York BCH 036, 048 & 060 User Manual
INSTALLATION
SUNLINE 2000™
MANUAL
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . 4
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
REFERENCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . 4
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . 5
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . 31
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . 32
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . 34
SINGLE PACKAGE HEAT PUMP
BCH 036, 048 & 060
See the following page for a complete Table of Contents.
NOTES, CAUTIONS AND WARNINGS
The installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes
clarify or make the installation easier. Cautions
to prevent equipment damage. Warnings
alert installer that personal injury and/or equipment damage may result if installation procedure is not handled
properly.
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
are intended to
are given
are given to
SAVE THIS MANUAL
177820-YIM-A-0506
TABLE OF CONTENTS
177820-YIM-A-0506
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . 4
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
REFERENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . 4
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . . 5
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
INSTALLATION SAFETY INFORMATION: . . . . . . . . 5
LIMITATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
RIGGING AND HANDLING . . . . . . . . . . . . . . . . . . . . 6
CLEARANCES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
DUCTWORK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
CONDENSATE DRAIN . . . . . . . . . . . . . . . . . . . . . . . . 7
COMPRESSORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
SERVICE ACCESS . . . . . . . . . . . . . . . . . . . . . . . . . . 8
THERMOSTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
POWER AND CONTROL WIRING . . . . . . . . . . . . . . 10
OPTIONS/ACCESSORIES . . . . . . . . . . . . . . . . . . . . 10
ELECTRIC HEAT . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
ECONOMIZER/MOTORIZED DAMPER AND RAIN
HOOD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
POWER EXHAUST/BAROMETRIC RELIEF DAMPER
AND RAIN HOOD . . . . . . . . . . . . . . . . . . . . . . . . . . .11
ECONOMIZER AND POWER EXHAUST DAMPER
SET POINT ADJUSTMENTS AND INFORMATION 11
MINIMUM POSITION ADJUSTMENT . . . . . . . . . . . .12
ENTHALPY SET POINT ADJUSTMENT . . . . . . . . . .12
POWER EXHAUST DAMPER SETPOINT (WITH OR
WITHOUT POWER EXHAUST) . . . . . . . . . . . . . . . .12
PHASING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
SUPPLY AIR BLOWERS . . . . . . . . . . . . . . . . . . . . . 26
CHECKING SUPPLY AIR CFM . . . . . . . . . . . . . . . . 26
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
SEQUENCE OF OPERATIONS OVERVIEW . . . . . . 27
COOLING SEQUENCE OF OPERATION . . . . . . . . 27
CONTINUOUS BLOWER . . . . . . . . . . . . . . . . . . . . . . 27
INTERMITTENT BLOWER . . . . . . . . . . . . . . . . . . . . 28
NO OUTDOOR AIR OPTIONS . . . . . . . . . . . . . . . . . 28
ECONOMIZER WITH SINGLE ENTHALPY
SENSOR - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
ECONOMIZER WITH DUAL ENTHALPY
SENSORS - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
ECONOMIZER (SINGLE OR DUAL) WITH POWER
EXHAUST - . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
MOTORIZED OUTDOOR AIR DAMPERS - . . . . . . . 28
COOLING OPERATION ERRORS . . . . . . . . . . . . . 28
HIGH-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . 28
LOW-PRESSURE LIMIT SWITCH . . . . . . . . . . . . . . . 29
FREEZESTAT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
LOW AMBIENT COOLING . . . . . . . . . . . . . . . . . . . . . 29
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . 29
COMPRESSOR PROTECTION . . . . . . . . . . . . . . . 29
FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
HEATING SEQUENCE OF OPERATIONS . . . . . . . 30
WITH OR WITHOUT ELECTRIC HEAT . . . . . . . . . . . 30
DEFROST MODE . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
FORCED DEFROST . . . . . . . . . . . . . . . . . . . . . . . . . 30
SAFETY CONTROLS . . . . . . . . . . . . . . . . . . . . . . . 30
HEAT ANTICIPATOR SETPOINTS . . . . . . . . . . . . . 31
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . . 31
PRESTART CHECK LIST . . . . . . . . . . . . . . . . . . . . 31
OPERATING INSTRUCTIONS . . . . . . . . . . . . . . . . 32
POST START CHECK LIST . . . . . . . . . . . . . . . . . . 32
SHUT DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 32
COOLING TROUBLESHOOTING GUIDE . . . . . . . . 32
UNIT FLASH CODES . . . . . . . . . . . . . . . . . . . . . . . 34
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
NORMAL MAINTENANCE . . . . . . . . . . . . . . . . . . . 34
FILTERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
MOTORS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
OUTDOOR COIL . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
2 Unitary Products Group
177820-YIM-A-0506
LIST OF FIGURES
Fig. # Pg. #
1 RECOMMENDED DRAIN PIPING . . . . . . . . . . . . . . . . 7
2 COMPRESSOR RESTRAINING BRACKET . . . . . . . . 7
3 TYPICAL FIELD POWER & CONTROL WIRING . . . . 9
4 ENTHALPY SETPOINT ADJUSTMENT . . . . . . . . . . 12
5 HONEYWELL ECONOMIZER CONTROL
W7212 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
6 FOUR AND SIX POINT LOADING . . . . . . . . . . . . . . . 13
7 UNIT DIMENSIONS (3 - 5 TON HEAT PUMP) FRONT
VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
8 UNIT WITH ECONOMIZER RAINHOOD . . . . . . . . . . 20
9 UNIT WITH FIXED OUTDOOR AIR/MOTORIZED
DAMPER RAINHOOD . . . . . . . . . . . . . . . . . . . . . . . . 20
10 UNIT DIMENSIONS (REAR VIEW) . . . . . . . . . . . . . . 21
11 DISCONNECT/BLOWER ACCESS LOCATION . . . . 21
12 BELT ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . 26
13 PRESSURE DROP ACROSS COIL . . . . . . . . . . . . . . 27
LIST OF TABLES
Tbl. # Pg. #
1 UNIT APPLICATION DATA (BCH) . . . . . . . . . . . . . . . 6
2 CONTROL WIRE SIZES . . . . . . . . . . . . . . . . . . . . . . 10
3 ELECTRIC HEATER CFM LIMITATIONS . . . . . . . . . 11
4 CENTER OF GRAVITY (ALL MODELS) . . . . . . . . . . 13
5 BCH 4 POINT LOADS WEIGHT DISTRIBUTION . . . 13
6 BCH 6 POINT LOADS WEIGHT DISTRIBUTION . . . 13
7 PHYSICAL DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
8 OPERATING WEIGHTS (LBS.) . . . . . . . . . . . . . . . . . 14
9 ELECTRICAL DATA - BCH036 - 060 DIRECT
DRIVE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
10 ELECTRICAL DATA - BCH036 - 060 BELT DRIVE . . 17
11 ELECTRIC HEAT CORRECTION FACTORS . . . . . . 19
12 VOLTAGE LIMITATIONS . . . . . . . . . . . . . . . . . . . . . 19
13 UTILITIES ENTRY . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
14 MINIMUM CLEARANCES . . . . . . . . . . . . . . . . . . . . . 21
15 SUPPLY AIR BLOWER PERFORMANCE (3 TON BELT
DRIVE) - SIDE DUCT APPLICATION . . . . . . . . . . . . 22
16 SUPPLY AIR BLOWER PERFORMANCE (4 TON BELT
DRIVE) - SIDE DUCT APPLICATION . . . . . . . . . . . . 23
17 SUPPLY AIR BLOWER PERFORMANCE (5 TON BELT
DRIVE) - SIDE DUCT APPLICATION . . . . . . . . . . . . 24
18 SUPPLY AIR BLOWER PERFORMANCE (3 - 5 TON
DIRECT DRIVE) - SIDE DUCT APPLICATION . . . . 25
19 BELT DRIVE BLOWER MOTOR AND DRIVE DATA. 25
20 STATIC RESISTANCES . . . . . . . . . . . . . . . . . . . . . . 26
21 ELECTRIC HEAT LIMIT CONTROL SETTING . . . . . 31
22 ELECTRIC HEAT ANTICIPATOR SETPOINTS . . . . 31
23 UNIT CONTROL BOARD FLASH CODES . . . . . . . . 34
Unitary Products Group 3
177820-YIM-A-0506
GENERAL
YORK Model BCH units are single package heat
pumps. These are designed fo r outdoor installation on
a rooftop or slab.
The units are completely assembled on rigid, permanently attached base rails. All piping, refrigerant
charge, and electrical wiring is factory installed and
tested. The units require electric power, duct connections, installation of fixed outdoor air intake damper
(units without economizer or motorized damper option
only) at the point of installation.
The supplemental field installed electric heaters have
nickel-chrome elements and utilize single point power
connection.
SAFETY CONSIDERATIONS
Due to system pressure, moving parts and electrical
components, installation and servicing of air conditioning equipment can be hazardous. Only qualified,
trained, service personnel should install, repair, maintain or service this equipment.
Observe all precautions in the literature, on labels and
tags accompanying the equipment whenever working
on air conditioning equipment. Be sure to follow all
other safety precautions that apply.
• 177820 -General Installation
• 255036 - Technical Guide
RENEWAL PARTS
Contact your local York® parts distribution center for
authorized replacement parts.
APPROVALS
Design listed by CSA as follows:
• For use as a heat pump only with or without
optional electric heat.
• For outdoor installation only.
• For installation on combustible material.
This product must be installed in strict compliance with the enclosed installation instructions
and any applicable local, state, and national
codes including, but not limited to, building,
electrical, and mechanical codes.
Wear safety glasses and work gloves, and follow all
safety codes. Use a quenching cloth and have a fire
extinguisher available for all brazing operations.
INSPECTION
As soon as a unit is received, it should be inspected for
possible damage during transit. If damage is evident,
the extent of the damage should be noted on the carrier's freight bill. A separate request for inspection by
the carrier's agent should be made in writing. Refer to
Form 50.15-NM for additional information.
REFERENCE
Additional information on the design, installation, operation and service of this equipment is available in the
following reference forms:
Improper installation may create a condition
where the operation of the product could cause
personal injury or property damage.
The installer should pay particular attention to the
words: NOTE, CAUTION and WARNING. Notes are
intended to clarify or make the installation easier. Cautions are given to prevent equipment damage. Warnings are given to alert installer that personal injury and/
or equipment damage may result if installation procedure is not handled properly.
4 Unitary Products Group
177820-YIM-A-0506
B 7 C H A
PRODUCT GENERATION
4 = Fourth Generation
5 = Fifth Generation
6 = Sixth Generation
7 = Seventh Generation
PRODUCT CATEGORY
B = Single Package Heat Pump
(Air Cooled)
PRODUCT IDENTIFIER
CH = Heat Pump
VOLTAGE CODE
25 = 208/230-3-60
46 = 460-3-60
58 = 575-3-60
036 = 3 Ton
048 = 4 Ton
060 = 5 Ton
30 6 2 5
FACTORY INSTALLED HEAT
A = No Supplemental Heat
NOMINAL COOLING CAPACITY
PRODUCT NOMENCLATURE
INSTALLATION
INSTALLATION SAFETY INFORMATION:
Read these instructions before continuing this appliance installation. This is an outdoor combination heating and cooling unit. The installer must assure that
these instructions are made available to the consumer
and with instructions to retain them for future reference.
1. Install this unit only in a location and position as
specified on page 6 of these instructions.
2. This equipment is not to be used for temporary
heating of buildings or structures under construction.
LIMITATIONS
These units must be installed in accordance with the
following national and local safety codes:
In U.S.A
• National Electrical Code ANSI/NFPA No. 70.
Unitary Products Group 5
.:
In Canada
:
• Current Canadian Electrical Code C22.1.
• Local plumbing and waste water codes.
• Other applicable local codes.
Refer to the Unit Application Data Table 1 and the
Electrical Data table for the unit.
If components are to be added to a unit to 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 calculation made according to
the methods of the Air Conditioning Contractors of
America (ACCA).
This unit is not to be used for temporary heating of
buildings or structures under construction.
TABLE 1: UNIT APPLICATION DATA (BCH)
UNIT MODEL NUMBER 036 048 060
Voltage Variation,
Min. / Max.
1
Supply Air CFM, Nom. 1200 1600 2000
208/230 187 / 253
460 414 / 506
575 518 / 630
177820-YIM-A-0506
Wet Bulb Temper ature (ºF) of Air on
Evaporator Coil, Min. / Max
Dry Bulb Temperature (ºF) of Air on
Condenser Coil, Min. / Max.
1.
Utilization range “A” in accordance with ARI Standard 110.
LOCATION
Use the following guidelines to select a suitable location for these units.
1. Unit is designed for outdoor installation only.
2. Condenser coils must have an unlimited supply of
air.
3. Where a choice of location is possible, position the
unit on either north or east side of building.
4. For ground level installation, use a level concrete
slab with a minimum thickness of 4 inches. The
length and width should be at least 6 inches
greater than the unit base rails. Do not tie slab to
the building foundation.
5. Roof structures must be able to support the weight
of the unit and its options and/or accessories. Unit
must be installed on a solid level roof curb or
appropriate angle iron frame.
6. Maintain level tolerance to 1/2 inch maximum
across the entire length or width of the unit.
If a unit is to be installed on a roof curb or special frame
other than a YORK roof curb, gasketing must be
applied to all surfaces that come in contact with the unit
underside.
57 / 72
0 / 120
Units may also be moved or lifted with a forklift. Slotted
openings in the base rails are provided for this purpose. Fork lengths must be a minimum of 42 inches.
Remove the nesting brackets fr om the four corners on
the top of the unit. All screws that are removed when
removing the brackets must be replaced on the unit.
Refer to Table 8 for unit weights and to the Figure 6 for
approximate center of gravity.
Before lifting a unit, make sure that all panels
are in place and that its weight is distributed
equally on all cables so it will lift evenly.
CLEARANCES
All units require certain clearances for proper operation
and service. Installer must make provisions for adequate ventilation air. Refer to Dimensions and Clearances shown in Figures 7 through 10 and Table 14 for
the clearances required for combustible construction,
servicing, and proper unit operation.
RIGGING AND HANDLING
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.
6 Unitary Products Group
Do not permit overhanging structures or shrubs
to obstruct outdoor air discharge outlet, combustion air inlet or vent outlets.
177820-YIM-A-0506
DUCTWORK
Ductwork should be designed and sized according to
the methods in Manual Q of the A ir Conditioning Contractors of America (ACCA).
A closed return duct system shall be used. This shall
not preclude use of economizers or outdoor fresh air
intake. The supply and return air duct connections at
the unit should be made with flexible joints to minimize
noise.
The supply and return air duct systems should be
designed for the CFM and static requirements of the
job. They should NOT be sized to match the dimensions of the duct connections on the unit.
When fastening ductwork to side duct flanges
on unit, insert screws through duct flanges
only. DO NOT insert screws through casing.
Outdoor ductwork must be insulated and
waterproofed.
Refer to Figures 7 and 10 for information concerning
side and bottom supply and return air duct openings.
CONDENSATE DRAIN
Plumbing must conform to local codes. Use a sealing
compound on male pipe threads. Install a condensate
drain line from the one-inch NPT female connection on
the unit to an open drain.
NOTE: The condensate drain operates in a negative
pressure in the cabinet. The condensate drain
line MUST be trapped to provide proper drainage. See Figure 1.
FIGURE 1 - RECOMMENDED DRAIN PIPING
COMPRESSORS
Units are shipped with compressor mountings factoryadjusted and ready for operation.
Units with scroll compressors have a shipping bracket
which must be removed after the unit is set in place.
See Figure 2.
Compressor
Mounting bracket
base
Remove these
screws (2)
Mounting bracket
top (remove)
Wire tie
(cut and remove)
FIGURE 2 - COMPRESSOR RESTRAINING
BRACKET
Unitary Products Group 7
• Compressor compartment
• Electric Heat compartment
177820-YIM-A-0506
Do not loosen compressor mounting bolts.
FILTERS
One-inch or two-inch filters can be supplied with each
unit. Filters must always be installed ahead of the
evaporator coil and must be kept clean or replace d with
same size and type. Dirty filters will reduce the capacity
of the unit and will result in frosted c oils or safety sh utdown. Minimum filter area and required sizes are
shown in Physical Data Table 7.
SERVICE ACCESS
The following removable panels provide access to all
serviceable components:
• Blower compartment
• Main control box
• Filter compartment
Refer to the Dimensions and Clearances shown in Fig-
ures 7 and 11 for location of these access panels.
Make sure that all screws and panel latches
are replaced and properly positioned on the
unit to maintain an airtight seal.
8 Unitary Products Group
177820-YIM-A-0506
RH
RC
Y
W
G
R
Y1
W1
C
G
ADD
JUMPER
THERMOSTAT
1
TERMINALS
UNIT TERMINAL
STRIP TB1
24 VOLT
TRANSFORMER
1
ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET07701024 (INCLUDES SUBBASE).
TO CONTROL THE ECONOMIZER ON SECOND STAGE COOLING, USE THERMOSTAT
2TH04700224.
COOLING / HEATING (ELECTRONIC THERMOSTAT)
SINGLE STAGE
TYPICAL POWER WIRING
REFER TO THE ELECTRICAL DATA
TABLES TO SIZE THE DISCONNECT
SWITCH, OVERCURRENT PROTECTION AND WIRING.
TYPICAL CONTROL WIRING
COOLING / HEATING (24 VOLT THERMOSTAT)
1
UNIT TERMINAL
STRIP TB1
R
ADD
JUMPER
THERMOSTAT
TERMINALS
RH
RC
COOLING / HEATING (ELECTRONIC THERMOSTAT)
MULTI STAGE
RC
RH
Y1
Y2
W1
W2
G
B
LED 1
LED 2
COM
A1
A2
T
T
1
UNIT TERMINAL
STRIP TB1
2
3
NOT
USED
4
TO REMOTE SENSOR
2TH040702224 IF USED
THERMOSTAT
TERMINALS
ADD
JUMPER
4
ADD
JUMPER
1
ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET04700224 (INCLUDES SUBBASE).
2
FIGURE 3 - TYPICAL FIELD POWER & CONTROL WIRING
SECOND STAGE COOLING IS NOT REQUIRED ON UNITS LESS ECONOMIZER.
3
SECOND STAGE HEATING IS ONLY REQUIRED ON UNITS WITH A TWO STAGE
ELECTRIC HEATER.
4
REMOVE JUMPER J2 FROM TERMINALS 4 AND 9 ON JUMPER PLUG CONNECTOR
P6 ON UNITS WITH ECONOMIZER. TERMINALS A1 ANDA2 PROVIDE A RELAY
OUT-PUT TO CLOSE THE OUTDOOR ECONOMIZER DAMPERS WHEN THE
THERMOSTAT SWITCHES TO THE SET-BACK POSITION.
Unitary Products Group 9
Y
W
G
1
24 VOLT THERMOSTAT 2ET07701024. TO CONTROL THE ECONOMIZER ON THE SECOND
STAGE COOLING OR TO HAVE AN ELECTRIC HEAT ACCESSORY WITH TWO STAGES OF
HEAT, USE THERMOSTAT 2TH0471024.
24 VOLT
TRANSFORMER
W1
W2
OCC
R
Y1
Y2
G
C
X
Y1
W1
W2
24 VOLT
Y2
G
C
TRANSFORMER
THERMOSTAT
The room thermostat should be located on an inside
wall approximately 56 inches above the floor where it
will not be subject to drafts, sun exposure or heat from
electrical fixtures or appliances. Follow the manufacturer's instructions enclosed with the thermostat for
general installation procedure. A minimum of seven
color-coded insulated wires (#18 AWG) should be used
to connect the thermostat to the unit.
POWER AND CONTROL WIRING
Field wiring to the unit must conform to provisions of
the National Electrical Code, ANSI / NFPA No. 70 (in
U.S.A.), current Canadian Electrical Code C22.1 (in
Canada) and/or local ordinances. The unit must be
electrically grounded in accordance with NEC and CEC
(as specified above) and/or local codes. Voltage tolerances, which must be maintained at the compressor
terminals, during starting and running conditions, are
indicated on the unit Rating Plate and the Unit Application Data table.
The internal wiring harness furnished with this unit is
an integral part of a CSA design certified unit. Field
alteration to comply with electrical codes should not be
required.
A fused disconnect switch should be field provided for
the unit. The switch must be separate from all other circuits. Wire entry at knockout openings require conduit
fittings to comply with NEC (in U.S.A.), CEC (in Canada) and/or local codes. If any of the wire supplied with
the unit must be replaced, replacement wire must be of
the type shown on the wiring diagram and the same
minimum gauge as the replaced wire.
Use copper conductors properly sized to carry the load.
Each unit must be wired with a separate branch circuit
fed directly from the meter panel and properly fused.
177820-YIM-A-0506
When connecting electrical power and control
wiring to the unit, waterproof type connectors
MUST BE USED so that water or moisture
cannot be drawn into the unit during normal
operation. The above waterproofing conditions
will also apply when installing a field-supplied
disconnect switch.
Refer to the Typical Field Wiring Figure 3 and to the
appropriate unit wiring diagram for control circuit and
power wiring information.
TABLE 2: CONTROL WIRE SIZES
Wire Size
18 AWG 150 Feet
1.
From the unit to the thermostat and back to the unit.
Maximum Length
1
OPTIONS/ACCESSORIES
ELECTRIC HEAT
The field-installed heaters are wired for single point
power supply. Power supply need only be brought into
the single point terminal block and thermostat wiring to
the low voltage terminal strip located in the upper portion of the unit control box.
These CSA approved heaters are located within the
central compartment of the unit with the heater elements extending into the supply air chamber. Refer to
Figure 7 for access panel location.
Fuses are supplied, where required, by the factory.
Some KW sizes require fuses and others do not. Refer
to Table 3 for minimum CFM limitations and to Tables
9 and 10 for electrical data.
10 Unitary Products Group
177820-YIM-A-0506
TABLE 3: ELECTRIC HEATER CFM LIMITATIONS
UNITMODEL SIZE NOMINAL
TONS
3
4
5
VOLTAGE
208/230-3-60 1100 1100 1200 1200 1300 -
460-3-60 - 1100 1200 1200 1300 575-3-60 - - 1200 1200 1300 -
208/230-3-60 1300 1300 1300 1300 1300 -
460-3-60 - 1300 1300 1300 1300 575-3-60 - - 1300 1300 1400 -
208/230-3-60 1600 1600 1600 1600 1600 1600
460-3-60 1600 1600 1600 1600 1600 1600
575-3-60 - 1600 1600 1600 1600 1800
MINIMUM SUPPLY AIR CFM
HEATER SIZE NOMINAL KW
5 7 10 15 20 30
ECONOMIZER/MOTORIZED DAMPER AND RAIN HOOD
The instruction for the optional economizer/motorized
damper and rain hood can be found in form 03507364-000. Use these instructions when field assembling an economizer rain hood onto a unit. The outdoor
and return air dampers, the damper actuator, the
damper linkage, the outdoor and return air divider baffles, and all the control sensors are factory mounted as
part of the “Factory installed” economizer/motorized
damper options.
POWER EXHAUST/BAROMETRIC RELIEF DAMPER AND RAIN HOOD
The instructions for the power exhaust/barometric relief
damper and rain hood can be found in form 530.18N1.10V.
All of the components, including the dampers, hardware, and mounting instructions are shipped in a single
package external from the unit and must be field
assembled and installed.
Power exhaust is only available as a field installed
accessory.
ECONOMIZER AND POWER EXHAUST DAMPER
SET POINT ADJUSTMENTS AND INFORMATION
Remove the economizer access panel from the unit.
Loosen but do not remove the two panel latches.
Locate the economizer control module, where the following adjustments will be made.
Extreme care must be exercised in turning all
setpoint, maximum, and minimum damper
positioning adjustment screws to prevent twisting them off.
Check that the damper blades move smoothly without
binding; carefully turn the Minimum Position Adjusting
screw (found on the damper control module) fully
clockwise and then set the thermostat indoor fan switch
to the on position and then off, or energize and deenergize terminals “R” to “G”.
Unitary Products Group 11
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