Nordyne Single Package Heat Pump, Heat Pump Installation Manual

13 SEER Single Package Heat Pump
Single Package Heat Pump
IMPORTANT:
Read this owner information to become familiar with the capabilities and use of your appliance. Keep this with literature on other appliances where you have easy access to it in the future. If a problem occurs, check the instructions and follow recommendations given. If these suggestions don’t eliminate your problem, call your installing contractor or distributor in your area.
INTRODUCTION
Your heat pump is a unique, all weather comfort­control system appliance. The basic operation of the heating/cooling system is described and illustrated on page 1 of this manual. The surprising fact that heat exists in air even at below-freezing temperatures is actually the basic law of physics which the heat pump uses to provide energy saving heating comfort. At outdoor temperatures of 47° Fahrenheit
(or 8° Celsius), your heat pump can deliver approximately 2 to 3 units of heat energy per each unit of electrical energy used, as compared to a maximum of only 1 unit of heat energy produced with conventional heating systems. During the cooling season, the heat pump reverses the fl ow of the heat-absorbing refrigerant to become an energy-effi cient, central air conditioner.
SECTION 1. OWNER INFORMATION
Your heat pump will heat and cool your home year round, saving your energy dollars. During the summer, a heat pump performs like any normal air conditioner. That is, the excess heat energy inside the home is absorbed by the refrigerant and exhausted outside the home. During the winter months, a heat pump performs like an air conditioner run in reverse. That is, available heat energy outside the home is absorbed by the refrigerant and exhausted inside the home. This is an effi cient heating means because you only pay for “moving” the heat from the outdoors to the indoor area. You do not pay to generate the heat, as is the case with more traditional furnace designs.
SYSTEM MODE
FAN SWITCH
Figure 1. Typical Thermostat
TEMPERATURE SENSOR
It is the sole responsibility of the homeowner to make certain that the heat pump has been correctly set up and adjusted to operate properly.
A warranty certifi cate with full details is included with the heat pump. However, the manufacturer will not be responsible for any costs found neces­sary to correct problems due to improper setup, improper installation, adjustments, improper op­erating procedure on the part of the user, etc.
Some specifi c examples of service calls which are not included in the limited warranty are:
1. Correcting wiring problems in the electrical circuit supplying the heat pump.
2. Resetting circuit breakers or other switches.
3. Adjusting or calibrating of thermostat.
To avoid misunderstandings at a later date, carefully review these responsibilities with your dealer or service company.
OPERATING INSTRUCTIONS
To Operate Your Heat Pump For Cooling —
1. Set the thermostat system switch to COOL and the thermostat fan switch to AUTO. (See Figure 1)
2. Set the ther mostat temperature selector to the desired cooling temperature. The outdoor unit fan, the indoor blower, and the compressor will all cycle on and off to maintain the indoor temperature at the desired cooling level.
NOTE: If the thermostat temperature level is re-adjusted, or if the thermostat system switch is re-positioned, the outdoor unit fan and the compressor may not start immediately. A protective timer circuit holds the compressor and the outdoor fan off for approximately fi ve minutes following a previous operation or the interruption of the main electric power.
To Operate Your Heat Pump For Heating —
1. Set the thermostat system switch for HEAT and the thermostat fan switch to AUTO. (See Figure 1)
2. Set the thermostat temperature selector to the desired heating temperature. The outdoor unit fan, the indoor blower, and the compressor will all cycle on and off to maintain the indoor temperature at the desired heating level.
NOTE: If the thermostat temperature level is re-adjusted, or if the thermostat system switch is re-positioned, the outdoor unit fan and the compressor may not start immediately. A protective timer circuit holds the compressor and the outdoor fan off for approximately fi ve minutes following a previous operation or the interruption of the main electrical power.
Emergency Heat — Some thermostats will include a system switch position termed EM HT or AUX HT, etc. This is a back-up heating mode to be used only if there is a suspected problem. With the system switch set to EM HT, etc., the compressor and outdoor fan will be locked off and supplemental heat (electric resistance heating) will be used as a source of heat. Sustained
2
use of electric resistance heat in place of the heat pump will result in an increase in electric utility costs.
Defrost — During cold weather heating opera­tion, the outdoor unit will develop a coating of snow and ice on the heat transfer coil. This is normal and the unit will periodically defrost itself. During the defrost cycle, the outdoor fan will stop, while the compressor continues to run and heat the outdoor coil, causing the snow and ice to melt. During defrost, there may be some steam rise from the outdoor unit as the warm coil causes some melted frost to evaporate.
SECTION 2. INSTALLER INFORMATION
GENERAL
Read the following instructions completely before performing the installation.
These instructions are for the use of qualifi ed personnel specially trained and experienced in the installation of this type of equipment and related system components. Some states require installation and service personnel to be licensed. Unqualifi ed individuals should not attempt to interpret these instructions or install this equipment.
The single package heat pump is completely assembled, factory wired, and factory run tested. The units are ready for easy and immediate installation.
Use of components other than those speci­fi ed may invalidate ARI Certifi cation, Code Agency Listing, and limited warranty on the air conditioner.
PRE-INSTALLATION CHECK
Before any installation is attempted, the cool­ing load of the area to be conditioned must be calculated and a system of the proper capacity selected. It is recommended that the area to be conditioned be completely insulated and vapor sealed.
The installer should comply with all local codes and regulations which govern the installation of this type of equipment. Local codes and regulations take precedence over any recom­mendations contained in these instructions. Consult local building codes and the National Electrical Code (ANSI CI) for special installation requirements.
The electrical supply should be checked to de­termine if adequate power is available. If there is any question concerning the power supply, contact the local power company.
The single packaged heat pumps are designed for outdoor installation only and can be readily connected into the high static duct system of a home. The only connections needed for instal­lation are the supply and return ducts, the line voltage, and thermostat wiring. A complete heat pump system typically consists of:
• Single Package Heat Pump
• Home Fittings Kit
• Unit Fittings Kit
• Thermostat
CAUTION:
To prevent personal injury and/or equipment damage, check thermostat manufacturer’s operation of fan relay circuit when in EMER HEAT. When the thermostat system switch is in the EMER HEAT position, the thermostat must energize the fan relay when the
fan switch is in the AUTO position.
Inspecting Equipment: All units are securely
packed at the time of shipment and, upon arrival, should be carefully inspected for damage. Claims for damage (apparent or concealed) should be fi led immediately with the carrier.
INSTALLATION
1. SELECT THE BEST LOCATION FOR THE HEAT PUMP UNIT
IMPORTANT: DO NOT PLACE UNIT UNDER THE HOME.
Select a solid, level position, preferably on a concrete slab, slightly above the grade level, and parallel to the home.
The hot condenser air must be discharged up and away from the home, and if possible, in a direction with the prevailing wind.
Do not place the unit in a confi ned space.
If practical, place the heat pump where it and
the ducts will be shaded from the afternoon sun when the heat load is greatest.
3
Transition Duct Screws
6 ft.
24"
12"
12"
14” Duct Dimples
Figure 2. Minimum Unit Clearances
Try to select a site for the unit that is as close
as possible to the proposed return grille location.
Keep in mind that the length of the supply and
return ducts should be kept to a minimum with no sharp radiused bends.
2. UNPACK THE UNIT
It is recommended that the unit be unpacked at the installation site to minimize damage due to handling.
CAUTION:
Do not tip the unit on its side. Oil may enter the compressor cylinders and cause starting trouble. If unit has been set on its side, restore to upright posi­tion and do not run for several hours. Then run unit for a few seconds. Do this three or four times with fi ve minutes
between runs.
a. Remove the bands from around the unit.
b. Unfold the top and bottom cap fl anges.
c. Carefully remove the top cap and tube.
3. CLEARANCES
Minimum clearances, as specifi ed in Figure 2, MUST by maintained from adjacent structures to provide room for proper servicing and air circulation.
Supply Air
Figure 3. Return and Supply Air Fittings
Do NOT install unit in a confi ned or recessed area that will allow discharge air from the unit to re-circulate into the condenser air inlet, through the coil.
Service Access Clearance:
Blower access panel side .......................... 24”
Electrical compartment access panel side .. . 12”
Clearance between overhang and top of
unit .........................................................72”
Clearance around condenser coil area to wall
or shrubs (excludes duct panel side) .......... 12”
Minimum clearance to combustible materials:
Combustible Base (Wood or Class A, B, or C
roof Covering material) ...............................0”
Supply and Return Air Ducts .......................0”
Duct Connection side ..................................0”
DUCT REQUIREMENTS
The supply duct system, including the number and type of registers, will have much more ef­fect on the performance of an air conditioning system then any other factor. The duct must be suffi ciently large to conduct an adequate amount of air to each register.
4. INSTALL THE RETURN AND SUPPLY AIR
FITTINGS ON THE UNIT
The supply and return fi ttings are included with select models. If supplied, the duct fi ttings are
13 SEER Return Dia. (in)
2 Ton 12
2 1/2 Ton 14
3 Ton 14
3 1/2 Ton 14
4 Ton 14
Return Air
4
Figure 4. Return Air Box
shipped in the supply duct. They attach to the unit openings with a fl ange and bead arrangement, secured with two sheet metal screws. Note: For ease of access, install fi tting before positioning unit in fi nal location.
SUPPLY DUCT
Position the supply duct collar, if supplied, so the edge of the unit opening fi ts between the fl ange and the bead. Overlap the collar ends keeping the small screw holes underneath. Align the holes in the crimped area and install one screw.
Note: It may be necessary to loosen the four screws that hold the transition duct in order to install the supply fi tting. Re-tighten when instal-
lation is complete.
Tap collar as necessary to ensure engagement with unit opening and install second screw. Tighten fi rst screw. Rotate collar clockwise so joint is near three o’clock position.
RETURN DUCT
The 12” return duct is installed in the same manner as the supply duct. If the duct has a 14” return, follow these instructions.
Align the slots with the holes in the collar and install two screws. Position the collar over the opening and align the four notches in the collar with the four dimples in the panel. Using self­drilling screws (10-16x.5) attach the collar to the rear panel. On some models a 14” duct collar is
provided for the return duct.
grille and fi lter (Figure 4) should not be located in heavy traffi c areas like hallways or center of rooms. A good spot is in a corner or under a table, if a minimum two inch clearance is available. If desired, the return opening can be located inside a closet with louvered doors that have an open area equal to or greater than the 12” x 20” grille furnished. The return air grille can be placed in the wall of a closet and the air ducted into the fi lter box through a boxed-in area at the closet fl oor level. Make sure the fi lter is readily accessible.
After determining the location of the return air opening, start the installation from under the home by cutting a small hole in the fi ber under­board to determine how the fl oor joist location will affect cutting the opening needed for the box. Floor joists generally are located on 16” centers, leaving 14-3/8” between joists. After measuring the return air box (approximately 12-1/4” x 20­1/4”), cut the hole through the fl oor so that the box will fi t between the fl oor joists. Care should be taken when cutting through carpeting to avoid snags. In most installations it will be necessary to cut a similar hole in the fi berboard directly under the hole in the fl oor. However, if the fl oor is more than ten inches deep, it will only be necessary to cut a hole for the collar on the return air box or for the insulated duct.
Set the box into the opening and fasten with screws or nails. Put the fi lter and return air grille in place.
6. LOCATING AND INSTALLING THE SUPPLY DAMPER(S)
When locating the supply damper(s), carefully check fl oor joists and frame members that could interfere with the installation of the damper or fl exible duct. Ideally, the damper should be located in the bottom of the main duct, forward of center of the home, at least three feet from the nearest register. The round supply opening in the slanted side of the damper should face
AUTOMATIC DAMPER IS CLOSED
WHEN HEAT PUMP IS OFF
5. LOCATING AND INSTALLING THE RETURN AIR ASSEMBLY
To avoid complications, locate and install the return air assembly fi rst. The return air box with
Figure 5. Supply Damper
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