applied with a roof curb, the minimum clearance may be reduced from 1 inch to 1/2 inch between
combustible roof curb material and this supply air duct.
1
3
2
Hi./Lo. pressure
detected valve
1/4’’ SAE
14-1/2"
33-3/64"
2-3/8"
5-1/2"
2-31/32"
21-7/8" 57-61/64"
4-17/64"
14-1/2" 14-1/2" 4-49/64"
19"
42"
5-11/16"
3-23/32"

8
3.0 DUCTWORK
NOTE
On ductwork exposed to outside air conditioning space, use at least 2” of
insulation and a vapor barrier. Flexible joint may be used to reduce noise.
4.0 CONDENSATE DRAIN CONNECTION
1. Use female NPT threaded fitting for outside connection and make sure that
drain holes are not blocked.
2. Insulation may be needed for drain line to prevent sweating.
3. Drain pan has two drain connections on each side to provide flexibility of
connection and drainage. Make sure proper pitch and plugging if second
connection is not used.
4. Use a sealing compound on male pipe threads. Install the condensate
drain line (NPT) to spill into an open drain.
A closed return duct system shall be used. This shall not preclude use of
economizers or ventilation air intake. Flexible joints may be used in the
supply and return duct work to minimize the transmission of noise.
When fastening duct work to the side duct flanges on the unit, insert the
screws through the duct flanges only. DO NOT insert the screws through
the casing. Outdoor duct work must be insulation and waterproofed.
CAUTION
NOTE
Be sure to note supply and return openings. Refer to Fig. 2-2 and 2-3
for information concerning supply and return air duct openings.
Consult local codes for special requirements.
To provide extra protection from water damage, install an additional drain pan,
provided by installer, under the entire unit with a separate drain line. Manufac-
turer will not be responsible for any damages due to the failure to follow these
requirements.
4.1 INSTALL DRAIN PIPE
Ductwork should be made and sized by installer and in accordance with Air
Manual from Conditioning Contractors of America and local codes.

9
6.1 POWER WIRING
1. Proper electrical power should be available at unit. Voltage tolerance should not
be over 10% from rating voltage.
2. If any of the wire must be replaced, replacement wire must be the same type
as shown in nameplate, wiring diagram and electrical data sheet.
3. Install a branch circuit disconnect of adequate size to handle starting current,
located within sight of, and readily accessible to the unit.
4. ELECTRIC HEATER - If the Electric Heater is installed, unit may be equipped
with 30~60A. circuit breakers or fuse. These breaker(s) protect the internal wiring
in the event of a short circuit and serve as a disconnect. Circuit breakers installed
within the unit do not provide over-current protection of the supply wiring and
therefore may be sized larger than the branch circuit protection.
• Supply circuit power wiring must be 221 °F minimum copper conductors only.
See Electrical Data in this section for ampacity, wire size and circuit protector
requirements. Supply circuit protective devices may be either fuses or “HACR”
type circuit breakers.
• Two 1-3/8” knockouts on the back panel are provided for connection of power
wiring to electric heater.
• Power wiring is connected to the power terminal block in unit electric heater
cabinet.
See Electrical Heater Installation Instruction for details.
6.0 ELECTRICAL WIRING
Field wiring must comply with the National Electric Code (NEC) or Canadian
Electrical Code (CEC) and any applicable local ordinance.
WARNING
Disconnect all power to unit before installing or servicing. More than one
disconnect switch may be required to de-energize the equipment. Hazard-
ous voltage can cause severe personal injury or death.
Units are shipped without a filter or filter racks. It is the responsibility of the
installer to secure a filter in the return air ductwork or install a filter/frame Kit.
Filter must always be used and must be kept clean. When filter become dirt
laden, insufficient air will be delivered by the blower, decreasing your units
efficiency and increasing operation costs and wear-and tear on the unit and
controls.
Filters should be checked monthly; this is especially important since this unit is
used for both heating and cooling.
5.0 FILTERS

10
• Make sure, after installation, separation of control wiring and power wiring
has been maintained.
6.2 GROUNDING
WARNING
The unit must be permanently grounded. Failure to do so can result in
electrical shock causing personal injury or death.
• Grounding may be accomplished by grounding metal conduit when installed in
accordance with electrical codes to the unit cabinet.
• Grounding may also be accomplished by attaching ground wire(s) to ground
lug(s) provided in the unit wiring compartment.
6.3 CONTROL WIRING
IMPORTANT: Class 2 low voltage control wiring SHOULD NOT be run in
conduit with main power wiring and must be separated from power wiring,
unless class 1 wire of proper voltage rating is used.
• Low voltage control wiring should be 18 AWG color-coded. For lengths
longer than 50 ft, 16 AWG wire should be used.
• Two 7/8” holes can be used for control wires going into the unit, one on left
side and one at the bottom.
Thermostat should be mounted on an inside wall about 58” from floor and
will not be affected by unconditioned air, sun and/or heat exposure. Follow
the instruction carefully because there are many wiring requirements.
See Fig. 6-1 ~ 2, Table 6-1 ~ 2

11
CAUTION
Label all wire prior to disconnection when servicing controls. Wiring errors
can cause improper and dangerous operation. Verify proper operation after
servicing.
CONTACTOR
GROUND
LUG
Refer to electrical data tables
to size the disconnect
Field-supplied disconnect
Single
phase
power
supply
Fig. 6-2 Typical Field Power Wiring Diagram
R
G
Y
W
C
R
G
Y
W1
W2
C
24 volt
transformer
THERMOSTAT
UNIT CONTROL BOARD
THERMINAL STRIP
** Minimum wire size of 18 AWG wire should be used for all field installed
24 volt wire.
* Only required on units with supplemental electric heat.
Fig. 6-1 Typical Field Control Wiring Diagram
240V
208V
COM
*
**

Table 6-1: 13 SEER Cooling only W/Without Electric Heat
12
1. Minimum Circuit Ampacity.
2. Maximum Over Current Protection per Standard UL 1995.
3. Fuse or HACR circuit breaker size installed at factory or field installed.
024T: GMCC compressor
036L/048L/060L: LG compressor
OD Fan
Motors
(each)
Supply
Blower
Motor
RLA LRA MCC FLA FLA Model kW Stages Amps
None - - None 14.5 20
EHK-05E 3.8/5 1 18.1/20.8 24.8/28.2 25/30
EHK-08E 5.6/7.5 1 27.1/31.3 36.1/41.3 40/45
EHK-08E 5.6/7.5 1 27.1/31.3 37.5/42.7 40/45
EHK-10E 7.5/10 1 36.1/41.7 47.3/54.3 50/60
None - - None 21.3 30
EHK-05E 3.8/5 1 18.1/20.8 26.2/29.6 30/30
EHK-10E 7.5/10 1 36.1/41.7 48.7/55.7 50/60
EHK-15E 11.3/15 2 54.2/62.5 71.3/81.7 80/90
None - - None 29.1 45
EHK-05E 3.8/5 1 18.1/20.8 27.2/30.6 30/40
EHK-08E 5.6/7.5 1 27.1/31.3 38.5/43.7 40/45
EHK-10E 7.5/10 1 36.1/41.7 49.7/56.7 50/60
EHK-15E 11.3/15 2 54.2/62.5 72.4/82.7 80/90
EHK-20E 15/20 2 72.2/83.3 94.9/108.7 100/110
None - - None 32.4 50
EHK-05E 3.8/5 1 18.1/20.8 27.4/30.8 30/40
EHK-08E 5.6/7.5 1 27.1/31.3 38.7/43.9 40/45
EHK-10E 7.5/10 1 36.1/41.7 49.9/56.9 50/60
EHK-15E 11.3/15 2 54.2/62.5 75.6/82.9 80/90
EHK-20E 15/20 2 72.2/83.3 95.1/108.9 100/110
Electric Heat Option
Max Fuse2/
Breaker3 Size
(Amps)
Compressors (each)
23.8A
0.95A
2.84A
060L
(5.0) 208/230-1-60 21.5A
Volt
Size
(Tons)
MCA1 (Amps)
036L
(3.0)
208/230-1-60
14.0A
70A
024T
(2.0)
208/230-1-60
9.7A
34.8A
15.1A
0.61A
1.71A
048L
(4.0)
208/230-1-60
19.0A
100A
37.7A
1.68A
3.66A
125A 34.4A 1.68A 3.82A

Table 6-2: 13 SEER Physical Data
13
MRC-24CWN1-M13T
0.2egannoTlanimoN
ARI COOLING PERFORMANCE
Gross Capacity @ ARI A point (Btu) 539,32
000,32)utB(yticapactenIRA
58.01REE
31REES
037MFClanimoN
0.2)Wk(rewopmetsyS
A014RepyttnaregirfeR
51-3)zo-bl(egrahctnaregirfeR
ARI HEATING PERFORMANCE
47
O
F Capacity rating (Btu) —
—)Wk(rewopmetsyS
17
O
F Capacity rating (Btu) —
—)Wk(rewopmetsyS
—).rh-sttaW/UTB(FPSH
DIMENSIONS (Inches)
46/52-
15htgneL
23/32-73htdiW
61/31-42thgieH
403)sbl(.TWGNITAREPO
COMPRESSORS
Type Rotary
1ytitnauQ
CONDENSER COIL DATA
71.01)tF.qS(aeraecaF
5.1swoR
02hcnirepsniF
23/9)hcni(retemaidebuT
Circuitry type interlaced
EVAPORATOR COIL DATA
63.3)tF.qS(aeraecaF
3swoR
71hcnirepsniF
23/9)hcni(retemaidebuT
Circuitry type interlaced
ecifirOlortnoctnaregirfeR
CONDENSER FAN DATA
46/3-22)hcni(retemaidnaF
porPepyT
tceriDepyte
virD
1sdeeps.oN
1srotomforebmuN
21/1hcaePHrotoM
5701MPR
0691MFClatotlanimoN
DIRECT DRIVE EVAP FAN DATA
1ytitnauQ
9×9)hcnI(eziSnaF
lagufirtneCepyT
3sdeeps.oN
4/1hcaePHrotoM
5701MPR
84ezisemarfrotoM
FILTERS
1×41×22)1(.nidednemmoceReziS).oN(
Component
3.0
35,963
34,800
10.40
13
1220
3.2
R410A
4-14
—
—
—
—
—
51-25/64
37-23/32
24-13/16
335
1
10.17
2
20
9/32
interlaced
3.36
4
17
9/32
interlaced
Orifice
22-3/64
Prop
Direct
1
1
1/6
825
2565
1
9×9
Centrifugal
3
3/4
1075
48
(1) 22×14×1
Scroll 1-spd
MRC-36CWN1-M13L
3.0
35,963
34,800
10.40
13
1220
3.2
R410A
4-14
—
—
—
—
—
51-25/64
37-23/32
24-13/16
335
1
10.17
2
20
9/32
interlaced
3.36
4
17
9/32
interlaced
Orifice
22-3/64
Prop
Direct
1
1
1/6
825
2565
1
9×9
Centrifugal
3
3/4
1075
48
(1) 22×14×1
Scroll 1-spd
MRC-36CWN1-M13L
Nominal Tonnage
ARI COOLING PERFORMANCE
Gross Capacity @ ARI A point (Btu)
ARI net capacity (Btu)
EER
SEER
Nominal CFM
System power (kW)
Refrigerant type
Refrigerant charge (lb-oz)
ARI HEATING PERFORMANCE
47
O
F Capacity rating (Btu)
System power (kW)
17
O
F Capacity rating (Btu)
System power (kW)
HSPF (BTU/Watts-hr.)
DIMENSIONS (Inches)
Length
Width
Height
OPERATING WT. (lbs)
COMPRESSORS
Type
Quantity
CONDENSER COIL DATA
Face area (Sq. Ft)
Rows
Fins per inch
Tube diameter(inch)
Circuitry type
EVAPORATOR COIL DATA
Face area (Sq. Ft)
Rows
Fins per inch
Tube diameter(inch)
Circuitry type
Refrigerant control
CONDENSER FAN DATA
Fan diameter (inch)
Type
Drive type
No. speeds
Number of motors
Motor HP each
RPM
Nominal total CFM
DIRECT DRIVE EVAP FAN DATA
Quantity
Fan Size (Inch)
Type
No. speeds
Motor HP each
RPM
Motor frame size
FILTERS
(No.) Size Recommended in.
Component
4.0
48,813
47,000
10.90
13
1600
4.22
R410A
8-3
—
—
—
—
—
57-61/64
42
33-3/64
445
1
15.77
2
20
9/32
interlaced
6.43
3
17
9/32
interlaced
Orifice
23-5/8
Prop
Direct
1
1
1/3
1075
3960
1
10×10
Centrifugal
3
3/4
1075
48
(1) 22×14×1
dps-1llorcS
MRC-48CWN1-M13L
5.0
58,075
56,000
10.55
13
2000
5.27
R410A
8-13
—
—
—
—
—
42
463
Scroll 1-spd
1
15.77
2.5
20
9/32
interlaced
6.43
4
17
9/32
interlaced
Orifice
23-5/8
Prop
Direct
1
1
1/3
1075
3960
1
10×10
Centrifugal
3
1
1075
48
(1) 22×14×1
MRC-60CWN1-M13L
33-3/64
57-61/64
Models

14
7.0 AIRFLOW PERFORMANCE
Airflow performance data is based on cooling performance with a coil and no filter in place. Use this perfor-
mance table for appropriate unit size, external static applied to unit and allow operation within the minimum
and maximum limits shown in table below for both cooling and electric heat operation.
7.1 AIRFLOW PERFORMANCE DATA
Table 7-1 Duct Application(208v)
0[0] 0.1[.02] 0.2[.05] 0.3[.07] 0.4[.10] 0.5[.12] 0.6[.15] 0.7[.17]
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
Motor
Speed
Model
Number
48
Low
Middle
High
24
Low
Middle
High
External Static Pressure-Inches W.C.[kPa]
CFM(L/S)(Watts)
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
36
Low
Middle
High
889(419)
1170(525) 1143(539) 1110(524) 1070(505) 1021(428)
694 752 806 859 902
390 376 360 343 326
1.88 1.81 1.73 1.66 1.58
1251(590) 1206(569) 1148(541) 1080(509) 989(466)
869 910 949 983 1017
436 416 392 368 340
2.11 2.01 1.91 1.8 1.68
1345(634) 1272(600) 1192(562) 1107(522) 980(462)
965 995 1022 1045 1070
499 470 441 413 377
2.43 2.31 2.18 2.07 1.91
460 553 638 710
161 159 156 152
0.78 0.77 0.75 0.73
776 831 884 930
228 220 213 203
1.1 1.06 1.03 0.99
929 970 1004
280 266 253
1.37 1.32 1.26
756(357) 706 (333) 654 (309) 600(283)
842(397) 782(369) 718(339) 625(295)
805(380) 693(327)
1497(706) 1449(683) 1401(661) 1349(636) 1291(609)
676 722 773 816 853
457 448 437 426 413
2.26 2.22 2.18 2.14 2.08
1571(741) 1511(713) 1445(681) 1370(646) 1249(589)
834 872 905 936 972
527 510 493 473 443
2.65 2.59 2.53 2.46 2.35
1685(795) 1610(759) 1527(720) 1428(673) 1192(562)
927 954 980 1003 1041
626 604 580 556 510
3.22 3.15 3.07 2.98 2.83

15
0[0] 0.1[.02] 0.2[.05] 0.3[.07] 0.4[.10] 0.5[.12] 0.6[.15] 0.7[.17]
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
Motor
Speed
Model
Number External Static Pressure-Inches W.C.[kPa]
CFM(L/S)(Watts)
60
Low
Middle
High
1865(879) 1822(859) 1770(835) 1712(808) 1643(775)
851 886 919 948 974
641 620 598 578 555
3.08 2.98 2.88 2.79 2.69
1875(884) 1808(853) 1729(816) 1642(774) 1542(727)
961 984 1005 1024 1043
664 639 613 587 558
3.21 3.11 3.0 2.89 2.78
1905(898) 1826(861) 1736(819) 1615(762) 1479(698)
1017 1034 1049 1063 1079
703 677 648 619 585
3.44 3.34 3.22 3.1 2.97
Table 7-2 Duct Application(230v)
0[0] 0.1[.02] 0.2[.05] 0.3[.07] 0.4[.10] 0.5[.12] 0.6[.15] 0.7[.17]
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
Motor
Speed
Model
Number
24
Low
Middle
High
External Static Pressure-Inches W.C.[kPa]
CFM(L/S)(Watts)
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
36
Low
Middle
High
974(459)
1312(619) 1280(604) 1243(586) 1197(565) 1143(539)
770 817 863 902 943
455 442 423 402 380
1.98 1.92 1.85 1.76 1.67
1376(649) 1323(624) 1257(593) 1176(554) 1082(510)
919 951 983 1011 1039
494 470 444 418 388
2.17 2.07 1.97 1.87 1.75
1451(684) 1372(647) 1279(603) 1178(556) 1041(491)
1005 1028 1050 1069 1089
563 533 502 469 434
2.5 2.38 2.26 2.14 2.0
509 591 671 737
195 191 187 183
0.85 0.83 0.81 0.79
812 866 911 949
271 261 251 240
1.18 1.14 1.1 1.06
960 993 1023
328 314 299
1.47 1.41 1.36
847(399) 800 (378) 754 (356) 701(331)
932(440) 878(414) 806(380) 725(342)
889(419) 794(375)
Table 7-1 Duct Application(208v) (Continued)

16
* The above airflow data for reference only.
●The air distribution system has the greatest effect on airflow. The duct system is totally controlled by the contractor. For this
reason, the contractor should use only industry-recognized procedures.
●Duct design and construction should be carefully done. System performance can be lowered dramatically through bad
planning or workmanship.
●Air supply diffusers must be selected and located carefully. They must be sized and positoined to deliver treated air along the
perimerter of the space. If they are too small for their intended airflow, they become noisy. If they are not located properly, they
cause drafts. Reture air grilles must be properly sized to carry air back to the blower. If they are too small, they also cause
noise.
●The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home. This ensures a
comfortable living space.
●An air velocity meter or airflow hood can give a reading of system CFM.
●When installation, installer should select the air speed according to the actual setting static pressure. Please refer to the Table
7-1 AIRFLOW PERFORMANCE DATA.
* In any stituation , the airflow of the unit should be in the range of 80% to 130% of 400CFM/Ton.
Table 7-2 Duct Application(230v) (Continued)
0[0] 0.1[.02] 0.2[.05] 0.3[.07] 0.4[.10] 0.5[.12] 0.6[.15] 0.7[.17]
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
CFM(L/S)
RPM
Watts
Amps
Motor
Speed
Model
Number
48
Low
Middle
High
External Static Pressure-Inches W.C.[kPa]
CFM(L/S)(Watts)
60
Low
Middle
High
1676(790) 1623(766) 1568(740) 1510(712) 1443(681)
751 793 833 870 903
536 522 508 493 468
2.42 2.37 2.32 2.27 2.21
1721(812) 1669(787) 1593(751) 1516(715) 1429(674)
891 922 948 973 997
608 591 670 550 529
2.82 2.76 2.69 2.62 2.55
1822(859) 1742(822) 1661(784) 1566(739) 1455(686)
966 988 1007 1025 1046
725 701 675 650 623
3.44 3.36 3.27 3.20 3.12
2037(961) 1984(936) 1936(913) 1859(877) 1780(840)
932 957 980 1001 1020
721 700 676 651 625
3.15 3.06 2.96 2.87 2.77
1998(943) 1931(911) 1855(875) 1757(829) 1654(780)
1010 1027 1043 1056 1071
729 706 677 651 623
3.24 3.14 3.04 2.94 2.83
2006(946) 1916(904) 1817(857) 1710(807) 1582(746)
1053 1065 1076 1086 1097
778 753 724 694 661
3.5 3.4 3.3 3.19 3.07

17
Table 7-4 Refrigerant charge for A/Csystem
Table 7-5 Refrigerant charge for A/C system
Table 7-3 Refrigerant charge for A/C system
55 60 65 70 75 80 85 90 95 100 105 110 115
165
161
157
153
149
145
141
137
133
129
125
121
117
113
109
105
MRC-24CWN1-M13T Cooling Charge Chart
CoolingMode Outdoor Ambient Temperature( F)
o
High Pressure Detected Valve(psig)/Vanne Détecté de Pression Haute(en psig)
Low Pressure Detected Valve(psig)
Vanne Détectée de Pression Basse(en psig)
284304325345365385405430455480505
282302323343363383403428453478503
280300321341361381401426451476501
258278298319339359379399424449474499
256276296317337357377397422447472497
253274295316337355372390416443469495
230251272293314335353370388414441467493
228249270291312333351368386412439465491
226247268289310331349366384410437463489
224245266287308329347364382408435461487
222243264285306327345362380406433459485
220241262283304325343360378404431457483
218239260281302323341358376402429455481
216237258279300321339356374400427453479
214235256277298319337354372398425451477
212233254275296317335352370396423449475
55 60 65 70 75 80 85 90 95 100 105 110 115
165
161
157
153
149
145
141
137
133
129
125
121
117
113
109
105
High Pressure Detected Valve(psig)/Vanne Détecté de Pression Haute(en psig)
Low Pressure Detected Valve(psig)
Vanne Détectée de Pression Basse(en psig)
MRC-36CWN1-M13L Cooling Charge Chart
Cooling Mode Outdoor Ambient Temperature( F)
o
289308328347372398423454485516547
287306326345370396421452483514545
285304324343368394419450481512543
264283302322341366392417448479510541
262281300320339364390415446477508539
260279298318337362388413444475506537
238258277296316335360386411442473504535
236256275294314333358384409440471502533
234254273292312331356382407438469500531
232252271290310329354380405436467498529
230250269288308327352378403434465496527
228248267286306325350376401432463494525
226246265284304323348374399430461492523
224244263282302321346372397428459490521
222242261280300319344370395426457488519
220240259278298317342368393424455486517
55 60 65 70 75 80 85 90 95 100 105 110 115
165
161
157
153
149
145
141
137
133
129
125
121
117
113
109
105
High Pressure Detected Valve(psig)/Vanne Détecté de Pression Haute(en psig)
Low Pressure Detected Valve(psig)
Vanne Détectée de Pression Basse(en psig)
MRC-48CWN1-M13L Cooling Charge Chart
Cooling Mode Outdoor Ambient Temperature( F)
o
284307329352372392412439467494521
282305327350370390410437464491518
280303325348368388408435462489516
255278301323346366386406433460487514
253276299321344364384404431458485512
251274297319342362382402429456483510
227249272295317340358376394423451480508
225247270293315338358378398425452479506
223245268291313336356376396423450477504
221243266289311334354374394421448475502
219241264287309332352372392419446473500
217239262285307330350370390417444471498
215237260283305328348368388415442469496
211234257280303326346366386413440467494
209232255278301324344364384411438465492
207230253276299322342362382409436463490

18
Table 7-6 Refrigerant charge for A/C system
55 60 65 70 75 80 85 90 95 100 105 110 115
165
161
157
153
149
145
141
137
133
129
125
121
117
113
109
105
High Pressure Detected Valve(psig)/Vanne Détecté de Pression Haute(en psig)
LowPressure Detected Valve(psig)
Vanne Détectée de Pression Basse(en psig)
MRC-60CWN1-M13L Cooling Charge Chart
Cooling Mode Outdoor Ambient Temperature( F)
o
290311333354375396417450482515547
288309331352373394415448480513545
286307329350371392413446478511543
263 284 305327348369390411444476509541
261 282 303325346367388409442474507539
259 280 301323344365386407440472505537
235 257 278299321342363384405438470503535
233 254 276298319341360379398432466499533
231 252 274296317339358377396430464497531
229 251 272294315337356375394428462495529
227 249 270292313335354373392426460493527
225 247 268290311333352371390424458491525
223 245 266288309331350369388422456489523
221 243 264286307329348367386420454487521
219 241 262284305327346365384418452485519
217 239 260282303325344363382416450483517

19
8.0 SYSTEM OPERATION
Refrigerant migration during the off cycle can result in a noisy start up. Add
a crankcase heater to minimize refrigeration migration, and to help eliminate
any start up noise or bearing “wash out”.
All heaters are located on the lower half of the compressor shell. Its purpose
is to drive refrigerant from the compressor shell during long off cycles, thus
preventing damage to the compressor during start-up.
At initial start-up or after extended shutdown periods, make sure the heater
is energized for at least 12 hours before the compressor is started.
(Disconnect switch on and wall thermostat off.)
The crankcase heater start-up conditions:
If the outdoor ambient temp. is ＜37.4°F and the compressor stopped for
more than three hours or the unit powered on once more, the crank heater
will be on.
Crankcase heater shut-down conditions:
If the outdoor ambient temp. is ＞44.6°F or the compressor start running ,the
crank heater will be off.
8.2 Protection
8.1 COMPRESSOR CRANKCASE HEATER(OPTIONAL)
Discharge temperature protection :
When discharge temp. is ＞275°F, the compressor will be off,
When discharge temp. is ＜194°F, the compressor will start running.
8.2.1 Protection for AC system

20
8.3 THERMOSTAT SIGNALS
Low pressure protection
When low pressure is ＜21PSIG,the compressor and the outdoor fan motor
will stop running.
When low pressure is ＞44PSIG,the compressor and the outdoor fan motor
will start running(3 minutes delay necessary ).
In stand-by status, if low pressure protection was checked out, the compressor
would not start running.
If protection cycles occur four times within 30 mins, the system must power on
once more.
T4 function:
When T4 is < 5 °F, the compressor will stop. If the electrical heater kit is installed
in the indoor unit, the outdoor unit will send the operation signal to the indoor unit.
When T4 is > 10.4 °F, the compressor will restart