INSTALLATION
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
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 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.
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
SUNLINE 2000™
SINGLE PACKAGE HEAT PUMP
BCH 036, 048 & 060
177820-YIM-A-0506
177820-YIM-A-0506
TABLE OF CONTENTS
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
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LIST OF FIGURES |
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Fig. # |
Pg. # |
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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 |
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W7212 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . . 12 |
6 |
FOUR AND SIX POINT LOADING . . . . . . . . . . . . |
. . . 13 |
7 |
UNIT DIMENSIONS (3 - 5 TON HEAT PUMP) FRONT |
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VIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . |
. . . 19 |
8 |
UNIT WITH ECONOMIZER RAINHOOD . . . . . . . |
. . . 20 |
9 |
UNIT WITH FIXED OUTDOOR AIR/MOTORIZED |
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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 |
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LIST OF TABLES |
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Tbl. # |
Pg. # |
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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 |
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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 |
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DRIVE) - SIDE DUCT APPLICATION . . . . . . . . . . . |
. 22 |
16 |
SUPPLY AIR BLOWER PERFORMANCE (4 TON BELT |
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DRIVE) - SIDE DUCT APPLICATION . . . . . . . . . . . |
. 23 |
17 |
SUPPLY AIR BLOWER PERFORMANCE (5 TON BELT |
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DRIVE) - SIDE DUCT APPLICATION . . . . . . . . . . . |
. 24 |
18SUPPLY AIR BLOWER PERFORMANCE (3 - 5 TON DIRECT DRIVE) - SIDE DUCT APPLICATION . . . . 25
19BELT 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
YORK Model BCH units are single package heat pumps. These are designed for 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.
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.
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.
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.
Additional information on the design, installation, operation and service of this equipment is available in the following reference forms:
•177820 -General Installation
•255036 - Technical Guide
Contact your local York® parts distribution center for authorized replacement parts.
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.
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
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PRODUCT CATEGORY |
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B = Single Package Heat Pump |
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VOLTAGE CODE |
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(Air Cooled) |
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25 = 208/230-3-60 |
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46 = 460-3-60 |
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PRODUCT GENERATION |
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58 = 575-3-60 |
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4 = Fourth Generation |
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5 = Fifth Generation |
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6 = Sixth Generation |
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FACTORY INSTALLED HEAT |
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7 = Seventh Generation |
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A = No Supplemental Heat |
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PRODUCT IDENTIFIER |
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CH = Heat Pump |
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NOMINAL COOLING CAPACITY |
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036 = 3 Ton |
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048 = 4 Ton |
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060 = 5 Ton |
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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.
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.
Unitary Products Group |
5 |
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177820-YIM-A-0506 |
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TABLE 1: UNIT APPLICATION DATA (BCH) |
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UNIT MODEL NUMBER |
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036 |
048 |
060 |
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Voltage Variation, |
208/230 |
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187 |
/ 253 |
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460 |
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414 |
/ 506 |
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Min. / Max.1 |
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575 |
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518 |
/ 630 |
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Supply Air CFM, Nom. |
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1200 |
1600 |
2000 |
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Wet Bulb Temperature (ºF) of Air on |
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57 |
/ 72 |
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Evaporator Coil, Min. / Max |
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Dry Bulb Temperature (ºF) of Air on |
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0 / |
120 |
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Condenser Coil, Min. / Max. |
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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.
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.
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 from 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.
Do not permit overhanging structures or shrubs to obstruct outdoor air discharge outlet, combustion air inlet or vent outlets.
6 |
Unitary Products Group |
177820-YIM-A-0506
DUCTWORK
Ductwork should be designed and sized according to the methods in Manual Q of the Air 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 |
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 replaced with same size and type. Dirty filters will reduce the capacity of the unit and will result in frosted coils or safety shutdown. 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:
•Compressor compartment
•Electric Heat compartment
•Blower compartment
•Main control box
•Filter compartment
Refer to the Dimensions and Clearances shown in Figures 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
TYPICAL POWER WIRING
REFER TO THE ELECTRICAL DATA
TABLES TO SIZE THE DISCONNECT
SWITCH, OVERCURRENT PROTEC-
TION AND WIRING.
TYPICAL CONTROL WIRING
COOLING / HEATING (24 VOLT THERMOSTAT)
THERMOSTAT1
TERMINALS
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UNIT TERMINAL |
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RH |
STRIP TB1 |
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ADD |
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JUMPER |
RC |
R |
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Y |
Y1 |
24 VOLT |
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TRANSFORMER |
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Y2 |
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WW1
W2
GG
C
124 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.
COOLING / HEATING (ELECTRONIC THERMOSTAT)
MULTI STAGE
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THERMOSTAT1 |
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COOLING / HEATING (ELECTRONIC THERMOSTAT) |
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TERMINALS |
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UNIT TERMINAL |
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ADD |
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RC |
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STRIP TB1 |
24 VOLT |
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SINGLE STAGE |
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RH |
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R |
TRANSFORMER |
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JUMPER |
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Y1 |
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Y1 |
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THERMOSTAT1 |
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Y2 |
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2 |
Y2 |
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TERMINALS |
UNIT TERMINAL |
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W1 |
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W1 |
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STRIP TB1 |
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4 |
W2 |
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3 |
W2 |
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RH |
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G |
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G |
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RC |
R |
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B |
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C |
ADD |
Y |
Y1 |
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JUMPER |
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LED 1 |
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X |
W |
W1 |
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LED 2 |
NOT |
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OCC |
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G |
G |
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USED |
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COM |
4 |
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C |
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A1 |
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ADD |
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24 VOLT |
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JUMPER |
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A2 |
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T |
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TO REMOTE SENSOR |
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TRANSFORMER |
T 2TH040702224 IF USED
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1ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET07701024 (INCLUDES SUBBASE). |
1 |
ELECTRONIC PROGRAMMABLE THERMOSTAT 2ET04700224 (INCLUDES SUBBASE). |
TO CONTROL THE ECONOMIZER ON SECOND STAGE COOLING, USE THERMOSTAT |
2 |
SECOND STAGE COOLING IS NOT REQUIRED ON UNITS LESS ECONOMIZER. |
2TH04700224. |
3SECOND STAGE HEATING IS ONLY REQUIRED ON UNITS WITH A TWO STAGE ELECTRIC HEATER.
4REMOVE JUMPER J2 FROM TERMINALS 4 AND 9 ON JUMPER PLUG CONNECTOR P6 ON UNITS WITH ECONOMIZER. TERMINALS A1 AND A2 PROVIDE A RELAY OUT-PUT TO CLOSE THE OUTDOOR ECONOMIZER DAMPERS WHEN THE THERMOSTAT SWITCHES TO THE SET-BACK POSITION.
FIGURE 3 - TYPICAL FIELD POWER & CONTROL WIRING
Unitary Products Group |
9 |
177820-YIM-A-0506
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.
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 |
Maximum Length1 |
18 AWG |
150 Feet |
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1. From the unit to the thermostat and back to the unit.
OPTIONS/ACCESSORIES
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
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MINIMUM SUPPLY AIR CFM |
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UNITMODEL SIZE NOMINAL |
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VOLTAGE |
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HEATER SIZE NOMINAL KW |
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TONS |
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5 |
7 |
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10 |
15 |
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20 |
30 |
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208/230-3-60 |
1100 |
1100 |
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1200 |
1200 |
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1300 |
- |
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3 |
460-3-60 |
- |
1100 |
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1200 |
1200 |
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1300 |
- |
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575-3-60 |
- |
- |
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1200 |
1200 |
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1300 |
- |
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208/230-3-60 |
1300 |
1300 |
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1300 |
1300 |
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1300 |
- |
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4 |
460-3-60 |
- |
1300 |
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1300 |
1300 |
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1300 |
- |
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575-3-60 |
- |
- |
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1300 |
1300 |
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1400 |
- |
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208/230-3-60 |
1600 |
1600 |
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1600 |
1600 |
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1600 |
1600 |
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5 |
460-3-60 |
1600 |
1600 |
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1600 |
1600 |
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1600 |
1600 |
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575-3-60 |
- |
1600 |
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1600 |
1600 |
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1600 |
1800 |
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The instruction for the optional economizer/motorized damper and rain hood can be found in form 035- 07364-000. 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.
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 |