Coleman Dual Fuel Installation Manual download pdf (Page 2)

18630-UAI-E-0808

2 Johnson Controls Unitary Products

Local codes take precedent over any recommendations con-

tained in these instructions. In lieu of local codes, the equip-

ment should be installed in accordance with National Electric

Code and in accordance with the recommendations made by

the National Board of Fire Underwriters.

GENERAL INFROMATION

Contents of this Package are:

1. Heat Pump Dual Fuel Control Box

2. Outdoor Thermostat

3. User’s Information Manual (Supplementary)

4. Installation Instructions

APPLICATION

The 3024-7481/F heat pump dual fuel control may be used with

any heat pump in conjunction with any residential fossil fuel

burning furnace that has a blower capable of supplying air vol-

umes suitable for air conditioning. It may also be used with any

heat pump in conjunction with any UPG manufactured housing

furnace. See Table 1 for air volume requirements. The furnace

must also have a 40 VA transformer and a blower relay.

The control is designed to separately operate the heating sys-

tems of the heat pump and the furnace. The only time that both

will operate simultaneously is during the defrosting of the heat

pump where the furnace is operated to temper the supply air to

the conditioned space.

During normal heating operation the wall thermostat controls

the temperature of the home. The outdoor thermostat is used to

select either the heat pump or the furnace, depending on its

set-point. At outdoor ambient temperature above the set-point,

the heat pump will operate to maintain the home comfort. Below

the set-point, the furnace operates. Regardless of which system

is operating, the first stage of the wall thermostat is normally in

control (unless the home loses heat faster than can be compen-

sated for by the heat pump, at which point the second stage of

the wall thermostat will turn on the gas furnace until the first

stage is satisfied).

If the wall thermostat selection switch is placed in "Emergency

Heat" position, or during a heat pump "Safety Lockout" the fur-

nace will provide all heat. Normal operation will be resumed

when the "System" switch is returned to the "Heat" position, or

when the Safety Lockout" is reset (see heat pump instructions

for further information about a "Safety Lockout" condition).

Read these instruction carefully before the installation of any

component of the heat pump system. Where these instructions

differ from the instruction packed with other components, these

instructions shall take precedence. Otherwise, use components

that do not differ as a guide line for installing those components.

In most cases, the control package should not be retrofitted to

gun furnaces; use a 3024C7473 control package for these

applications. The 3024C7473 control includes a 40 VA trans-

former, blower motor terminals, and a blower control relay that

are required for such applications.

Do not install any coil to a furnace which is to be operated dur-

ing the heating season without attaching the refrigerant lines to

the coil and opening the system service valves. Failure to do so

will cause excessive pressures within the coil that could dam-

age the coil and cause personal injury.

NOTE:

1. The heat pump outdoor unit, indoor coil, and refrigerant line

set must be matched up as shown in the tabular data sheet

packed with the heat pump outdoor unit.

2. For horizontal coil applications, field fabricated blank-off

plates or transition plenum may be required to fit the coil

cabinet to the furnace outlet flanges.

3. Amp. draw for the wall thermostat's first stage heat antici-

pator is a non-adjustable .6 amp. The second stage antici-

pator should be adjusted to .3 amp.

FIRE HAZARD – Failure to observe the following

warnings could cause furnace malfunction resulting in

fire or asphyxiation.

1. When indoor heat pump coils are used with fuel burning

furnaces, they must be installed in the discharged air

stream. Installation of a heat pump coil in the return air

stream of a fuel burning furnace could cause excessive

heat exchanger corrosion and burner malfunction.

2. No attempt shall be made to operate the heat pump in

the heating mode at the same time the fuel burning fur-

nace is in operation. Failure to observe this warning will

result in abnormally high refrigerant temperatures and

pressures resulting in system failure.

Ground unit to prevent electric shock. Before making

electrical connections or servicing the system, discon-

nect power to both the indoor and the outdoor units.

Nominal Tons of

Air Conditioning

Air Volume CFM

1-1/2 600

2 800

2-1/2 1000

3 1200

3-1/2 1400

4 1600

5 1800

1 2 3 4 5 6 7 ... 11 12

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Coleman Dual Fuel Installation Manual Page 2

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